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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 * undo.c: multi level undo facility
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12 *
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13 * The saved lines are stored in a list of lists (one for each buffer):
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14 *
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15 * b_u_oldhead------------------------------------------------+
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16 * |
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17 * V
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18 * +--------------+ +--------------+ +--------------+
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19 * b_u_newhead--->| u_header | | u_header | | u_header |
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20 * | uh_next------>| uh_next------>| uh_next---->NULL
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21 * NULL<--------uh_prev |<---------uh_prev |<---------uh_prev |
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22 * | uh_entry | | uh_entry | | uh_entry |
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23 * +--------|-----+ +--------|-----+ +--------|-----+
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24 * | | |
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25 * V V V
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26 * +--------------+ +--------------+ +--------------+
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27 * | u_entry | | u_entry | | u_entry |
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28 * | ue_next | | ue_next | | ue_next |
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29 * +--------|-----+ +--------|-----+ +--------|-----+
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30 * | | |
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31 * V V V
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32 * +--------------+ NULL NULL
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33 * | u_entry |
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34 * | ue_next |
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35 * +--------|-----+
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36 * |
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37 * V
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38 * etc.
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39 *
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40 * Each u_entry list contains the information for one undo or redo.
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41 * curbuf->b_u_curhead points to the header of the last undo (the next redo),
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758
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42 * or is NULL if nothing has been undone (end of the branch).
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7
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43 *
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753
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44 * For keeping alternate undo/redo branches the uh_alt field is used. Thus at
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45 * each point in the list a branch may appear for an alternate to redo. The
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46 * uh_seq field is numbered sequentially to be able to find a newer or older
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47 * branch.
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48 *
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758
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49 * +---------------+ +---------------+
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50 * b_u_oldhead --->| u_header | | u_header |
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51 * | uh_alt_next ---->| uh_alt_next ----> NULL
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52 * NULL <----- uh_alt_prev |<------ uh_alt_prev |
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53 * | uh_prev | | uh_prev |
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54 * +-----|---------+ +-----|---------+
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55 * | |
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56 * V V
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57 * +---------------+ +---------------+
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58 * | u_header | | u_header |
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59 * | uh_alt_next | | uh_alt_next |
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60 * b_u_newhead --->| uh_alt_prev | | uh_alt_prev |
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61 * | uh_prev | | uh_prev |
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62 * +-----|---------+ +-----|---------+
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63 * | |
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64 * V V
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65 * NULL +---------------+ +---------------+
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66 * | u_header | | u_header |
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67 * | uh_alt_next ---->| uh_alt_next |
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68 * | uh_alt_prev |<------ uh_alt_prev |
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69 * | uh_prev | | uh_prev |
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70 * +-----|---------+ +-----|---------+
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71 * | |
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72 * etc. etc.
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73 *
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74 *
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168
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75 * All data is allocated with U_ALLOC_LINE(), it will be freed as soon as the
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76 * buffer is unloaded.
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7
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77 */
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78
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79 #include "vim.h"
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80
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168
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81 /* See below: use malloc()/free() for memory management. */
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82 #define U_USE_MALLOC 1
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83
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758
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84 static void u_unch_branch __ARGS((u_header_T *uhp));
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7
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85 static u_entry_T *u_get_headentry __ARGS((void));
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86 static void u_getbot __ARGS((void));
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87 static int u_savecommon __ARGS((linenr_T, linenr_T, linenr_T));
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88 static void u_doit __ARGS((int count));
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777
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89 static void u_undoredo __ARGS((int undo));
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798
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90 static void u_undo_end __ARGS((int did_undo, int absolute));
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772
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91 static void u_add_time __ARGS((char_u *buf, size_t buflen, time_t tt));
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758
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92 static void u_freeheader __ARGS((buf_T *buf, u_header_T *uhp, u_header_T **uhpp));
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753
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93 static void u_freebranch __ARGS((buf_T *buf, u_header_T *uhp, u_header_T **uhpp));
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94 static void u_freeentries __ARGS((buf_T *buf, u_header_T *uhp, u_header_T **uhpp));
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7
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95 static void u_freeentry __ARGS((u_entry_T *, long));
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96
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168
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97 #ifdef U_USE_MALLOC
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98 # define U_FREE_LINE(ptr) vim_free(ptr)
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99 # define U_ALLOC_LINE(size) lalloc((long_u)((size) + 1), FALSE)
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100 #else
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101 static void u_free_line __ARGS((char_u *ptr, int keep));
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102 static char_u *u_alloc_line __ARGS((unsigned size));
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103 # define U_FREE_LINE(ptr) u_free_line((ptr), FALSE)
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104 # define U_ALLOC_LINE(size) u_alloc_line(size)
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105 #endif
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7
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106 static char_u *u_save_line __ARGS((linenr_T));
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107
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108 static long u_newcount, u_oldcount;
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109
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110 /*
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111 * When 'u' flag included in 'cpoptions', we behave like vi. Need to remember
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112 * the action that "u" should do.
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113 */
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114 static int undo_undoes = FALSE;
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115
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116 /*
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344
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117 * Save the current line for both the "u" and "U" command.
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118 * Returns OK or FAIL.
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7
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119 */
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120 int
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121 u_save_cursor()
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122 {
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123 return (u_save((linenr_T)(curwin->w_cursor.lnum - 1),
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124 (linenr_T)(curwin->w_cursor.lnum + 1)));
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125 }
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126
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127 /*
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128 * Save the lines between "top" and "bot" for both the "u" and "U" command.
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129 * "top" may be 0 and bot may be curbuf->b_ml.ml_line_count + 1.
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130 * Returns FAIL when lines could not be saved, OK otherwise.
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131 */
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132 int
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133 u_save(top, bot)
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134 linenr_T top, bot;
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135 {
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136 if (undo_off)
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137 return OK;
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138
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139 if (top > curbuf->b_ml.ml_line_count ||
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140 top >= bot || bot > curbuf->b_ml.ml_line_count + 1)
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141 return FALSE; /* rely on caller to do error messages */
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142
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143 if (top + 2 == bot)
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144 u_saveline((linenr_T)(top + 1));
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145
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146 return (u_savecommon(top, bot, (linenr_T)0));
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147 }
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148
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149 /*
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150 * save the line "lnum" (used by ":s" and "~" command)
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151 * The line is replaced, so the new bottom line is lnum + 1.
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152 */
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153 int
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154 u_savesub(lnum)
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155 linenr_T lnum;
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156 {
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157 if (undo_off)
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158 return OK;
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159
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160 return (u_savecommon(lnum - 1, lnum + 1, lnum + 1));
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161 }
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162
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163 /*
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164 * a new line is inserted before line "lnum" (used by :s command)
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165 * The line is inserted, so the new bottom line is lnum + 1.
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166 */
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167 int
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168 u_inssub(lnum)
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169 linenr_T lnum;
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170 {
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171 if (undo_off)
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172 return OK;
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173
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174 return (u_savecommon(lnum - 1, lnum, lnum + 1));
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175 }
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176
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177 /*
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178 * save the lines "lnum" - "lnum" + nlines (used by delete command)
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179 * The lines are deleted, so the new bottom line is lnum, unless the buffer
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180 * becomes empty.
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181 */
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182 int
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183 u_savedel(lnum, nlines)
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184 linenr_T lnum;
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185 long nlines;
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186 {
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187 if (undo_off)
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188 return OK;
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189
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190 return (u_savecommon(lnum - 1, lnum + nlines,
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191 nlines == curbuf->b_ml.ml_line_count ? 2 : lnum));
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192 }
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193
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632
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194 /*
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195 * Return TRUE when undo is allowed. Otherwise give an error message and
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196 * return FALSE.
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197 */
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912
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198 int
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632
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199 undo_allowed()
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200 {
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201 /* Don't allow changes when 'modifiable' is off. */
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202 if (!curbuf->b_p_ma)
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203 {
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204 EMSG(_(e_modifiable));
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205 return FALSE;
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206 }
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207
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208 #ifdef HAVE_SANDBOX
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209 /* In the sandbox it's not allowed to change the text. */
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210 if (sandbox != 0)
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211 {
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212 EMSG(_(e_sandbox));
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213 return FALSE;
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214 }
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215 #endif
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216
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217 /* Don't allow changes in the buffer while editing the cmdline. The
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218 * caller of getcmdline() may get confused. */
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634
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219 if (textlock != 0)
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632
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220 {
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221 EMSG(_(e_secure));
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222 return FALSE;
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223 }
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224
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225 return TRUE;
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226 }
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227
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7
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228 static int
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229 u_savecommon(top, bot, newbot)
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230 linenr_T top, bot;
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231 linenr_T newbot;
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232 {
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753
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233 linenr_T lnum;
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234 long i;
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235 u_header_T *uhp;
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236 u_header_T *old_curhead;
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237 u_entry_T *uep;
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238 u_entry_T *prev_uep;
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239 long size;
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7
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240
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632
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241 /* When making changes is not allowed return FAIL. It's a crude way to
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242 * make all change commands fail. */
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243 if (!undo_allowed())
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7
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244 return FAIL;
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245
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246 #ifdef FEAT_NETBEANS_INTG
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247 /*
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248 * Netbeans defines areas that cannot be modified. Bail out here when
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249 * trying to change text in a guarded area.
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250 */
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33
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251 if (usingNetbeans)
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7
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252 {
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33
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253 if (netbeans_is_guarded(top, bot))
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254 {
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255 EMSG(_(e_guarded));
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256 return FAIL;
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257 }
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258 if (curbuf->b_p_ro)
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259 {
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260 EMSG(_(e_nbreadonly));
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261 return FAIL;
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262 }
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7
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263 }
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264 #endif
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265
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266 #ifdef FEAT_AUTOCMD
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267 /*
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268 * Saving text for undo means we are going to make a change. Give a
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269 * warning for a read-only file before making the change, so that the
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270 * FileChangedRO event can replace the buffer with a read-write version
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271 * (e.g., obtained from a source control system).
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272 */
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273 change_warning(0);
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274 #endif
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275
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276 size = bot - top - 1;
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277
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278 /*
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279 * if curbuf->b_u_synced == TRUE make a new header
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280 */
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281 if (curbuf->b_u_synced)
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282 {
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283 #ifdef FEAT_JUMPLIST
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284 /* Need to create new entry in b_changelist. */
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285 curbuf->b_new_change = TRUE;
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286 #endif
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287
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753
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288 if (p_ul >= 0)
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289 {
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290 /*
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291 * Make a new header entry. Do this first so that we don't mess
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292 * up the undo info when out of memory.
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293 */
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294 uhp = (u_header_T *)U_ALLOC_LINE((unsigned)sizeof(u_header_T));
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295 if (uhp == NULL)
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296 goto nomem;
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297 }
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766
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298 else
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299 uhp = NULL;
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753
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300
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7
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301 /*
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758
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302 * If we undid more than we redid, move the entry lists before and
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303 * including curbuf->b_u_curhead to an alternate branch.
