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1 *if_cscop.txt* For Vim version 7.4. Last change: 2011 Jun 12
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4 VIM REFERENCE MANUAL by Andy Kahn
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6 *cscope* *Cscope*
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7 This document explains how to use Vim's cscope interface.
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8
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9 Cscope is a tool like ctags, but think of it as ctags on steroids since it
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10 does a lot more than what ctags provides. In Vim, jumping to a result from
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11 a cscope query is just like jumping to any tag; it is saved on the tag stack
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12 so that with the right keyboard mappings, you can jump back and forth between
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13 functions as you normally would with |tags|.
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14
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15 1. Cscope introduction |cscope-intro|
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16 2. Cscope related commands |cscope-commands|
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17 3. Cscope options |cscope-options|
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18 4. How to use cscope in Vim |cscope-howtouse|
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19 5. Limitations |cscope-limitations|
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20 6. Suggested usage |cscope-suggestions|
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21 7. Availability & Information |cscope-info|
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22
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23 This is currently for Unix and Win32 only.
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24 {Vi does not have any of these commands}
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25
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26 ==============================================================================
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27 1. Cscope introduction *cscope-intro*
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28
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29 The following text is taken from a version of the cscope man page:
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30
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31 -----
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32
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33 Cscope is an interactive screen-oriented tool that helps you:
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34
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35 Learn how a C program works without endless flipping through a thick
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36 listing.
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37
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38 Locate the section of code to change to fix a bug without having to
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39 learn the entire program.
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40
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41 Examine the effect of a proposed change such as adding a value to an
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42 enum variable.
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43
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44 Verify that a change has been made in all source files such as adding
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45 an argument to an existing function.
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46
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47 Rename a global variable in all source files.
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48
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49 Change a constant to a preprocessor symbol in selected lines of files.
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50
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51 It is designed to answer questions like:
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52 Where is this symbol used?
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53 Where is it defined?
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54 Where did this variable get its value?
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55 What is this global symbol's definition?
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56 Where is this function in the source files?
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57 What functions call this function?
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58 What functions are called by this function?
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59 Where does the message "out of space" come from?
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60 Where is this source file in the directory structure?
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61 What files include this header file?
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62
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63 Cscope answers these questions from a symbol database that it builds the
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64 first time it is used on the source files. On a subsequent call, cscope
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65 rebuilds the database only if a source file has changed or the list of
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66 source files is different. When the database is rebuilt the data for the
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67 unchanged files is copied from the old database, which makes rebuilding
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68 much faster than the initial build.
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69
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70 -----
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71
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72 When cscope is normally invoked, you will get a full-screen selection
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73 screen allowing you to make a query for one of the above questions.
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74 However, once a match is found to your query and you have entered your
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75 text editor to edit the source file containing match, you cannot simply
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76 jump from tag to tag as you normally would with vi's Ctrl-] or :tag
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77 command.
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78
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79 Vim's cscope interface is done by invoking cscope with its line-oriented
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80 interface, and then parsing the output returned from a query. The end
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81 result is that cscope query results become just like regular tags, so
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82 you can jump to them just like you do with normal tags (Ctrl-] or :tag)
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83 and then go back by popping off the tagstack with Ctrl-T. (Please note
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84 however, that you don't actually jump to a cscope tag simply by doing
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85 Ctrl-] or :tag without remapping these commands or setting an option.
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86 See the remaining sections on how the cscope interface works and for
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87 suggested use.)
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88
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89
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90 ==============================================================================
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91 2. Cscope related commands *cscope-commands*
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92
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93 *:cscope* *:cs* *:scs* *:scscope* *E259* *E262* *E561* *E560*
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94 All cscope commands are accessed through suboptions to the main cscope
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95 command ":cscope". The shortest abbreviation is ":cs". The ":scscope"
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96 command does the same and also splits the window (short: "scs").
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97
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98 The available subcommands are:
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99
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100 *E563* *E564* *E566* *E568* *E569* *E622* *E623*
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101 *E625* *E626* *E609*
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102 add : Add a new cscope database/connection.
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103
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104 USAGE :cs add {file|dir} [pre-path] [flags]
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105
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106 [pre-path] is the pathname used with the -P command to cscope.
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107
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108 [flags] are any additional flags you want to pass to cscope.
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109
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110 EXAMPLES >
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111 :cscope add /usr/local/cdb/cscope.out
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112 :cscope add /projects/vim/cscope.out /usr/local/vim
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113 :cscope add cscope.out /usr/local/vim -C
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114 <
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2596
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115 *cscope-find* *cs-find* *E567*
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116 find : Query cscope. All cscope query options are available
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117 except option #5 ("Change this grep pattern").
