annotate src/memfile.c @ 4099:77fa4dee43fc v7.3.803

updated for version 7.3.803 Problem: Substitute with confirmation and then "q" does not replace anything. (John McGowan) Solution: Do not break the loop, skip to the end.
author Bram Moolenaar <bram@vim.org>
date Wed, 06 Feb 2013 18:24:02 +0100
parents 8bd38abda314
children 04736b4030ec
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7
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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * memfile.c: Contains the functions for handling blocks of memory which can
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12 * be stored in a file. This is the implementation of a sort of virtual memory.
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13 *
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14 * A memfile consists of a sequence of blocks. The blocks numbered from 0
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15 * upwards have been assigned a place in the actual file. The block number
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16 * is equal to the page number in the file. The
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17 * blocks with negative numbers are currently in memory only. They can be
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18 * assigned a place in the file when too much memory is being used. At that
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19 * moment they get a new, positive, number. A list is used for translation of
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20 * negative to positive numbers.
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21 *
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22 * The size of a block is a multiple of a page size, normally the page size of
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23 * the device the file is on. Most blocks are 1 page long. A Block of multiple
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24 * pages is used for a line that does not fit in a single page.
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25 *
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26 * Each block can be in memory and/or in a file. The block stays in memory
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27 * as long as it is locked. If it is no longer locked it can be swapped out to
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28 * the file. It is only written to the file if it has been changed.
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29 *
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30 * Under normal operation the file is created when opening the memory file and
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31 * deleted when closing the memory file. Only with recovery an existing memory
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32 * file is opened.
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33 */
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34
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35 #include "vim.h"
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36
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37 /*
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38 * Some systems have the page size in statfs.f_bsize, some in stat.st_blksize
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39 */
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40 #ifdef HAVE_ST_BLKSIZE
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41 # define STATFS stat
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42 # define F_BSIZE st_blksize
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43 # define fstatfs(fd, buf, len, nul) mch_fstat((fd), (buf))
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44 #else
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45 # ifdef HAVE_SYS_STATFS_H
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46 # include <sys/statfs.h>
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47 # define STATFS statfs
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48 # define F_BSIZE f_bsize
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49 # ifdef __MINT__ /* do we still need this? */
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50 # define fstatfs(fd, buf, len, nul) mch_fstat((fd), (buf))
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51 # endif
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52 # endif
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53 #endif
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54
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55 /*
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56 * for Amiga Dos 2.0x we use Flush
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57 */
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58 #ifdef AMIGA
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59 # ifdef FEAT_ARP
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60 extern int dos2; /* this is in os_amiga.c */
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61 # endif
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62 # ifdef SASC
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63 # include <proto/dos.h>
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64 # include <ios1.h> /* for chkufb() */
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65 # endif
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66 #endif
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67
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68 #define MEMFILE_PAGE_SIZE 4096 /* default page size */
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69
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70 static long_u total_mem_used = 0; /* total memory used for memfiles */
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71
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72 static void mf_ins_hash __ARGS((memfile_T *, bhdr_T *));
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73 static void mf_rem_hash __ARGS((memfile_T *, bhdr_T *));
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74 static bhdr_T *mf_find_hash __ARGS((memfile_T *, blocknr_T));
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75 static void mf_ins_used __ARGS((memfile_T *, bhdr_T *));
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76 static void mf_rem_used __ARGS((memfile_T *, bhdr_T *));
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77 static bhdr_T *mf_release __ARGS((memfile_T *, int));
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78 static bhdr_T *mf_alloc_bhdr __ARGS((memfile_T *, int));
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79 static void mf_free_bhdr __ARGS((bhdr_T *));
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80 static void mf_ins_free __ARGS((memfile_T *, bhdr_T *));
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81 static bhdr_T *mf_rem_free __ARGS((memfile_T *));
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82 static int mf_read __ARGS((memfile_T *, bhdr_T *));
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83 static int mf_write __ARGS((memfile_T *, bhdr_T *));
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84 static int mf_write_block __ARGS((memfile_T *mfp, bhdr_T *hp, off_t offset, unsigned size));
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85 static int mf_trans_add __ARGS((memfile_T *, bhdr_T *));
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86 static void mf_do_open __ARGS((memfile_T *, char_u *, int));
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87 static void mf_hash_init __ARGS((mf_hashtab_T *));
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88 static void mf_hash_free __ARGS((mf_hashtab_T *));
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89 static void mf_hash_free_all __ARGS((mf_hashtab_T *));
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90 static mf_hashitem_T *mf_hash_find __ARGS((mf_hashtab_T *, blocknr_T));
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91 static void mf_hash_add_item __ARGS((mf_hashtab_T *, mf_hashitem_T *));
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92 static void mf_hash_rem_item __ARGS((mf_hashtab_T *, mf_hashitem_T *));
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93 static int mf_hash_grow __ARGS((mf_hashtab_T *));
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94
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95 /*
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96 * The functions for using a memfile:
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97 *
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98 * mf_open() open a new or existing memfile
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99 * mf_open_file() open a swap file for an existing memfile
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100 * mf_close() close (and delete) a memfile
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101 * mf_new() create a new block in a memfile and lock it
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102 * mf_get() get an existing block and lock it
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103 * mf_put() unlock a block, may be marked for writing
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104 * mf_free() remove a block
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105 * mf_sync() sync changed parts of memfile to disk
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106 * mf_release_all() release as much memory as possible
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107 * mf_trans_del() may translate negative to positive block number
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108 * mf_fullname() make file name full path (use before first :cd)
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109 */
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110
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111 /*
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112 * Open an existing or new memory block file.
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113 *
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114 * fname: name of file to use (NULL means no file at all)
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115 * Note: fname must have been allocated, it is not copied!
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116 * If opening the file fails, fname is freed.
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117 * flags: flags for open() call
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118 *
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119 * If fname != NULL and file cannot be opened, fail.
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120 *
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121 * return value: identifier for this memory block file.
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122 */
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123 memfile_T *
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124 mf_open(fname, flags)
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125 char_u *fname;
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126 int flags;
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127 {
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128 memfile_T *mfp;
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129 off_t size;
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130 #if defined(STATFS) && defined(UNIX) && !defined(__QNX__)
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131 # define USE_FSTATFS
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132 struct STATFS stf;
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133 #endif
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134
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135 if ((mfp = (memfile_T *)alloc((unsigned)sizeof(memfile_T))) == NULL)
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136 return NULL;
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137
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138 if (fname == NULL) /* no file for this memfile, use memory only */
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139 {
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140 mfp->mf_fname = NULL;
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141 mfp->mf_ffname = NULL;
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142 mfp->mf_fd = -1;
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143 }
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144 else
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145 {
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146 mf_do_open(mfp, fname, flags); /* try to open the file */
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147
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148 /* if the file cannot be opened, return here */
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149 if (mfp->mf_fd < 0)
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150 {
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151 vim_free(mfp);
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152 return NULL;
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153 }
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154 }
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155
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156 mfp->mf_free_first = NULL; /* free list is empty */
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157 mfp->mf_used_first = NULL; /* used list is empty */
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158 mfp->mf_used_last = NULL;
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159 mfp->mf_dirty = FALSE;
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160 mfp->mf_used_count = 0;
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161 mf_hash_init(&mfp->mf_hash);
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162 mf_hash_init(&mfp->mf_trans);
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163 mfp->mf_page_size = MEMFILE_PAGE_SIZE;
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164 #ifdef FEAT_CRYPT
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165 mfp->mf_old_key = NULL;
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166 #endif
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167
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168 #ifdef USE_FSTATFS
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169 /*
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170 * Try to set the page size equal to the block size of the device.