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7
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304 */
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753
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305 old_curhead = curbuf->b_u_curhead;
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306 if (old_curhead != NULL)
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307 {
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308 curbuf->b_u_newhead = old_curhead->uh_next;
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309 curbuf->b_u_curhead = NULL;
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310 }
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7
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311
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312 /*
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313 * free headers to keep the size right
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314 */
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315 while (curbuf->b_u_numhead > p_ul && curbuf->b_u_oldhead != NULL)
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753
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316 {
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758
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317 u_header_T *uhfree = curbuf->b_u_oldhead;
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753
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318
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319 /* If there is no branch only free one header. */
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758
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320 if (uhfree->uh_alt_next == NULL)
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321 u_freeheader(curbuf, uhfree, &old_curhead);
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753
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322 else
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323 {
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324 /* Free the oldest alternate branch as a whole. */
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758
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325 while (uhfree->uh_alt_next != NULL)
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326 uhfree = uhfree->uh_alt_next;
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327 u_freebranch(curbuf, uhfree, &old_curhead);
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753
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328 }
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329 }
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7
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330
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766
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331 if (uhp == NULL) /* no undo at all */
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7
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332 {
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753
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333 if (old_curhead != NULL)
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334 u_freebranch(curbuf, old_curhead, NULL);
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7
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335 curbuf->b_u_synced = FALSE;
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336 return OK;
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337 }
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338
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339 uhp->uh_prev = NULL;
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340 uhp->uh_next = curbuf->b_u_newhead;
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753
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341 uhp->uh_alt_next = old_curhead;
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342 if (old_curhead != NULL)
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343 {
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1056
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344 uhp->uh_alt_prev = old_curhead->uh_alt_prev;
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345 if (uhp->uh_alt_prev != NULL)
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346 uhp->uh_alt_prev->uh_alt_next = uhp;
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753
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347 old_curhead->uh_alt_prev = uhp;
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348 if (curbuf->b_u_oldhead == old_curhead)
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349 curbuf->b_u_oldhead = uhp;
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350 }
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1056
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351 else
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352 uhp->uh_alt_prev = NULL;
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758
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353 if (curbuf->b_u_newhead != NULL)
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354 curbuf->b_u_newhead->uh_prev = uhp;
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355
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777
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356 uhp->uh_seq = ++curbuf->b_u_seq_last;
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357 curbuf->b_u_seq_cur = uhp->uh_seq;
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758
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358 uhp->uh_time = time(NULL);
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359 curbuf->b_u_seq_time = uhp->uh_time + 1;
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360
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|
753
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361 uhp->uh_walk = 0;
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7
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362 uhp->uh_entry = NULL;
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363 uhp->uh_getbot_entry = NULL;
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364 uhp->uh_cursor = curwin->w_cursor; /* save cursor pos. for undo */
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365 #ifdef FEAT_VIRTUALEDIT
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366 if (virtual_active() && curwin->w_cursor.coladd > 0)
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367 uhp->uh_cursor_vcol = getviscol();
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368 else
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369 uhp->uh_cursor_vcol = -1;
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370 #endif
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371
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|
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372 /* save changed and buffer empty flag for undo */
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373 uhp->uh_flags = (curbuf->b_changed ? UH_CHANGED : 0) +
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374 ((curbuf->b_ml.ml_flags & ML_EMPTY) ? UH_EMPTYBUF : 0);
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375
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692
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376 /* save named marks and Visual marks for undo */
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7
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377 mch_memmove(uhp->uh_namedm, curbuf->b_namedm, sizeof(pos_T) * NMARKS);
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|
692
|
378 #ifdef FEAT_VISUAL
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|
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379 uhp->uh_visual = curbuf->b_visual;
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380 #endif
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381
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7
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382 curbuf->b_u_newhead = uhp;
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383 if (curbuf->b_u_oldhead == NULL)
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384 curbuf->b_u_oldhead = uhp;
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385 ++curbuf->b_u_numhead;
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386 }
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387 else
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388 {
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389 if (p_ul < 0) /* no undo at all */
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390 return OK;
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391
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|
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392 /*
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|
|
393 * When saving a single line, and it has been saved just before, it
|
|
|
394 * doesn't make sense saving it again. Saves a lot of memory when
|
|
|
395 * making lots of changes inside the same line.
|
|
|
396 * This is only possible if the previous change didn't increase or
|
|
|
397 * decrease the number of lines.
|
|
|
398 * Check the ten last changes. More doesn't make sense and takes too
|
|
|
399 * long.
|
|
|
400 */
|
|
|
401 if (size == 1)
|
|
|
402 {
|
|
|
403 uep = u_get_headentry();
|
|
|
404 prev_uep = NULL;
|
|
|
405 for (i = 0; i < 10; ++i)
|
|
|
406 {
|
|
|
407 if (uep == NULL)
|
|
|
408 break;
|
|
|
409
|
|
|
410 /* If lines have been inserted/deleted we give up.
|
|
|
411 * Also when the line was included in a multi-line save. */
|
|
|
412 if ((curbuf->b_u_newhead->uh_getbot_entry != uep
|
|
|
413 ? (uep->ue_top + uep->ue_size + 1
|
|
|
414 != (uep->ue_bot == 0
|
|
|
415 ? curbuf->b_ml.ml_line_count + 1
|
|
|
416 : uep->ue_bot))
|
|
|
417 : uep->ue_lcount != curbuf->b_ml.ml_line_count)
|
|
|
418 || (uep->ue_size > 1
|
|
|
419 && top >= uep->ue_top
|
|
|
420 && top + 2 <= uep->ue_top + uep->ue_size + 1))
|
|
|
421 break;
|
|
|
422
|
|
|
423 /* If it's the same line we can skip saving it again. */
|
|
|
424 if (uep->ue_size == 1 && uep->ue_top == top)
|
|
|
425 {
|
|
|
426 if (i > 0)
|
|
|
427 {
|
|
|
428 /* It's not the last entry: get ue_bot for the last
|
|
|
429 * entry now. Following deleted/inserted lines go to
|
|
|
430 * the re-used entry. */
|
|
|
431 u_getbot();
|
|
|
432 curbuf->b_u_synced = FALSE;
|
|
|
433
|
|
|
434 /* Move the found entry to become the last entry. The
|
|
|
435 * order of undo/redo doesn't matter for the entries
|
|
|
436 * we move it over, since they don't change the line
|
|
|
437 * count and don't include this line. It does matter
|
|
|
438 * for the found entry if the line count is changed by
|
|
|
439 * the executed command. */
|
|
|
440 prev_uep->ue_next = uep->ue_next;
|
|
|
441 uep->ue_next = curbuf->b_u_newhead->uh_entry;
|
|
|
442 curbuf->b_u_newhead->uh_entry = uep;
|
|
|
443 }
|
|
|
444
|
|
|
445 /* The executed command may change the line count. */
|
|
|
446 if (newbot != 0)
|
|
|
447 uep->ue_bot = newbot;
|
|
|
448 else if (bot > curbuf->b_ml.ml_line_count)
|
|
|
449 uep->ue_bot = 0;
|
|
|
450 else
|
|
|
451 {
|
|
|
452 uep->ue_lcount = curbuf->b_ml.ml_line_count;
|
|
|
453 curbuf->b_u_newhead->uh_getbot_entry = uep;
|
|
|
454 }
|
|
|
455 return OK;
|
|
|
456 }
|
|
|
457 prev_uep = uep;
|
|
|
458 uep = uep->ue_next;
|
|
|
459 }
|
|
|
460 }
|
|
|
461
|
|
|
462 /* find line number for ue_bot for previous u_save() */
|
|
|
463 u_getbot();
|
|
|
464 }
|
|
|
465
|
|
|
466 #if !defined(UNIX) && !defined(DJGPP) && !defined(WIN32) && !defined(__EMX__)
|
|
|
467 /*
|
|
|
468 * With Amiga and MSDOS 16 bit we can't handle big undo's, because
|
|
|
469 * then u_alloc_line would have to allocate a block larger than 32K
|
|
|
470 */
|
|
|
471 if (size >= 8000)
|
|
|
472 goto nomem;
|
|
|
473 #endif
|
|
|
474
|
|
|
475 /*
|
|
|
476 * add lines in front of entry list
|
|
|
477 */
|
|
168
|
478 uep = (u_entry_T *)U_ALLOC_LINE((unsigned)sizeof(u_entry_T));
|
|
7
|
479 if (uep == NULL)
|
|
|
480 goto nomem;
|
|
|
481
|
|
|
482 uep->ue_size = size;
|
|
|
483 uep->ue_top = top;
|
|
|
484 if (newbot != 0)
|
|
|
485 uep->ue_bot = newbot;
|
|
|
486 /*
|
|
|
487 * Use 0 for ue_bot if bot is below last line.
|
|
|
488 * Otherwise we have to compute ue_bot later.
|
|
|
489 */
|
|
|
490 else if (bot > curbuf->b_ml.ml_line_count)
|
|
|
491 uep->ue_bot = 0;
|
|
|
492 else
|
|
|
493 {
|
|
|
494 uep->ue_lcount = curbuf->b_ml.ml_line_count;
|
|
|
495 curbuf->b_u_newhead->uh_getbot_entry = uep;
|
|
|
496 }
|
|
|
497
|
|
168
|
498 if (size > 0)
|
|
7
|
499 {
|
|
168
|
500 if ((uep->ue_array = (char_u **)U_ALLOC_LINE(
|
|
7
|
501 (unsigned)(sizeof(char_u *) * size))) == NULL)
|
|
|
502 {
|
|
|
503 u_freeentry(uep, 0L);
|
|
|
504 goto nomem;
|
|
|
505 }
|
|
|
506 for (i = 0, lnum = top + 1; i < size; ++i)
|
|
|
507 {
|
|
481
|
508 fast_breakcheck();
|
|
|
509 if (got_int)
|
|
|
510 {
|
|
|
511 u_freeentry(uep, i);
|
|
|
512 return FAIL;
|
|
|
513 }
|
|
7
|
514 if ((uep->ue_array[i] = u_save_line(lnum++)) == NULL)
|
|
|
515 {
|
|
|
516 u_freeentry(uep, i);
|
|
|
517 goto nomem;
|
|
|
518 }
|
|
|
519 }
|
|
|
520 }
|
|
359
|
521 else
|
|
|
522 uep->ue_array = NULL;
|
|
7
|
523 uep->ue_next = curbuf->b_u_newhead->uh_entry;
|
|
|
524 curbuf->b_u_newhead->uh_entry = uep;
|
|
|
525 curbuf->b_u_synced = FALSE;
|
|
|
526 undo_undoes = FALSE;
|
|
|
527
|
|
|
528 return OK;
|
|
|
529
|
|
|
530 nomem:
|
|
|
531 msg_silent = 0; /* must display the prompt */
|
|
|
532 if (ask_yesno((char_u *)_("No undo possible; continue anyway"), TRUE)
|
|
|
533 == 'y')
|
|
|
534 {
|
|
|
535 undo_off = TRUE; /* will be reset when character typed */
|
|
|
536 return OK;
|
|
|
537 }
|
|
|
538 do_outofmem_msg((long_u)0);
|
|
|
539 return FAIL;
|
|
|
540 }
|
|
|
541
|
|
|
542 /*
|
|
|
543 * If 'cpoptions' contains 'u': Undo the previous undo or redo (vi compatible).
|
|
|
544 * If 'cpoptions' does not contain 'u': Always undo.
|
|
|
545 */
|
|
|
546 void
|
|
|
547 u_undo(count)
|
|
|
548 int count;
|
|
|
549 {
|
|
|
550 /*
|
|
|
551 * If we get an undo command while executing a macro, we behave like the
|
|
|
552 * original vi. If this happens twice in one macro the result will not
|
|
|
553 * be compatible.
|
|
|
554 */
|
|
|
555 if (curbuf->b_u_synced == FALSE)
|
|
|
556 {
|
|
825
|
557 u_sync(TRUE);
|
|
7
|
558 count = 1;
|
|
|
559 }
|
|
|
560
|
|
|
561 if (vim_strchr(p_cpo, CPO_UNDO) == NULL)
|
|
|
562 undo_undoes = TRUE;
|
|
|
563 else
|
|
|
564 undo_undoes = !undo_undoes;
|
|
|
565 u_doit(count);
|
|
|
566 }
|
|
|
567
|
|
|
568 /*
|
|
|
569 * If 'cpoptions' contains 'u': Repeat the previous undo or redo.
|
|
|
570 * If 'cpoptions' does not contain 'u': Always redo.
|
|
|
571 */
|
|
|
572 void
|
|
|
573 u_redo(count)
|
|
|
574 int count;
|
|
|
575 {
|
|
|
576 if (vim_strchr(p_cpo, CPO_UNDO) == NULL)
|
|
|
577 undo_undoes = FALSE;
|
|
|
578 u_doit(count);
|
|
|
579 }
|
|
|
580
|
|
|
581 /*
|
|
|
582 * Undo or redo, depending on 'undo_undoes', 'count' times.
|
|
|
583 */
|
|
|
584 static void
|
|
777
|
585 u_doit(startcount)
|
|
|
586 int startcount;
|
|
7
|
587 {
|
|
777
|
588 int count = startcount;
|
|
|
589
|
|
632
|
590 if (!undo_allowed())
|
|
7
|
591 return;
|
|
|
592
|
|
|
593 u_newcount = 0;
|
|
|
594 u_oldcount = 0;
|
|
179
|
595 if (curbuf->b_ml.ml_flags & ML_EMPTY)
|
|
|
596 u_oldcount = -1;
|
|
7
|
597 while (count--)
|
|
|
598 {
|
|
|
599 if (undo_undoes)
|
|
|
600 {
|
|
|
601 if (curbuf->b_u_curhead == NULL) /* first undo */
|
|
|
602 curbuf->b_u_curhead = curbuf->b_u_newhead;
|
|
|
603 else if (p_ul > 0) /* multi level undo */
|
|
|
604 /* get next undo */
|
|
|
605 curbuf->b_u_curhead = curbuf->b_u_curhead->uh_next;
|
|
|
606 /* nothing to undo */
|
|
|
607 if (curbuf->b_u_numhead == 0 || curbuf->b_u_curhead == NULL)
|
|
|
608 {
|
|
|
609 /* stick curbuf->b_u_curhead at end */
|
|
|
610 curbuf->b_u_curhead = curbuf->b_u_oldhead;
|
|
|
611 beep_flush();
|
|
777
|
612 if (count == startcount - 1)
|
|
|
613 {
|
|
|
614 MSG(_("Already at oldest change"));
|
|
|
615 return;
|
|
|
616 }
|
|
7
|
617 break;
|
|
|
618 }
|
|
|
619
|
|
777
|
620 u_undoredo(TRUE);
|
|
7
|
621 }
|
|
|
622 else
|
|
|
623 {
|
|
|
624 if (curbuf->b_u_curhead == NULL || p_ul <= 0)
|
|
|
625 {
|
|
|
626 beep_flush(); /* nothing to redo */
|
|
777
|
627 if (count == startcount - 1)
|
|
|
628 {
|
|
|
629 MSG(_("Already at newest change"));
|
|
|
630 return;
|
|
|
631 }
|
|
7
|
632 break;
|
|
|
633 }
|
|
|
634
|
|
777
|
635 u_undoredo(FALSE);
|
|
753
|
636
|
|
|
637 /* Advance for next redo. Set "newhead" when at the end of the
|
|
|
638 * redoable changes. */
|
|
|
639 if (curbuf->b_u_curhead->uh_prev == NULL)
|
|
|
640 curbuf->b_u_newhead = curbuf->b_u_curhead;
|
|
7
|
641 curbuf->b_u_curhead = curbuf->b_u_curhead->uh_prev;
|
|
|
642 }
|
|
|
643 }
|
|
798
|
644 u_undo_end(undo_undoes, FALSE);
|
|
753
|
645 }
|
|
|
646
|
|
|
647 static int lastmark = 0;
|
|
|
648
|
|
|
649 /*
|
|
|
650 * Undo or redo over the timeline.
