Mercurial > vim
annotate src/channel.c @ 7864:6b0891de44a9 v7.4.1229
commit https://github.com/vim/vim/commit/fb1f62691eae7c79a28b3b17a60e72ce198c71a2
Author: Bram Moolenaar <Bram@vim.org>
Date: Sun Jan 31 20:24:32 2016 +0100
patch 7.4.1229
Problem: "eval" and "expr" channel commands don't work yet.
Solution: Implement them. Update the error numbers. Also add "redraw".
author | Christian Brabandt <cb@256bit.org> |
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date | Sun, 31 Jan 2016 20:30:04 +0100 |
parents | 28f569c7dab9 |
children | 17e6ff1a74f1 |
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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 WIN32 |
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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 |
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103 int ch_json_mode; |
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104 } channel_T; |
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105 |
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106 /* |
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107 * Information about all channels. |
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108 * There can be gaps for closed channels, they will be reused later. |
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109 */ |
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110 static channel_T *channels = NULL; |
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111 static int channel_count = 0; |
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112 |
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113 /* |
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114 * TODO: open debug file when desired. |
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115 */ |
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116 FILE *debugfd = NULL; |
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117 |
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118 /* |
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119 * Add a new channel slot, return the index. |
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120 * The channel isn't actually used into ch_fd is set >= 0; |
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121 * Returns -1 if all channels are in use. |
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122 */ |
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123 static int |
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124 add_channel(void) |
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125 { |
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126 int idx; |
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127 channel_T *new_channels; |
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128 |
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129 if (channels != NULL) |
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130 for (idx = 0; idx < channel_count; ++idx) |
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131 if (channels[idx].ch_fd < 0) |
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132 /* re-use a closed channel slot */ |
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133 return idx; |
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134 if (channel_count == MAX_OPEN_CHANNELS) |
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135 return -1; |
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136 new_channels = (channel_T *)alloc(sizeof(channel_T) * (channel_count + 1)); |
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137 if (new_channels == NULL) |
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138 return -1; |
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139 if (channels != NULL) |
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140 mch_memmove(new_channels, channels, sizeof(channel_T) * channel_count); |
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141 channels = new_channels; |
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142 (void)vim_memset(&channels[channel_count], 0, sizeof(channel_T)); |
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143 |
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144 channels[channel_count].ch_fd = (sock_T)-1; |
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145 #ifdef FEAT_GUI_X11 |
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146 channels[channel_count].ch_inputHandler = (XtInputId)NULL; |
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147 #endif |
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148 #ifdef FEAT_GUI_GTK |
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149 channels[channel_count].ch_inputHandler = 0; |
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150 #endif |
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151 #ifdef FEAT_GUI_W32 |
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152 channels[channel_count].ch_inputHandler = -1; |
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153 #endif |
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154 |
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155 return channel_count++; |
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156 } |
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157 |
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158 #if defined(FEAT_GUI) || defined(PROTO) |
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159 /* |
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160 * Read a command from netbeans. |
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161 */ |
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162 #ifdef FEAT_GUI_X11 |
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163 static void |
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164 messageFromNetbeans(XtPointer clientData, |
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165 int *unused1 UNUSED, |
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166 XtInputId *unused2 UNUSED) |
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167 { |
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168 channel_read((int)(long)clientData); |
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169 } |
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170 #endif |
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171 |
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172 #ifdef FEAT_GUI_GTK |
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173 static void |
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174 messageFromNetbeans(gpointer clientData, |
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175 gint unused1 UNUSED, |
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176 GdkInputCondition unused2 UNUSED) |
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177 { |
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178 channel_read((int)(long)clientData); |
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179 } |
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180 #endif |
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181 |
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182 static void |
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183 channel_gui_register(int idx) |
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184 { |
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185 channel_T *channel = &channels[idx]; |
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186 |
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187 if (!CH_HAS_GUI) |
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188 return; |
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189 |
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190 # ifdef FEAT_GUI_X11 |
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191 /* tell notifier we are interested in being called |
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192 * when there is input on the editor connection socket |
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193 */ |
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194 if (channel->ch_inputHandler == (XtInputId)NULL) |
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195 channel->ch_inputHandler = |
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196 XtAppAddInput((XtAppContext)app_context, channel->ch_fd, |
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197 (XtPointer)(XtInputReadMask + XtInputExceptMask), |
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198 messageFromNetbeans, (XtPointer)(long)idx); |
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199 # else |
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200 # ifdef FEAT_GUI_GTK |
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201 /* |
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202 * Tell gdk we are interested in being called when there |
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203 * is input on the editor connection socket |
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204 */ |
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205 if (channel->ch_inputHandler == 0) |
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206 channel->ch_inputHandler = |
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207 gdk_input_add((gint)channel->ch_fd, (GdkInputCondition) |
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208 ((int)GDK_INPUT_READ + (int)GDK_INPUT_EXCEPTION), |
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209 messageFromNetbeans, (gpointer)(long)idx); |
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210 # else |
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211 # ifdef FEAT_GUI_W32 |
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212 /* |
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213 * Tell Windows we are interested in receiving message when there |
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214 * is input on the editor connection socket. |
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215 */ |
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216 if (channel->ch_inputHandler == -1) |
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217 channel->ch_inputHandler = |
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218 WSAAsyncSelect(channel->ch_fd, s_hwnd, WM_NETBEANS, FD_READ); |