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118
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119 USAGE :cs find {querytype} {name}
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120
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121 {querytype} corresponds to the actual cscope line
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122 interface numbers as well as default nvi commands:
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123
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124 0 or s: Find this C symbol
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125 1 or g: Find this definition
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126 2 or d: Find functions called by this function
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127 3 or c: Find functions calling this function
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128 4 or t: Find this text string
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129 6 or e: Find this egrep pattern
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130 7 or f: Find this file
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131 8 or i: Find files #including this file
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132
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1847
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133 For all types, except 4 and 6, leading white space for {name} is
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134 removed. For 4 and 6 there is exactly one space between {querytype}
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135 and {name}. Further white space is included in {name}.
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136
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137 EXAMPLES >
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138 :cscope find c vim_free
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139 :cscope find 3 vim_free
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140 <
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141 These two examples perform the same query: functions calling
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142 "vim_free". >
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143
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144 :cscope find t initOnce
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145 :cscope find t initOnce
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146 <
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147 The first one searches for the text "initOnce", the second one for
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148 " initOnce". >
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149
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150 :cscope find 0 DEFAULT_TERM
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151 <
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152 Executing this example on the source code for Vim 5.1 produces the
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153 following output:
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154
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155 Cscope tag: DEFAULT_TERM
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156 # line filename / context / line
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157 1 1009 vim-5.1-gtk/src/term.c <<GLOBAL>>
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158 #define DEFAULT_TERM (char_u *)"amiga"
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159 2 1013 vim-5.1-gtk/src/term.c <<GLOBAL>>
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160 #define DEFAULT_TERM (char_u *)"win32"
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161 3 1017 vim-5.1-gtk/src/term.c <<GLOBAL>>
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162 #define DEFAULT_TERM (char_u *)"pcterm"
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163 4 1021 vim-5.1-gtk/src/term.c <<GLOBAL>>
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164 #define DEFAULT_TERM (char_u *)"ansi"
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165 5 1025 vim-5.1-gtk/src/term.c <<GLOBAL>>
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166 #define DEFAULT_TERM (char_u *)"vt52"
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167 6 1029 vim-5.1-gtk/src/term.c <<GLOBAL>>
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168 #define DEFAULT_TERM (char_u *)"os2ansi"
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169 7 1033 vim-5.1-gtk/src/term.c <<GLOBAL>>
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170 #define DEFAULT_TERM (char_u *)"ansi"
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171 8 1037 vim-5.1-gtk/src/term.c <<GLOBAL>>
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172 # undef DEFAULT_TERM
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173 9 1038 vim-5.1-gtk/src/term.c <<GLOBAL>>
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174 #define DEFAULT_TERM (char_u *)"beos-ansi"
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175 10 1042 vim-5.1-gtk/src/term.c <<GLOBAL>>
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176 #define DEFAULT_TERM (char_u *)"mac-ansi"
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177 11 1335 vim-5.1-gtk/src/term.c <<set_termname>>
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178 term = DEFAULT_TERM;
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179 12 1459 vim-5.1-gtk/src/term.c <<set_termname>>
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180 if (STRCMP(term, DEFAULT_TERM))
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181 13 1826 vim-5.1-gtk/src/term.c <<termcapinit>>
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182 term = DEFAULT_TERM;
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183 14 1833 vim-5.1-gtk/src/term.c <<termcapinit>>
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184 term = DEFAULT_TERM;
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185 15 3635 vim-5.1-gtk/src/term.c <<update_tcap>>
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186 p = find_builtin_term(DEFAULT_TERM);
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187 Enter nr of choice (<CR> to abort):
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188
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189 The output shows several pieces of information:
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190 1. The tag number (there are 15 in this example).
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191 2. The line number where the tag occurs.
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192 3. The filename where the tag occurs.
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193 4. The context of the tag (e.g., global, or the function name).
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194 5. The line from the file itself.
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195
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196 help : Show a brief synopsis.
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197
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198 USAGE :cs help
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199
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2596
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200 *E261*
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201 kill : Kill a cscope connection (or kill all cscope connections).
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202
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203 USAGE :cs kill {num|partial_name}
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204
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205 To kill a cscope connection, the connection number or a partial
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206 name must be specified. The partial name is simply any part of
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207 the pathname of the cscope database. Kill a cscope connection
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208 using the partial name with caution!
