Mercurial > vim
annotate src/channel.c @ 7788:192ae655ac91 v7.4.1191
commit https://github.com/vim/vim/commit/3b5f929b18492fec291d1ec95a91f54e5912c03b
Author: Bram Moolenaar <Bram@vim.org>
Date: Thu Jan 28 22:37:01 2016 +0100
patch 7.4.1191
Problem: The channel feature isn't working yet.
Solution: Add the connect(), disconnect(), sendexpr() and sendraw()
functions. Add initial documentation. Add a demo server.
author | Christian Brabandt <cb@256bit.org> |
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date | Thu, 28 Jan 2016 22:45:04 +0100 |
parents | e09af43f98f7 |
children | 2981a37cec61 |
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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 */ |
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8 |
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9 /* |
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10 * Implements communication through a socket or any file handle. |
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11 */ |
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12 |
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13 #include "vim.h" |
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14 |
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15 #if defined(FEAT_CHANNEL) || defined(PROTO) |
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16 |
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17 /* |
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18 * Change the zero to 1 to enable debugging. |
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19 * This will write a file "channel_debug.log". |
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20 */ |
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21 #if 0 |
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22 # define CHERROR(fmt, arg) cherror(fmt, arg) |
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23 # define CHLOG(idx, send, buf) chlog(idx, send, buf) |
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24 # define CHFILE "channel_debug.log" |
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25 |
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26 static void cherror(char *fmt, char *arg); |
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27 static void chlog(int send, char_u *buf); |
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28 #else |
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29 # define CHERROR(fmt, arg) |
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30 # define CHLOG(idx, send, buf) |
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31 #endif |
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32 |
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33 /* TRUE when netbeans is running with a GUI. */ |
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34 #ifdef FEAT_GUI |
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35 # define CH_HAS_GUI (gui.in_use || gui.starting) |
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36 #endif |
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37 |
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38 /* Note: when making changes here also adjust configure.in. */ |
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39 #ifdef WIN32 |
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40 /* WinSock API is separated from C API, thus we can't use read(), write(), |
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41 * errno... */ |
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42 # define SOCK_ERRNO errno = WSAGetLastError() |
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43 # undef ECONNREFUSED |
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44 # define ECONNREFUSED WSAECONNREFUSED |
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45 # ifdef EINTR |
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46 # undef EINTR |
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47 # endif |
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48 # define EINTR WSAEINTR |
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49 # define sock_write(sd, buf, len) send(sd, buf, len, 0) |
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50 # define sock_read(sd, buf, len) recv(sd, buf, len, 0) |
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51 # define sock_close(sd) closesocket(sd) |
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52 # define sleep(t) Sleep(t*1000) /* WinAPI Sleep() accepts milliseconds */ |
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53 #else |
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54 # include <netdb.h> |
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55 # include <netinet/in.h> |
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56 |
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57 # include <sys/socket.h> |
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58 # ifdef HAVE_LIBGEN_H |
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59 # include <libgen.h> |
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60 # endif |
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61 # define SOCK_ERRNO |
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62 # define sock_write(sd, buf, len) write(sd, buf, len) |
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63 # define sock_read(sd, buf, len) read(sd, buf, len) |
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64 # define sock_close(sd) close(sd) |
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65 #endif |
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66 |
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67 #ifdef FEAT_GUI_W32 |
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68 extern HWND s_hwnd; /* Gvim's Window handle */ |
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69 #endif |
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70 |
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71 struct readqueue |
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72 { |
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73 char_u *buffer; |
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74 struct readqueue *next; |
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75 struct readqueue *prev; |
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76 }; |
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77 typedef struct readqueue queue_T; |
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78 |
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79 typedef struct { |
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80 sock_T ch_fd; /* the socket, -1 for a closed channel */ |
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81 int ch_idx; /* used by channel_poll_setup() */ |
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82 queue_T ch_head; /* dummy node, header for circular queue */ |
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83 |
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84 int ch_error; /* When TRUE an error was reported. Avoids giving |
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85 * pages full of error messages when the other side |
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86 * has exited, only mention the first error until the |
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87 * connection works again. */ |
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88 #ifdef FEAT_GUI_X11 |
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89 XtInputId ch_inputHandler; /* Cookie for input */ |
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90 #endif |
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91 #ifdef FEAT_GUI_GTK |
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92 gint ch_inputHandler; /* Cookie for input */ |
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93 #endif |
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94 #ifdef FEAT_GUI_W32 |
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95 int ch_inputHandler; /* simply ret.value of WSAAsyncSelect() */ |
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96 #endif |
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97 |
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98 void (*ch_close_cb)(void); /* callback for when channel is closed */ |
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99 |
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100 char_u *ch_callback; /* function to call when a msg is not handled */ |
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101 char_u *ch_req_callback; /* function to call for current request */ |
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102 int ch_will_block; /* do not use callback right now */ |
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103 |
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104 int ch_json_mode; |
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105 } channel_T; |
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106 |
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107 /* |
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108 * Information about all channels. |
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109 * There can be gaps for closed channels, they will be reused later. |
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110 */ |
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111 static channel_T *channels = NULL; |
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112 static int channel_count = 0; |
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113 |
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114 /* |
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115 * TODO: open debug file when desired. |
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116 */ |
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117 FILE *debugfd = NULL; |
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118 |
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119 /* |
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120 * Add a new channel slot, return the index. |