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219 # endif |
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220 # endif |
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221 # endif |
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222 } |
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223 |
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224 /* |
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225 * Register any of our file descriptors with the GUI event handling system. |
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226 * Called when the GUI has started. |
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227 */ |
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228 void |
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229 channel_gui_register_all(void) |
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230 { |
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231 int i; |
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232 |
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233 for (i = 0; i < channel_count; ++i) |
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234 if (channels[i].ch_fd >= 0) |
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235 channel_gui_register(i); |
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236 } |
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237 |
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238 static void |
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239 channel_gui_unregister(int idx) |
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240 { |
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241 channel_T *channel = &channels[idx]; |
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242 |
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243 # ifdef FEAT_GUI_X11 |
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244 if (channel->ch_inputHandler != (XtInputId)NULL) |
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245 { |
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246 XtRemoveInput(channel->ch_inputHandler); |
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247 channel->ch_inputHandler = (XtInputId)NULL; |
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248 } |
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249 # else |
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250 # ifdef FEAT_GUI_GTK |
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251 if (channel->ch_inputHandler != 0) |
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252 { |
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253 gdk_input_remove(channel->ch_inputHandler); |
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254 channel->ch_inputHandler = 0; |
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255 } |
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256 # else |
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257 # ifdef FEAT_GUI_W32 |
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258 if (channel->ch_inputHandler == 0) |
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259 { |
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260 WSAAsyncSelect(channel->ch_fd, s_hwnd, 0, 0); |
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261 channel->ch_inputHandler = -1; |
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262 } |
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263 # endif |
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264 # endif |
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265 # endif |
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266 } |
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267 |
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268 #endif |
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269 |
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270 /* |
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271 * Open a channel to "hostname":"port". |
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272 * Returns the channel number for success. |
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273 * Returns a negative number for failure. |
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274 */ |
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275 int |
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276 channel_open(char *hostname, int port_in, void (*close_cb)(void)) |
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277 { |
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278 int sd; |
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279 struct sockaddr_in server; |
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280 struct hostent * host; |
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281 #ifdef WIN32 |
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282 u_short port = port_in; |
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283 #else |
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284 int port = port_in; |
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285 #endif |
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286 int idx; |
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287 |
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288 #ifdef WIN32 |
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289 channel_init_winsock(); |
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290 #endif |
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291 |
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292 idx = add_channel(); |
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293 if (idx < 0) |
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294 { |
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295 CHERROR("All channels are in use\n", ""); |
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296 EMSG(_("E897: All channels are in use")); |
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297 return -1; |
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298 } |
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299 |
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300 if ((sd = (sock_T)socket(AF_INET, SOCK_STREAM, 0)) == (sock_T)-1) |
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301 { |
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302 CHERROR("error in socket() in channel_open()\n", ""); |
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303 PERROR("E898: socket() in channel_open()"); |
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304 return -1; |
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305 } |
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306 |
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307 /* Get the server internet address and put into addr structure */ |
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308 /* fill in the socket address structure and connect to server */ |
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309 vim_memset((char *)&server, 0, sizeof(server)); |
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310 server.sin_family = AF_INET; |
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311 server.sin_port = htons(port); |
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312 if ((host = gethostbyname(hostname)) == NULL) |
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313 { |
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314 CHERROR("error in gethostbyname() in channel_open()\n", ""); |
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315 PERROR("E901: gethostbyname() in channel_open()"); |
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316 sock_close(sd); |
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317 return -1; |
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318 } |
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319 memcpy((char *)&server.sin_addr, host->h_addr, host->h_length); |
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320 |
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321 /* Connect to server */ |
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322 if (connect(sd, (struct sockaddr *)&server, sizeof(server))) |
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323 { |
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324 SOCK_ERRNO; |
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325 CHERROR("channel_open: Connect failed with errno %d\n", errno); |
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326 if (errno == ECONNREFUSED) |
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327 { |
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328 sock_close(sd); |
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329 if ((sd = (sock_T)socket(AF_INET, SOCK_STREAM, 0)) == (sock_T)-1) |
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330 { |
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331 SOCK_ERRNO; |
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332 CHERROR("socket() retry in channel_open()\n", ""); |
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333 PERROR("E900: socket() retry in channel_open()"); |
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334 return -1; |
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335 } |
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336 if (connect(sd, (struct sockaddr *)&server, sizeof(server))) |
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337 { |
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338 int retries = 36; |
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339 int success = FALSE; |
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340 |
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341 SOCK_ERRNO; |
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342 while (retries-- && ((errno == ECONNREFUSED) |
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343 || (errno == EINTR))) |
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344 { |
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345 CHERROR("retrying...\n", ""); |
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346 mch_delay(3000L, TRUE); |
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347 ui_breakcheck(); |