|
|
|
651 * When "step" is negative go back in time, otherwise goes forward in time.
|
|
758
|
652 * When "sec" is FALSE make "step" steps, when "sec" is TRUE use "step" as
|
|
|
653 * seconds.
|
|
772
|
654 * When "absolute" is TRUE use "step" as the sequence number to jump to.
|
|
|
655 * "sec" must be FALSE then.
|
|
753
|
656 */
|
|
|
657 void
|
|
772
|
658 undo_time(step, sec, absolute)
|
|
758
|
659 long step;
|
|
|
660 int sec;
|
|
772
|
661 int absolute;
|
|
753
|
662 {
|
|
|
663 long target;
|
|
|
664 long closest;
|
|
758
|
665 long closest_start;
|
|
|
666 long closest_seq = 0;
|
|
|
667 long val;
|
|
753
|
668 u_header_T *uhp;
|
|
|
669 u_header_T *last;
|
|
|
670 int mark;
|
|
|
671 int nomark;
|
|
|
672 int round;
|
|
758
|
673 int dosec = sec;
|
|
|
674 int above = FALSE;
|
|
794
|
675 int did_undo = TRUE;
|
|
753
|
676
|
|
766
|
677 /* First make sure the current undoable change is synced. */
|
|
|
678 if (curbuf->b_u_synced == FALSE)
|
|
825
|
679 u_sync(TRUE);
|
|
766
|
680
|
|
753
|
681 u_newcount = 0;
|
|
|
682 u_oldcount = 0;
|
|
179
|
683 if (curbuf->b_ml.ml_flags & ML_EMPTY)
|
|
753
|
684 u_oldcount = -1;
|
|
|
685
|
|
777
|
686 /* "target" is the node below which we want to be.
|
|
|
687 * Init "closest" to a value we can't reach. */
|
|
772
|
688 if (absolute)
|
|
|
689 {
|
|
|
690 target = step;
|
|
777
|
691 closest = -1;
|
|
753
|
692 }
|
|
|
693 else
|
|
|
694 {
|
|
777
|
695 /* When doing computations with time_t subtract starttime, because
|
|
|
696 * time_t converted to a long may result in a wrong number. */
|
|
758
|
697 if (sec)
|
|
777
|
698 target = (long)(curbuf->b_u_seq_time - starttime) + step;
|
|
|
699 else
|
|
|
700 target = curbuf->b_u_seq_cur + step;
|
|
|
701 if (step < 0)
|
|
758
|
702 {
|
|
777
|
703 if (target < 0)
|
|
|
704 target = 0;
|
|
|
705 closest = -1;
|
|
758
|
706 }
|
|
|
707 else
|
|
|
708 {
|
|
777
|
709 if (sec)
|
|
798
|
710 closest = (long)(time(NULL) - starttime + 1);
|
|
777
|
711 else
|
|
|
712 closest = curbuf->b_u_seq_last + 2;
|
|
|
713 if (target >= closest)
|
|
|
714 target = closest - 1;
|
|
758
|
715 }
|
|
753
|
716 }
|
|
758
|
717 closest_start = closest;
|
|
777
|
718 closest_seq = curbuf->b_u_seq_cur;
|
|
753
|
719
|
|
758
|
720 /*
|
|
|
721 * May do this twice:
|
|
753
|
722 * 1. Search for "target", update "closest" to the best match found.
|
|
758
|
723 * 2. If "target" not found search for "closest".
|
|
|
724 *
|
|
|
725 * When using the closest time we use the sequence number in the second
|
|
|
726 * round, because there may be several entries with the same time.
|
|
|
727 */
|
|
753
|
728 for (round = 1; round <= 2; ++round)
|
|
|
729 {
|
|
|
730 /* Find the path from the current state to where we want to go. The
|
|
|
731 * desired state can be anywhere in the undo tree, need to go all over
|
|
|
732 * it. We put "nomark" in uh_walk where we have been without success,
|
|
|
733 * "mark" where it could possibly be. */
|
|
|
734 mark = ++lastmark;
|
|
|
735 nomark = ++lastmark;
|
|
|
736
|
|
|
737 if (curbuf->b_u_curhead == NULL) /* at leaf of the tree */
|
|
|
738 uhp = curbuf->b_u_newhead;
|
|
|
739 else
|
|
|
740 uhp = curbuf->b_u_curhead;
|
|
|
741
|
|
|
742 while (uhp != NULL)
|
|
|
743 {
|
|
|
744 uhp->uh_walk = mark;
|
|
798
|
745 val = (long)(dosec ? (uhp->uh_time - starttime) : uhp->uh_seq);
|
|
753
|
746
|
|
758
|
747 if (round == 1)
|
|
|
748 {
|
|
|
749 /* Remember the header that is closest to the target.
|
|
|
750 * It must be at least in the right direction (checked with
|
|
777
|
751 * "b_u_seq_cur"). When the timestamp is equal find the
|
|
758
|
752 * highest/lowest sequence number. */
|
|
777
|
753 if ((step < 0 ? uhp->uh_seq <= curbuf->b_u_seq_cur
|
|
|
754 : uhp->uh_seq > curbuf->b_u_seq_cur)
|
|
|
755 && ((dosec && val == closest)
|
|
|
756 ? (step < 0
|
|
|
757 ? uhp->uh_seq < closest_seq
|
|
|
758 : uhp->uh_seq > closest_seq)
|
|
|
759 : closest == closest_start
|
|
|
760 || (val > target
|
|
|
761 ? (closest > target
|
|
|
762 ? val - target <= closest - target
|
|
|
763 : val - target <= target - closest)
|
|
|
764 : (closest > target
|
|
|
765 ? target - val <= closest - target
|
|
|
766 : target - val <= target - closest))))
|
|
758
|
767 {
|
|
|
768 closest = val;
|
|
|
769 closest_seq = uhp->uh_seq;
|
|
|
770 }
|
|
|
771 }
|
|
|
772
|
|
|
773 /* Quit searching when we found a match. But when searching for a
|
|
|
774 * time we need to continue looking for the best uh_seq. */
|
|
|
775 if (target == val && !dosec)
|
|
|
776 break;
|
|
753
|
777
|
|
|
778 /* go down in the tree if we haven't been there */
|
|
|
779 if (uhp->uh_prev != NULL && uhp->uh_prev->uh_walk != nomark
|
|
|
780 && uhp->uh_prev->uh_walk != mark)
|
|
|
781 uhp = uhp->uh_prev;
|
|
|
782
|
|
|
783 /* go to alternate branch if we haven't been there */
|
|
|
784 else if (uhp->uh_alt_next != NULL
|
|
|
785 && uhp->uh_alt_next->uh_walk != nomark
|
|
|
786 && uhp->uh_alt_next->uh_walk != mark)
|
|
|
787 uhp = uhp->uh_alt_next;
|
|
|
788
|
|
|
789 /* go up in the tree if we haven't been there and we are at the
|
|
|
790 * start of alternate branches */
|
|
|
791 else if (uhp->uh_next != NULL && uhp->uh_alt_prev == NULL
|
|
|
792 && uhp->uh_next->uh_walk != nomark
|
|
|
793 && uhp->uh_next->uh_walk != mark)
|
|
798
|
794 {
|
|
|
795 /* If still at the start we don't go through this change. */
|
|
|
796 if (uhp == curbuf->b_u_curhead)
|
|
|
797 uhp->uh_walk = nomark;
|
|
753
|
798 uhp = uhp->uh_next;
|
|
798
|
799 }
|
|
753
|
800
|
|
|
801 else
|
|
|
802 {
|
|
|
803 /* need to backtrack; mark this node as useless */
|
|
|
804 uhp->uh_walk = nomark;
|
|
|
805 if (uhp->uh_alt_prev != NULL)
|
|
|
806 uhp = uhp->uh_alt_prev;
|
|
|
807 else
|
|
|
808 uhp = uhp->uh_next;
|
|
|
809 }
|
|
|
810 }
|
|
|
811
|
|
|
812 if (uhp != NULL) /* found it */
|
|
|
813 break;
|
|
772
|
814
|
|
|
815 if (absolute)
|
|
|
816 {
|
|
|
817 EMSGN(_("Undo number %ld not found"), step);
|
|
|
818 return;
|
|
|
819 }
|
|
|
820
|
|
758
|
821 if (closest == closest_start)
|
|
753
|
822 {
|
|
758
|
823 if (step < 0)
|
|
|
824 MSG(_("Already at oldest change"));
|
|
|
825 else
|
|
|
826 MSG(_("Already at newest change"));
|
|
753
|
827 return;
|
|
|
828 }
|
|
|
829
|
|
758
|
830 target = closest_seq;
|
|
|
831 dosec = FALSE;
|
|
|
832 if (step < 0)
|
|
|
833 above = TRUE; /* stop above the header */
|
|
753
|
834 }
|
|
|
835
|
|
|
836 /* If we found it: Follow the path to go to where we want to be. */
|
|
|
837 if (uhp != NULL)
|
|
|
838 {
|
|
|
839 /*
|
|
|
840 * First go up the tree as much as needed.
|
|
|
841 */
|
|
|
842 for (;;)
|
|
|
843 {
|
|
|
844 uhp = curbuf->b_u_curhead;
|
|
|
845 if (uhp == NULL)
|
|
|
846 uhp = curbuf->b_u_newhead;
|
|
|
847 else
|
|
|
848 uhp = uhp->uh_next;
|
|
777
|
849 if (uhp == NULL || uhp->uh_walk != mark
|
|
|
850 || (uhp->uh_seq == target && !above))
|
|
753
|
851 break;
|
|
|
852 curbuf->b_u_curhead = uhp;
|
|
777
|
853 u_undoredo(TRUE);
|
|
753
|
854 uhp->uh_walk = nomark; /* don't go back down here */
|
|
|
855 }
|
|
|
856
|
|
|
857 /*
|
|
758
|
858 * And now go down the tree (redo), branching off where needed.
|
|
753
|
859 */
|
|
|
860 uhp = curbuf->b_u_curhead;
|
|
777
|
861 while (uhp != NULL)
|
|
753
|
862 {
|
|
1056
|
863 /* Go back to the first branch with a mark. */
|
|
|
864 while (uhp->uh_alt_prev != NULL
|
|
|
865 && uhp->uh_alt_prev->uh_walk == mark)
|
|
|
866 uhp = uhp->uh_alt_prev;
|
|
|
867
|
|
753
|
868 /* Find the last branch with a mark, that's the one. */
|
|
|
869 last = uhp;
|
|
|
870 while (last->uh_alt_next != NULL
|
|
|
871 && last->uh_alt_next->uh_walk == mark)
|
|
|
872 last = last->uh_alt_next;
|
|
|
873 if (last != uhp)
|
|
|
874 {
|
|
|
875 /* Make the used branch the first entry in the list of
|
|
|
876 * alternatives to make "u" and CTRL-R take this branch. */
|
|
1056
|
877 while (uhp->uh_alt_prev != NULL)
|
|
|
878 uhp = uhp->uh_alt_prev;
|
|
753
|
879 if (last->uh_alt_next != NULL)
|
|
|
880 last->uh_alt_next->uh_alt_prev = last->uh_alt_prev;
|
|
|
881 last->uh_alt_prev->uh_alt_next = last->uh_alt_next;
|
|
|
882 last->uh_alt_prev = NULL;
|
|
|
883 last->uh_alt_next = uhp;
|
|
|
884 uhp->uh_alt_prev = last;
|
|
|
885
|
|
|
886 uhp = last;
|
|
777
|
887 if (uhp->uh_next != NULL)
|
|
|
888 uhp->uh_next->uh_prev = uhp;
|
|
753
|
889 }
|
|
758
|
890 curbuf->b_u_curhead = uhp;
|
|
753
|
891
|
|
|
892 if (uhp->uh_walk != mark)
|
|
|
893 break; /* must have reached the target */
|
|
|
894
|
|
758
|
895 /* Stop when going backwards in time and didn't find the exact
|
|
|
896 * header we were looking for. */
|
|
|
897 if (uhp->uh_seq == target && above)
|
|
798
|
898 {
|
|
|
899 curbuf->b_u_seq_cur = target - 1;
|
|
758
|
900 break;
|
|
798
|
901 }
|
|
758
|
902
|
|
777
|
903 u_undoredo(FALSE);
|
|
753
|
904
|
|
|
905 /* Advance "curhead" to below the header we last used. If it
|
|
|
906 * becomes NULL then we need to set "newhead" to this leaf. */
|
|
|
907 if (uhp->uh_prev == NULL)
|
|
|
908 curbuf->b_u_newhead = uhp;
|
|
|
909 curbuf->b_u_curhead = uhp->uh_prev;
|
|
794
|
910 did_undo = FALSE;
|
|
753
|
911
|
|
|
912 if (uhp->uh_seq == target) /* found it! */
|
|
|
913 break;
|
|
|
914
|
|
|
915 uhp = uhp->uh_prev;
|
|
|
916 if (uhp == NULL || uhp->uh_walk != mark)
|
|
|
917 {
|
|
777
|
918 /* Need to redo more but can't find it... */
|
|
753
|
919 EMSG2(_(e_intern2), "undo_time()");
|
|
|
920 break;
|
|
|
921 }
|
|
|
922 }
|
|
|
923 }
|
|
798
|
924 u_undo_end(did_undo, absolute);
|
|
7
|
925 }
|
|
|
926
|
|
|
927 /*
|
|
|
928 * u_undoredo: common code for undo and redo
|
|
|
929 *
|
|
|
930 * The lines in the file are replaced by the lines in the entry list at
|
|
|
931 * curbuf->b_u_curhead. The replaced lines in the file are saved in the entry
|
|
|
932 * list for the next undo/redo.
