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| 1 : | anton | 1.1 | \ Etags support for GNU Forth. |
| 2 : | |||
| 3 : | \ This does not work like etags; instead, the TAGS file is updated | ||
| 4 : | \ during the normal Forth interpretation/compilation process. | ||
| 5 : | |||
| 6 : | \ The present version has several shortcomings: It always overwrites | ||
| 7 : | \ the TAGS file instead of just the parts corresponding to the loaded | ||
| 8 : | \ files, but you can have several tag tables in emacs. Every load | ||
| 9 : | \ creates a new etags file and the user has to confirm that she wants | ||
| 10 : | \ to use it. | ||
| 11 : | |||
| 12 : | \ Communication of interactive programs like emacs and Forth over | ||
| 13 : | \ files is clumsy. There should be better cooperation between them | ||
| 14 : | \ (e.g. via shared memory) | ||
| 15 : | |||
| 16 : | \ This is ANS Forth with the following serious environmental | ||
| 17 : | \ dependences: the variable LAST must contain a pointer to the last | ||
| 18 : | \ header, NAME>STRING must convert that pointer to a string, and | ||
| 19 : | \ HEADER must be a deferred word that is called to create the name. | ||
| 20 : | |||
| 21 : | : tags-file-name ( -- c-addr u ) | ||
| 22 : | \ for now I use just TAGS; this may become more flexible in the | ||
| 23 : | \ future | ||
| 24 : | s" TAGS" ; | ||
| 25 : | |||
| 26 : | variable tags-file 0 tags-file ! | ||
| 27 : | |||
| 28 : | create tags-line 128 chars allot | ||
| 29 : | |||
| 30 : | : skip-tags ( file-id -- ) | ||
| 31 : | \ reads in file until it finds the end or the loadfilename | ||
| 32 : | drop ; | ||
| 33 : | |||
| 34 : | : tags-file-id ( -- file-id ) | ||
| 35 : | tags-file @ 0= if | ||
| 36 : | tags-file-name w/o create-file throw | ||
| 37 : | \ 2dup file-status | ||
| 38 : | \ if \ the file does not exist | ||
| 39 : | \ drop w/o create-file throw | ||
| 40 : | \ else | ||
| 41 : | \ drop r/w open-file throw | ||
| 42 : | \ dup skip-tags | ||
| 43 : | \ endif | ||
| 44 : | tags-file ! | ||
| 45 : | endif | ||
| 46 : | tags-file @ ; | ||
| 47 : | |||
| 48 : | create emit-file-char 0 c, | ||
| 49 : | |||
| 50 : | : emit-file ( c file-id -- ) | ||
| 51 : | swap emit-file-char c! | ||
| 52 : | emit-file-char 1 chars rot write-file ; | ||
| 53 : | |||
| 54 : | 2variable last-loadfilename 0 0 last-loadfilename 2! | ||
| 55 : | |||
| 56 : | : put-load-file-name ( file-id -- ) | ||
| 57 : | >r | ||
| 58 : | loadfilename 2@ last-loadfilename 2@ d<> | ||
| 59 : | if | ||
| 60 : | #ff r@ emit-file throw | ||
| 61 : | #lf r@ emit-file throw | ||
| 62 : | loadfilename 2@ 2dup | ||
| 63 : | r@ write-file throw | ||
| 64 : | last-loadfilename 2! | ||
| 65 : | s" ,0" r@ write-line throw | ||
| 66 : | endif | ||
| 67 : | rdrop ; | ||
| 68 : | |||
| 69 : | : put-tags-entry ( -- ) | ||
| 70 : | \ write the entry for the last name to the TAGS file | ||
| 71 : | \ if the input is from a file and it is not a local name | ||
| 72 : | source-id dup 0<> swap -1 <> and \ input from a file | ||
| 73 : | get-current locals-list <> and \ not a local name | ||
| 74 : | last @ 0<> and \ not an anonymous (i.e. noname) header | ||
| 75 : | if | ||
| 76 : | tags-file-id >r | ||
| 77 : | r@ put-load-file-name | ||
| 78 : | source drop >in @ r@ write-file throw | ||
| 79 : | 127 r@ emit-file throw | ||
| 80 : | pazsan | 1.2 | bl r@ emit-file throw |
| 81 : | anton | 1.1 | last @ name>string r@ write-file throw |
| 82 : | pazsan | 1.2 | bl r@ emit-file throw |
| 83 : | anton | 1.1 | 1 r@ emit-file throw |
| 84 : | base @ decimal loadline @ 0 <# #s #> r@ write-file throw base ! | ||
| 85 : | s" ,0" r@ write-line throw | ||
| 86 : | \ the character position in the file; not strictly necessary AFAIK | ||
| 87 : | \ instead of using 0, we could use file-position and subtract | ||
| 88 : | \ the line length | ||
| 89 : | rdrop | ||
| 90 : | pazsan | 1.2 | endif cr ; |
| 91 : | anton | 1.1 | |
| 92 : | : (tags-header) ( -- ) | ||
| 93 : | defers header | ||
| 94 : | put-tags-entry ; | ||
| 95 : | |||
| 96 : | ' (tags-header) IS header |
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