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121 * The channel isn't actually used into ch_fd is set >= 0; |
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122 * Returns -1 if all channels are in use. |
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123 */ |
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124 static int |
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125 add_channel(void) |
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126 { |
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127 int idx; |
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128 channel_T *new_channels; |
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129 |
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130 if (channels != NULL) |
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131 for (idx = 0; idx < channel_count; ++idx) |
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132 if (channels[idx].ch_fd < 0) |
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133 /* re-use a closed channel slot */ |
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134 return idx; |
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135 if (channel_count == MAX_OPEN_CHANNELS) |
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136 return -1; |
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137 new_channels = (channel_T *)alloc(sizeof(channel_T) * (channel_count + 1)); |
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138 if (new_channels == NULL) |
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139 return -1; |
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140 if (channels != NULL) |
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141 mch_memmove(new_channels, channels, sizeof(channel_T) * channel_count); |
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142 channels = new_channels; |
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143 (void)vim_memset(&channels[channel_count], 0, sizeof(channel_T)); |
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144 |
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145 channels[channel_count].ch_fd = (sock_T)-1; |
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146 #ifdef FEAT_GUI_X11 |
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147 channels[channel_count].ch_inputHandler = (XtInputId)NULL; |
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148 #endif |
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149 #ifdef FEAT_GUI_GTK |
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150 channels[channel_count].ch_inputHandler = 0; |
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151 #endif |
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152 #ifdef FEAT_GUI_W32 |
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153 channels[channel_count].ch_inputHandler = -1; |
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154 #endif |
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155 |
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156 return channel_count++; |
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157 } |
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158 |
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159 #if defined(FEAT_GUI) || defined(PROTO) |
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160 /* |
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161 * Read a command from netbeans. |
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162 */ |
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163 #ifdef FEAT_GUI_X11 |
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164 static void |
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165 messageFromNetbeans(XtPointer clientData, |
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166 int *unused1 UNUSED, |
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167 XtInputId *unused2 UNUSED) |
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168 { |
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169 channel_read((int)(long)clientData); |
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170 } |
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171 #endif |
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172 |
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173 #ifdef FEAT_GUI_GTK |
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174 static void |
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175 messageFromNetbeans(gpointer clientData, |
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176 gint unused1 UNUSED, |
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177 GdkInputCondition unused2 UNUSED) |
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178 { |
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179 channel_read((int)(long)clientData); |
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180 } |
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181 #endif |
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182 |
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183 static void |
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184 channel_gui_register(int idx) |
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185 { |
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186 channel_T *channel = &channels[idx]; |
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187 |
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188 if (!CH_HAS_GUI) |
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189 return; |
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190 |
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191 # ifdef FEAT_GUI_X11 |
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192 /* tell notifier we are interested in being called |
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193 * when there is input on the editor connection socket |
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194 */ |
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195 if (channel->ch_inputHandler == (XtInputId)NULL) |
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196 channel->ch_inputHandler = |
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197 XtAppAddInput((XtAppContext)app_context, channel->ch_fd, |
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198 (XtPointer)(XtInputReadMask + XtInputExceptMask), |
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199 messageFromNetbeans, (XtPointer)(long)idx); |
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200 # else |
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201 # ifdef FEAT_GUI_GTK |
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202 /* |
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203 * Tell gdk we are interested in being called when there |
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204 * is input on the editor connection socket |
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205 */ |
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206 if (channel->ch_inputHandler == 0) |
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207 channel->ch_inputHandler = |
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208 gdk_input_add((gint)channel->ch_fd, (GdkInputCondition) |
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209 ((int)GDK_INPUT_READ + (int)GDK_INPUT_EXCEPTION), |
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210 messageFromNetbeans, (gpointer)(long)idx); |
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211 # else |
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212 # ifdef FEAT_GUI_W32 |
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213 /* |
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214 * Tell Windows we are interested in receiving message when there |
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215 * is input on the editor connection socket. |
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216 */ |
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217 if (channel->ch_inputHandler == -1) |
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218 channel->ch_inputHandler = |
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219 WSAAsyncSelect(channel->ch_fd, s_hwnd, WM_NETBEANS, FD_READ); |
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220 # endif |
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221 # endif |
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222 # endif |
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223 } |
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224 |
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225 /* |
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226 * Register any of our file descriptors with the GUI event handling system. |
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227 * Called when the GUI has started. |
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228 */ |
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229 void |
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230 channel_gui_register_all(void) |
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231 { |
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232 int i; |
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233 |
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234 for (i = 0; i < channel_count; ++i) |
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235 if (channels[i].ch_fd >= 0) |
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236 channel_gui_register(i); |
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237 } |
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238 |
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239 static void |
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240 channel_gui_unregister(int idx) |
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241 { |
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242 channel_T *channel = &channels[idx]; |
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243 |
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244 # ifdef FEAT_GUI_X11 |
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245 if (channel->ch_inputHandler != (XtInputId)NULL) |