|
|
777
|
933 *
|
|
|
934 * When "undo" is TRUE we go up in the tree, when FALSE we go down.
|
|
7
|
935 */
|
|
|
936 static void
|
|
777
|
937 u_undoredo(undo)
|
|
|
938 int undo;
|
|
7
|
939 {
|
|
|
940 char_u **newarray = NULL;
|
|
|
941 linenr_T oldsize;
|
|
|
942 linenr_T newsize;
|
|
|
943 linenr_T top, bot;
|
|
|
944 linenr_T lnum;
|
|
|
945 linenr_T newlnum = MAXLNUM;
|
|
|
946 long i;
|
|
|
947 u_entry_T *uep, *nuep;
|
|
|
948 u_entry_T *newlist = NULL;
|
|
|
949 int old_flags;
|
|
|
950 int new_flags;
|
|
|
951 pos_T namedm[NMARKS];
|
|
692
|
952 #ifdef FEAT_VISUAL
|
|
|
953 visualinfo_T visualinfo;
|
|
|
954 #endif
|
|
7
|
955 int empty_buffer; /* buffer became empty */
|
|
758
|
956 u_header_T *curhead = curbuf->b_u_curhead;
|
|
7
|
957
|
|
758
|
958 old_flags = curhead->uh_flags;
|
|
7
|
959 new_flags = (curbuf->b_changed ? UH_CHANGED : 0) +
|
|
|
960 ((curbuf->b_ml.ml_flags & ML_EMPTY) ? UH_EMPTYBUF : 0);
|
|
|
961 setpcmark();
|
|
|
962
|
|
|
963 /*
|
|
|
964 * save marks before undo/redo
|
|
|
965 */
|
|
|
966 mch_memmove(namedm, curbuf->b_namedm, sizeof(pos_T) * NMARKS);
|
|
692
|
967 #ifdef FEAT_VISUAL
|
|
|
968 visualinfo = curbuf->b_visual;
|
|
|
969 #endif
|
|
7
|
970 curbuf->b_op_start.lnum = curbuf->b_ml.ml_line_count;
|
|
|
971 curbuf->b_op_start.col = 0;
|
|
|
972 curbuf->b_op_end.lnum = 0;
|
|
|
973 curbuf->b_op_end.col = 0;
|
|
|
974
|
|
758
|
975 for (uep = curhead->uh_entry; uep != NULL; uep = nuep)
|
|
7
|
976 {
|
|
|
977 top = uep->ue_top;
|
|
|
978 bot = uep->ue_bot;
|
|
|
979 if (bot == 0)
|
|
|
980 bot = curbuf->b_ml.ml_line_count + 1;
|
|
|
981 if (top > curbuf->b_ml.ml_line_count || top >= bot
|
|
|
982 || bot > curbuf->b_ml.ml_line_count + 1)
|
|
|
983 {
|
|
|
984 EMSG(_("E438: u_undo: line numbers wrong"));
|
|
|
985 changed(); /* don't want UNCHANGED now */
|
|
|
986 return;
|
|
|
987 }
|
|
|
988
|
|
|
989 oldsize = bot - top - 1; /* number of lines before undo */
|
|
|
990 newsize = uep->ue_size; /* number of lines after undo */
|
|
|
991
|
|
|
992 if (top < newlnum)
|
|
|
993 {
|
|
|
994 /* If the saved cursor is somewhere in this undo block, move it to
|
|
|
995 * the remembered position. Makes "gwap" put the cursor back
|
|
|
996 * where it was. */
|
|
758
|
997 lnum = curhead->uh_cursor.lnum;
|
|
7
|
998 if (lnum >= top && lnum <= top + newsize + 1)
|
|
|
999 {
|
|
758
|
1000 curwin->w_cursor = curhead->uh_cursor;
|
|
7
|
1001 newlnum = curwin->w_cursor.lnum - 1;
|
|
|
1002 }
|
|
|
1003 else
|
|
|
1004 {
|
|
|
1005 /* Use the first line that actually changed. Avoids that
|
|
|
1006 * undoing auto-formatting puts the cursor in the previous
|
|
|
1007 * line. */
|
|
|
1008 for (i = 0; i < newsize && i < oldsize; ++i)
|
|
|
1009 if (STRCMP(uep->ue_array[i], ml_get(top + 1 + i)) != 0)
|
|
|
1010 break;
|
|
|
1011 if (i == newsize && newlnum == MAXLNUM && uep->ue_next == NULL)
|
|
|
1012 {
|
|
|
1013 newlnum = top;
|
|
|
1014 curwin->w_cursor.lnum = newlnum + 1;
|
|
|
1015 }
|
|
|
1016 else if (i < newsize)
|
|
|
1017 {
|
|
|
1018 newlnum = top + i;
|
|
|
1019 curwin->w_cursor.lnum = newlnum + 1;
|
|
|
1020 }
|
|
|
1021 }
|
|
|
1022 }
|
|
|
1023
|
|
|
1024 empty_buffer = FALSE;
|
|
|
1025
|
|
|
1026 /* delete the lines between top and bot and save them in newarray */
|
|
168
|
1027 if (oldsize > 0)
|
|
7
|
1028 {
|
|
168
|
1029 if ((newarray = (char_u **)U_ALLOC_LINE(
|
|
7
|
1030 (unsigned)(sizeof(char_u *) * oldsize))) == NULL)
|
|
|
1031 {
|
|
|
1032 do_outofmem_msg((long_u)(sizeof(char_u *) * oldsize));
|
|
|
1033 /*
|
|
|
1034 * We have messed up the entry list, repair is impossible.
|
|
|
1035 * we have to free the rest of the list.
|
|
|
1036 */
|
|
|
1037 while (uep != NULL)
|
|
|
1038 {
|
|
|
1039 nuep = uep->ue_next;
|
|
|
1040 u_freeentry(uep, uep->ue_size);
|
|
|
1041 uep = nuep;
|
|
|
1042 }
|
|
|
1043 break;
|
|
|
1044 }
|
|
|
1045 /* delete backwards, it goes faster in most cases */
|
|
|
1046 for (lnum = bot - 1, i = oldsize; --i >= 0; --lnum)
|
|
|
1047 {
|
|
|
1048 /* what can we do when we run out of memory? */
|
|
|
1049 if ((newarray[i] = u_save_line(lnum)) == NULL)
|
|
|
1050 do_outofmem_msg((long_u)0);
|
|
|
1051 /* remember we deleted the last line in the buffer, and a
|
|
|
1052 * dummy empty line will be inserted */
|
|
|
1053 if (curbuf->b_ml.ml_line_count == 1)
|
|
|
1054 empty_buffer = TRUE;
|
|
|
1055 ml_delete(lnum, FALSE);
|
|
|
1056 }
|
|
|
1057 }
|
|
414
|
1058 else
|
|
|
1059 newarray = NULL;
|
|
7
|
1060
|
|
|
1061 /* insert the lines in u_array between top and bot */
|
|
|
1062 if (newsize)
|
|
|
1063 {
|
|
|
1064 for (lnum = top, i = 0; i < newsize; ++i, ++lnum)
|
|
|
1065 {
|
|
|
1066 /*
|
|
|
1067 * If the file is empty, there is an empty line 1 that we
|
|
|
1068 * should get rid of, by replacing it with the new line
|
|
|
1069 */
|
|
|
1070 if (empty_buffer && lnum == 0)
|
|
|
1071 ml_replace((linenr_T)1, uep->ue_array[i], TRUE);
|
|
|
1072 else
|
|
|
1073 ml_append(lnum, uep->ue_array[i], (colnr_T)0, FALSE);
|
|
168
|
1074 U_FREE_LINE(uep->ue_array[i]);
|
|
7
|
1075 }
|
|
168
|
1076 U_FREE_LINE((char_u *)uep->ue_array);
|
|
7
|
1077 }
|
|
|
1078
|
|
|
1079 /* adjust marks */
|
|
|
1080 if (oldsize != newsize)
|
|
|
1081 {
|
|
|
1082 mark_adjust(top + 1, top + oldsize, (long)MAXLNUM,
|
|
|
1083 (long)newsize - (long)oldsize);
|
|
|
1084 if (curbuf->b_op_start.lnum > top + oldsize)
|
|
|
1085 curbuf->b_op_start.lnum += newsize - oldsize;
|
|
|
1086 if (curbuf->b_op_end.lnum > top + oldsize)
|
|
|
1087 curbuf->b_op_end.lnum += newsize - oldsize;
|
|
|
1088 }
|
|
|
1089
|
|
|
1090 changed_lines(top + 1, 0, bot, newsize - oldsize);
|
|
|
1091
|
|
|
1092 /* set '[ and '] mark */
|
|
|
1093 if (top + 1 < curbuf->b_op_start.lnum)
|
|
|
1094 curbuf->b_op_start.lnum = top + 1;
|
|
|
1095 if (newsize == 0 && top + 1 > curbuf->b_op_end.lnum)
|
|
|
1096 curbuf->b_op_end.lnum = top + 1;
|
|
|
1097 else if (top + newsize > curbuf->b_op_end.lnum)
|
|
|
1098 curbuf->b_op_end.lnum = top + newsize;
|
|
|
1099
|
|
|
1100 u_newcount += newsize;
|
|
|
1101 u_oldcount += oldsize;
|
|
|
1102 uep->ue_size = oldsize;
|
|
|
1103 uep->ue_array = newarray;
|
|
|
1104 uep->ue_bot = top + newsize + 1;
|
|
|
1105
|
|
|
1106 /*
|
|
|
1107 * insert this entry in front of the new entry list
|
|
|
1108 */
|
|
|
1109 nuep = uep->ue_next;
|
|
|
1110 uep->ue_next = newlist;
|
|
|
1111 newlist = uep;
|
|
|
1112 }
|
|
|
1113
|
|
758
|
1114 curhead->uh_entry = newlist;
|
|
|
1115 curhead->uh_flags = new_flags;
|
|
7
|
1116 if ((old_flags & UH_EMPTYBUF) && bufempty())
|
|
|
1117 curbuf->b_ml.ml_flags |= ML_EMPTY;
|
|
|
1118 if (old_flags & UH_CHANGED)
|
|
|
1119 changed();
|
|
|
1120 else
|
|
33
|
1121 #ifdef FEAT_NETBEANS_INTG
|
|
|
1122 /* per netbeans undo rules, keep it as modified */
|
|
|
1123 if (!isNetbeansModified(curbuf))
|
|
|
1124 #endif
|
|
7
|
1125 unchanged(curbuf, FALSE);
|
|
|
1126
|
|
|
1127 /*
|
|
|
1128 * restore marks from before undo/redo
|
|
|
1129 */
|
|
|
1130 for (i = 0; i < NMARKS; ++i)
|
|
758
|
1131 if (curhead->uh_namedm[i].lnum != 0)
|
|
7
|
1132 {
|
|
758
|
1133 curbuf->b_namedm[i] = curhead->uh_namedm[i];
|
|
|
1134 curhead->uh_namedm[i] = namedm[i];
|
|
7
|
1135 }
|
|
692
|
1136 #ifdef FEAT_VISUAL
|
|
758
|
1137 if (curhead->uh_visual.vi_start.lnum != 0)
|
|
692
|
1138 {
|
|
758
|
1139 curbuf->b_visual = curhead->uh_visual;
|
|
|
1140 curhead->uh_visual = visualinfo;
|
|
692
|
1141 }
|
|
|
1142 #endif
|
|
7
|
1143
|
|
|
1144 /*
|
|
|
1145 * If the cursor is only off by one line, put it at the same position as
|
|
|
1146 * before starting the change (for the "o" command).