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171 * Speeds up I/O a lot.
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172 * When recovering, the actual block size will be retrieved from block 0
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173 * in ml_recover(). The size used here may be wrong, therefore
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174 * mf_blocknr_max must be rounded up.
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175 */
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176 if (mfp->mf_fd >= 0
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177 && fstatfs(mfp->mf_fd, &stf, sizeof(struct statfs), 0) == 0
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178 && stf.F_BSIZE >= MIN_SWAP_PAGE_SIZE
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179 && stf.F_BSIZE <= MAX_SWAP_PAGE_SIZE)
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parents:
diff changeset
180 mfp->mf_page_size = stf.F_BSIZE;
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parents:
diff changeset
181 #endif
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parents:
diff changeset
182
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parents:
diff changeset
183 if (mfp->mf_fd < 0 || (flags & (O_TRUNC|O_EXCL))
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parents:
diff changeset
184 || (size = lseek(mfp->mf_fd, (off_t)0L, SEEK_END)) <= 0)
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parents:
diff changeset
185 mfp->mf_blocknr_max = 0; /* no file or empty file */
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vimboss
parents:
diff changeset
186 else
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vimboss
parents:
diff changeset
187 mfp->mf_blocknr_max = (blocknr_T)((size + mfp->mf_page_size - 1)
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vimboss
parents:
diff changeset
188 / mfp->mf_page_size);
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parents:
diff changeset
189 mfp->mf_blocknr_min = -1;
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parents:
diff changeset
190 mfp->mf_neg_count = 0;
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parents:
diff changeset
191 mfp->mf_infile_count = mfp->mf_blocknr_max;
1230
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vimboss
parents: 1226
diff changeset
192
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vimboss
parents: 1226
diff changeset
193 /*
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
194 * Compute maximum number of pages ('maxmem' is in Kbyte):
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
195 * 'mammem' * 1Kbyte / page-size-in-bytes.
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
196 * Avoid overflow by first reducing page size as much as possible.
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
197 */
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vimboss
parents: 1226
diff changeset
198 {
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vimboss
parents: 1226
diff changeset
199 int shift = 10;
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vimboss
parents: 1226
diff changeset
200 unsigned page_size = mfp->mf_page_size;
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vimboss
parents: 1226
diff changeset
201
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vimboss
parents: 1226
diff changeset
202 while (shift > 0 && (page_size & 1) == 0)
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vimboss
parents: 1226
diff changeset
203 {
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vimboss
parents: 1226
diff changeset
204 page_size = page_size >> 1;
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vimboss
parents: 1226
diff changeset
205 --shift;
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vimboss
parents: 1226
diff changeset
206 }
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vimboss
parents: 1226
diff changeset
207 mfp->mf_used_count_max = (p_mm << shift) / page_size;
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
208 if (mfp->mf_used_count_max < 10)
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vimboss
parents: 1226
diff changeset
209 mfp->mf_used_count_max = 10;
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vimboss
parents: 1226
diff changeset
210 }
7
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211
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parents:
diff changeset
212 return mfp;
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parents:
diff changeset
213 }
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vimboss
parents:
diff changeset
214
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vimboss
parents:
diff changeset
215 /*
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vimboss
parents:
diff changeset
216 * Open a file for an existing memfile. Used when updatecount set from 0 to
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
217 * some value.
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parents:
diff changeset
218 * If the file already exists, this fails.
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parents:
diff changeset
219 * "fname" is the name of file to use (NULL means no file at all)
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parents:
diff changeset
220 * Note: "fname" must have been allocated, it is not copied! If opening the
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vimboss
parents:
diff changeset
221 * file fails, "fname" is freed.
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vimboss
parents:
diff changeset
222 *
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parents:
diff changeset
223 * return value: FAIL if file could not be opened, OK otherwise
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vimboss
parents:
diff changeset
224 */
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vimboss
parents:
diff changeset
225 int
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vimboss
parents:
diff changeset
226 mf_open_file(mfp, fname)
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vimboss
parents:
diff changeset
227 memfile_T *mfp;
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vimboss
parents:
diff changeset
228 char_u *fname;
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vimboss
parents:
diff changeset
229 {
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parents:
diff changeset
230 mf_do_open(mfp, fname, O_RDWR|O_CREAT|O_EXCL); /* try to open the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
231
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vimboss
parents:
diff changeset
232 if (mfp->mf_fd < 0)
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vimboss
parents:
diff changeset
233 return FAIL;
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vimboss
parents:
diff changeset
234
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vimboss
parents:
diff changeset
235 mfp->mf_dirty = TRUE;
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vimboss
parents:
diff changeset
236 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
237 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
238
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vimboss
parents:
diff changeset
239 /*
2249
6d3d35ff2c2b Use full path in undofile(). Updated docs.
Bram Moolenaar <bram@vim.org>
parents: 2003
diff changeset
240 * Close a memory file and delete the associated file if 'del_file' is TRUE.