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348 if (got_int) |
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349 { |
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350 errno = EINTR; |
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351 break; |
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352 } |
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353 if (connect(sd, (struct sockaddr *)&server, |
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354 sizeof(server)) == 0) |
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355 { |
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356 success = TRUE; |
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357 break; |
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358 } |
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359 SOCK_ERRNO; |
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360 } |
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361 if (!success) |
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362 { |
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363 /* Get here when the server can't be found. */ |
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364 CHERROR("Cannot connect to port after retry\n", ""); |
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365 PERROR(_("E899: Cannot connect to port after retry2")); |
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366 sock_close(sd); |
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367 return -1; |
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368 } |
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369 } |
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370 } |
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371 else |
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372 { |
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373 CHERROR("Cannot connect to port\n", ""); |
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374 PERROR(_("E902: Cannot connect to port")); |
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375 sock_close(sd); |
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376 return -1; |
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377 } |
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378 } |
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379 |
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380 channels[idx].ch_fd = sd; |
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381 channels[idx].ch_close_cb = close_cb; |
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382 |
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383 #ifdef FEAT_GUI |
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384 channel_gui_register(idx); |
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385 #endif |
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386 |
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387 return idx; |
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388 } |
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389 |
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390 /* |
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391 * Set the json mode of channel "idx" to TRUE or FALSE. |
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392 */ |
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393 void |
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394 channel_set_json_mode(int idx, int json_mode) |
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395 { |
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396 channels[idx].ch_json_mode = json_mode; |
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397 } |
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398 |
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399 /* |
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400 * Set the callback for channel "idx". |
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401 */ |
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402 void |
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403 channel_set_callback(int idx, char_u *callback) |
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404 { |
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405 vim_free(channels[idx].ch_callback); |
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406 channels[idx].ch_callback = vim_strsave(callback); |
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407 } |
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408 |
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409 /* |
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410 * Set the callback for channel "idx" for the next response. |
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411 */ |
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412 void |
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413 channel_set_req_callback(int idx, char_u *callback) |
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414 { |
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415 vim_free(channels[idx].ch_req_callback); |
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416 channels[idx].ch_req_callback = callback == NULL |
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417 ? NULL : vim_strsave(callback); |
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418 } |
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419 |
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420 /* |
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421 * Decode JSON "msg", which must have the form "[expr1, expr2, expr3]". |
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422 * Put "expr1" in "tv1". |
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423 * Put "expr2" in "tv2". |
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424 * Put "expr3" in "tv3". If "tv3" is NULL there is no "expr3". |
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425 * |
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426 * Return OK or FAIL. |
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427 */ |
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428 int |
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429 channel_decode_json(char_u *msg, typval_T *tv1, typval_T *tv2, typval_T *tv3) |
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430 { |
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431 js_read_T reader; |
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432 typval_T listtv; |
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433 |
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434 reader.js_buf = msg; |
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435 reader.js_eof = TRUE; |
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436 reader.js_used = 0; |
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437 json_decode(&reader, &listtv); |
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438 |
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439 if (listtv.v_type == VAR_LIST) |
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440 { |
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441 list_T *list = listtv.vval.v_list; |
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442 |
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443 if (list->lv_len == 2 || (tv3 != NULL && list->lv_len == 3)) |
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444 { |
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445 /* Move the item from the list and then change the type to avoid the |
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446 * item being freed. */ |
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447 *tv1 = list->lv_first->li_tv; |
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448 list->lv_first->li_tv.v_type = VAR_NUMBER; |
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449 *tv2 = list->lv_first->li_next->li_tv; |
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450 list->lv_first->li_next->li_tv.v_type = VAR_NUMBER; |
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451 if (tv3 != NULL) |
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452 { |
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453 if (list->lv_len == 3) |
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454 { |
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455 *tv3 = list->lv_last->li_tv; |
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456 list->lv_last->li_tv.v_type = VAR_NUMBER; |
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457 } |
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458 else |
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459 tv3->v_type = VAR_UNKNOWN; |
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460 } |
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461 list_unref(list); |
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462 return OK; |
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463 } |
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464 } |
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465 |
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466 /* give error message? */ |
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467 clear_tv(&listtv); |
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468 return FAIL; |
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469 } |
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470 |
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471 /* |
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472 * Invoke the "callback" on channel "idx". |
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473 */ |
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474 static void |
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475 invoke_callback(int idx, char_u *callback, typval_T *argv) |
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476 { |
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477 typval_T rettv; |
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478 int dummy; |
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479 |
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480 argv[0].v_type = VAR_NUMBER; |
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481 argv[0].vval.v_number = idx; |