|
|
|
1147 * Otherwise the cursor should go to the first undone line.
|
|
|
1148 */
|
|
758
|
1149 if (curhead->uh_cursor.lnum + 1 == curwin->w_cursor.lnum
|
|
7
|
1150 && curwin->w_cursor.lnum > 1)
|
|
|
1151 --curwin->w_cursor.lnum;
|
|
758
|
1152 if (curhead->uh_cursor.lnum == curwin->w_cursor.lnum)
|
|
7
|
1153 {
|
|
758
|
1154 curwin->w_cursor.col = curhead->uh_cursor.col;
|
|
7
|
1155 #ifdef FEAT_VIRTUALEDIT
|
|
758
|
1156 if (virtual_active() && curhead->uh_cursor_vcol >= 0)
|
|
|
1157 coladvance((colnr_T)curhead->uh_cursor_vcol);
|
|
7
|
1158 else
|
|
|
1159 curwin->w_cursor.coladd = 0;
|
|
|
1160 #endif
|
|
|
1161 }
|
|
|
1162 else if (curwin->w_cursor.lnum <= curbuf->b_ml.ml_line_count)
|
|
|
1163 beginline(BL_SOL | BL_FIX);
|
|
|
1164 else
|
|
|
1165 {
|
|
|
1166 /* We get here with the current cursor line being past the end (eg
|
|
|
1167 * after adding lines at the end of the file, and then undoing it).
|
|
|
1168 * check_cursor() will move the cursor to the last line. Move it to
|
|
|
1169 * the first column here. */
|
|
|
1170 curwin->w_cursor.col = 0;
|
|
|
1171 #ifdef FEAT_VIRTUALEDIT
|
|
|
1172 curwin->w_cursor.coladd = 0;
|
|
|
1173 #endif
|
|
|
1174 }
|
|
|
1175
|
|
|
1176 /* Make sure the cursor is on an existing line and column. */
|
|
|
1177 check_cursor();
|
|
758
|
1178
|
|
|
1179 /* Remember where we are for "g-" and ":earlier 10s". */
|
|
|
1180 curbuf->b_u_seq_cur = curhead->uh_seq;
|
|
777
|
1181 if (undo)
|
|
|
1182 /* We are below the previous undo. However, to make ":earlier 1s"
|
|
|
1183 * work we compute this as being just above the just undone change. */
|
|
|
1184 --curbuf->b_u_seq_cur;
|
|
|
1185
|
|
|
1186 /* The timestamp can be the same for multiple changes, just use the one of
|
|
|
1187 * the undone/redone change. */
|
|
758
|
1188 curbuf->b_u_seq_time = curhead->uh_time;
|
|
7
|
1189 }
|
|
|
1190
|
|
|
1191 /*
|
|
|
1192 * If we deleted or added lines, report the number of less/more lines.
|
|
|
1193 * Otherwise, report the number of changes (this may be incorrect
|
|
|
1194 * in some cases, but it's better than nothing).
|
|
|
1195 */
|
|
|
1196 static void
|
|
798
|
1197 u_undo_end(did_undo, absolute)
|
|
794
|
1198 int did_undo; /* just did an undo */
|
|
798
|
1199 int absolute; /* used ":undo N" */
|
|
7
|
1200 {
|
|
944
|
1201 char *msgstr;
|
|
772
|
1202 u_header_T *uhp;
|
|
|
1203 char_u msgbuf[80];
|
|
753
|
1204
|
|
7
|
1205 #ifdef FEAT_FOLDING
|
|
|
1206 if ((fdo_flags & FDO_UNDO) && KeyTyped)
|
|
|
1207 foldOpenCursor();
|
|
|
1208 #endif
|
|
753
|
1209
|
|
|
1210 if (global_busy /* no messages now, wait until global is finished */
|
|
|
1211 || !messaging()) /* 'lazyredraw' set, don't do messages now */
|
|
|
1212 return;
|
|
|
1213
|
|
|
1214 if (curbuf->b_ml.ml_flags & ML_EMPTY)
|
|
|
1215 --u_newcount;
|
|
|
1216
|
|
|
1217 u_oldcount -= u_newcount;
|
|
|
1218 if (u_oldcount == -1)
|
|
944
|
1219 msgstr = N_("more line");
|
|
753
|
1220 else if (u_oldcount < 0)
|
|
944
|
1221 msgstr = N_("more lines");
|
|
753
|
1222 else if (u_oldcount == 1)
|
|
944
|
1223 msgstr = N_("line less");
|
|
753
|
1224 else if (u_oldcount > 1)
|
|
944
|
1225 msgstr = N_("fewer lines");
|
|
753
|
1226 else
|
|
|
1227 {
|
|
|
1228 u_oldcount = u_newcount;
|
|
|
1229 if (u_newcount == 1)
|
|
944
|
1230 msgstr = N_("change");
|
|
753
|
1231 else
|
|
944
|
1232 msgstr = N_("changes");
|
|
753
|
1233 }
|
|
|
1234
|
|
772
|
1235 if (curbuf->b_u_curhead != NULL)
|
|
794
|
1236 {
|
|
798
|
1237 /* For ":undo N" we prefer a "after #N" message. */
|
|
|
1238 if (absolute && curbuf->b_u_curhead->uh_next != NULL)
|
|
|
1239 {
|
|
|
1240 uhp = curbuf->b_u_curhead->uh_next;
|
|
|
1241 did_undo = FALSE;
|
|
|
1242 }
|
|
|
1243 else if (did_undo)
|
|
794
|
1244 uhp = curbuf->b_u_curhead;
|
|
|
1245 else
|
|
|
1246 uhp = curbuf->b_u_curhead->uh_next;
|
|
|
1247 }
|
|
753
|
1248 else
|
|
772
|
1249 uhp = curbuf->b_u_newhead;
|
|
753
|
1250
|
|
772
|
1251 if (uhp == NULL)
|
|
|
1252 *msgbuf = NUL;
|
|
|
1253 else
|
|
|
1254 u_add_time(msgbuf, sizeof(msgbuf), uhp->uh_time);
|
|
|
1255
|
|
794
|
1256 smsg((char_u *)_("%ld %s; %s #%ld %s"),
|
|
777
|
1257 u_oldcount < 0 ? -u_oldcount : u_oldcount,
|
|
944
|
1258 _(msgstr),
|
|
794
|
1259 did_undo ? _("before") : _("after"),
|
|
|
1260 uhp == NULL ? 0L : uhp->uh_seq,
|
|
|
1261 msgbuf);
|
|
7
|
1262 }
|
|
|
1263
|
|
|
1264 /*
|
|
|
1265 * u_sync: stop adding to the current entry list
|
|
|
1266 */
|
|
|
1267 void
|
|
825
|
1268 u_sync(force)
|
|
|
1269 int force; /* Also sync when no_u_sync is set. */
|
|
7
|
1270 {
|
|
825
|
1271 /* Skip it when already synced or syncing is disabled. */
|
|
|
1272 if (curbuf->b_u_synced || (!force && no_u_sync > 0))
|
|
|
1273 return;
|
|
7
|
1274 #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
|
|
|
1275 if (im_is_preediting())
|
|
|
1276 return; /* XIM is busy, don't break an undo sequence */
|
|
|
1277 #endif
|
|
|
1278 if (p_ul < 0)
|
|
|
1279 curbuf->b_u_synced = TRUE; /* no entries, nothing to do */
|
|
|
1280 else
|
|
|
1281 {
|
|
|
1282 u_getbot(); /* compute ue_bot of previous u_save */
|
|
|
1283 curbuf->b_u_curhead = NULL;
|
|
|
1284 }
|
|
|
1285 }
|
|
|
1286
|
|
|
1287 /*
|
|
772
|
1288 * ":undolist": List the leafs of the undo tree
|
|
|
1289 */
|
|
|
1290 /*ARGSUSED*/
|
|
|
1291 void
|
|
|
1292 ex_undolist(eap)
|
|
|
1293 exarg_T *eap;
|
|
|
1294 {
|
|
|
1295 garray_T ga;
|
|
|
1296 u_header_T *uhp;
|
|
|
1297 int mark;
|
|
|
1298 int nomark;
|
|
|
1299 int changes = 1;
|
|
|
1300 int i;
|
|
|
1301
|
|
|
1302 /*
|
|
|
1303 * 1: walk the tree to find all leafs, put the info in "ga".
|
|
|
1304 * 2: sort the lines
|
|
|
1305 * 3: display the list
|
|
|
1306 */
|
|
|
1307 mark = ++lastmark;
|
|
|
1308 nomark = ++lastmark;
|
|
|
1309 ga_init2(&ga, (int)sizeof(char *), 20);
|
|
|
1310
|
|
|
1311 uhp = curbuf->b_u_oldhead;
|
|
|
1312 while (uhp != NULL)
|
|
|
1313 {
|
|
777
|
1314 if (uhp->uh_prev == NULL && uhp->uh_walk != nomark
|
|
|
1315 && uhp->uh_walk != mark)
|
|
772
|
1316 {
|
|
|
1317 if (ga_grow(&ga, 1) == FAIL)
|
|
|
1318 break;
|
|
|
1319 vim_snprintf((char *)IObuff, IOSIZE, "%6ld %7ld ",
|
|
|
1320 uhp->uh_seq, changes);
|
|
|
1321 u_add_time(IObuff + STRLEN(IObuff), IOSIZE - STRLEN(IObuff),
|
|
|
1322 uhp->uh_time);
|
|
|
1323 ((char_u **)(ga.ga_data))[ga.ga_len++] = vim_strsave(IObuff);
|
|
|
1324 }
|
|
|
1325
|
|
|
1326 uhp->uh_walk = mark;
|
|
|
1327
|
|
|
1328 /* go down in the tree if we haven't been there */
|
|
|
1329 if (uhp->uh_prev != NULL && uhp->uh_prev->uh_walk != nomark
|
|
|
1330 && uhp->uh_prev->uh_walk != mark)
|
|
|
1331 {
|
|
|
1332 uhp = uhp->uh_prev;
|
|
|
1333 ++changes;
|
|
|
1334 }
|
|
|
1335
|
|
|
1336 /* go to alternate branch if we haven't been there */
|
|
|
1337 else if (uhp->uh_alt_next != NULL
|
|
|
1338 && uhp->uh_alt_next->uh_walk != nomark
|
|
|
1339 && uhp->uh_alt_next->uh_walk != mark)
|
|
|
1340 uhp = uhp->uh_alt_next;
|
|
|
1341
|
|
|
1342 /* go up in the tree if we haven't been there and we are at the
|
|
|
1343 * start of alternate branches */
|
|
|
1344 else if (uhp->uh_next != NULL && uhp->uh_alt_prev == NULL
|
|
|
1345 && uhp->uh_next->uh_walk != nomark
|
|
|
1346 && uhp->uh_next->uh_walk != mark)
|
|
|
1347 {
|
|
|
1348 uhp = uhp->uh_next;
|
|
|
1349 --changes;
|
|
|
1350 }
|
|
|
1351
|
|
|
1352 else
|
|
|
1353 {
|
|
|
1354 /* need to backtrack; mark this node as done */
|
|
|
1355 uhp->uh_walk = nomark;
|
|
|
1356 if (uhp->uh_alt_prev != NULL)
|
|
|
1357 uhp = uhp->uh_alt_prev;
|
|
|
1358 else
|
|
|
1359 {
|
|
|
1360 uhp = uhp->uh_next;
|
|
|
1361 --changes;
|
|
|
1362 }
|
|
|
1363 }
|
|
|
1364 }
|
|
|
1365
|
|
|
1366 if (ga.ga_len == 0)
|
|
|
1367 MSG(_("Nothing to undo"));
|
|
|
1368 else
|
|
|
1369 {
|
|
|
1370 sort_strings((char_u **)ga.ga_data, ga.ga_len);
|
|
|
1371
|
|
|
1372 msg_start();
|
|
|
1373 msg_puts_attr((char_u *)_("number changes time"), hl_attr(HLF_T));
|
|
|
1374 for (i = 0; i < ga.ga_len && !got_int; ++i)
|
|
|
1375 {
|
|
|
1376 msg_putchar('\n');
|
|
|
1377 if (got_int)
|
|
|
1378 break;
|
|
|
1379 msg_puts(((char_u **)ga.ga_data)[i]);
|
|
|
1380 }
|
|
|
1381 msg_end();
|
|
|
1382
|
|
|
1383 ga_clear_strings(&ga);
|
|
|
1384 }
|
|
|
1385 }
|
|
|
1386
|
|
|
1387 /*
|
|
|
1388 * Put the timestamp of an undo header in "buf[buflen]" in a nice format.