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246 { |
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247 XtRemoveInput(channel->ch_inputHandler); |
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248 channel->ch_inputHandler = (XtInputId)NULL; |
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249 } |
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250 # else |
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251 # ifdef FEAT_GUI_GTK |
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252 if (channel->ch_inputHandler != 0) |
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253 { |
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254 gdk_input_remove(channel->ch_inputHandler); |
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255 channel->ch_inputHandler = 0; |
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256 } |
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257 # else |
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258 # ifdef FEAT_GUI_W32 |
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259 if (channel->ch_inputHandler == 0) |
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260 { |
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261 WSAAsyncSelect(channel->ch_fd, s_hwnd, 0, 0); |
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262 channel->ch_inputHandler = -1; |
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263 } |
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264 # endif |
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265 # endif |
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266 # endif |
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267 } |
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268 |
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269 #endif |
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270 |
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271 /* |
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272 * Open a channel to "hostname":"port". |
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273 * Returns the channel number for success. |
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274 * Returns a negative number for failure. |
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275 */ |
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276 int |
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277 channel_open(char *hostname, int port_in, void (*close_cb)(void)) |
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278 { |
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279 int sd; |
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280 struct sockaddr_in server; |
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281 struct hostent * host; |
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282 #ifdef FEAT_GUI_W32 |
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283 u_short port = port_in; |
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284 #else |
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285 int port = port_in; |
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286 #endif |
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287 int idx; |
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288 |
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289 #ifdef FEAT_GUI_W32 |
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290 channel_init_winsock(); |
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291 #endif |
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292 |
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293 idx = add_channel(); |
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294 if (idx < 0) |
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295 { |
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296 CHERROR("All channels are in use\n", ""); |
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297 EMSG(_("E999: All channels are in use")); |
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298 return -1; |
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299 } |
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300 |
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301 if ((sd = (sock_T)socket(AF_INET, SOCK_STREAM, 0)) == (sock_T)-1) |
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302 { |
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303 CHERROR("error in socket() in channel_open()\n", ""); |
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304 PERROR("E999: socket() in channel_open()"); |
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305 return -1; |
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306 } |
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307 |
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308 /* Get the server internet address and put into addr structure */ |
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309 /* fill in the socket address structure and connect to server */ |
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310 vim_memset((char *)&server, 0, sizeof(server)); |
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311 server.sin_family = AF_INET; |
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312 server.sin_port = htons(port); |
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313 if ((host = gethostbyname(hostname)) == NULL) |
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314 { |
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315 CHERROR("error in gethostbyname() in channel_open()\n", ""); |
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316 PERROR("E999: gethostbyname() in channel_open()"); |
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317 sock_close(sd); |
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318 return -1; |
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319 } |
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320 memcpy((char *)&server.sin_addr, host->h_addr, host->h_length); |
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321 |
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322 /* Connect to server */ |
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323 if (connect(sd, (struct sockaddr *)&server, sizeof(server))) |
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324 { |
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325 SOCK_ERRNO; |
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326 CHERROR("channel_open: Connect failed with errno %d\n", errno); |
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327 if (errno == ECONNREFUSED) |
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328 { |
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329 sock_close(sd); |
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330 if ((sd = (sock_T)socket(AF_INET, SOCK_STREAM, 0)) == (sock_T)-1) |
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331 { |
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332 SOCK_ERRNO; |
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333 CHERROR("socket() retry in channel_open()\n", ""); |
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334 PERROR("E999: socket() retry in channel_open()"); |
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335 return -1; |
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336 } |
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337 if (connect(sd, (struct sockaddr *)&server, sizeof(server))) |
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338 { |
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339 int retries = 36; |
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340 int success = FALSE; |
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341 |
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342 SOCK_ERRNO; |
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343 while (retries-- && ((errno == ECONNREFUSED) |
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344 || (errno == EINTR))) |
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345 { |
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346 CHERROR("retrying...\n", ""); |
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347 mch_delay(3000L, TRUE); |
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348 ui_breakcheck(); |
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349 if (got_int) |
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350 { |
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351 errno = EINTR; |
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352 break; |
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353 } |
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354 if (connect(sd, (struct sockaddr *)&server, |
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355 sizeof(server)) == 0) |
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356 { |
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357 success = TRUE; |
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358 break; |
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359 } |
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360 SOCK_ERRNO; |
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361 } |
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362 if (!success) |
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363 { |
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364 /* Get here when the server can't be found. */ |
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365 CHERROR("Cannot connect to port after retry\n", ""); |
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366 PERROR(_("E999: Cannot connect to port after retry2")); |
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367 sock_close(sd); |
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368 return -1; |
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369 } |
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370 } |
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371 } |
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372 else |
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373 { |
