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- REF(1) UNIX Programmer's Manual REF(1)
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- NNNNAAAAMMMMEEEE
- ref - Display a C function header
-
- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- rrrreeeeffff [-t] [-c _c_l_a_s_s]... [-f _f_i_l_e]... _t_a_g
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _r_e_f quickly locates and displays the header of a function.
- To do this, _r_e_f looks in the "tags" file for the line that
- describes the function, and then scans the source file for
- the function. When it locates the function, it displays an
- introductory comment (if there is one), the function's
- declaration, and the declarations of all arguments.
-
- SSSSEEEEAAAARRRRCCCCHHHH MMMMEEEETTTTHHHHOOOODDDD
- _r_e_f uses a fairly sophisticated tag look-up algorithm. If
- you supply a filename via ----ffff _f_i_l_e, then elvis first scans
- the tags file for a static tag from that file. This search
- is limited to the tags file in the current directory.
-
- If you supply a classname via ----cccc _c_l_a_s_s, then elvis searches
- for a tag from that class. This search is not limited to
- the current directory; You can supply a list of directories
- in the environment variable _T_A_G_P_A_T_H, and _r_e_f will search
- through the "tags" file in each directory until it finds a
- tag in the desired class.
-
- If that fails, _r_e_f will then try to look up an ordinary glo-
- bal tag. This search checks all of the directories listed
- in _T_A_G_P_A_T_H, too.
-
- If you've given the ----tttt flag, then _r_e_f will simply output the
- tag line that it found, and then exit. Without ----tttt, though,
- _r_e_f will search for the tag line. It will try to open the
- source file, which should be in the same directory as the
- tags file where the tag was discovered. If the source file
- doesn't exist, or is unreadable, then _r_e_f will try to open a
- file called "_r_e_f_s" in that directory. Either way, _r_e_f will
- try to locate the tag, and display whatever it finds.
-
- IIIINNNNTTTTEEEERRRRAAAACCCCTTTTIIIIOOOONNNN WWWWIIIITTTTHHHH EEEELLLLVVVVIIIISSSS
- _r_e_f is used by _e_l_v_i_s' shift-K command. If the cursor is
- located on a word such as "splat", in the file "foo.c", then
- _e_l_v_i_s will invoke _r_e_f with the command "ref -f foo.c splat".
-
- If _e_l_v_i_s has been compiled with the -DEXTERNAL_TAGS flag,
- then _e_l_v_i_s will use _r_e_f to scan the tags files. This is
- slower than the built-in tag searching, but it allows _e_l_v_i_s
- to access the more sophisticated tag lookup provided by _r_e_f.
- Other than that, external tags should act exactly like
- internal tags.
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- Printed 6/13/92 1
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- REF(1) UNIX Programmer's Manual REF(1)
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- OOOOPPPPTTTTIIIIOOOONNNNSSSS
- ----tttt Output tag info, instead of the function header.
-
- ----ffff _f_i_l_e
- The tag might be a static function in _f_i_l_e. You can
- use several -f flags to have _r_e_f consider static tags
- from more than one file.
-
- ----cccc _c_l_a_s_s
- The tag might be a member of class _c_l_a_s_s. You can use
- several -c flags to have _r_e_f consider tags from more
- than one class.
-
- FFFFIIIILLLLEEEESSSS
- ttttaaaaggggssss List of function names and their locations, generated
- by _c_t_a_g_s.
-
- rrrreeeeffffssss Function headers extracted from source files
- (optional).
-
- EEEENNNNVVVVIIIIRRRROOOONNNNMMMMEEEENNNNTTTT
- TTTTAAAAGGGGPPPPAAAATTTTHHHH
- List of directories to be searched. The elements in
- the list are separated by either semicolons (for MS-
- DOS, Atari TOS, and AmigaDos), or by colons (every
- other operating system). For each operating system,
- _r_e_f has a built-in default which is probably adequate.
-
- NNNNOOOOTTTTEEEESSSS
- You might want to generate a "tags" file the directory that
- contains the source code for standard C library on your sys-
- tem. If licensing restrictions prevent you from making the
- library source readable by everybody, then you can have
- _c_t_a_g_s generate a "refs" file, and make "refs" readable by
- everybody.
-
- If your system doesn't come with the library source code,
- then perhaps you can produce something workable from the
- _l_i_n_t libraries.
-
- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- elvis(1), ctags(1)
-
- AAAAUUUUTTTTHHHHOOOORRRR
- Steve Kirkendall
- kirkenda@cs.pdx.edu
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- Printed 6/13/92 2
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