|
|
|
1389 */
|
|
|
1390 static void
|
|
|
1391 u_add_time(buf, buflen, tt)
|
|
|
1392 char_u *buf;
|
|
|
1393 size_t buflen;
|
|
|
1394 time_t tt;
|
|
|
1395 {
|
|
|
1396 #ifdef HAVE_STRFTIME
|
|
|
1397 struct tm *curtime;
|
|
|
1398
|
|
|
1399 if (time(NULL) - tt >= 100)
|
|
|
1400 {
|
|
|
1401 curtime = localtime(&tt);
|
|
810
|
1402 (void)strftime((char *)buf, buflen, "%H:%M:%S", curtime);
|
|
772
|
1403 }
|
|
|
1404 else
|
|
|
1405 #endif
|
|
835
|
1406 vim_snprintf((char *)buf, buflen, _("%ld seconds ago"),
|
|
772
|
1407 (long)(time(NULL) - tt));
|
|
|
1408 }
|
|
|
1409
|
|
|
1410 /*
|
|
697
|
1411 * ":undojoin": continue adding to the last entry list
|
|
|
1412 */
|
|
|
1413 /*ARGSUSED*/
|
|
|
1414 void
|
|
|
1415 ex_undojoin(eap)
|
|
|
1416 exarg_T *eap;
|
|
|
1417 {
|
|
839
|
1418 if (curbuf->b_u_newhead == NULL)
|
|
|
1419 return; /* nothing changed before */
|
|
|
1420 if (curbuf->b_u_curhead != NULL)
|
|
|
1421 {
|
|
|
1422 EMSG(_("E790: undojoin is not allowed after undo"));
|
|
|
1423 return;
|
|
|
1424 }
|
|
697
|
1425 if (!curbuf->b_u_synced)
|
|
|
1426 return; /* already unsynced */
|
|
|
1427 if (p_ul < 0)
|
|
|
1428 return; /* no entries, nothing to do */
|
|
|
1429 else
|
|
|
1430 {
|
|
|
1431 /* Go back to the last entry */
|
|
|
1432 curbuf->b_u_curhead = curbuf->b_u_newhead;
|
|
|
1433 curbuf->b_u_synced = FALSE; /* no entries, nothing to do */
|
|
|
1434 }
|
|
|
1435 }
|
|
|
1436
|
|
|
1437 /*
|
|
7
|
1438 * Called after writing the file and setting b_changed to FALSE.
|
|
|
1439 * Now an undo means that the buffer is modified.
|
|
|
1440 */
|
|
|
1441 void
|
|
|
1442 u_unchanged(buf)
|
|
|
1443 buf_T *buf;
|
|
|
1444 {
|
|
758
|
1445 u_unch_branch(buf->b_u_oldhead);
|
|
|
1446 buf->b_did_warn = FALSE;
|
|
|
1447 }
|
|
|
1448
|
|
|
1449 static void
|
|
|
1450 u_unch_branch(uhp)
|
|
|
1451 u_header_T *uhp;
|
|
|
1452 {
|
|
753
|
1453 u_header_T *uh;
|
|
7
|
1454
|
|
758
|
1455 for (uh = uhp; uh != NULL; uh = uh->uh_prev)
|
|
|
1456 {
|
|
7
|
1457 uh->uh_flags |= UH_CHANGED;
|
|
758
|
1458 if (uh->uh_alt_next != NULL)
|
|
|
1459 u_unch_branch(uh->uh_alt_next); /* recursive */
|
|
|
1460 }
|
|
7
|
1461 }
|
|
|
1462
|
|
|
1463 /*
|
|
|
1464 * Get pointer to last added entry.
|
|
|
1465 * If it's not valid, give an error message and return NULL.
|
|
|
1466 */
|
|
|
1467 static u_entry_T *
|
|
|
1468 u_get_headentry()
|
|
|
1469 {
|
|
|
1470 if (curbuf->b_u_newhead == NULL || curbuf->b_u_newhead->uh_entry == NULL)
|
|
|
1471 {
|
|
|
1472 EMSG(_("E439: undo list corrupt"));
|
|
|
1473 return NULL;
|
|
|
1474 }
|
|
|
1475 return curbuf->b_u_newhead->uh_entry;
|
|
|
1476 }
|
|
|
1477
|
|
|
1478 /*
|
|
|
1479 * u_getbot(): compute the line number of the previous u_save
|
|
|
1480 * It is called only when b_u_synced is FALSE.
|
|
|
1481 */
|
|
|
1482 static void
|
|
|
1483 u_getbot()
|
|
|
1484 {
|
|
|
1485 u_entry_T *uep;
|
|
|
1486 linenr_T extra;
|
|
|
1487
|
|
|
1488 uep = u_get_headentry(); /* check for corrupt undo list */
|
|
|
1489 if (uep == NULL)
|
|
|
1490 return;
|
|
|
1491
|
|
|
1492 uep = curbuf->b_u_newhead->uh_getbot_entry;
|
|
|
1493 if (uep != NULL)
|
|
|
1494 {
|
|
|
1495 /*
|
|
|
1496 * the new ue_bot is computed from the number of lines that has been
|
|
|
1497 * inserted (0 - deleted) since calling u_save. This is equal to the
|
|
|
1498 * old line count subtracted from the current line count.
|
|
|
1499 */
|
|
|
1500 extra = curbuf->b_ml.ml_line_count - uep->ue_lcount;
|
|
|
1501 uep->ue_bot = uep->ue_top + uep->ue_size + 1 + extra;
|
|
|
1502 if (uep->ue_bot < 1 || uep->ue_bot > curbuf->b_ml.ml_line_count)
|
|
|
1503 {
|
|
|
1504 EMSG(_("E440: undo line missing"));
|
|
|
1505 uep->ue_bot = uep->ue_top + 1; /* assume all lines deleted, will
|
|
|
1506 * get all the old lines back
|
|
|
1507 * without deleting the current
|
|
|
1508 * ones */
|
|
|
1509 }
|
|
|
1510
|
|
|
1511 curbuf->b_u_newhead->uh_getbot_entry = NULL;
|
|
|
1512 }
|
|
|
1513
|
|
|
1514 curbuf->b_u_synced = TRUE;
|
|
|
1515 }
|
|
|
1516
|
|
|
1517 /*
|
|
753
|
1518 * Free one header and its entry list and adjust the pointers.
|
|
7
|
1519 */
|
|
|
1520 static void
|
|
758
|
1521 u_freeheader(buf, uhp, uhpp)
|
|
168
|
1522 buf_T *buf;
|
|
753
|
1523 u_header_T *uhp;
|
|
|
1524 u_header_T **uhpp; /* if not NULL reset when freeing this header */
|
|
7
|
1525 {
|
|
753
|
1526 /* When there is an alternate redo list free that branch completely,
|
|
|
1527 * because we can never go there. */
|
|
|
1528 if (uhp->uh_alt_next != NULL)
|
|
|
1529 u_freebranch(buf, uhp->uh_alt_next, uhpp);
|
|
7
|
1530
|
|
753
|
1531 if (uhp->uh_alt_prev != NULL)
|
|
|
1532 uhp->uh_alt_prev->uh_alt_next = NULL;
|
|
7
|
1533
|
|
753
|
1534 /* Update the links in the list to remove the header. */
|
|
7
|
1535 if (uhp->uh_next == NULL)
|
|
168
|
1536 buf->b_u_oldhead = uhp->uh_prev;
|
|
7
|
1537 else
|
|
|
1538 uhp->uh_next->uh_prev = uhp->uh_prev;
|
|
|
1539
|
|
|
1540 if (uhp->uh_prev == NULL)
|
|
168
|
1541 buf->b_u_newhead = uhp->uh_next;
|
|
7
|
1542 else
|
|
|
1543 uhp->uh_prev->uh_next = uhp->uh_next;
|
|
|
1544
|
|
753
|
1545 u_freeentries(buf, uhp, uhpp);
|
|
|
1546 }
|
|
|
1547
|
|
|
1548 /*
|
|
758
|
1549 * Free an alternate branch and any following alternate branches.
|
|
753
|
1550 */
|
|
|
1551 static void
|
|
|
1552 u_freebranch(buf, uhp, uhpp)
|
|
|
1553 buf_T *buf;
|
|
|
1554 u_header_T *uhp;
|
|
|
1555 u_header_T **uhpp; /* if not NULL reset when freeing this header */
|
|
|
1556 {
|
|
|
1557 u_header_T *tofree, *next;
|
|
|
1558
|
|
|
1559 if (uhp->uh_alt_prev != NULL)
|
|
|
1560 uhp->uh_alt_prev->uh_alt_next = NULL;
|
|
|
1561
|
|
|
1562 next = uhp;
|
|
|
1563 while (next != NULL)
|
|
|
1564 {
|
|
|
1565 tofree = next;
|
|
|
1566 if (tofree->uh_alt_next != NULL)
|
|
|
1567 u_freebranch(buf, tofree->uh_alt_next, uhpp); /* recursive */
|
|
|
1568 next = tofree->uh_prev;
|
|
|
1569 u_freeentries(buf, tofree, uhpp);
|
|
|
1570 }
|
|
|
1571 }
|
|
|
1572
|
|
|
1573 /*
|
|
|
1574 * Free all the undo entries for one header and the header itself.
|
|
|
1575 * This means that "uhp" is invalid when returning.
|
|
|
1576 */
|
|
|
1577 static void
|
|
|
1578 u_freeentries(buf, uhp, uhpp)
|
|
|
1579 buf_T *buf;
|
|
|
1580 u_header_T *uhp;
|
|
|
1581 u_header_T **uhpp; /* if not NULL reset when freeing this header */
|
|
|
1582 {
|
|
|
1583 u_entry_T *uep, *nuep;
|
|
|
1584
|
|
|
1585 /* Check for pointers to the header that become invalid now. */
|
|
|
1586 if (buf->b_u_curhead == uhp)
|
|
|
1587 buf->b_u_curhead = NULL;
|
|
|
1588 if (uhpp != NULL && uhp == *uhpp)
|
|
|
1589 *uhpp = NULL;
|
|
|
1590
|
|
|
1591 for (uep = uhp->uh_entry; uep != NULL; uep = nuep)
|
|
|
1592 {
|
|
|
1593 nuep = uep->ue_next;
|
|
|
1594 u_freeentry(uep, uep->ue_size);
|
|
|
1595 }
|
|
|
1596
|
|
168
|
1597 U_FREE_LINE((char_u *)uhp);
|
|
|
1598 --buf->b_u_numhead;
|
|
7
|
1599 }
|
|
|
1600
|
|
|
1601 /*
|
|
|
1602 * free entry 'uep' and 'n' lines in uep->ue_array[]
|
|
|
1603 */
|
|
|
1604 static void
|
|
|
1605 u_freeentry(uep, n)
|
|
|
1606 u_entry_T *uep;
|
|
|
1607 long n;
|
|
|
1608 {
|
|
414
|
1609 while (n > 0)
|
|
168
|
1610 U_FREE_LINE(uep->ue_array[--n]);
|
|
359
|
1611 U_FREE_LINE((char_u *)uep->ue_array);
|
|
168
|
1612 U_FREE_LINE((char_u *)uep);
|
|
7
|
1613 }
|
|
|
1614
|
|
|
1615 /*
|
|
|
1616 * invalidate the undo buffer; called when storage has already been released
|
|
|
1617 */
|
|
|
1618 void
|
|
|
1619 u_clearall(buf)
|
|
|
1620 buf_T *buf;
|
|
|
1621 {
|
|
|
1622 buf->b_u_newhead = buf->b_u_oldhead = buf->b_u_curhead = NULL;
|
|
|
1623 buf->b_u_synced = TRUE;
|
|
|
1624 buf->b_u_numhead = 0;
|
|
|
1625 buf->b_u_line_ptr = NULL;
|
|
|
1626 buf->b_u_line_lnum = 0;
|
|
|
1627 }
|
|
|
1628
|
|
|
1629 /*
|
|
|
1630 * save the line "lnum" for the "U" command
|
|
|
1631 */
|
|
|
1632 void
|
|
|
1633 u_saveline(lnum)
|
|
|
1634 linenr_T lnum;
|
|
|
1635 {
|
|
|
1636 if (lnum == curbuf->b_u_line_lnum) /* line is already saved */
|
|
|
1637 return;
|
|
356
|
1638 if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count) /* should never happen */
|
|
7
|
1639 return;
|
|
|
1640 u_clearline();
|
|
|
1641 curbuf->b_u_line_lnum = lnum;
|
|
|
1642 if (curwin->w_cursor.lnum == lnum)
|
|
|
1643 curbuf->b_u_line_colnr = curwin->w_cursor.col;
|
|
|
1644 else
|
|
|
1645 curbuf->b_u_line_colnr = 0;
|
|
|
1646 if ((curbuf->b_u_line_ptr = u_save_line(lnum)) == NULL)
|
|
|
1647 do_outofmem_msg((long_u)0);
|
|
|
1648 }
|
|
|
1649
|
|
|
1650 /*
|
|
|
1651 * clear the line saved for the "U" command
|
|
|
1652 * (this is used externally for crossing a line while in insert mode)
|
|
|
1653 */
|
|
|
1654 void
|
|
|
1655 u_clearline()
|
|
|
1656 {
|
|
|
1657 if (curbuf->b_u_line_ptr != NULL)
|
|
|
1658 {
|
|
168
|
1659 U_FREE_LINE(curbuf->b_u_line_ptr);
|
|
7
|
1660 curbuf->b_u_line_ptr = NULL;
|
|
|
1661 curbuf->b_u_line_lnum = 0;
|
|
|
1662 }
|
|
|
1663 }
|
|
|
1664
|
|
|
1665 /*
|
|
|
1666 * Implementation of the "U" command.