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374 CHERROR("Cannot connect to port\n", ""); |
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375 PERROR(_("E999: Cannot connect to port")); |
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376 sock_close(sd); |
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377 return -1; |
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378 } |
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379 } |
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380 |
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381 channels[idx].ch_fd = sd; |
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382 channels[idx].ch_close_cb = close_cb; |
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383 |
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384 #ifdef FEAT_GUI |
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385 channel_gui_register(idx); |
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386 #endif |
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387 |
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388 return idx; |
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389 } |
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390 |
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391 /* |
7788
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392 * Set the json mode of channel "idx" to TRUE or FALSE. |
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393 */ |
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394 void |
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395 channel_set_json_mode(int idx, int json_mode) |
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396 { |
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397 channels[idx].ch_json_mode = json_mode; |
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398 } |
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399 |
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400 /* |
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401 * Set the callback for channel "idx". |
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402 */ |
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403 void |
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404 channel_set_callback(int idx, char_u *callback) |
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405 { |
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406 vim_free(channels[idx].ch_callback); |
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407 channels[idx].ch_callback = vim_strsave(callback); |
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408 } |
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409 |
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410 /* |
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411 * Set the callback for channel "idx" for the next response. |
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412 */ |
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413 void |
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414 channel_set_req_callback(int idx, char_u *callback) |
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415 { |
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416 vim_free(channels[idx].ch_req_callback); |
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417 channels[idx].ch_req_callback = callback == NULL |
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418 ? NULL : vim_strsave(callback); |
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419 } |
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420 |
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421 /* |
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422 * Set the flag that the callback for channel "idx" should not be used now. |
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423 */ |
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424 void |
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425 channel_will_block(int idx) |
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426 { |
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427 channels[idx].ch_will_block = TRUE; |
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428 } |
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429 |
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430 /* |
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431 * Decode JSON "msg", which must have the form "[nr, expr]". |
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432 * Put "expr" in "tv". |
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433 * Return OK or FAIL. |
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434 */ |
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435 int |
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436 channel_decode_json(char_u *msg, typval_T *tv) |
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437 { |
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438 js_read_T reader; |
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439 typval_T listtv; |
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440 |
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441 reader.js_buf = msg; |
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442 reader.js_eof = TRUE; |
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443 reader.js_used = 0; |
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444 json_decode(&reader, &listtv); |
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445 /* TODO: use the sequence number */ |
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446 if (listtv.v_type == VAR_LIST |
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447 && listtv.vval.v_list->lv_len == 2 |
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448 && listtv.vval.v_list->lv_first->li_tv.v_type == VAR_NUMBER) |
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449 { |
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450 /* Move the item from the list and then change the type to avoid the |
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451 * item being freed. */ |
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452 *tv = listtv.vval.v_list->lv_last->li_tv; |
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453 listtv.vval.v_list->lv_last->li_tv.v_type = VAR_NUMBER; |
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454 list_unref(listtv.vval.v_list); |
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455 return OK; |
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456 } |
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457 |
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458 /* give error message? */ |
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459 clear_tv(&listtv); |
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460 return FAIL; |
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461 } |
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462 |
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463 /* |
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464 * Invoke the "callback" on channel "idx". |
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465 */ |
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466 static void |
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467 invoke_callback(int idx, char_u *callback) |
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468 { |
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469 typval_T argv[3]; |
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470 typval_T rettv; |
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471 int dummy; |
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472 char_u *msg; |
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473 int ret = OK; |
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474 |
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475 argv[0].v_type = VAR_NUMBER; |
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476 argv[0].vval.v_number = idx; |
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477 |
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478 /* Concatenate everything into one buffer. |
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479 * TODO: only read what the callback will use. |
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480 * TODO: avoid multiple allocations. */ |
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481 while (channel_collapse(idx) == OK) |
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482 ; |
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483 msg = channel_get(idx); |
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484 |
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485 if (channels[idx].ch_json_mode) |
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486 ret = channel_decode_json(msg, &argv[1]); |
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487 else |
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488 { |
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489 argv[1].v_type = VAR_STRING; |
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490 argv[1].vval.v_string = msg; |
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491 } |
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492 |
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493 if (ret == OK) |
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494 { |
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495 call_func(callback, (int)STRLEN(callback), |
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496 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL); |
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497 /* If an echo command was used the cursor needs to be put back where |
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498 * it belongs. */ |
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499 setcursor(); |
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500 cursor_on(); |
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501 out_flush(); |
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502 } |
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503 vim_free(msg); |