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209
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210 If the specified connection number is -1, then _ALL_ cscope
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211 connections will be killed.
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212
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213 reset : Reinit all cscope connections.
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214
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215 USAGE :cs reset
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216
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217 show : Show cscope connections.
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218
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219 USAGE :cs show
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220
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221 *:lcscope* *:lcs*
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222 This command is same as the ":cscope" command, except when the
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223 'cscopequickfix' option is set, the location list for the current window is
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224 used instead of the quickfix list to show the cscope results.
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225
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226 *:cstag* *E257* *E562*
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227 If you use cscope as well as ctags, |:cstag| allows you to search one or
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228 the other before making a jump. For example, you can choose to first
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229 search your cscope database(s) for a match, and if one is not found, then
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230 your tags file(s) will be searched. The order in which this happens
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231 is determined by the value of |csto|. See |cscope-options| for more
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232 details.
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233
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234 |:cstag| performs the equivalent of ":cs find g" on the identifier when
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235 searching through the cscope database(s).
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236
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237 |:cstag| performs the equivalent of |:tjump| on the identifier when searching
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238 through your tags file(s).
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239
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240
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241 ==============================================================================
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242 3. Cscope options *cscope-options*
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243
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244 Use the |:set| command to set all cscope options. Ideally, you would do
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245 this in one of your startup files (e.g., .vimrc). Some cscope related
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246 variables are only valid within |.vimrc|. Setting them after vim has
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247 started will have no effect!
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248
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249 *cscopeprg* *csprg*
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250 'cscopeprg' specifies the command to execute cscope. The default is
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251 "cscope". For example: >
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252 :set csprg=/usr/local/bin/cscope
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253 <
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254 *cscopequickfix* *csqf* *E469*
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255 {not available when compiled without the |+quickfix| feature}
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256 'cscopequickfix' specifies whether to use quickfix window to show cscope
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236
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257 results. This is a list of comma-separated values. Each item consists of
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258 |cscope-find| command (s, g, d, c, t, e, f or i) and flag (+, - or 0).
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259 '+' indicates that results must be appended to quickfix window,
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260 '-' implies previous results clearance, '0' or command absence - don't use
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236
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261 quickfix. Search is performed from start until first command occurrence.
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262 The default value is "" (don't use quickfix anyway). The following value
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263 seems to be useful: >
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264 :set cscopequickfix=s-,c-,d-,i-,t-,e-
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265 <
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266 *cscopetag* *cst*
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2908
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267 If 'cscopetag' is set, the commands ":tag" and CTRL-] as well as "vim -t"
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268 will always use |:cstag| instead of the default :tag behavior. Effectively,
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269 by setting 'cst', you will always search your cscope databases as well as
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270 your tag files. The default is off. Examples: >
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271 :set cst
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272 :set nocst
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273 <
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2873
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274 *cscoperelative* *csre*
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2908
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275 If 'cscoperelative' is set, then in absence of a prefix given to cscope
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276 (prefix is the argument of -P option of cscope), basename of cscope.out
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277 location (usually the project root directory) will be used as the prefix
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278 to construct an absolute path. The default is off. Note: This option is
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279 only effective when cscope (cscopeprg) is initialized without a prefix
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280 path (-P). Examples: >
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2873
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281 :set csre
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282 :set nocsre
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283 <
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284 *cscopetagorder* *csto*
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285 The value of 'csto' determines the order in which |:cstag| performs a search.
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286 If 'csto' is set to zero, cscope database(s) are searched first, followed
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287 by tag file(s) if cscope did not return any matches. If 'csto' is set to
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288 one, tag file(s) are searched before cscope database(s). The default is zero.
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289 Examples: >
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290 :set csto=0
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291 :set csto=1
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292 <
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293 *cscopeverbose* *csverb*
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294 If 'cscopeverbose' is not set (the default), messages will not be printed
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295 indicating success or failure when adding a cscope database. Ideally, you
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296 should reset this option in your |.vimrc| before adding any cscope databases,
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297 and after adding them, set it. From then on, when you add more databases
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298 within Vim, you will get a (hopefully) useful message should the database fail
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299 to be added. Examples: >
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300 :set csverb
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301 :set nocsverb
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302 <
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303 *cscopepathcomp* *cspc*
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304 The value of 'cspc' determines how many components of a file's path to
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305 display. With the default value of zero the entire path will be displayed.
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306 The value one will display only the filename with no path. Other values
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307 display that many components. For example: >
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308 :set cspc=3
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309 will display the last 3 components of the file's path, including the file
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310 name itself.