|
|
|
1667 * Differentiation from vi: "U" can be undone with the next "U".
|
|
|
1668 * We also allow the cursor to be in another line.
|
|
|
1669 */
|
|
|
1670 void
|
|
|
1671 u_undoline()
|
|
|
1672 {
|
|
|
1673 colnr_T t;
|
|
|
1674 char_u *oldp;
|
|
|
1675
|
|
|
1676 if (undo_off)
|
|
|
1677 return;
|
|
|
1678
|
|
|
1679 if (curbuf->b_u_line_ptr == NULL ||
|
|
|
1680 curbuf->b_u_line_lnum > curbuf->b_ml.ml_line_count)
|
|
|
1681 {
|
|
|
1682 beep_flush();
|
|
|
1683 return;
|
|
|
1684 }
|
|
|
1685 /* first save the line for the 'u' command */
|
|
|
1686 if (u_savecommon(curbuf->b_u_line_lnum - 1,
|
|
|
1687 curbuf->b_u_line_lnum + 1, (linenr_T)0) == FAIL)
|
|
|
1688 return;
|
|
|
1689 oldp = u_save_line(curbuf->b_u_line_lnum);
|
|
|
1690 if (oldp == NULL)
|
|
|
1691 {
|
|
|
1692 do_outofmem_msg((long_u)0);
|
|
|
1693 return;
|
|
|
1694 }
|
|
|
1695 ml_replace(curbuf->b_u_line_lnum, curbuf->b_u_line_ptr, TRUE);
|
|
|
1696 changed_bytes(curbuf->b_u_line_lnum, 0);
|
|
168
|
1697 U_FREE_LINE(curbuf->b_u_line_ptr);
|
|
7
|
1698 curbuf->b_u_line_ptr = oldp;
|
|
|
1699
|
|
|
1700 t = curbuf->b_u_line_colnr;
|
|
|
1701 if (curwin->w_cursor.lnum == curbuf->b_u_line_lnum)
|
|
|
1702 curbuf->b_u_line_colnr = curwin->w_cursor.col;
|
|
|
1703 curwin->w_cursor.col = t;
|
|
|
1704 curwin->w_cursor.lnum = curbuf->b_u_line_lnum;
|
|
|
1705 }
|
|
|
1706
|
|
|
1707 /*
|
|
168
|
1708 * There are two implementations of the memory management for undo:
|
|
|
1709 * 1. Use the standard malloc()/free() functions.
|
|
|
1710 * This should be fast for allocating memory, but when a buffer is
|
|
|
1711 * abandoned every single allocated chunk must be freed, which may be slow.
|
|
|
1712 * 2. Allocate larger blocks of memory and keep track of chunks ourselves.
|
|
|
1713 * This is fast for abandoning, but the use of linked lists is slow for
|
|
|
1714 * finding a free chunk. Esp. when a lot of lines are changed or deleted.
|
|
|
1715 * A bit of profiling showed that the first method is faster, especially when
|
|
|
1716 * making a large number of changes, under the condition that malloc()/free()
|
|
|
1717 * is implemented efficiently.
|
|
|
1718 */
|
|
|
1719 #ifdef U_USE_MALLOC
|
|
|
1720 /*
|
|
|
1721 * Version of undo memory allocation using malloc()/free()
|
|
|
1722 *
|
|
|
1723 * U_FREE_LINE() and U_ALLOC_LINE() are macros that invoke vim_free() and
|
|
|
1724 * lalloc() directly.
|
|
|
1725 */
|
|
|
1726
|
|
|
1727 /*
|
|
|
1728 * Free all allocated memory blocks for the buffer 'buf'.
|
|
|
1729 */
|
|
|
1730 void
|
|
|
1731 u_blockfree(buf)
|
|
|
1732 buf_T *buf;
|
|
|
1733 {
|
|
753
|
1734 while (buf->b_u_oldhead != NULL)
|
|
758
|
1735 u_freeheader(buf, buf->b_u_oldhead, NULL);
|
|
359
|
1736 U_FREE_LINE(buf->b_u_line_ptr);
|
|
168
|
1737 }
|
|
|
1738
|
|
|
1739 #else
|
|
|
1740 /*
|
|
|
1741 * Storage allocation for the undo lines and blocks of the current file.
|
|
|
1742 * Version where Vim keeps track of the available memory.
|
|
7
|
1743 */
|
|
|
1744
|
|
|
1745 /*
|
|
|
1746 * Memory is allocated in relatively large blocks. These blocks are linked
|
|
|
1747 * in the allocated block list, headed by curbuf->b_block_head. They are all
|
|
|
1748 * freed when abandoning a file, so we don't have to free every single line.
|
|
|
1749 * The list is kept sorted on memory address.
|
|
|
1750 * block_alloc() allocates a block.
|
|
|
1751 * m_blockfree() frees all blocks.
|
|
|
1752 *
|
|
|
1753 * The available chunks of memory are kept in free chunk lists. There is
|
|
|
1754 * one free list for each block of allocated memory. The list is kept sorted
|
|
|
1755 * on memory address.
|
|
|
1756 * u_alloc_line() gets a chunk from the free lists.
|
|
|
1757 * u_free_line() returns a chunk to the free lists.
|
|
|
1758 * curbuf->b_m_search points to the chunk before the chunk that was
|
|
|
1759 * freed/allocated the last time.
|
|
|
1760 * curbuf->b_mb_current points to the b_head where curbuf->b_m_search
|
|
|
1761 * points into the free list.
|
|
|
1762 *
|
|
|
1763 *
|
|
|
1764 * b_block_head /---> block #1 /---> block #2
|
|
|
1765 * mb_next ---/ mb_next ---/ mb_next ---> NULL
|
|
|
1766 * mb_info mb_info mb_info
|
|
|
1767 * | | |
|
|
|
1768 * V V V
|
|
|
1769 * NULL free chunk #1.1 free chunk #2.1
|
|
|
1770 * | |
|
|
|
1771 * V V
|
|
|
1772 * free chunk #1.2 NULL
|
|
|
1773 * |
|
|
|
1774 * V
|
|
|
1775 * NULL
|
|
|
1776 *
|
|
|
1777 * When a single free chunk list would have been used, it could take a lot
|
|
|
1778 * of time in u_free_line() to find the correct place to insert a chunk in the
|
|
|
1779 * free list. The single free list would become very long when many lines are
|
|
|
1780 * changed (e.g. with :%s/^M$//).
|
|
|
1781 */
|
|
|
1782
|
|
|
1783 /*
|
|
|
1784 * this blocksize is used when allocating new lines
|
|
|
1785 */
|
|
|
1786 #define MEMBLOCKSIZE 2044
|
|
|
1787
|
|
|
1788 /*
|
|
|
1789 * The size field contains the size of the chunk, including the size field
|
|
|
1790 * itself.
|
|
|
1791 *
|
|
|
1792 * When the chunk is not in-use it is preceded with the m_info structure.
|
|
|
1793 * The m_next field links it in one of the free chunk lists.
|
|
|
1794 *
|
|
|
1795 * On most unix systems structures have to be longword (32 or 64 bit) aligned.
|
|
|
1796 * On most other systems they are short (16 bit) aligned.
|
|
|
1797 */
|
|
|
1798
|
|
|
1799 /* the structure definitions are now in structs.h */
|
|
|
1800
|
|
|
1801 #ifdef ALIGN_LONG
|
|
|
1802 /* size of m_size */
|
|
|
1803 # define M_OFFSET (sizeof(long_u))
|
|
|
1804 #else
|
|
|
1805 /* size of m_size */
|
|
|
1806 # define M_OFFSET (sizeof(short_u))
|
|
|
1807 #endif
|
|
|
1808
|
|
168
|
1809 static char_u *u_blockalloc __ARGS((long_u));
|
|
|
1810
|
|
7
|
1811 /*
|
|
|
1812 * Allocate a block of memory and link it in the allocated block list.
|
|
|
1813 */
|
|
|
1814 static char_u *
|
|
|
1815 u_blockalloc(size)
|
|
|
1816 long_u size;
|
|
|
1817 {
|
|
|
1818 mblock_T *p;
|
|
|
1819 mblock_T *mp, *next;
|
|
|
1820
|
|
|
1821 p = (mblock_T *)lalloc(size + sizeof(mblock_T), FALSE);
|
|
|
1822 if (p != NULL)
|
|
|
1823 {
|
|
|
1824 /* Insert the block into the allocated block list, keeping it
|
|
|
1825 sorted on address. */
|
|
|
1826 for (mp = &curbuf->b_block_head;
|
|
|
1827 (next = mp->mb_next) != NULL && next < p;
|
|
|
1828 mp = next)
|
|
|
1829 ;
|
|
|
1830 p->mb_next = next; /* link in block list */
|
|
|
1831 p->mb_size = size;
|
|
168
|
1832 p->mb_maxsize = 0; /* nothing free yet */
|
|
7
|
1833 mp->mb_next = p;
|
|
|
1834 p->mb_info.m_next = NULL; /* clear free list */
|
|
|
1835 p->mb_info.m_size = 0;
|
|
|
1836 curbuf->b_mb_current = p; /* remember current block */
|
|
|
1837 curbuf->b_m_search = NULL;
|
|
|
1838 p++; /* return usable memory */
|
|
|
1839 }
|
|
|
1840 return (char_u *)p;
|
|
|
1841 }
|
|
|
1842
|
|
|
1843 /*
|
|
|
1844 * free all allocated memory blocks for the buffer 'buf'
|
|
|
1845 */
|
|
|
1846 void
|
|
|
1847 u_blockfree(buf)
|
|
|
1848 buf_T *buf;
|
|
|
1849 {
|
|
|
1850 mblock_T *p, *np;
|
|
|
1851
|
|
|
1852 for (p = buf->b_block_head.mb_next; p != NULL; p = np)
|
|
|
1853 {
|
|
|
1854 np = p->mb_next;
|
|
|
1855 vim_free(p);
|
|
|
1856 }
|
|
|
1857 buf->b_block_head.mb_next = NULL;
|
|
|
1858 buf->b_m_search = NULL;
|
|
|
1859 buf->b_mb_current = NULL;
|
|
|
1860 }
|
|
|
1861
|
|
|
1862 /*
|
|
|
1863 * Free a chunk of memory for the current buffer.
|
|
|
1864 * Insert the chunk into the correct free list, keeping it sorted on address.
|
|
|
1865 */
|
|
|
1866 static void
|
|
|
1867 u_free_line(ptr, keep)
|
|
|
1868 char_u *ptr;
|
|
|
1869 int keep; /* don't free the block when it's empty */
|
|
|
1870 {
|
|
|
1871 minfo_T *next;
|
|
|
1872 minfo_T *prev, *curr;
|
|
|
1873 minfo_T *mp;
|
|
|
1874 mblock_T *nextb;
|
|
|
1875 mblock_T *prevb;
|
|
168
|
1876 long_u maxsize;
|
|
7
|
1877
|
|
|
1878 if (ptr == NULL || ptr == IObuff)
|
|
|
1879 return; /* illegal address can happen in out-of-memory situations */
|
|
|
1880
|
|
|
1881 mp = (minfo_T *)(ptr - M_OFFSET);
|
|
|
1882
|
|
|
1883 /* find block where chunk could be a part off */
|
|
|
1884 /* if we change curbuf->b_mb_current, curbuf->b_m_search is set to NULL */
|
|
|
1885 if (curbuf->b_mb_current == NULL || mp < (minfo_T *)curbuf->b_mb_current)
|
|
|
1886 {
|
|
|
1887 curbuf->b_mb_current = curbuf->b_block_head.mb_next;
|
|
|
1888 curbuf->b_m_search = NULL;
|
|
|
1889 }
|
|
|
1890 if ((nextb = curbuf->b_mb_current->mb_next) != NULL
|
|
|
1891 && (minfo_T *)nextb < mp)
|
|
|
1892 {
|
|
|
1893 curbuf->b_mb_current = nextb;
|
|
|
1894 curbuf->b_m_search = NULL;
|
|
|
1895 }
|
|
|
1896 while ((nextb = curbuf->b_mb_current->mb_next) != NULL
|
|
|
1897 && (minfo_T *)nextb < mp)
|
|
|
1898 curbuf->b_mb_current = nextb;
|
|
|
1899
|
|
|
1900 curr = NULL;
|
|
|
1901 /*
|
|
|
1902 * If mp is smaller than curbuf->b_m_search->m_next go to the start of
|
|
|
1903 * the free list
|
|
|
1904 */
|
|
|
1905 if (curbuf->b_m_search == NULL || mp < (curbuf->b_m_search->m_next))
|
|
|
1906 next = &(curbuf->b_mb_current->mb_info);
|
|
|
1907 else
|
|
|
1908 next = curbuf->b_m_search;
|
|
|
1909 /*
|
|
|
1910 * The following loop is executed very often.