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504 } |
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505 |
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506 /* |
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507 * Invoke a callback for channel "idx" if needed. |
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508 */ |
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509 static void |
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510 may_invoke_callback(int idx) |
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511 { |
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512 if (channels[idx].ch_will_block) |
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513 return; |
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514 if (channel_peek(idx) == NULL) |
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515 return; |
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516 |
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517 if (channels[idx].ch_req_callback != NULL) |
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518 { |
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519 /* invoke the one-time callback */ |
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520 invoke_callback(idx, channels[idx].ch_req_callback); |
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521 channels[idx].ch_req_callback = NULL; |
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522 return; |
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523 } |
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524 |
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525 if (channels[idx].ch_callback != NULL) |
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526 /* invoke the channel callback */ |
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527 invoke_callback(idx, channels[idx].ch_callback); |
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528 } |
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529 |
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530 /* |
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531 * Return TRUE when channel "idx" is open. |
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532 * Also returns FALSE or invalid "idx". |
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533 */ |
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534 int |
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535 channel_is_open(int idx) |
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536 { |
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537 return idx >= 0 && idx < channel_count && channels[idx].ch_fd >= 0; |
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538 } |
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539 |
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540 /* |
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541 * Close channel "idx". |
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542 * This does not trigger the close callback. |
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543 */ |
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544 void |
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545 channel_close(int idx) |
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546 { |
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547 channel_T *channel = &channels[idx]; |
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548 |
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549 if (channel->ch_fd >= 0) |
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550 { |
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551 sock_close(channel->ch_fd); |
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552 channel->ch_fd = -1; |
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553 #ifdef FEAT_GUI |
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554 channel_gui_unregister(idx); |
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555 #endif |
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556 vim_free(channel->ch_callback); |
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557 channel->ch_callback = NULL; |
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558 } |
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559 } |
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560 |
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561 /* |
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562 * Store "buf[len]" on channel "idx". |
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563 */ |
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564 void |
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565 channel_save(int idx, char_u *buf, int len) |
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566 { |
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567 queue_T *node; |
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568 queue_T *head = &channels[idx].ch_head; |
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569 |
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570 node = (queue_T *)alloc(sizeof(queue_T)); |
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571 if (node == NULL) |
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572 return; /* out of memory */ |
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573 node->buffer = alloc(len + 1); |
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574 if (node->buffer == NULL) |
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575 { |
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576 vim_free(node); |
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577 return; /* out of memory */ |
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578 } |
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579 mch_memmove(node->buffer, buf, (size_t)len); |
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580 node->buffer[len] = NUL; |
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581 |
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582 if (head->next == NULL) /* initialize circular queue */ |
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583 { |
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584 head->next = head; |
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585 head->prev = head; |
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586 } |
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587 |
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588 /* insert node at tail of queue */ |
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589 node->next = head; |
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590 node->prev = head->prev; |
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591 head->prev->next = node; |
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592 head->prev = node; |
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593 |
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594 if (debugfd != NULL) |
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595 { |
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596 fprintf(debugfd, "RECV on %d: ", idx); |
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597 fwrite(buf, len, 1, debugfd); |
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598 fprintf(debugfd, "\n"); |
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599 } |
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600 } |
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601 |
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602 /* |
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603 * Return the first buffer from the channel without removing it. |
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604 * Returns NULL if there is nothing. |
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605 */ |
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606 char_u * |
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607 channel_peek(int idx) |
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608 { |
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609 queue_T *head = &channels[idx].ch_head; |
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610 |
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611 if (head->next == head || head->next == NULL) |
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612 return NULL; |
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613 return head->next->buffer; |
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614 } |
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615 |
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616 /* |
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617 * Return the first buffer from the channel and remove it. |
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618 * The caller must free it. |
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619 * Returns NULL if there is nothing. |
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620 */ |
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621 char_u * |
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622 channel_get(int idx) |
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623 { |
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624 queue_T *head = &channels[idx].ch_head; |
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625 queue_T *node; |
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626 char_u *p; |
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627 |
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628 if (head->next == head || head->next == NULL) |
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629 return NULL; |
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630 node = head->next; |
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631 /* dispose of the node but keep the buffer */ |
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632 p = node->buffer; |
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633 head->next = node->next; |
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634 node->next->prev = node->prev; |
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635 vim_free(node); |