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482 |
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483 call_func(callback, (int)STRLEN(callback), |
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484 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL); |
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485 /* If an echo command was used the cursor needs to be put back where |
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486 * it belongs. */ |
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487 setcursor(); |
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488 cursor_on(); |
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489 out_flush(); |
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490 } |
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491 |
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492 /* |
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493 * Execute a command received over channel "idx". |
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494 * "cmd" is the command string, "arg2" the second argument. |
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495 * "arg3" is the third argument, NULL if missing. |
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496 */ |
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497 static void |
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498 channel_exe_cmd(int idx, char_u *cmd, typval_T *arg2, typval_T *arg3) |
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499 { |
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500 char_u *arg; |
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501 |
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502 if (arg2->v_type != VAR_STRING) |
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503 { |
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504 if (p_verbose > 2) |
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505 EMSG("E903: received ex command with non-string argument"); |
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506 return; |
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507 } |
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508 arg = arg2->vval.v_string; |
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509 |
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510 if (STRCMP(cmd, "ex") == 0) |
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511 { |
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512 do_cmdline_cmd(arg); |
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513 } |
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514 else if (STRCMP(cmd, "normal") == 0) |
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515 { |
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516 exarg_T ea; |
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517 |
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518 ea.arg = arg; |
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519 ea.addr_count = 0; |
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520 ea.forceit = TRUE; /* no mapping */ |
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521 ex_normal(&ea); |
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522 } |
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523 else if (STRCMP(cmd, "redraw") == 0) |
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524 { |
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525 exarg_T ea; |
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526 |
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527 ea.forceit = *arg != NUL; |
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528 ex_redraw(&ea); |
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529 showruler(FALSE); |
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530 setcursor(); |
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531 out_flush(); |
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532 #ifdef FEAT_GUI |
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533 if (gui.in_use) |
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534 { |
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535 gui_update_cursor(FALSE, FALSE); |
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536 gui_mch_flush(); |
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537 } |
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538 #endif |
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539 } |
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540 else if (STRCMP(cmd, "expr") == 0 || STRCMP(cmd, "eval") == 0) |
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541 { |
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542 int is_eval = cmd[1] == 'v'; |
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543 |
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544 if (is_eval && arg3->v_type != VAR_NUMBER) |
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545 { |
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546 if (p_verbose > 2) |
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547 EMSG("E904: third argument for eval must be a number"); |
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548 } |
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549 else |
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550 { |
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551 typval_T *tv = eval_expr(arg, NULL); |
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552 typval_T err_tv; |
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553 char_u *json; |
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554 |
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555 if (is_eval) |
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556 { |
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557 if (tv == NULL) |
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558 { |
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559 err_tv.v_type = VAR_STRING; |
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560 err_tv.vval.v_string = (char_u *)"ERROR"; |
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561 tv = &err_tv; |
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562 } |
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563 json = json_encode_nr_expr(arg3->vval.v_number, tv); |
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564 channel_send(idx, json, "eval"); |
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565 vim_free(json); |
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566 } |
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567 free_tv(tv); |
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568 } |
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569 } |
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570 else if (p_verbose > 2) |
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571 EMSG2("E905: received unknown command: %s", cmd); |
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572 } |
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573 |
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574 /* |
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575 * Invoke a callback for channel "idx" if needed. |
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576 */ |
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577 static void |
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578 may_invoke_callback(int idx) |
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579 { |
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580 char_u *msg; |
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581 typval_T typetv; |
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582 typval_T argv[3]; |
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583 typval_T arg3; |
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584 char_u *cmd = NULL; |
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585 int seq_nr = -1; |
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586 int ret = OK; |
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587 |
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588 if (channel_peek(idx) == NULL) |
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589 return; |
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590 |
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591 /* Concatenate everything into one buffer. |
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592 * TODO: only read what the callback will use. |
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593 * TODO: avoid multiple allocations. */ |
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594 while (channel_collapse(idx) == OK) |
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595 ; |
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596 msg = channel_get(idx); |
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597 |
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598 if (channels[idx].ch_json_mode) |
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599 { |
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600 ret = channel_decode_json(msg, &typetv, &argv[1], &arg3); |
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601 if (ret == OK) |
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602 { |
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603 /* TODO: error if arg3 is set when it shouldn't? */ |
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604 if (typetv.v_type == VAR_STRING) |
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605 cmd = typetv.vval.v_string; |
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606 else if (typetv.v_type == VAR_NUMBER) |
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607 seq_nr = typetv.vval.v_number; |
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608 } |
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609 } |
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610 else |
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611 { |
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612 argv[1].v_type = VAR_STRING; |
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613 argv[1].vval.v_string = msg; |
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614 } |
