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375 lines
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375 lines
14 KiB
Plaintext
*if_cscop.txt* Nvim
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VIM REFERENCE MANUAL by Andy Kahn
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*cscope* *Cscope*
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Cscope is a "code intelligence" tool that helps you navigate C programs. It
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can also perform some refactoring tasks, such as renaming a global variable in
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all source files. Think of it as "ctags on steroids".
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See |cscope-usage| for a quickstart.
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Type |gO| to see the table of contents.
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==============================================================================
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Cscope introduction *cscope-intro*
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Cscope is designed to answer questions like:
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Where is this symbol used?
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Where is it defined?
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Where did this variable get its value?
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What is this global symbol's definition?
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Where is this function in the source files?
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What functions call this function?
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What functions are called by this function?
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Where does the message "out of space" come from?
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Where is this source file in the directory structure?
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What files include this header file?
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Cscope answers these questions from a symbol database that it builds the first
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time it is used on the source files. On a subsequent call, cscope rebuilds
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the database only if a source file has changed or the list of source files is
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different. When the database is rebuilt the data for the unchanged files is
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copied from the old database, which makes rebuilding much faster than the
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initial build.
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See |cscope-usage| to get started.
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==============================================================================
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Cscope commands *cscope-commands*
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*:cscope* *:cs* *:scs* *:scscope* *E259* *E262* *E560* *E561*
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All cscope commands are accessed through suboptions to the cscope commands.
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`:cscope` or `:cs` is the main command
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`:scscope` or `:scs` does the same and splits the window
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`:lcscope` or `:lcs` uses the location list, see |:lcscope|
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The available subcommands are:
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*E563* *E564* *E566* *E568* *E622* *E623* *E625*
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*E626* *E609*
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add : Add a new cscope database/connection.
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USAGE :cs add {file|dir} [pre-path] [flags]
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[pre-path] is the pathname used with the -P command to cscope.
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[flags] are any additional flags you want to pass to cscope.
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EXAMPLES >
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:cscope add /usr/local/cdb/cscope.out
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:cscope add /projects/vim/cscope.out /usr/local/vim
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:cscope add cscope.out /usr/local/vim -C
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<
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*cscope-find* *cs-find* *E567*
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find : Query cscope. All cscope query options are available
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except option #5 ("Change this grep pattern").
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USAGE :cs find {querytype} {name}
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{querytype} corresponds to the actual cscope line
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interface numbers as well as default nvi commands:
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0 or s: Find this C symbol
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1 or g: Find this definition
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2 or d: Find functions called by this function
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3 or c: Find functions calling this function
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4 or t: Find this text string
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6 or e: Find this egrep pattern
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7 or f: Find this file
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8 or i: Find files #including this file
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9 or a: Find places where this symbol is assigned a value
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For all types, except 4 and 6, leading white space for {name} is
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removed. For 4 and 6 there is exactly one space between {querytype}
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and {name}. Further white space is included in {name}.
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EXAMPLES >
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:cscope find c vim_free
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:cscope find 3 vim_free
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<
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These two examples perform the same query: functions calling
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"vim_free". >
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:cscope find t initOnce
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:cscope find t initOnce
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<
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The first one searches for the text "initOnce", the second one for
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" initOnce". >
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:cscope find 0 DEFAULT_TERM
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<
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Executing this example on the source code for Vim 5.1 produces the
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following output:
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Cscope tag: DEFAULT_TERM
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# line filename / context / line
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1 1009 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"amiga"
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2 1013 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"win32"
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3 1017 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"pcterm"
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4 1021 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"ansi"
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5 1025 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"vt52"
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6 1029 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"os2ansi"
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7 1033 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"ansi"
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8 1037 vim-5.1-gtk/src/term.c <<GLOBAL>>
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# undef DEFAULT_TERM
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9 1038 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"beos-ansi"
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10 1042 vim-5.1-gtk/src/term.c <<GLOBAL>>
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#define DEFAULT_TERM (char_u *)"mac-ansi"
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11 1335 vim-5.1-gtk/src/term.c <<set_termname>>
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term = DEFAULT_TERM;
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12 1459 vim-5.1-gtk/src/term.c <<set_termname>>
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if (STRCMP(term, DEFAULT_TERM))
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13 1826 vim-5.1-gtk/src/term.c <<termcapinit>>
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term = DEFAULT_TERM;
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14 1833 vim-5.1-gtk/src/term.c <<termcapinit>>
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term = DEFAULT_TERM;
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15 3635 vim-5.1-gtk/src/term.c <<update_tcap>>
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p = find_builtin_term(DEFAULT_TERM);
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Enter nr of choice (<CR> to abort):
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The output shows several pieces of information:
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1. The tag number (there are 15 in this example).