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636 return p; |
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637 } |
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638 |
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639 /* |
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640 * Collapses the first and second buffer in the channel "idx". |
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641 * Returns FAIL if that is not possible. |
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642 */ |
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643 int |
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644 channel_collapse(int idx) |
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645 { |
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646 queue_T *head = &channels[idx].ch_head; |
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647 queue_T *node = head->next; |
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648 char_u *p; |
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649 |
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650 if (node == head || node == NULL || node->next == head) |
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651 return FAIL; |
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652 |
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653 p = alloc((unsigned)(STRLEN(node->buffer) |
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654 + STRLEN(node->next->buffer) + 1)); |
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655 if (p == NULL) |
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656 return FAIL; /* out of memory */ |
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657 STRCPY(p, node->buffer); |
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658 STRCAT(p, node->next->buffer); |
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659 vim_free(node->next->buffer); |
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660 node->next->buffer = p; |
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661 |
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662 /* dispose of the node and buffer */ |
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663 head->next = node->next; |
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664 node->next->prev = node->prev; |
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665 vim_free(node->buffer); |
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666 vim_free(node); |
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667 return OK; |
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668 } |
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669 |
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670 /* |
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671 * Clear the read buffer on channel "idx". |
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672 */ |
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673 void |
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674 channel_clear(int idx) |
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675 { |
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676 queue_T *head = &channels[idx].ch_head; |
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677 queue_T *node = head->next; |
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678 queue_T *next; |
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679 |
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680 while (node != NULL && node != head) |
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681 { |
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682 next = node->next; |
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683 vim_free(node->buffer); |
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684 vim_free(node); |
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685 if (next == head) |
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686 { |
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687 head->next = head; |
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688 head->prev = head; |
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689 break; |
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690 } |
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691 node = next; |
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692 } |
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693 } |
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694 |
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695 /* Sent when the channel is found closed when reading. */ |
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696 #define DETACH_MSG "\"DETACH\"\n" |
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697 |
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698 /* Buffer size for reading incoming messages. */ |
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699 #define MAXMSGSIZE 4096 |
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700 |
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701 /* |
7788
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702 * Check for reading from "fd" with "timeout" msec. |
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703 * Return FAIL when there is nothing to read. |
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704 */ |
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705 static int |
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706 channel_wait(int fd, int timeout) |
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707 { |
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708 #ifdef HAVE_SELECT |
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709 struct timeval tval; |
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710 fd_set rfds; |
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711 int ret; |
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712 |
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713 FD_ZERO(&rfds); |
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714 FD_SET(fd, &rfds); |
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715 tval.tv_sec = timeout / 1000; |
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716 tval.tv_usec = (timeout % 1000) * 1000; |
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717 for (;;) |
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718 { |
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719 ret = select(fd + 1, &rfds, NULL, NULL, &tval); |
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720 # ifdef EINTR |
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721 if (ret == -1 && errno == EINTR) |
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722 continue; |
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723 # endif |
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724 if (ret <= 0) |
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725 return FAIL; |
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726 break; |
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727 } |
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728 #else |
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729 struct pollfd fds; |
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730 |
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731 fds.fd = fd; |
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732 fds.events = POLLIN; |
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733 if (poll(&fds, 1, timeout) <= 0) |
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734 return FAIL; |
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735 #endif |
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736 return OK; |
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737 } |
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738 |
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739 /* |
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740 * Return a unique ID to be used in a message. |
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741 */ |
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742 int |
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743 channel_get_id() |
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744 { |
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745 static int next_id = 1; |
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746 |
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747 return next_id++; |
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748 } |
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749 |
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750 /* |
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751 * Read from channel "idx" for as long as there is something to read. |
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752 * The data is put in the read queue. |
7770
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753 */ |
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|
754 void |
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755 channel_read(int idx) |
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756 { |
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757 static char_u *buf = NULL; |
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758 int len = 0; |
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759 int readlen = 0; |
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760 channel_T *channel = &channels[idx]; |
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761 |
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762 if (channel->ch_fd < 0) |
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763 { |
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764 CHLOG(idx, FALSE, "channel_read() called while socket is closed\n"); |
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765 return; |
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766 } |
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767 |
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768 /* Allocate a buffer to read into. */ |
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769 if (buf == NULL) |