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311
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312 ==============================================================================
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313 4. How to use cscope in Vim *cscope-howtouse*
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314
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315 The first thing you need to do is to build a cscope database for your
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316 source files. For the most basic case, simply do "cscope -b". Please
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317 refer to the cscope man page for more details.
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318
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319 Assuming you have a cscope database, you need to "add" the database to Vim.
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320 This establishes a cscope "connection" and makes it available for Vim to use.
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321 You can do this in your .vimrc file, or you can do it manually after starting
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322 vim. For example, to add the cscope database "cscope.out", you would do:
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323
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324 :cs add cscope.out
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325
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326 You can double-check the result of this by executing ":cs show". This will
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327 produce output which looks like this:
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328
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329 # pid database name prepend path
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330 0 28806 cscope.out <none>
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331
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332 Note:
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333 Because of the Microsoft RTL limitations, Win32 version shows 0 instead
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334 of the real pid.
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335
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336 Once a cscope connection is established, you can make queries to cscope and
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337 the results will be printed to you. Queries are made using the command
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338 ":cs find". For example:
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339
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340 :cs find g ALIGN_SIZE
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341
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342 This can get a little cumbersome since one ends up doing a significant
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343 amount of typing. Fortunately, there are ways around this by mapping
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344 shortcut keys. See |cscope-suggestions| for suggested usage.
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345
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346 If the results return only one match, you will automatically be taken to it.
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347 If there is more than one match, you will be given a selection screen to pick
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348 the match you want to go to. After you have jumped to the new location,
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349 simply hit Ctrl-T to get back to the previous one.
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350
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351
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352 ==============================================================================
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353 5. Limitations *cscope-limitations*
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354
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355 Cscope support for Vim is only available on systems that support these four
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356 system calls: fork(), pipe(), execl(), waitpid(). This means it is mostly
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357 limited to Unix systems.
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358
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359 Additionally Cscope support works for Win32. For more information and a
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360 cscope version for Win32 see:
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361
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362 http://iamphet.nm.ru/cscope/index.html
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363
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20
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364 The DJGPP-built version from http://cscope.sourceforge.net is known to not
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365 work with Vim.
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366
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1931
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367 Hard-coded limitation: doing a |:tjump| when |:cstag| searches the tag files
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368 is not configurable (e.g., you can't do a tselect instead).
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7
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369
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370 ==============================================================================
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371 6. Suggested usage *cscope-suggestions*
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372
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373 Put these entries in your .vimrc (adjust the pathname accordingly to your
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374 setup): >
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375
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376 if has("cscope")
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377 set csprg=/usr/local/bin/cscope
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378 set csto=0
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379 set cst
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380 set nocsverb
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381 " add any database in current directory
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382 if filereadable("cscope.out")
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383 cs add cscope.out
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384 " else add database pointed to by environment
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385 elseif $CSCOPE_DB != ""
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386 cs add $CSCOPE_DB
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387 endif
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388 set csverb
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389 endif
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390
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391 By setting 'cscopetag', we have effectively replaced all instances of the :tag
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392 command with :cstag. This includes :tag, Ctrl-], and "vim -t". In doing
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393 this, the regular tag command not only searches your ctags generated tag
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394 files, but your cscope databases as well.
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395
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396 Some users may want to keep the regular tag behavior and have a different
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397 shortcut to access :cstag. For example, one could map Ctrl-_ (underscore)
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398 to :cstag with the following command: >
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399
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400 map <C-_> :cstag <C-R>=expand("<cword>")<CR><CR>
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401
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402 A couple of very commonly used cscope queries (using ":cs find") is to
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403 find all functions calling a certain function and to find all occurrences
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404 of a particular C symbol. To do this, you can use these mappings as an
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405 example: >
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406
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407 map g<C-]> :cs find 3 <C-R>=expand("<cword>")<CR><CR>
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408 map g<C-\> :cs find 0 <C-R>=expand("<cword>")<CR><CR>
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409
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410 These mappings for Ctrl-] (right bracket) and Ctrl-\ (backslash) allow you to
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411 place your cursor over the function name or C symbol and quickly query cscope
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412 for any matches.