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615 |
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616 if (ret == OK) |
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617 { |
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618 if (cmd != NULL) |
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619 { |
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620 channel_exe_cmd(idx, cmd, &argv[1], &arg3); |
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621 } |
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622 else if (channels[idx].ch_req_callback != NULL && seq_nr != 0) |
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623 { |
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624 /* TODO: check the sequence number */ |
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625 /* invoke the one-time callback */ |
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626 invoke_callback(idx, channels[idx].ch_req_callback, argv); |
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627 channels[idx].ch_req_callback = NULL; |
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628 } |
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629 else if (channels[idx].ch_callback != NULL) |
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630 { |
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631 /* invoke the channel callback */ |
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632 invoke_callback(idx, channels[idx].ch_callback, argv); |
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633 } |
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634 /* else: drop the message */ |
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635 |
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636 if (channels[idx].ch_json_mode) |
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637 { |
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638 clear_tv(&typetv); |
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639 clear_tv(&argv[1]); |
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640 clear_tv(&arg3); |
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641 } |
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642 } |
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643 |
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644 vim_free(msg); |
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645 } |
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646 |
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647 /* |
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648 * Return TRUE when channel "idx" is open. |
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649 * Also returns FALSE or invalid "idx". |
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650 */ |
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651 int |
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652 channel_is_open(int idx) |
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653 { |
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654 return idx >= 0 && idx < channel_count && channels[idx].ch_fd >= 0; |
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655 } |
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656 |
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657 /* |
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658 * Close channel "idx". |
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659 * This does not trigger the close callback. |
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660 */ |
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661 void |
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662 channel_close(int idx) |
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663 { |
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664 channel_T *channel = &channels[idx]; |
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665 |
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666 if (channel->ch_fd >= 0) |
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667 { |
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668 sock_close(channel->ch_fd); |
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669 channel->ch_fd = -1; |
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670 #ifdef FEAT_GUI |
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671 channel_gui_unregister(idx); |
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672 #endif |
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673 vim_free(channel->ch_callback); |
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674 channel->ch_callback = NULL; |
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675 } |
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676 } |
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677 |
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678 /* |
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679 * Store "buf[len]" on channel "idx". |
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680 * Returns OK or FAIL. |
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681 */ |
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682 int |
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683 channel_save(int idx, char_u *buf, int len) |
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684 { |
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685 queue_T *node; |
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686 queue_T *head = &channels[idx].ch_head; |
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687 |
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688 node = (queue_T *)alloc(sizeof(queue_T)); |
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689 if (node == NULL) |
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690 return FAIL; /* out of memory */ |
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691 node->buffer = alloc(len + 1); |
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692 if (node->buffer == NULL) |
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693 { |
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694 vim_free(node); |
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695 return FAIL; /* out of memory */ |
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696 } |
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697 mch_memmove(node->buffer, buf, (size_t)len); |
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698 node->buffer[len] = NUL; |
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699 |
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700 if (head->next == NULL) /* initialize circular queue */ |
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701 { |
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|
702 head->next = head; |
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|
703 head->prev = head; |
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704 } |
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|
705 |
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|
706 /* insert node at tail of queue */ |
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707 node->next = head; |
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|
708 node->prev = head->prev; |
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|
709 head->prev->next = node; |
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|
710 head->prev = node; |
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|
711 |
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|
712 if (debugfd != NULL) |
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|
713 { |
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|
714 fprintf(debugfd, "RECV on %d: ", idx); |
7795
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diff
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|
715 if (fwrite(buf, len, 1, debugfd) != 1) |
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|
716 return FAIL; |
7770
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717 fprintf(debugfd, "\n"); |
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718 } |
7795
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719 return OK; |
7770
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|
720 } |
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|
721 |
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|
722 /* |
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723 * Return the first buffer from the channel without removing it. |
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|
724 * Returns NULL if there is nothing. |
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|
725 */ |
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|
726 char_u * |
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|
727 channel_peek(int idx) |
42c1a4e63d12
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|
728 { |
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|
729 queue_T *head = &channels[idx].ch_head; |
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|
730 |
42c1a4e63d12
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|
731 if (head->next == head || head->next == NULL) |
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732 return NULL; |
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|
733 return head->next->buffer; |
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|
734 } |
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commit https://github.com/vim/vim/commit/d04a020a8a8d7a438b091d49218c438880beb50c
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|
735 |
42c1a4e63d12
commit https://github.com/vim/vim/commit/d04a020a8a8d7a438b091d49218c438880beb50c
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|
736 /* |
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|
737 * Return the first buffer from the channel and remove it. |
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738 * The caller must free it. |
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739 * Returns NULL if there is nothing. |
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|
740 */ |
42c1a4e63d12
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|
741 char_u * |
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|
742 channel_get(int idx) |
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743 { |