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
241 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
242 void
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vimboss
parents:
diff changeset
243 mf_close(mfp, del_file)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
244 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
245 int del_file;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
246 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
247 bhdr_T *hp, *nextp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
248
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
249 if (mfp == NULL) /* safety check */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
250 return;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
251 if (mfp->mf_fd >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
252 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
253 if (close(mfp->mf_fd) < 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
254 EMSG(_(e_swapclose));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
255 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
256 if (del_file && mfp->mf_fname != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
257 mch_remove(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
258 /* free entries in used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
259 for (hp = mfp->mf_used_first; hp != NULL; hp = nextp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
260 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
261 total_mem_used -= hp->bh_page_count * mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
262 nextp = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
263 mf_free_bhdr(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
264 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
265 while (mfp->mf_free_first != NULL) /* free entries in free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
266 vim_free(mf_rem_free(mfp));
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
267 mf_hash_free(&mfp->mf_hash);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
268 mf_hash_free_all(&mfp->mf_trans); /* free hashtable and its items */
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
269 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
270 vim_free(mfp->mf_ffname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
271 vim_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
272 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
273
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vimboss
parents:
diff changeset
274 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
275 * Close the swap file for a memfile. Used when 'swapfile' is reset.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
276 */
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vimboss
parents:
diff changeset
277 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
278 mf_close_file(buf, getlines)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
279 buf_T *buf;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
280 int getlines; /* get all lines into memory? */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
281 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
282 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
283 linenr_T lnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
284
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vimboss
parents:
diff changeset
285 mfp = buf->b_ml.ml_mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
286 if (mfp == NULL || mfp->mf_fd < 0) /* nothing to close */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
287 return;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
288
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
289 if (getlines)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
290 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
291 /* get all blocks in memory by accessing all lines (clumsy!) */
1066
bffbbb566d6b updated for version 7.0-192
vimboss
parents: 1033
diff changeset
292 mf_dont_release = TRUE;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
293 for (lnum = 1; lnum <= buf->b_ml.ml_line_count; ++lnum)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
294 (void)ml_get_buf(buf, lnum, FALSE);
1066
bffbbb566d6b updated for version 7.0-192
vimboss
parents: 1033
diff changeset
295 mf_dont_release = FALSE;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
296 /* TODO: should check if all blocks are really in core */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
297 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
298
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
299 if (close(mfp->mf_fd) < 0) /* close the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
300 EMSG(_(e_swapclose));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
301 mfp->mf_fd = -1;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
302
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
303 if (mfp->mf_fname != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
304 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
305 mch_remove(mfp->mf_fname); /* delete the swap file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
306 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
307 vim_free(mfp->mf_ffname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
308 mfp->mf_fname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
309 mfp->mf_ffname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
310 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
311 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
312
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
313 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
314 * Set new size for a memfile. Used when block 0 of a swapfile has been read
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
315 * and the size it indicates differs from what was guessed.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
316 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
317 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
318 mf_new_page_size(mfp, new_size)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
319 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
320 unsigned new_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
321 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
322 /* Correct the memory used for block 0 to the new size, because it will be
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
323 * freed with that size later on. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
324 total_mem_used += new_size - mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
325 mfp->mf_page_size = new_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
326 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
327
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
328 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
329 * get a new block
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
330 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
331 * negative: TRUE if negative block number desired (data block)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
332 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
333 bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
334 mf_new(mfp, negative, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
335 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
336 int negative;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
337 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
338 {
1166
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
339 bhdr_T *hp; /* new bhdr_T */
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
340 bhdr_T *freep; /* first block in free list */
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
341 char_u *p;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
342
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
343 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
344 * If we reached the maximum size for the used memory blocks, release one
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
345 * If a bhdr_T is returned, use it and adjust the page_count if necessary.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
346 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
347 hp = mf_release(mfp, page_count);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
348
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
349 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
350 * Decide on the number to use:
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
351 * If there is a free block, use its number.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
352 * Otherwise use mf_block_min for a negative number, mf_block_max for
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
353 * a positive number.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
354 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
355 freep = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
356 if (!negative && freep != NULL && freep->bh_page_count >= page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
357 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
358 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
359 * If the block in the free list has more pages, take only the number
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
360 * of pages needed and allocate a new bhdr_T with data
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
361 *
1166
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
362 * If the number of pages matches and mf_release() did not return a
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
363 * bhdr_T, use the bhdr_T from the free list and allocate the data
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
364 *
1166
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
365 * If the number of pages matches and mf_release() returned a bhdr_T,
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
366 * just use the number and free the bhdr_T from the free list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
367 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
368 if (freep->bh_page_count > page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
369 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
370 if (hp == NULL && (hp = mf_alloc_bhdr(mfp, page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
371 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
372 hp->bh_bnum = freep->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
373 freep->bh_bnum += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
374 freep->bh_page_count -= page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
375 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
376 else if (hp == NULL) /* need to allocate memory for this block */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
377 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
378 if ((p = (char_u *)alloc(mfp->mf_page_size * page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
379 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
380 hp = mf_rem_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
381 hp->bh_data = p;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
382 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
383 else /* use the number, remove entry from free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
384 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
385 freep = mf_rem_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
386 hp->bh_bnum = freep->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
387 vim_free(freep);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
388 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
389 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
390 else /* get a new number */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
391 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
392 if (hp == NULL && (hp = mf_alloc_bhdr(mfp, page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
393 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
394 if (negative)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
395 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
396 hp->bh_bnum = mfp->mf_blocknr_min--;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
397 mfp->mf_neg_count++;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
398 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
399 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
400 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
401 hp->bh_bnum = mfp->mf_blocknr_max;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
402 mfp->mf_blocknr_max += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
403 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
404 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
405 hp->bh_flags = BH_LOCKED | BH_DIRTY; /* new block is always dirty */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
406 mfp->mf_dirty = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
407 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
408 mf_ins_used(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
409 mf_ins_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
410
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
411 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
412 * Init the data to all zero, to avoid reading uninitialized data.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
413 * This also avoids that the passwd file ends up in the swap file!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
414 */
2249
6d3d35ff2c2b Use full path in undofile(). Updated docs.
Bram Moolenaar <bram@vim.org>
parents: 2003
diff changeset
415 (void)vim_memset((char *)(hp->bh_data), 0,
6d3d35ff2c2b Use full path in undofile(). Updated docs.
Bram Moolenaar <bram@vim.org>
parents: 2003
diff changeset
416 (size_t)mfp->mf_page_size * page_count);
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
417
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
418 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
419 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
420
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
421 /*
2267
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
422 * Get existing block "nr" with "page_count" pages.
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
423 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
424 * Note: The caller should first check a negative nr with mf_trans_del()
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
425 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
426 bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
427 mf_get(mfp, nr, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
428 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
429 blocknr_T nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
430 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
431 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
432 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
433 /* doesn't exist */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
434 if (nr >= mfp->mf_blocknr_max || nr <= mfp->mf_blocknr_min)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
435 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
436
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
437 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
438 * see if it is in the cache
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
439 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
440 hp = mf_find_hash(mfp, nr);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
441 if (hp == NULL) /* not in the hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
442 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
443 if (nr < 0 || nr >= mfp->mf_infile_count) /* can't be in the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
444 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
445
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
446 /* could check here if the block is in the free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
447
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
448 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
449 * Check if we need to flush an existing block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
450 * If so, use that block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
451 * If not, allocate a new block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
452 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
453 hp = mf_release(mfp, page_count);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
454 if (hp == NULL && (hp = mf_alloc_bhdr(mfp, page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
455 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
456
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
457 hp->bh_bnum = nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
458 hp->bh_flags = 0;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
459 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
460 if (mf_read(mfp, hp) == FAIL) /* cannot read the block! */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
461 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
462 mf_free_bhdr(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
463 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
464 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
465 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
466 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
467 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
468 mf_rem_used(mfp, hp); /* remove from list, insert in front below */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
469 mf_rem_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
470 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
471
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
472 hp->bh_flags |= BH_LOCKED;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
473 mf_ins_used(mfp, hp); /* put in front of used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
474 mf_ins_hash(mfp, hp); /* put in front of hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
475
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
476 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
477 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
478
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
479 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