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770 { |
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771 buf = alloc(MAXMSGSIZE); |
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772 if (buf == NULL) |
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773 return; /* out of memory! */ |
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774 } |
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775 |
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776 /* Keep on reading for as long as there is something to read. |
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777 * Use select() or poll() to avoid blocking on a message that is exactly |
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778 * MAXMSGSIZE long. */ |
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779 for (;;) |
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780 { |
7788
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781 if (channel_wait(channel->ch_fd, 0) == FAIL) |
7770
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782 break; |
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783 len = sock_read(channel->ch_fd, buf, MAXMSGSIZE); |
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784 if (len <= 0) |
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785 break; /* error or nothing more to read */ |
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786 |
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787 /* Store the read message in the queue. */ |
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788 channel_save(idx, buf, len); |
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789 readlen += len; |
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790 if (len < MAXMSGSIZE) |
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791 break; /* did read everything that's available */ |
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792 } |
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793 |
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794 /* Reading a socket disconnection (readlen == 0), or a socket error. */ |
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795 if (readlen <= 0) |
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796 { |
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797 /* Queue a "DETACH" netbeans message in the command queue in order to |
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798 * terminate the netbeans session later. Do not end the session here |
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799 * directly as we may be running in the context of a call to |
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800 * netbeans_parse_messages(): |
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801 * netbeans_parse_messages |
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802 * -> autocmd triggered while processing the netbeans cmd |
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803 * -> ui_breakcheck |
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804 * -> gui event loop or select loop |
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805 * -> channel_read() |
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806 */ |
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807 channel_save(idx, (char_u *)DETACH_MSG, (int)STRLEN(DETACH_MSG)); |
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808 |
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809 channel_close(idx); |
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810 if (channel->ch_close_cb != NULL) |
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811 (*channel->ch_close_cb)(); |
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812 |
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813 if (len < 0) |
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814 { |
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815 /* Todo: which channel? */ |
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816 CHERROR("%s(): cannot from channel\n", "channel_read"); |
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817 PERROR(_("E999: read from channel")); |
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818 } |
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819 } |
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820 |
7788
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821 may_invoke_callback(idx); |
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822 |
7770
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823 #if defined(CH_HAS_GUI) && defined(FEAT_GUI_GTK) |
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824 if (CH_HAS_GUI && gtk_main_level() > 0) |
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825 gtk_main_quit(); |
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826 #endif |
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827 } |
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828 |
7788
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829 /* |
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830 * Read from channel "idx". Blocks until there is something to read or the |
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831 * timeout expires. |
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832 * Returns what was read in allocated memory. |
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833 * Returns NULL in case of error or timeout. |
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834 */ |
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835 char_u * |
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836 channel_read_block(int idx) |
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837 { |
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838 if (channel_peek(idx) == NULL) |
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839 { |
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840 /* Wait for up to 2 seconds. |
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841 * TODO: use timeout set on the channel. */ |
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842 if (channel_wait(channels[idx].ch_fd, 2000) == FAIL) |
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843 { |
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844 channels[idx].ch_will_block = FALSE; |
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845 return NULL; |
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846 } |
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847 channel_read(idx); |
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848 } |
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849 |
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850 /* Concatenate everything into one buffer. |
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851 * TODO: avoid multiple allocations. */ |
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852 while (channel_collapse(idx) == OK) |
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853 ; |
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854 |
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855 channels[idx].ch_will_block = FALSE; |
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856 return channel_get(idx); |
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857 } |
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858 |
7780
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859 # if defined(FEAT_GUI_W32) || defined(PROTO) |
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860 /* |
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861 * Lookup the channel index from the socket. |
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862 * Returns -1 when the socket isn't found. |
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863 */ |
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864 int |
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865 channel_socket2idx(sock_T fd) |
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866 { |
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867 int i; |
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868 |
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869 if (fd >= 0) |
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870 for (i = 0; i < channel_count; ++i) |
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871 if (channels[i].ch_fd == fd) |
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872 return i; |
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873 return -1; |
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874 } |
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875 # endif |
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876 |
7770
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877 /* |
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878 * Write "buf" (NUL terminated string) to channel "idx". |
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879 * When "fun" is not NULL an error message might be given. |
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880 * Return FAIL or OK. |
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881 */ |
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882 int |
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883 channel_send(int idx, char_u *buf, char *fun) |
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884 { |
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885 channel_T *channel = &channels[idx]; |
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886 int len = (int)STRLEN(buf); |
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887 |
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|
888 if (channel->ch_fd < 0) |
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889 { |
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890 if (!channel->ch_error && fun != NULL) |
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891 { |
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892 CHERROR(" %s(): write while not connected\n", fun); |
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893 EMSG2("E630: %s(): write while not connected", fun); |