42c1a4e63d12
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744 queue_T *head = &channels[idx].ch_head; |
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745 queue_T *node; |
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|
746 char_u *p; |
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|
747 |
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|
748 if (head->next == head || head->next == NULL) |
42c1a4e63d12
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749 return NULL; |
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|
750 node = head->next; |
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|
751 /* dispose of the node but keep the buffer */ |
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|
752 p = node->buffer; |
42c1a4e63d12
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|
753 head->next = node->next; |
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|
754 node->next->prev = node->prev; |
42c1a4e63d12
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|
755 vim_free(node); |
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|
756 return p; |
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|
757 } |
42c1a4e63d12
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|
758 |
42c1a4e63d12
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|
759 /* |
42c1a4e63d12
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|
760 * Collapses the first and second buffer in the channel "idx". |
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|
761 * Returns FAIL if that is not possible. |
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762 */ |
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|
763 int |
42c1a4e63d12
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|
764 channel_collapse(int idx) |
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|
765 { |
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|
766 queue_T *head = &channels[idx].ch_head; |
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767 queue_T *node = head->next; |
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768 char_u *p; |
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|
769 |
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|
770 if (node == head || node == NULL || node->next == head) |
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771 return FAIL; |
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|
772 |
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773 p = alloc((unsigned)(STRLEN(node->buffer) |
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774 + STRLEN(node->next->buffer) + 1)); |
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|
775 if (p == NULL) |
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776 return FAIL; /* out of memory */ |
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|
777 STRCPY(p, node->buffer); |
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|
778 STRCAT(p, node->next->buffer); |
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|
779 vim_free(node->next->buffer); |
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780 node->next->buffer = p; |
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|
781 |
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changeset
|
782 /* dispose of the node and buffer */ |
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783 head->next = node->next; |
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784 node->next->prev = node->prev; |
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785 vim_free(node->buffer); |
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786 vim_free(node); |
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787 return OK; |
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788 } |
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789 |
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790 /* |
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791 * Clear the read buffer on channel "idx". |
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792 */ |
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793 void |
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|
794 channel_clear(int idx) |
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795 { |
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796 queue_T *head = &channels[idx].ch_head; |
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797 queue_T *node = head->next; |
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|
798 queue_T *next; |
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799 |
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800 while (node != NULL && node != head) |
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801 { |
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802 next = node->next; |
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803 vim_free(node->buffer); |
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804 vim_free(node); |
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805 if (next == head) |
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806 { |
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807 head->next = head; |
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808 head->prev = head; |
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809 break; |
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810 } |
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811 node = next; |
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812 } |
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813 } |
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814 |
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815 /* Sent when the channel is found closed when reading. */ |
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816 #define DETACH_MSG "\"DETACH\"\n" |
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817 |
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818 /* Buffer size for reading incoming messages. */ |
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819 #define MAXMSGSIZE 4096 |
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820 |
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821 /* |
7788
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822 * Check for reading from "fd" with "timeout" msec. |
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823 * Return FAIL when there is nothing to read. |
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824 */ |
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825 static int |
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826 channel_wait(int fd, int timeout) |
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827 { |
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828 #ifdef HAVE_SELECT |
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829 struct timeval tval; |
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830 fd_set rfds; |
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831 int ret; |
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832 |
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833 FD_ZERO(&rfds); |
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834 FD_SET(fd, &rfds); |
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835 tval.tv_sec = timeout / 1000; |
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836 tval.tv_usec = (timeout % 1000) * 1000; |
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837 for (;;) |
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838 { |
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839 ret = select(fd + 1, &rfds, NULL, NULL, &tval); |
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840 # ifdef EINTR |
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841 if (ret == -1 && errno == EINTR) |
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842 continue; |
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843 # endif |
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844 if (ret <= 0) |
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845 return FAIL; |
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846 break; |
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847 } |
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848 #else |
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849 # ifdef HAVE_POLL |
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850 struct pollfd fds; |
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851 |
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852 fds.fd = fd; |
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853 fds.events = POLLIN; |
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854 if (poll(&fds, 1, timeout) <= 0) |
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855 return FAIL; |
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856 # endif |
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857 #endif |
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858 return OK; |
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859 } |
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860 |
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861 /* |
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862 * Return a unique ID to be used in a message. |
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863 */ |
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864 int |
7817
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865 channel_get_id(void) |
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866 { |
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867 static int next_id = 1; |
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868 |
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869 return next_id++; |
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870 } |
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871 |
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872 /* |
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873 * Read from channel "idx" for as long as there is something to read. |
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874 * The data is put in the read queue. |
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875 */ |
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876 void |