480 * release the block *hp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
481 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
482 * dirty: Block must be written to file later
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
483 * infile: Block should be in file (needed for recovery)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
484 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
485 * no return value, function cannot fail
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
486 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
487 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
488 mf_put(mfp, hp, dirty, infile)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
489 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
490 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
491 int dirty;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
492 int infile;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
493 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
494 int flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
495
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
496 flags = hp->bh_flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
497
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
498 if ((flags & BH_LOCKED) == 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
499 EMSG(_("E293: block was not locked"));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
500 flags &= ~BH_LOCKED;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
501 if (dirty)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
502 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
503 flags |= BH_DIRTY;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
504 mfp->mf_dirty = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
505 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
506 hp->bh_flags = flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
507 if (infile)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
508 mf_trans_add(mfp, hp); /* may translate negative in positive nr */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
509 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
510
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
511 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
512 * block *hp is no longer in used, may put it in the free list of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
513 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
514 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
515 mf_free(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
516 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
517 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
518 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
519 vim_free(hp->bh_data); /* free the memory */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
520 mf_rem_hash(mfp, hp); /* get *hp out of the hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
521 mf_rem_used(mfp, hp); /* get *hp out of the used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
522 if (hp->bh_bnum < 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
523 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
524 vim_free(hp); /* don't want negative numbers in free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
525 mfp->mf_neg_count--;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
526 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
527 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
528 mf_ins_free(mfp, hp); /* put *hp in the free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
529 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
530
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
531 #if defined(__MORPHOS__) && defined(__libnix__)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
532 /* function is missing in MorphOS libnix version */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
533 extern unsigned long *__stdfiledes;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
534
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
535 static unsigned long
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
536 fdtofh(int filedescriptor)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
537 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
538 return __stdfiledes[filedescriptor];
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
539 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
540 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
541
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
542 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
543 * Sync the memory file *mfp to disk.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
544 * Flags:
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
545 * MFS_ALL If not given, blocks with negative numbers are not synced,
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
546 * even when they are dirty!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
547 * MFS_STOP Stop syncing when a character becomes available, but sync at
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
548 * least one block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
549 * MFS_FLUSH Make sure buffers are flushed to disk, so they will survive a
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
550 * system crash.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
551 * MFS_ZERO Only write block 0.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
552 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
553 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
554 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
555 int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
556 mf_sync(mfp, flags)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
557 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
558 int flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
559 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
560 int status;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
561 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
562 #if defined(SYNC_DUP_CLOSE) && !defined(MSDOS)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
563 int fd;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
564 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
565 int got_int_save = got_int;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
566
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
567 if (mfp->mf_fd < 0) /* there is no file, nothing to do */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
568 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
569 mfp->mf_dirty = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
570 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
571 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
572
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
573 /* Only a CTRL-C while writing will break us here, not one typed
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
574 * previously. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
575 got_int = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
576
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
577 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
578 * sync from last to first (may reduce the probability of an inconsistent
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
579 * file) If a write fails, it is very likely caused by a full filesystem.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
580 * Then we only try to write blocks within the existing file. If that also
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
581 * fails then we give up.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
582 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
583 status = OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
584 for (hp = mfp->mf_used_last; hp != NULL; hp = hp->bh_prev)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
585 if (((flags & MFS_ALL) || hp->bh_bnum >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
586 && (hp->bh_flags & BH_DIRTY)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
587 && (status == OK || (hp->bh_bnum >= 0
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
588 && hp->bh_bnum < mfp->mf_infile_count)))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
589 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
590 if ((flags & MFS_ZERO) && hp->bh_bnum != 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
591 continue;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
592 if (mf_write(mfp, hp) == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
593 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
594 if (status == FAIL) /* double error: quit syncing */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
595 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
596 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
597 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
598 if (flags & MFS_STOP)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
599 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
600 /* Stop when char available now. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
601 if (ui_char_avail())
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
602 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
603 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
604 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
605 ui_breakcheck();
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
606 if (got_int)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
607 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
608 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
609
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
610 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
611 * If the whole list is flushed, the memfile is not dirty anymore.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
612 * In case of an error this flag is also set, to avoid trying all the time.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
613 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
614 if (hp == NULL || status == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
615 mfp->mf_dirty = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
616
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
617 if ((flags & MFS_FLUSH) && *p_sws != NUL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
618 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
619 #if defined(UNIX)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
620 # ifdef HAVE_FSYNC
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
621 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
622 * most Unixes have the very useful fsync() function, just what we need.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
623 * However, with OS/2 and EMX it is also available, but there are
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
624 * reports of bad problems with it (a bug in HPFS.IFS).
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
625 * So we disable use of it here in case someone tries to be smart
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
626 * and changes os_os2_cfg.h... (even though there is no __EMX__ test
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
627 * in the #if, as __EMX__ does not have sync(); we hope for a timely
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
628 * sync from the system itself).
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
629 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
630 # if defined(__EMX__)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
631 error "Dont use fsync with EMX! Read emxdoc.doc or emxfix01.doc for info."
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
632 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
633 if (STRCMP(p_sws, "fsync") == 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
634 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
635 if (fsync(mfp->mf_fd))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
636 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
637 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
638 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
639 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
640 /* OpenNT is strictly POSIX (Benzinger) */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
641 /* Tandem/Himalaya NSK-OSS doesn't have sync() */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
642 # if defined(__OPENNT) || defined(__TANDEM)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
643 fflush(NULL);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
644 # else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
645 sync();
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
646 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
647 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
648 #ifdef VMS
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
649 if (STRCMP(p_sws, "fsync") == 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
650 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
651 if (fsync(mfp->mf_fd))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
652 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
653 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
654 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
655 #ifdef MSDOS
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
656 if (_dos_commit(mfp->mf_fd))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
657 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
658 #else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
659 # ifdef SYNC_DUP_CLOSE
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
660 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
661 * Win32 is a bit more work: Duplicate the file handle and close it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
662 * This should flush the file to disk.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
663 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
664 if ((fd = dup(mfp->mf_fd)) >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
665 close(fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
666 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
667 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
668 #ifdef AMIGA
1030
d4bc24e6a281 updated for version 7.0-156
vimboss
parents: 984
diff changeset
669 # if defined(__AROS__) || defined(__amigaos4__)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
670 if (fsync(mfp->mf_fd) != 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
671 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
672 # else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
673 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
674 * Flush() only exists for AmigaDos 2.0.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
675 * For 1.3 it should be done with close() + open(), but then the risk
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
676 * is that the open() may fail and lose the file....
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
677 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
678 # ifdef FEAT_ARP
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
679 if (dos2)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
680 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
681 # ifdef SASC
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
682 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
683 struct UFB *fp = chkufb(mfp->mf_fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
684
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
685 if (fp != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
686 Flush(fp->ufbfh);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
687 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
688 # else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
689 # if defined(_DCC) || defined(__GNUC__) || defined(__MORPHOS__)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
690 {
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
691 # if defined(__GNUC__) && !defined(__MORPHOS__) && defined(__libnix__)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
692 /* Have function (in libnix at least),
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
693 * but ain't got no prototype anywhere. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
694 extern unsigned long fdtofh(int filedescriptor);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
695 # endif
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
696 # if !defined(__libnix__)
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
697 fflush(NULL);
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
698 # else
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
699 BPTR fh = (BPTR)fdtofh(mfp->mf_fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
700
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
701 if (fh != 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
702 Flush(fh);
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
703 # endif
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
704 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
705 # else /* assume Manx */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
706 Flush(_devtab[mfp->mf_fd].fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
707 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
708 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
709 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
710 #endif /* AMIGA */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
711 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
712
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
713 got_int |= got_int_save;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
714
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
715 return status;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
716 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
717
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
718 /*
630
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
719 * For all blocks in memory file *mfp that have a positive block number set
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
720 * the dirty flag. These are blocks that need to be written to a newly
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
721 * created swapfile.