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2. The line number where the tag occurs.
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3. The filename where the tag occurs.
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4. The context of the tag (e.g., global, or the function name).
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5. The line from the file itself.
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help : Show a brief synopsis.
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USAGE :cs help
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*E261*
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kill : Kill a cscope connection (or kill all cscope connections).
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USAGE :cs kill {num|partial_name}
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To kill a cscope connection, the connection number or a partial
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name must be specified. The partial name is simply any part of
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the pathname of the cscope database. Kill a cscope connection
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using the partial name with caution!
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If the specified connection number is -1, then _ALL_ cscope
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connections will be killed.
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reset : Reinit all cscope connections.
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USAGE :cs reset
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show : Show cscope connections.
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USAGE :cs show
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*:lcscope* *:lcs*
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This command is same as the ":cscope" command, except when the
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'cscopequickfix' option is set, the location list for the current window is
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used instead of the quickfix list to show the cscope results.
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*:cstag* *E257* *E562*
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If you use cscope as well as ctags, |:cstag| allows you to search one or
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the other before making a jump. For example, you can choose to first
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search your cscope database(s) for a match, and if one is not found, then
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your tags file(s) will be searched. The order in which this happens
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is determined by the value of |csto|. See |cscope-options| for more
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details.
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|:cstag| performs the equivalent of ":cs find g" on the identifier when
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searching through the cscope database(s).
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|:cstag| performs the equivalent of |:tjump| on the identifier when searching
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through your tags file(s).
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==============================================================================
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Cscope options *cscope-options*
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Use the |:set| command to set all cscope options. Ideally, you would do
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this in one of your startup files (e.g., vimrc). Some cscope related
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variables are only valid within |init.vim|. Setting them after vim has
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started will have no effect!
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*cscopeprg* *csprg*
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'cscopeprg' specifies the command to execute cscope. The default is
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"cscope". For example: >
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:set csprg=/usr/local/bin/cscope
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<
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*cscopequickfix* *csqf* *E469*
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'cscopequickfix' specifies whether to use quickfix window to show cscope
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results. This is a list of comma-separated values. Each item consists of
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|cscope-find| command (s, g, d, c, t, e, f, i or a) and flag (+, - or 0).
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'+' indicates that results must be appended to quickfix window,
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'-' implies previous results clearance, '0' or command absence - don't use
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quickfix. Search is performed from start until first command occurrence.
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The default value is "" (don't use quickfix anyway). The following value
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seems to be useful: >
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:set cscopequickfix=s-,c-,d-,i-,t-,e-,a-
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<
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*cscopetag* *cst*
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If 'cscopetag' is set, the commands ":tag" and CTRL-] as well as "vim -t"
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will always use |:cstag| instead of the default :tag behavior. Effectively,
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by setting 'cst', you will always search your cscope databases as well as
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your tag files. The default is off.
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*cscoperelative* *csre*
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If 'cscoperelative' is set, then in absence of a prefix given to cscope
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(prefix is the argument of -P option of cscope), basename of cscope.out
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location (usually the project root directory) will be used as the prefix
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to construct an absolute path. The default is off. Note: This option is
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only effective when cscope (cscopeprg) is initialized without a prefix
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path (-P).
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*cscopetagorder* *csto*
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The value of 'csto' determines the order in which |:cstag| performs a search.
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If 'csto' is set to zero, cscope database(s) are searched first, followed
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by tag file(s) if cscope did not return any matches. If 'csto' is set to
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one, tag file(s) are searched before cscope database(s). The default is zero.
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*cscopepathcomp* *cspc*
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'cscopepathcomp' determines how many components of a file's path to display.
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With the default value of zero the entire path will be displayed.
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The value one will display only the filename with no path. Other values
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display that many components. For example: >
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:set cscopepathcomp=3
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will display the last 3 components of the file's path, including the file
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name itself.
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==============================================================================
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Using cscope in Nvim *cscope-usage* *cscope-howtouse*
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To get started, build the cscope database in your project root directory: >
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cscope -bcqR
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See the cscope manpage for details: >
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:Man cscope
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By default the cscope database file is named "cscope.out". After building the
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database, connect to it from Nvim: >
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:cscope add cscope.out
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That establishes a cscope connection for Nvim to use. You can check the
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result with ":cs show". It will show something like:
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# pid database name prepend path
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0 28806 cscope.out <none>
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Once a cscope connection is established, you can make queries to cscope and
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the results will be printed. Queries are made using the command ":cs find".