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877 channel_read(int idx) |
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878 { |
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879 static char_u *buf = NULL; |
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880 int len = 0; |
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881 int readlen = 0; |
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882 channel_T *channel = &channels[idx]; |
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883 |
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884 if (channel->ch_fd < 0) |
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885 { |
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886 CHLOG(idx, FALSE, "channel_read() called while socket is closed\n"); |
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887 return; |
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888 } |
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889 |
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890 /* Allocate a buffer to read into. */ |
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891 if (buf == NULL) |
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892 { |
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893 buf = alloc(MAXMSGSIZE); |
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894 if (buf == NULL) |
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895 return; /* out of memory! */ |
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896 } |
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897 |
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898 /* Keep on reading for as long as there is something to read. |
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899 * Use select() or poll() to avoid blocking on a message that is exactly |
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900 * MAXMSGSIZE long. */ |
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901 for (;;) |
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902 { |
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903 if (channel_wait(channel->ch_fd, 0) == FAIL) |
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904 break; |
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905 len = sock_read(channel->ch_fd, buf, MAXMSGSIZE); |
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906 if (len <= 0) |
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907 break; /* error or nothing more to read */ |
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908 |
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909 /* Store the read message in the queue. */ |
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910 channel_save(idx, buf, len); |
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911 readlen += len; |
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912 if (len < MAXMSGSIZE) |
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913 break; /* did read everything that's available */ |
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914 } |
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915 |
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916 /* Reading a socket disconnection (readlen == 0), or a socket error. */ |
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917 if (readlen <= 0) |
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918 { |
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919 /* Queue a "DETACH" netbeans message in the command queue in order to |
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920 * terminate the netbeans session later. Do not end the session here |
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921 * directly as we may be running in the context of a call to |
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922 * netbeans_parse_messages(): |
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923 * netbeans_parse_messages |
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924 * -> autocmd triggered while processing the netbeans cmd |
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925 * -> ui_breakcheck |
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926 * -> gui event loop or select loop |
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927 * -> channel_read() |
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928 */ |
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929 channel_save(idx, (char_u *)DETACH_MSG, (int)STRLEN(DETACH_MSG)); |
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930 |
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931 channel_close(idx); |
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932 if (channel->ch_close_cb != NULL) |
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933 (*channel->ch_close_cb)(); |
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934 |
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935 if (len < 0) |
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936 { |
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937 /* Todo: which channel? */ |
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938 CHERROR("%s(): cannot from channel\n", "channel_read"); |
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939 PERROR(_("E896: read from channel")); |
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940 } |
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941 } |
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942 |
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943 #if defined(CH_HAS_GUI) && defined(FEAT_GUI_GTK) |
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944 if (CH_HAS_GUI && gtk_main_level() > 0) |
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945 gtk_main_quit(); |
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946 #endif |
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947 } |
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948 |
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949 /* |
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950 * Read from channel "idx". Blocks until there is something to read or the |
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951 * timeout expires. |
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952 * Returns what was read in allocated memory. |
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953 * Returns NULL in case of error or timeout. |
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954 */ |
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955 char_u * |
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956 channel_read_block(int idx) |
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957 { |
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958 if (channel_peek(idx) == NULL) |
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959 { |
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960 /* Wait for up to 2 seconds. |
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961 * TODO: use timeout set on the channel. */ |
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962 if (channel_wait(channels[idx].ch_fd, 2000) == FAIL) |
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963 return NULL; |
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964 channel_read(idx); |
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965 } |
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966 |
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967 /* Concatenate everything into one buffer. |
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968 * TODO: avoid multiple allocations. */ |
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969 while (channel_collapse(idx) == OK) |
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970 ; |
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971 |
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972 return channel_get(idx); |
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973 } |
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974 |
7797
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975 # if defined(WIN32) || defined(PROTO) |
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976 /* |
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977 * Lookup the channel index from the socket. |
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978 * Returns -1 when the socket isn't found. |
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979 */ |
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980 int |
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981 channel_socket2idx(sock_T fd) |
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982 { |
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983 int i; |
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984 |
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985 if (fd >= 0) |
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986 for (i = 0; i < channel_count; ++i) |
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987 if (channels[i].ch_fd == fd) |
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988 return i; |
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989 return -1; |
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990 } |
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991 # endif |
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992 |
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993 /* |
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994 * Write "buf" (NUL terminated string) to channel "idx". |
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995 * When "fun" is not NULL an error message might be given. |
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996 * Return FAIL or OK. |
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997 */ |
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998 int |
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999 channel_send(int idx, char_u *buf, char *fun) |
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1000 { |
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1001 channel_T *channel = &channels[idx]; |
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1002 int len = (int)STRLEN(buf); |
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1003 |