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
722 */
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
723 void
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
724 mf_set_dirty(mfp)
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
725 memfile_T *mfp;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
726 {
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
727 bhdr_T *hp;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
728
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
729 for (hp = mfp->mf_used_last; hp != NULL; hp = hp->bh_prev)
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
730 if (hp->bh_bnum > 0)
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
731 hp->bh_flags |= BH_DIRTY;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
732 mfp->mf_dirty = TRUE;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
733 }
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
734
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
735 /*
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
736 * insert block *hp in front of hashlist of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
737 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
738 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
739 mf_ins_hash(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
740 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
741 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
742 {
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
743 mf_hash_add_item(&mfp->mf_hash, (mf_hashitem_T *)hp);
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
744 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
745
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
746 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
747 * remove block *hp from hashlist of memfile list *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
748 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
749 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
750 mf_rem_hash(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
751 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
752 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
753 {
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
754 mf_hash_rem_item(&mfp->mf_hash, (mf_hashitem_T *)hp);
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
755 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
756
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
757 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
758 * look in hash lists of memfile *mfp for block header with number 'nr'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
759 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
760 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
761 mf_find_hash(mfp, nr)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
762 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
763 blocknr_T nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
764 {
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
765 return (bhdr_T *)mf_hash_find(&mfp->mf_hash, nr);
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
766 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
767
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
768 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
769 * insert block *hp in front of used list of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
770 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
771 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
772 mf_ins_used(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
773 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
774 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
775 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
776 hp->bh_next = mfp->mf_used_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
777 mfp->mf_used_first = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
778 hp->bh_prev = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
779 if (hp->bh_next == NULL) /* list was empty, adjust last pointer */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
780 mfp->mf_used_last = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
781 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
782 hp->bh_next->bh_prev = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
783 mfp->mf_used_count += hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
784 total_mem_used += hp->bh_page_count * mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
785 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
786
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
787 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
788 * remove block *hp from used list of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
789 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
790 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
791 mf_rem_used(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
792 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
793 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
794 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
795 if (hp->bh_next == NULL) /* last block in used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
796 mfp->mf_used_last = hp->bh_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
797 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
798 hp->bh_next->bh_prev = hp->bh_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
799 if (hp->bh_prev == NULL) /* first block in used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
800 mfp->mf_used_first = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
801 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
802 hp->bh_prev->bh_next = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
803 mfp->mf_used_count -= hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
804 total_mem_used -= hp->bh_page_count * mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
805 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
806
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
807 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
808 * Release the least recently used block from the used list if the number
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
809 * of used memory blocks gets to big.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
810 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
811 * Return the block header to the caller, including the memory block, so
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
812 * it can be re-used. Make sure the page_count is right.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
813 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
814 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
815 mf_release(mfp, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
816 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
817 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
818 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
819 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
820 int need_release;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
821 buf_T *buf;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
822
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
823 /* don't release while in mf_close_file() */
1066
bffbbb566d6b updated for version 7.0-192
vimboss
parents: 1033
diff changeset
824 if (mf_dont_release)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
825 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
826
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
827 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
828 * Need to release a block if the number of blocks for this memfile is
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
829 * higher than the maximum or total memory used is over 'maxmemtot'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
830 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
831 need_release = ((mfp->mf_used_count >= mfp->mf_used_count_max)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
832 || (total_mem_used >> 10) >= (long_u)p_mmt);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
833
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
834 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
835 * Try to create a swap file if the amount of memory used is getting too
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
836 * high.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
837 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
838 if (mfp->mf_fd < 0 && need_release && p_uc)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
839 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
840 /* find for which buffer this memfile is */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
841 for (buf = firstbuf; buf != NULL; buf = buf->b_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
842 if (buf->b_ml.ml_mfp == mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
843 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
844 if (buf != NULL && buf->b_may_swap)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
845 ml_open_file(buf);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
846 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
847
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
848 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
849 * don't release a block if
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
850 * there is no file for this memfile
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
851 * or
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
852 * the number of blocks for this memfile is lower than the maximum
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
853 * and
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
854 * total memory used is not up to 'maxmemtot'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
855 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
856 if (mfp->mf_fd < 0 || !need_release)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
857 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
858
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
859 for (hp = mfp->mf_used_last; hp != NULL; hp = hp->bh_prev)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
860 if (!(hp->bh_flags & BH_LOCKED))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
861 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
862 if (hp == NULL) /* not a single one that can be released */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
863 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
864
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
865 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
866 * If the block is dirty, write it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
867 * If the write fails we don't free it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
868 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
869 if ((hp->bh_flags & BH_DIRTY) && mf_write(mfp, hp) == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
870 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
871
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
872 mf_rem_used(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
873 mf_rem_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
874
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
875 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
876 * If a bhdr_T is returned, make sure that the page_count of bh_data is
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
877 * right
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
878 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
879 if (hp->bh_page_count != page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
880 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
881 vim_free(hp->bh_data);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
882 if ((hp->bh_data = alloc(mfp->mf_page_size * page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
883 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
884 vim_free(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
885 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
886 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
887 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
888 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
889 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
890 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
891
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
892 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
893 * release as many blocks as possible
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
894 * Used in case of out of memory
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
895 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
896 * return TRUE if any memory was released
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
897 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
898 int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
899 mf_release_all()
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
900 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
901 buf_T *buf;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
902 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
903 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
904 int retval = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
905
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
906 for (buf = firstbuf; buf != NULL; buf = buf->b_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
907 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
908 mfp = buf->b_ml.ml_mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
909 if (mfp != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
910 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
911 /* If no swap file yet, may open one */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
912 if (mfp->mf_fd < 0 && buf->b_may_swap)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
913 ml_open_file(buf);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
914
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
915 /* only if there is a swapfile */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
916 if (mfp->mf_fd >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
917 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
918 for (hp = mfp->mf_used_last; hp != NULL; )
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
919 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
920 if (!(hp->bh_flags & BH_LOCKED)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
921 && (!(hp->bh_flags & BH_DIRTY)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
922 || mf_write(mfp, hp) != FAIL))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
923 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
924 mf_rem_used(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
925 mf_rem_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
926 mf_free_bhdr(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
927 hp = mfp->mf_used_last; /* re-start, list was changed */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
928 retval = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
929 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
930 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
931 hp = hp->bh_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
932 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
933 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
934 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
935 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
936 return retval;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
937 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
938
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
939 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
940 * Allocate a block header and a block of memory for it
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
941 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
942 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
943 mf_alloc_bhdr(mfp, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
944 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
945 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
946 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
947 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
948
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
949 if ((hp = (bhdr_T *)alloc((unsigned)sizeof(bhdr_T))) != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
950 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
951 if ((hp->bh_data = (char_u *)alloc(mfp->mf_page_size * page_count))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