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For example: >
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:cs find g ALIGN_SIZE
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To make this easier you can configure mappings, see |cscope-suggestions|.
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If the results return only one match, you will automatically be taken to it.
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If there is more than one match, you will be given a selection screen to pick
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the match you want to go to. After you have jumped to the new location,
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simply hit Ctrl-T to get back to the previous one.
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==============================================================================
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Limitations *cscope-limitations*
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Hard-coded limitation: doing a |:tjump| when |:cstag| searches the tag files
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is not configurable (e.g., you can't do a tselect instead).
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==============================================================================
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Sample config *cscope-suggestions*
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Copy this into your init.vim (adjust paths for your system): >
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if has("cscope")
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set csprg=/usr/local/bin/cscope
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set csto=0
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set cst
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" add any database in current directory
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if filereadable("cscope.out")
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silent cs add cscope.out
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" else add database pointed to by environment
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elseif $CSCOPE_DB != ""
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silent cs add $CSCOPE_DB
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endif
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endif
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By setting 'cscopetag', we have effectively replaced all instances of the :tag
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command with :cstag. This includes :tag, Ctrl-], and "vim -t". In doing
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this, the regular tag command not only searches your ctags generated tag
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files, but your cscope databases as well.
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Some users may want to keep the regular tag behavior and have a different
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shortcut to access :cstag. For example, one could map Ctrl-_ (underscore)
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to :cstag with the following command: >
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map <C-_> :cstag <C-R>=expand("<cword>")<CR><CR>
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A couple of very commonly used cscope queries (using ":cs find") is to
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find all functions calling a certain function and to find all occurrences
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of a particular C symbol. To do this, you can use these mappings as an
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example: >
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map g<C-]> :cs find 3 <C-R>=expand("<cword>")<CR><CR>
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map g<C-\> :cs find 0 <C-R>=expand("<cword>")<CR><CR>
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These mappings for Ctrl-] (right bracket) and Ctrl-\ (backslash) allow you to
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place your cursor over the function name or C symbol and quickly query cscope
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for any matches.
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Or you may use the following scheme, inspired by Vim/Cscope tutorial from
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Cscope Home Page (http://cscope.sourceforge.net/): >
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nmap <C-_>s :cs find s <C-R>=expand("<cword>")<CR><CR>
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nmap <C-_>g :cs find g <C-R>=expand("<cword>")<CR><CR>
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nmap <C-_>c :cs find c <C-R>=expand("<cword>")<CR><CR>
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nmap <C-_>t :cs find t <C-R>=expand("<cword>")<CR><CR>
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nmap <C-_>e :cs find e <C-R>=expand("<cword>")<CR><CR>
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nmap <C-_>f :cs find f <C-R>=expand("<cfile>")<CR><CR>
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nmap <C-_>i :cs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
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nmap <C-_>d :cs find d <C-R>=expand("<cword>")<CR><CR>
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nmap <C-_>a :cs find a <C-R>=expand("<cword>")<CR><CR>
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" Using 'CTRL-spacebar' then a search type makes the vim window
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" split horizontally, with search result displayed in
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" the new window.
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nmap <C-Space>s :scs find s <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space>g :scs find g <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space>c :scs find c <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space>t :scs find t <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space>e :scs find e <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space>f :scs find f <C-R>=expand("<cfile>")<CR><CR>
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nmap <C-Space>i :scs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
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nmap <C-Space>d :scs find d <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space>a :scs find a <C-R>=expand("<cword>")<CR><CR>
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" Hitting CTRL-space *twice* before the search type does a vertical
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" split instead of a horizontal one
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nmap <C-Space><C-Space>s
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\:vert scs find s <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space><C-Space>g
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\:vert scs find g <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space><C-Space>c
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\:vert scs find c <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space><C-Space>t
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\:vert scs find t <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space><C-Space>e
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\:vert scs find e <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space><C-Space>i
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\:vert scs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
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nmap <C-Space><C-Space>d
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\:vert scs find d <C-R>=expand("<cword>")<CR><CR>
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nmap <C-Space><C-Space>a
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\:vert scs find a <C-R>=expand("<cword>")<CR><CR>
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<
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vim:tw=78:ts=8:noet:ft=help:norl:
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