|
|
|
1911 * Therefore it has been optimized at the cost of readability.
|
|
|
1912 * Keep it fast!
|
|
|
1913 */
|
|
|
1914 #ifdef SLOW_BUT_EASY_TO_READ
|
|
|
1915 do
|
|
|
1916 {
|
|
|
1917 prev = curr;
|
|
|
1918 curr = next;
|
|
|
1919 next = next->m_next;
|
|
|
1920 }
|
|
|
1921 while (mp > next && next != NULL);
|
|
|
1922 #else
|
|
|
1923 do /* first, middle, last */
|
|
|
1924 {
|
|
|
1925 prev = next->m_next; /* curr, next, prev */
|
|
|
1926 if (prev == NULL || mp <= prev)
|
|
|
1927 {
|
|
|
1928 prev = curr;
|
|
|
1929 curr = next;
|
|
|
1930 next = next->m_next;
|
|
|
1931 break;
|
|
|
1932 }
|
|
|
1933 curr = prev->m_next; /* next, prev, curr */
|
|
|
1934 if (curr == NULL || mp <= curr)
|
|
|
1935 {
|
|
|
1936 prev = next;
|
|
|
1937 curr = prev->m_next;
|
|
|
1938 next = curr->m_next;
|
|
|
1939 break;
|
|
|
1940 }
|
|
|
1941 next = curr->m_next; /* prev, curr, next */
|
|
|
1942 }
|
|
|
1943 while (mp > next && next != NULL);
|
|
|
1944 #endif
|
|
|
1945
|
|
|
1946 /* if *mp and *next are concatenated, join them into one chunk */
|
|
|
1947 if ((char_u *)mp + mp->m_size == (char_u *)next)
|
|
|
1948 {
|
|
|
1949 mp->m_size += next->m_size;
|
|
|
1950 mp->m_next = next->m_next;
|
|
|
1951 }
|
|
|
1952 else
|
|
|
1953 mp->m_next = next;
|
|
168
|
1954 maxsize = mp->m_size;
|
|
7
|
1955
|
|
|
1956 /* if *curr and *mp are concatenated, join them */
|
|
|
1957 if (prev != NULL && (char_u *)curr + curr->m_size == (char_u *)mp)
|
|
|
1958 {
|
|
|
1959 curr->m_size += mp->m_size;
|
|
168
|
1960 maxsize = curr->m_size;
|
|
7
|
1961 curr->m_next = mp->m_next;
|
|
|
1962 curbuf->b_m_search = prev;
|
|
|
1963 }
|
|
|
1964 else
|
|
|
1965 {
|
|
|
1966 curr->m_next = mp;
|
|
|
1967 curbuf->b_m_search = curr; /* put curbuf->b_m_search before freed
|
|
|
1968 chunk */
|
|
|
1969 }
|
|
|
1970
|
|
|
1971 /*
|
|
1210
|
1972 * If the block only contains free memory now, release it.
|
|
7
|
1973 */
|
|
|
1974 if (!keep && curbuf->b_mb_current->mb_size
|
|
|
1975 == curbuf->b_mb_current->mb_info.m_next->m_size)
|
|
|
1976 {
|
|
|
1977 /* Find the block before the current one to be able to unlink it from
|
|
|
1978 * the list of blocks. */
|
|
|
1979 prevb = &curbuf->b_block_head;
|
|
|
1980 for (nextb = prevb->mb_next; nextb != curbuf->b_mb_current;
|
|
|
1981 nextb = nextb->mb_next)
|
|
|
1982 prevb = nextb;
|
|
|
1983 prevb->mb_next = nextb->mb_next;
|
|
|
1984 vim_free(nextb);
|
|
|
1985 curbuf->b_mb_current = NULL;
|
|
|
1986 curbuf->b_m_search = NULL;
|
|
|
1987 }
|
|
168
|
1988 else if (curbuf->b_mb_current->mb_maxsize < maxsize)
|
|
|
1989 curbuf->b_mb_current->mb_maxsize = maxsize;
|
|
7
|
1990 }
|
|
|
1991
|
|
|
1992 /*
|
|
|
1993 * Allocate and initialize a new line structure with room for at least
|
|
|
1994 * 'size' characters plus a terminating NUL.
|
|
|
1995 */
|
|
|
1996 static char_u *
|
|
|
1997 u_alloc_line(size)
|
|
|
1998 unsigned size;
|
|
|
1999 {
|
|
|
2000 minfo_T *mp, *mprev, *mp2;
|
|
|
2001 mblock_T *mbp;
|
|
|
2002 int size_align;
|
|
|
2003
|
|
|
2004 /*
|
|
|
2005 * Add room for size field and trailing NUL byte.
|
|
|
2006 * Adjust for minimal size (must be able to store minfo_T
|
|
|
2007 * plus a trailing NUL, so the chunk can be released again)
|
|
|
2008 */
|
|
|
2009 size += M_OFFSET + 1;
|
|
|
2010 if (size < sizeof(minfo_T) + 1)
|
|
|
2011 size = sizeof(minfo_T) + 1;
|
|
|
2012
|
|
|
2013 /*
|
|
|
2014 * round size up for alignment
|
|
|
2015 */
|
|
|
2016 size_align = (size + ALIGN_MASK) & ~ALIGN_MASK;
|
|
|
2017
|
|
|
2018 /*
|
|
|
2019 * If curbuf->b_m_search is NULL (uninitialized free list) start at
|
|
|
2020 * curbuf->b_block_head
|
|
|
2021 */
|
|
|
2022 if (curbuf->b_mb_current == NULL || curbuf->b_m_search == NULL)
|
|
|
2023 {
|
|
|
2024 curbuf->b_mb_current = &curbuf->b_block_head;
|
|
|
2025 curbuf->b_m_search = &(curbuf->b_block_head.mb_info);
|
|
|
2026 }
|
|
|
2027
|
|
168
|
2028 /* Search for a block with enough space. */
|
|
7
|
2029 mbp = curbuf->b_mb_current;
|
|
168
|
2030 while (mbp->mb_maxsize < size_align)
|
|
7
|
2031 {
|
|
168
|
2032 if (mbp->mb_next != NULL)
|
|
7
|
2033 mbp = mbp->mb_next;
|
|
|
2034 else
|
|
|
2035 mbp = &curbuf->b_block_head;
|
|
168
|
2036 if (mbp == curbuf->b_mb_current)
|
|
7
|
2037 {
|
|
168
|
2038 int n = (size_align > (MEMBLOCKSIZE / 4)
|
|
|
2039 ? size_align : MEMBLOCKSIZE);
|
|
7
|
2040
|
|
168
|
2041 /* Back where we started in block list: need to add a new block
|
|
|
2042 * with enough space. */
|
|
|
2043 mp = (minfo_T *)u_blockalloc((long_u)n);
|
|
|
2044 if (mp == NULL)
|
|
|
2045 return (NULL);
|
|
|
2046 mp->m_size = n;
|
|
|
2047 u_free_line((char_u *)mp + M_OFFSET, TRUE);
|
|
|
2048 mbp = curbuf->b_mb_current;
|
|
|
2049 break;
|
|
|
2050 }
|
|
|
2051 }
|
|
|
2052 if (mbp != curbuf->b_mb_current)
|
|
|
2053 curbuf->b_m_search = &(mbp->mb_info);
|
|
|
2054
|
|
|
2055 /* In this block find a chunk with enough space. */
|
|
|
2056 mprev = curbuf->b_m_search;
|
|
|
2057 mp = curbuf->b_m_search->m_next;
|
|
407
|
2058 for (;;)
|
|
168
|
2059 {
|
|
|
2060 if (mp == NULL) /* at end of the list */
|
|
|
2061 mp = &(mbp->mb_info); /* wrap around to begin */
|
|
|
2062 if (mp->m_size >= size)
|
|
|
2063 break;
|
|
|
2064 if (mp == curbuf->b_m_search)
|
|
|
2065 {
|
|
|
2066 /* back where we started in free chunk list: "cannot happen" */
|
|
|
2067 EMSG2(_(e_intern2), "u_alloc_line()");
|
|
|
2068 return NULL;
|
|
7
|
2069 }
|
|
|
2070 mprev = mp;
|
|
168
|
2071 mp = mp->m_next;
|
|
7
|
2072 }
|
|
|
2073
|
|
168
|
2074 /* when using the largest chunk adjust mb_maxsize */
|
|
|
2075 if (mp->m_size >= mbp->mb_maxsize)
|
|
|
2076 mbp->mb_maxsize = 0;
|
|
|
2077
|
|
7
|
2078 /* if the chunk we found is large enough, split it up in two */
|
|
|
2079 if ((long)mp->m_size - size_align >= (long)(sizeof(minfo_T) + 1))
|
|
|
2080 {
|
|
|
2081 mp2 = (minfo_T *)((char_u *)mp + size_align);
|
|
|
2082 mp2->m_size = mp->m_size - size_align;
|
|
|
2083 mp2->m_next = mp->m_next;
|
|
|
2084 mprev->m_next = mp2;
|
|
|
2085 mp->m_size = size_align;
|
|
|
2086 }
|
|
|
2087 else /* remove *mp from the free list */
|
|
|
2088 {
|
|
|
2089 mprev->m_next = mp->m_next;
|
|
|
2090 }
|
|
|
2091 curbuf->b_m_search = mprev;
|
|
|
2092 curbuf->b_mb_current = mbp;
|
|
|
2093
|
|
168
|
2094 /* If using the largest chunk need to find the new largest chunk */
|
|
|
2095 if (mbp->mb_maxsize == 0)
|
|
|
2096 for (mp2 = &(mbp->mb_info); mp2 != NULL; mp2 = mp2->m_next)
|
|
|
2097 if (mbp->mb_maxsize < mp2->m_size)
|
|
|
2098 mbp->mb_maxsize = mp2->m_size;
|
|
|
2099
|
|
7
|
2100 mp = (minfo_T *)((char_u *)mp + M_OFFSET);
|
|
|
2101 *(char_u *)mp = NUL; /* set the first byte to NUL */
|
|
|
2102
|
|
|
2103 return ((char_u *)mp);
|
|
|
2104 }
|
|
168
|
2105 #endif
|
|
7
|
2106
|
|
|
2107 /*
|
|
|
2108 * u_save_line(): allocate memory with u_alloc_line() and copy line 'lnum'
|
|
|
2109 * into it.
|
|
|
2110 */
|
|
|
2111 static char_u *
|
|
|
2112 u_save_line(lnum)
|
|
|
2113 linenr_T lnum;
|
|
|
2114 {
|
|
|
2115 char_u *src;
|
|
|
2116 char_u *dst;
|
|
|
2117 unsigned len;
|
|
|
2118
|
|
|
2119 src = ml_get(lnum);
|
|
|
2120 len = (unsigned)STRLEN(src);
|
|
168
|
2121 if ((dst = U_ALLOC_LINE(len)) != NULL)
|
|
7
|
2122 mch_memmove(dst, src, (size_t)(len + 1));
|
|
|
2123 return (dst);
|
|
|
2124 }
|
|
|
2125
|
|
|
2126 /*
|
|
|
2127 * Check if the 'modified' flag is set, or 'ff' has changed (only need to
|
|
|
2128 * check the first character, because it can only be "dos", "unix" or "mac").
|
|
|
2129 * "nofile" and "scratch" type buffers are considered to always be unchanged.
|
|
|
2130 */
|
|
|
2131 int
|
|
|
2132 bufIsChanged(buf)
|
|
|
2133 buf_T *buf;
|
|
|
2134 {
|
|
|
2135 return
|
|
|
2136 #ifdef FEAT_QUICKFIX
|
|
|
2137 !bt_dontwrite(buf) &&
|
|
|
2138 #endif
|
|
|
2139 (buf->b_changed || file_ff_differs(buf));
|
|
|
2140 }
|
|
|
2141
|
|
|
2142 int
|
|
|
2143 curbufIsChanged()
|
|
|
2144 {
|
|
|
2145 return
|
|
|
2146 #ifdef FEAT_QUICKFIX
|
|
|
2147 !bt_dontwrite(curbuf) &&
|
|
|
2148 #endif
|
|
|
2149 (curbuf->b_changed || file_ff_differs(curbuf));
|
|
|
2150 }
|