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1004 if (channel->ch_fd < 0) |
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1005 { |
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1006 if (!channel->ch_error && fun != NULL) |
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1007 { |
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1008 CHERROR(" %s(): write while not connected\n", fun); |
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1009 EMSG2("E630: %s(): write while not connected", fun); |
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1010 } |
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1011 channel->ch_error = TRUE; |
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1012 return FAIL; |
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1013 } |
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1014 |
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1015 if (sock_write(channel->ch_fd, buf, len) != len) |
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1016 { |
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1017 if (!channel->ch_error && fun != NULL) |
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1018 { |
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1019 CHERROR(" %s(): write failed\n", fun); |
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1020 EMSG2("E631: %s(): write failed", fun); |
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1021 } |
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1022 channel->ch_error = TRUE; |
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1023 return FAIL; |
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1024 } |
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1025 |
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1026 channel->ch_error = FALSE; |
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1027 return OK; |
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1028 } |
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1029 |
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1030 # if (defined(UNIX) && !defined(HAVE_SELECT)) || defined(PROTO) |
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1031 /* |
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1032 * Add open channels to the poll struct. |
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1033 * Return the adjusted struct index. |
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1034 * The type of "fds" is hidden to avoid problems with the function proto. |
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1035 */ |
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1036 int |
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1037 channel_poll_setup(int nfd_in, void *fds_in) |
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1038 { |
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1039 int nfd = nfd_in; |
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1040 int i; |
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1041 struct pollfd *fds = fds_in; |
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1042 |
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1043 for (i = 0; i < channel_count; ++i) |
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1044 if (channels[i].ch_fd >= 0) |
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1045 { |
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1046 channels[i].ch_idx = nfd; |
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1047 fds[nfd].fd = channels[i].ch_fd; |
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1048 fds[nfd].events = POLLIN; |
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1049 nfd++; |
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1050 } |
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1051 else |
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1052 channels[i].ch_idx = -1; |
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1053 |
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1054 return nfd; |
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1055 } |
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1056 |
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1057 /* |
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1058 * The type of "fds" is hidden to avoid problems with the function proto. |
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1059 */ |
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1060 int |
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1061 channel_poll_check(int ret_in, void *fds_in) |
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1062 { |
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1063 int ret = ret_in; |
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1064 int i; |
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1065 struct pollfd *fds = fds_in; |
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1066 |
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1067 for (i = 0; i < channel_count; ++i) |
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1068 if (ret > 0 && channels[i].ch_idx != -1 |
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1069 && fds[channels[i].ch_idx].revents & POLLIN) |
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1070 { |
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1071 channel_read(i); |
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1072 --ret; |
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1073 } |
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1074 |
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1075 return ret; |
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1076 } |
7770
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1077 # endif /* UNIX && !HAVE_SELECT */ |
7743
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1078 |
7797
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1079 # if (!defined(FEAT_GUI_W32) && defined(HAVE_SELECT)) || defined(PROTO) |
7743
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1080 /* |
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1081 * The type of "rfds" is hidden to avoid problems with the function proto. |
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1082 */ |
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1083 int |
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1084 channel_select_setup(int maxfd_in, void *rfds_in) |
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1085 { |
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1086 int maxfd = maxfd_in; |
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1087 int i; |
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1088 fd_set *rfds = rfds_in; |
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1089 |
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1090 for (i = 0; i < channel_count; ++i) |
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1091 if (channels[i].ch_fd >= 0) |
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1092 { |
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1093 FD_SET(channels[i].ch_fd, rfds); |
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1094 if (maxfd < channels[i].ch_fd) |
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1095 maxfd = channels[i].ch_fd; |
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1096 } |
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1097 |
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1098 return maxfd; |
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1099 } |
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1100 |
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1101 /* |
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1102 * The type of "rfds" is hidden to avoid problems with the function proto. |
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1103 */ |
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1104 int |
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1105 channel_select_check(int ret_in, void *rfds_in) |
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1106 { |
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1107 int ret = ret_in; |
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1108 int i; |
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1109 fd_set *rfds = rfds_in; |
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1110 |
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1111 for (i = 0; i < channel_count; ++i) |
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1112 if (ret > 0 && channels[i].ch_fd >= 0 |
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1113 && FD_ISSET(channels[i].ch_fd, rfds)) |
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1114 { |
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1115 channel_read(i); |
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1116 --ret; |
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1117 } |
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1118 |
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1119 return ret; |
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1120 } |
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1121 # endif /* !FEAT_GUI_W32 && HAVE_SELECT */ |
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1122 |
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1123 /* |
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1124 * Invoked from the main loop when it's save to execute received commands. |
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1125 */ |
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1126 void |
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1127 channel_parse_messages(void) |
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1128 { |
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1129 int i; |
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1130 |
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1131 for (i = 0; i < channel_count; ++i) |
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1132 may_invoke_callback(i); |
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1133 } |
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1134 |
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1135 #endif /* FEAT_CHANNEL */ |