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413
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414 Or you may use the following scheme, inspired by Vim/Cscope tutorial from
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415 Cscope Home Page (http://cscope.sourceforge.net/): >
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416
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417 nmap <C-_>s :cs find s <C-R>=expand("<cword>")<CR><CR>
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418 nmap <C-_>g :cs find g <C-R>=expand("<cword>")<CR><CR>
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419 nmap <C-_>c :cs find c <C-R>=expand("<cword>")<CR><CR>
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420 nmap <C-_>t :cs find t <C-R>=expand("<cword>")<CR><CR>
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421 nmap <C-_>e :cs find e <C-R>=expand("<cword>")<CR><CR>
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422 nmap <C-_>f :cs find f <C-R>=expand("<cfile>")<CR><CR>
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423 nmap <C-_>i :cs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
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424 nmap <C-_>d :cs find d <C-R>=expand("<cword>")<CR><CR>
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425
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426 " Using 'CTRL-spacebar' then a search type makes the vim window
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427 " split horizontally, with search result displayed in
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428 " the new window.
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429
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430 nmap <C-Space>s :scs find s <C-R>=expand("<cword>")<CR><CR>
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431 nmap <C-Space>g :scs find g <C-R>=expand("<cword>")<CR><CR>
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432 nmap <C-Space>c :scs find c <C-R>=expand("<cword>")<CR><CR>
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433 nmap <C-Space>t :scs find t <C-R>=expand("<cword>")<CR><CR>
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434 nmap <C-Space>e :scs find e <C-R>=expand("<cword>")<CR><CR>
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435 nmap <C-Space>f :scs find f <C-R>=expand("<cfile>")<CR><CR>
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436 nmap <C-Space>i :scs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
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437 nmap <C-Space>d :scs find d <C-R>=expand("<cword>")<CR><CR>
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438
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439 " Hitting CTRL-space *twice* before the search type does a vertical
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440 " split instead of a horizontal one
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441
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442 nmap <C-Space><C-Space>s
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443 \:vert scs find s <C-R>=expand("<cword>")<CR><CR>
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444 nmap <C-Space><C-Space>g
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445 \:vert scs find g <C-R>=expand("<cword>")<CR><CR>
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446 nmap <C-Space><C-Space>c
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447 \:vert scs find c <C-R>=expand("<cword>")<CR><CR>
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448 nmap <C-Space><C-Space>t
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449 \:vert scs find t <C-R>=expand("<cword>")<CR><CR>
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450 nmap <C-Space><C-Space>e
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451 \:vert scs find e <C-R>=expand("<cword>")<CR><CR>
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452 nmap <C-Space><C-Space>i
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453 \:vert scs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
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454 nmap <C-Space><C-Space>d
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455 \:vert scs find d <C-R>=expand("<cword>")<CR><CR>
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456
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457 ==============================================================================
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458 7. Cscope availability and information *cscope-info*
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459
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460 If you do not already have cscope (it did not come with your compiler
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461 license or OS distribution), then you can download it for free from:
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462 http://cscope.sourceforge.net/
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463 This is released by SCO under the BSD license.
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464
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465 If you want a newer version of cscope, you will probably have to buy it.
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466 According to the (old) nvi documentation:
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467
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468 You can buy version 13.3 source with an unrestricted license
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469 for $400 from AT&T Software Solutions by calling +1-800-462-8146.
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470
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471 Also you can download cscope 13.x and mlcscope 14.x (multi-lingual cscope
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472 which supports C, C++, Java, lex, yacc, breakpoint listing, Ingres, and SDL)
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473 from World-Wide Exptools Open Source packages page:
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474 http://www.bell-labs.com/project/wwexptools/packages.html
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475
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476 In Solaris 2.x, if you have the C compiler license, you will also have
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477 cscope. Both are usually located under /opt/SUNWspro/bin
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478
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479 SGI developers can also get it. Search for Cscope on this page:
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480 http://freeware.sgi.com/index-by-alpha.html
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481 https://toolbox.sgi.com/toolbox/utilities/cscope/
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482 The second one is for those who have a password for the SGI toolbox.
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483
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484 There is source to an older version of a cscope clone (called "cs") available
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485 on the net. Due to various reasons, this is not supported with Vim.
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486
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487 The cscope interface/support for Vim was originally written by
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488 Andy Kahn <ackahn@netapp.com>. The original structure (as well as a tiny
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489 bit of code) was adapted from the cscope interface in nvi. Please report
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490 any problems, suggestions, patches, et al., you have for the usage of
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491 cscope within Vim to him.
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492 *cscope-win32*
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1949
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493 For a cscope version for Win32 see:
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494 http://code.google.com/p/cscope-win32/
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7
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495
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236
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496 Win32 support was added by Sergey Khorev <sergey.khorev@gmail.com>. Contact
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147
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497 him if you have Win32-specific issues.
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7
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498
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499 vim:tw=78:ts=8:ft=help:norl:
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