952 == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
953 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
954 vim_free(hp); /* not enough memory */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
955 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
956 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
957 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
958 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
959 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
960 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
961
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
962 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
963 * Free a block header and the block of memory for it
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
964 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
965 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
966 mf_free_bhdr(hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
967 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
968 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
969 vim_free(hp->bh_data);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
970 vim_free(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
971 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
972
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
973 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
974 * insert entry *hp in the free list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
975 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
976 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
977 mf_ins_free(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
978 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
979 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
980 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
981 hp->bh_next = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
982 mfp->mf_free_first = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
983 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
984
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
985 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
986 * remove the first entry from the free list and return a pointer to it
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
987 * Note: caller must check that mfp->mf_free_first is not NULL!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
988 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
989 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
990 mf_rem_free(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
991 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
992 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
993 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
994
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
995 hp = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
996 mfp->mf_free_first = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
997 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
998 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
999
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1000 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1001 * read a block from disk
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1002 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1003 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1004 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1005 static int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1006 mf_read(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1007 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1008 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1009 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1010 off_t offset;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1011 unsigned page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1012 unsigned size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1013
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1014 if (mfp->mf_fd < 0) /* there is no file, can't read */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1015 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1016
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1017 page_size = mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1018 offset = (off_t)page_size * hp->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1019 size = page_size * hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1020 if (lseek(mfp->mf_fd, offset, SEEK_SET) != offset)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1021 {
1033
19ed3bfbe488 updated for version 7.0-159
vimboss
parents: 1030
diff changeset
1022 PERROR(_("E294: Seek error in swap file read"));
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1023 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1024 }
2664
033e7b49356c updated for version 7.3.083
Bram Moolenaar <bram@vim.org>
parents: 2267
diff changeset
1025 if ((unsigned)read_eintr(mfp->mf_fd, hp->bh_data, size) != size)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1026 {
1033
19ed3bfbe488 updated for version 7.0-159
vimboss
parents: 1030
diff changeset
1027 PERROR(_("E295: Read error in swap file"));
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1028 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1029 }
2267
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1030
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1031 #ifdef FEAT_CRYPT
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1032 /* Decrypt if 'key' is set and this is a data block. */
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1033 if (*mfp->mf_buffer->b_p_key != NUL)
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1034 ml_decrypt_data(mfp, hp->bh_data, offset, size);
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1035 #endif
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1036
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1037 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1038 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1039
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1040 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1041 * write a block to disk
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1042 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1043 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1044 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1045 static int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1046 mf_write(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1047 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1048 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1049 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1050 off_t offset; /* offset in the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1051 blocknr_T nr; /* block nr which is being written */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1052 bhdr_T *hp2;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1053 unsigned page_size; /* number of bytes in a page */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1054 unsigned page_count; /* number of pages written */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1055 unsigned size; /* number of bytes written */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1056
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1057 if (mfp->mf_fd < 0) /* there is no file, can't write */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1058 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1059
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1060 if (hp->bh_bnum < 0) /* must assign file block number */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1061 if (mf_trans_add(mfp, hp) == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1062 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1063
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1064 page_size = mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1065
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1066 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1067 * We don't want gaps in the file. Write the blocks in front of *hp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1068 * to extend the file.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1069 * If block 'mf_infile_count' is not in the hash list, it has been
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1070 * freed. Fill the space in the file with data from the current block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1071 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1072 for (;;)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1073 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1074 nr = hp->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1075 if (nr > mfp->mf_infile_count) /* beyond end of file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1076 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1077 nr = mfp->mf_infile_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1078 hp2 = mf_find_hash(mfp, nr); /* NULL catched below */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1079 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1080 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1081 hp2 = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1082
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1083 offset = (off_t)page_size * nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1084 if (lseek(mfp->mf_fd, offset, SEEK_SET) != offset)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1085 {
1033
19ed3bfbe488 updated for version 7.0-159
vimboss
parents: 1030
diff changeset
1086 PERROR(_("E296: Seek error in swap file write"));
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1087 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1088 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1089 if (hp2 == NULL) /* freed block, fill with dummy data */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1090 page_count = 1;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1091 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1092 page_count = hp2->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1093 size = page_size * page_count;
2267
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1094 if (mf_write_block(mfp, hp2 == NULL ? hp : hp2, offset, size) == FAIL)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1095 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1096 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1097 * Avoid repeating the error message, this mostly happens when the
1226
a49d06539452 updated for version 7.1b
vimboss
parents: 1166
diff changeset
1098 * disk is full. We give the message again only after a successful
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1099 * write or when hitting a key. We keep on trying, in case some
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1100 * space becomes available.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1101 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1102 if (!did_swapwrite_msg)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1103 EMSG(_("E297: Write error in swap file"));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1104 did_swapwrite_msg = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1105 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1106 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1107 did_swapwrite_msg = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1108 if (hp2 != NULL) /* written a non-dummy block */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1109 hp2->bh_flags &= ~BH_DIRTY;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1110 /* appended to the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1111 if (nr + (blocknr_T)page_count > mfp->mf_infile_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1112 mfp->mf_infile_count = nr + page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1113 if (nr == hp->bh_bnum) /* written the desired block */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1114 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1115 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1116 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1117 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1118
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1119 /*
2267
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1120 * Write block "hp" with data size "size" to file "mfp->mf_fd".
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1121 * Takes care of encryption.
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1122 * Return FAIL or OK.
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1123 */
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1124 static int
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1125 mf_write_block(mfp, hp, offset, size)
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1126 memfile_T *mfp;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1127 bhdr_T *hp;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1128 off_t offset UNUSED;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1129 unsigned size;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1130 {
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1131 char_u *data = hp->bh_data;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1132 int result = OK;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1133
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1134 #ifdef FEAT_CRYPT
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1135 /* Encrypt if 'key' is set and this is a data block. */
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1136 if (*mfp->mf_buffer->b_p_key != NUL)
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1137 {
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1138 data = ml_encrypt_data(mfp, data, offset, size);
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1139 if (data == NULL)
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1140 return FAIL;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1141 }
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1142 #endif
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1143
2664
033e7b49356c updated for version 7.3.083
Bram Moolenaar <bram@vim.org>
parents: 2267
diff changeset
1144 if ((unsigned)write_eintr(mfp->mf_fd, data, size) != size)
2267
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1145 result = FAIL;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1146
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1147 #ifdef FEAT_CRYPT
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1148 if (data != hp->bh_data)
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1149 vim_free(data);
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1150 #endif
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1151
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1152 return result;
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1153 }
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1154
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1155 /*
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1156 * Make block number for *hp positive and add it to the translation list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1157 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1158 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1159 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1160 static int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1161 mf_trans_add(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1162 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1163 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1164 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1165 bhdr_T *freep;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1166 blocknr_T new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1167 NR_TRANS *np;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1168 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1169
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1170 if (hp->bh_bnum >= 0) /* it's already positive */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1171 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1172
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1173 if ((np = (NR_TRANS *)alloc((unsigned)sizeof(NR_TRANS))) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1174 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1175
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1176 /*
2267
c08f91142c41 Crypt the swapfile.
Bram Moolenaar <bram@vim.org>
parents: 2249
diff changeset
1177 * Get a new number for the block.