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894 } |
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895 channel->ch_error = TRUE; |
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896 return FAIL; |
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897 } |
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898 |
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899 if (sock_write(channel->ch_fd, buf, len) != len) |
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900 { |
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901 if (!channel->ch_error && fun != NULL) |
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902 { |
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903 CHERROR(" %s(): write failed\n", fun); |
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904 EMSG2("E631: %s(): write failed", fun); |
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905 } |
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906 channel->ch_error = TRUE; |
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907 return FAIL; |
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908 } |
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909 |
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910 channel->ch_error = FALSE; |
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911 return OK; |
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912 } |
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|
913 |
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914 # if (defined(UNIX) && !defined(HAVE_SELECT)) || defined(PROTO) |
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915 /* |
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916 * Add open channels to the poll struct. |
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917 * Return the adjusted struct index. |
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918 * The type of "fds" is hidden to avoid problems with the function proto. |
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919 */ |
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|
920 int |
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|
921 channel_poll_setup(int nfd_in, void *fds_in) |
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922 { |
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|
923 int nfd = nfd_in; |
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|
924 int i; |
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925 struct pollfd *fds = fds_in; |
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|
926 |
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|
927 for (i = 0; i < channel_count; ++i) |
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928 if (channels[i].ch_fd >= 0) |
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929 { |
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930 channels[i].ch_idx = nfd; |
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|
931 fds[nfd].fd = channels[i].ch_fd; |
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|
932 fds[nfd].events = POLLIN; |
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933 nfd++; |
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934 } |
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|
935 else |
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|
936 channels[i].ch_idx = -1; |
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|
937 |
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|
938 return nfd; |
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939 } |
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|
940 |
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|
941 /* |
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942 * The type of "fds" is hidden to avoid problems with the function proto. |
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943 */ |
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|
944 int |
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945 channel_poll_check(int ret_in, void *fds_in) |
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946 { |
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|
947 int ret = ret_in; |
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948 int i; |
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949 struct pollfd *fds = fds_in; |
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|
950 |
6069f43cea4e
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|
951 for (i = 0; i < channel_count; ++i) |
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952 if (ret > 0 && channels[i].ch_idx != -1 |
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953 && fds[channels[i].ch_idx].revents & POLLIN) |
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|
954 { |
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|
955 channel_read(i); |
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|
956 --ret; |
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957 } |
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|
958 |
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|
959 return ret; |
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960 } |
7770
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|
961 # endif /* UNIX && !HAVE_SELECT */ |
7743
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962 |
7770
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963 # if (defined(UNIX) && defined(HAVE_SELECT)) || defined(PROTO) |
7743
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964 /* |
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965 * The type of "rfds" is hidden to avoid problems with the function proto. |
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966 */ |
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967 int |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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968 channel_select_setup(int maxfd_in, void *rfds_in) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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969 { |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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970 int maxfd = maxfd_in; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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971 int i; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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972 fd_set *rfds = rfds_in; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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973 |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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974 for (i = 0; i < channel_count; ++i) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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975 if (channels[i].ch_fd >= 0) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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976 { |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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977 FD_SET(channels[i].ch_fd, rfds); |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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978 if (maxfd < channels[i].ch_fd) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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979 maxfd = channels[i].ch_fd; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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980 } |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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981 |
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982 return maxfd; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
Christian Brabandt <cb@256bit.org>
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983 } |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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984 |
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985 /* |
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986 * The type of "rfds" is hidden to avoid problems with the function proto. |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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987 */ |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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988 int |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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989 channel_select_check(int ret_in, void *rfds_in) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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990 { |
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991 int ret = ret_in; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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992 int i; |
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993 fd_set *rfds = rfds_in; |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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994 |
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995 for (i = 0; i < channel_count; ++i) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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996 if (ret > 0 && channels[i].ch_fd >= 0 |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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997 && FD_ISSET(channels[i].ch_fd, rfds)) |
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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a
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998 { |
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999 channel_read(i); |
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1000 --ret; |
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1001 } |
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1002 |
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1003 return ret; |
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1004 } |
7770
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1005 # endif /* UNIX && HAVE_SELECT */ |
7743
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1006 |
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1007 #endif /* FEAT_CHANNEL */ |