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1178 * If the first item in the free list has sufficient pages, use its number
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1179 * Otherwise use mf_blocknr_max.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1180 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1181 freep = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1182 page_count = hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1183 if (freep != NULL && freep->bh_page_count >= page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1184 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1185 new_bnum = freep->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1186 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1187 * If the page count of the free block was larger, recude it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1188 * If the page count matches, remove the block from the free list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1189 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1190 if (freep->bh_page_count > page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1191 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1192 freep->bh_bnum += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1193 freep->bh_page_count -= page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1194 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1195 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1196 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1197 freep = mf_rem_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1198 vim_free(freep);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1199 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1200 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1201 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1202 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1203 new_bnum = mfp->mf_blocknr_max;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1204 mfp->mf_blocknr_max += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1205 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1206
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1207 np->nt_old_bnum = hp->bh_bnum; /* adjust number */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1208 np->nt_new_bnum = new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1209
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1210 mf_rem_hash(mfp, hp); /* remove from old hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1211 hp->bh_bnum = new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1212 mf_ins_hash(mfp, hp); /* insert in new hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1213
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1214 /* Insert "np" into "mf_trans" hashtable with key "np->nt_old_bnum" */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1215 mf_hash_add_item(&mfp->mf_trans, (mf_hashitem_T *)np);
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1216
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1217 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1218 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1219
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1220 /*
1226
a49d06539452 updated for version 7.1b
vimboss
parents: 1166
diff changeset
1221 * Lookup a translation from the trans lists and delete the entry
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1222 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1223 * Return the positive new number when found, the old number when not found
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1224 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1225 blocknr_T
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1226 mf_trans_del(mfp, old_nr)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1227 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1228 blocknr_T old_nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1229 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1230 NR_TRANS *np;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1231 blocknr_T new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1232
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1233 np = (NR_TRANS *)mf_hash_find(&mfp->mf_trans, old_nr);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1234
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1235 if (np == NULL) /* not found */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1236 return old_nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1237
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1238 mfp->mf_neg_count--;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1239 new_bnum = np->nt_new_bnum;
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1240
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1241 /* remove entry from the trans list */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1242 mf_hash_rem_item(&mfp->mf_trans, (mf_hashitem_T *)np);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1243
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1244 vim_free(np);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1245
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1246 return new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1247 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1248
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1249 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1250 * Set mfp->mf_ffname according to mfp->mf_fname and some other things.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1251 * Only called when creating or renaming the swapfile. Either way it's a new
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1252 * name so we must work out the full path name.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1253 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1254 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1255 mf_set_ffname(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1256 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1257 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1258 mfp->mf_ffname = FullName_save(mfp->mf_fname, FALSE);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1259 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1260
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1261 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1262 * Make the name of the file used for the memfile a full path.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1263 * Used before doing a :cd
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1264 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1265 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1266 mf_fullname(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1267 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1268 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1269 if (mfp != NULL && mfp->mf_fname != NULL && mfp->mf_ffname != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1270 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1271 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1272 mfp->mf_fname = mfp->mf_ffname;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1273 mfp->mf_ffname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1274 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1275 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1276
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1277 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1278 * return TRUE if there are any translations pending for 'mfp'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1279 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1280 int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1281 mf_need_trans(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1282 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1283 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1284 return (mfp->mf_fname != NULL && mfp->mf_neg_count > 0);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1285 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1286
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1287 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1288 * Open a swap file for a memfile.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1289 * The "fname" must be in allocated memory, and is consumed (also when an
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1290 * error occurs).
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1291 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1292 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1293 mf_do_open(mfp, fname, flags)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1294 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1295 char_u *fname;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1296 int flags; /* flags for open() */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1297 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1298 #ifdef HAVE_LSTAT
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1299 struct stat sb;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1300 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1301
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1302 mfp->mf_fname = fname;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1303
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1304 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1305 * Get the full path name before the open, because this is
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1306 * not possible after the open on the Amiga.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1307 * fname cannot be NameBuff, because it must have been allocated.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1308 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1309 mf_set_ffname(mfp);
2823
8bd38abda314 updated for version 7.3.187
Bram Moolenaar <bram@vim.org>
parents: 2730
diff changeset
1310 #if defined(MSDOS) || defined(MSWIN)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1311 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1312 * A ":!cd e:xxx" may change the directory without us knowning, use the
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1313 * full pathname always. Careful: This frees fname!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1314 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1315 mf_fullname(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1316 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1317
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1318 #ifdef HAVE_LSTAT
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1319 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1320 * Extra security check: When creating a swap file it really shouldn't
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1321 * exist yet. If there is a symbolic link, this is most likely an attack.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1322 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1323 if ((flags & O_CREAT) && mch_lstat((char *)mfp->mf_fname, &sb) >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1324 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1325 mfp->mf_fd = -1;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1326 EMSG(_("E300: Swap file already exists (symlink attack?)"));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1327 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1328 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1329 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1330 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1331 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1332 * try to open the file
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1333 */
557
862863033fdd updated for version 7.0158
vimboss
parents: 7
diff changeset
1334 flags |= O_EXTRA | O_NOFOLLOW;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1335 #ifdef WIN32
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1336 /* Prevent handle inheritance that cause problems with Cscope
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1337 * (swap file may not be deleted if cscope connection was open after
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1338 * the file) */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1339 flags |= O_NOINHERIT;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1340 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1341 mfp->mf_fd = mch_open_rw((char *)mfp->mf_fname, flags);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1342 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1343
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1344 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1345 * If the file cannot be opened, use memory only
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1346 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1347 if (mfp->mf_fd < 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1348 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1349 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1350 vim_free(mfp->mf_ffname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1351 mfp->mf_fname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1352 mfp->mf_ffname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1353 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1354 else
1583
ebe059f69b9e updated for version 7.1-296
vimboss
parents: 1230
diff changeset
1355 {
2003
5d5cad78a838 updated for version 7.2-300
vimboss
parents: 1668
diff changeset
1356 #ifdef HAVE_FD_CLOEXEC
5d5cad78a838 updated for version 7.2-300
vimboss
parents: 1668
diff changeset
1357 int fdflags = fcntl(mfp->mf_fd, F_GETFD);
5d5cad78a838 updated for version 7.2-300
vimboss
parents: 1668
diff changeset
1358 if (fdflags >= 0 && (fdflags & FD_CLOEXEC) == 0)
5d5cad78a838 updated for version 7.2-300
vimboss
parents: 1668
diff changeset
1359 fcntl(mfp->mf_fd, F_SETFD, fdflags | FD_CLOEXEC);
5d5cad78a838 updated for version 7.2-300
vimboss
parents: 1668
diff changeset
1360 #endif
1583
ebe059f69b9e updated for version 7.1-296
vimboss
parents: 1230
diff changeset
1361 #ifdef HAVE_SELINUX
ebe059f69b9e updated for version 7.1-296
vimboss
parents: 1230
diff changeset
1362 mch_copy_sec(fname, mfp->mf_fname);
ebe059f69b9e updated for version 7.1-296
vimboss
parents: 1230
diff changeset
1363 #endif
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1364 mch_hide(mfp->mf_fname); /* try setting the 'hidden' flag */
1583
ebe059f69b9e updated for version 7.1-296
vimboss
parents: 1230
diff changeset
1365 }
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1366 }
2730
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1367
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1368 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1369 * Implementation of mf_hashtab_T follows.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1370 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1371
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1372 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1373 * The number of buckets in the hashtable is increased by a factor of
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1374 * MHT_GROWTH_FACTOR when the average number of items per bucket
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1375 * exceeds 2 ^ MHT_LOG_LOAD_FACTOR.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1376 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1377 #define MHT_LOG_LOAD_FACTOR 6
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1378 #define MHT_GROWTH_FACTOR 2 /* must be a power of two */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1379
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1380 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1381 * Initialize an empty hash table.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1382 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1383 static void
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1384 mf_hash_init(mht)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1385 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1386 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1387 vim_memset(mht, 0, sizeof(mf_hashtab_T));
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1388 mht->mht_buckets = mht->mht_small_buckets;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1389 mht->mht_mask = MHT_INIT_SIZE - 1;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1390 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1391
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1392 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1393 * Free the array of a hash table. Does not free the items it contains!
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1394 * The hash table must not be used again without another mf_hash_init() call.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1395 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1396 static void
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1397 mf_hash_free(mht)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1398 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1399 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1400 if (mht->mht_buckets != mht->mht_small_buckets)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1401 vim_free(mht->mht_buckets);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1402 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1403
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1404 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1405 * Free the array of a hash table and all the items it contains.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1406 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1407 static void
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1408 mf_hash_free_all(mht)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1409 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1410 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1411 long_u idx;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1412 mf_hashitem_T *mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1413 mf_hashitem_T *next;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1414
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1415 for (idx = 0; idx <= mht->mht_mask; idx++)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1416 for (mhi = mht->mht_buckets[idx]; mhi != NULL; mhi = next)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1417 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1418 next = mhi->mhi_next;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1419 vim_free(mhi);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1420 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1421
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1422 mf_hash_free(mht);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1423 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1424
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1425 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1426 * Find "key" in hashtable "mht".
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1427 * Returns a pointer to a mf_hashitem_T or NULL if the item was not found.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1428 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1429 static mf_hashitem_T *
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1430 mf_hash_find(mht, key)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1431 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1432 blocknr_T key;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1433 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1434 mf_hashitem_T *mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1435
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1436 mhi = mht->mht_buckets[key & mht->mht_mask];
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1437 while (mhi != NULL && mhi->mhi_key != key)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1438 mhi = mhi->mhi_next;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1439
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1440 return mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1441 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1442
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1443 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1444 * Add item "mhi" to hashtable "mht".
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1445 * "mhi" must not be NULL.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1446 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1447 static void
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1448 mf_hash_add_item(mht, mhi)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1449 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1450 mf_hashitem_T *mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1451 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1452 long_u idx;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1453
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1454 idx = mhi->mhi_key & mht->mht_mask;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1455 mhi->mhi_next = mht->mht_buckets[idx];
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1456 mhi->mhi_prev = NULL;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1457 if (mhi->mhi_next != NULL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1458 mhi->mhi_next->mhi_prev = mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1459 mht->mht_buckets[idx] = mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1460
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1461 mht->mht_count++;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1462
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1463 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1464 * Grow hashtable when we have more thank 2^MHT_LOG_LOAD_FACTOR
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1465 * items per bucket on average
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1466 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1467 if (mht->mht_fixed == 0
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1468 && (mht->mht_count >> MHT_LOG_LOAD_FACTOR) > mht->mht_mask)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1469 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1470 if (mf_hash_grow(mht) == FAIL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1471 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1472 /* stop trying to grow after first failure to allocate memory */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1473 mht->mht_fixed = 1;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1474 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1475 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1476 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1477
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1478 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1479 * Remove item "mhi" from hashtable "mht".
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1480 * "mhi" must not be NULL and must have been inserted into "mht".
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1481 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1482 static void
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1483 mf_hash_rem_item(mht, mhi)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1484 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1485 mf_hashitem_T *mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1486 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1487 if (mhi->mhi_prev == NULL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1488 mht->mht_buckets[mhi->mhi_key & mht->mht_mask] = mhi->mhi_next;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1489 else
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1490 mhi->mhi_prev->mhi_next = mhi->mhi_next;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1491
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1492 if (mhi->mhi_next != NULL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1493 mhi->mhi_next->mhi_prev = mhi->mhi_prev;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1494
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1495 mht->mht_count--;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1496
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1497 /* We could shrink the table here, but it typically takes little memory,
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1498 * so why bother? */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1499 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1500
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1501 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1502 * Increase number of buckets in the hashtable by MHT_GROWTH_FACTOR and
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1503 * rehash items.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1504 * Returns FAIL when out of memory.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1505 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1506 static int
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1507 mf_hash_grow(mht)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1508 mf_hashtab_T *mht;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1509 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1510 long_u i, j;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1511 int shift;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1512 mf_hashitem_T *mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1513 mf_hashitem_T *tails[MHT_GROWTH_FACTOR];
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1514 mf_hashitem_T **buckets;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1515 size_t size;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1516
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1517 size = (mht->mht_mask + 1) * MHT_GROWTH_FACTOR * sizeof(void *);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1518 buckets = (mf_hashitem_T **)lalloc_clear(size, FALSE);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1519 if (buckets == NULL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1520 return FAIL;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1521
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1522 shift = 0;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1523 while ((mht->mht_mask >> shift) != 0)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1524 shift++;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1525
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1526 for (i = 0; i <= mht->mht_mask; i++)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1527 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1528 /*
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1529 * Traverse the items in the i-th original bucket and move them into
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1530 * MHT_GROWTH_FACTOR new buckets, preserving their relative order
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1531 * within each new bucket. Preserving the order is important because
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1532 * mf_get() tries to keep most recently used items at the front of
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1533 * each bucket.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1534 *
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1535 * Here we strongly rely on the fact the hashes are computed modulo
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1536 * a power of two.
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1537 */
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1538
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1539 vim_memset(tails, 0, sizeof(tails));
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1540
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1541 for (mhi = mht->mht_buckets[i]; mhi != NULL; mhi = mhi->mhi_next)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1542 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1543 j = (mhi->mhi_key >> shift) & (MHT_GROWTH_FACTOR - 1);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1544 if (tails[j] == NULL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1545 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1546 buckets[i + (j << shift)] = mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1547 tails[j] = mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1548 mhi->mhi_prev = NULL;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1549 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1550 else
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1551 {
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1552 tails[j]->mhi_next = mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1553 mhi->mhi_prev = tails[j];
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1554 tails[j] = mhi;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1555 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1556 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1557
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1558 for (j = 0; j < MHT_GROWTH_FACTOR; j++)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1559 if (tails[j] != NULL)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1560 tails[j]->mhi_next = NULL;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1561 }
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1562
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1563 if (mht->mht_buckets != mht->mht_small_buckets)
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1564 vim_free(mht->mht_buckets);
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1565
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1566 mht->mht_buckets = buckets;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1567 mht->mht_mask = (mht->mht_mask + 1) * MHT_GROWTH_FACTOR - 1;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1568
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1569 return OK;
e0a90042318d updated for version 7.3.143
Bram Moolenaar <bram@vim.org>
parents: 2666
diff changeset
1570 }