1 /* Process target.def to create initialization macros definition in
2 target-hooks-def.h and documentation in target-hooks.texi.
3 Copyright (C) 2009-2022 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 struct hook_desc { const char *doc, *type, *name, *param, *init, *docname; };
25 static struct hook_desc hook_array[] = {
26 #define HOOK_VECTOR_1(NAME, FRAGMENT) \
27 { 0, 0, #NAME, 0, 0, HOOK_TYPE },
28 #define DEFHOOKPOD(NAME, DOC, TYPE, INIT) \
29 { DOC, #TYPE, HOOK_PREFIX #NAME, 0, #INIT, HOOK_TYPE },
30 #define DEFHOOK(NAME, DOC, TYPE, PARAMS, INIT) \
31 { DOC, #TYPE, HOOK_PREFIX #NAME, #PARAMS, #INIT, HOOK_TYPE },
32 #define DEFHOOK_UNDOC(NAME, DOC, TYPE, PARAMS, INIT) \
33 { "*", #TYPE, HOOK_PREFIX #NAME, #PARAMS, #INIT, HOOK_TYPE },
35 #include "c-family/c-target.def"
36 #include "common/common-target.def"
37 #include "d/d-target.def"
41 /* Return an upper-case copy of IN. */
43 upstrdup (const char *in)
45 char *p, *ret = xstrdup (in);
46 for (p = ret; *p; p++)
51 /* Struct for 'start hooks' which start a sequence of consecutive hooks
52 that are defined in target.def and to be documented in tm.texi. */
60 s_hook_hash (const void *p)
62 const struct s_hook *s_hook = (const struct s_hook *)p;
63 return htab_hash_string (s_hook->name);
67 s_hook_eq_p (const void *p1, const void *p2)
69 return (strcmp (((const struct s_hook *) p1)->name,
70 ((const struct s_hook *) p2)->name) == 0);
73 /* Read the documentation file with name IN_FNAME, perform substitutions
74 to incorporate information from hook_array, and emit the result on stdout.
75 Hooks defined with DEFHOOK / DEFHOOKPOD are emitted at the place of a
76 matching @hook in the input file; if there is no matching @hook, the
77 hook is emitted after the hook that precedes it in target.def .
78 Usually, the emitted hook documentation starts with the hook
79 signature, followed by the string from the doc field.
80 The documentation is bracketed in @deftypefn / @deftypevr and a matching
82 While emitting the doc field, an @findex entry is added
83 to the affected paragraph.
84 If the doc field starts with '*', the leading '*' is stripped, and the doc
85 field is otherwise emitted unaltered; no function signature/
86 @deftypefn/deftypevr/@end is emitted.
87 In particular, a doc field of "*" means not to emit any ocumentation for
88 this target.def / hook_array entry at all (there might be documentation
89 for this hook in the file named IN_FNAME, though).
90 A doc field of 0 is used to append the hook signature after the previous
91 hook's signture, so that one description can be used for a group of hooks.
92 When the doc field is "", @deftypefn/@deftypevr and the hook signature
93 is emitted, but not the matching @end. This allows all the free-form
94 documentation to be placed in IN_FNAME, to work around GPL/GFDL
95 licensing incompatibility issues. */
97 emit_documentation (const char *in_fname)
101 htab_t start_hooks = htab_create (99, s_hook_hash, s_hook_eq_p, (htab_del) 0);
104 /* Enter all the start hooks in start_hooks. */
105 f = fopen (in_fname, "r");
109 fatal ("Couldn't open input file");
111 while (fscanf (f, "%*[^@]"), buf[0] = '\0',
112 fscanf (f, "@%5[^ \n]", buf) != EOF)
117 if (strcmp (buf, "hook") != 0)
120 fscanf (f, "%999s", buf);
121 shp = XNEW (struct s_hook);
122 shp->name = upstrdup (buf);
124 p = htab_find_slot (start_hooks, shp, INSERT);
125 if (*p != HTAB_EMPTY_ENTRY)
126 fatal ("Duplicate placement for hook %s\n", shp->name);
127 *(struct s_hook **) p = shp;
130 /* For each hook in hook_array, if it is a start hook, store its position. */
131 for (i = 0; i < (int) (ARRAY_SIZE (hook_array)); i++)
133 struct s_hook sh, *shp;
136 if (!hook_array[i].doc || strcmp (hook_array[i].doc, "*") == 0)
138 sh.name = upstrdup (hook_array[i].name);
139 p = htab_find (start_hooks, &sh);
142 shp = (struct s_hook *) p;
144 fatal ("Duplicate hook %s\n", sh.name);
148 fatal ("No place specified to document hook %s\n", sh.name);
151 /* Copy input file to stdout, substituting @hook directives with the
152 corresponding hook documentation sequences. */
153 f = fopen (in_fname, "r");
157 fatal ("Couldn't open input file");
161 struct s_hook sh, *shp;
173 fscanf (f, "%5[^ \n]", buf);
174 if (strcmp (buf, "hook") != 0)
179 fscanf (f, "%999s", buf);
180 sh.name = name = upstrdup (buf);
181 shp = (struct s_hook *) htab_find (start_hooks, &sh);
182 if (!shp || shp->pos < 0)
183 fatal ("No documentation for hook %s\n", sh.name);
189 const char *doc, *p_end;
191 /* A leading '*' means to output the documentation string without
192 further processing. */
193 if (*hook_array[i].doc == '*')
194 printf ("%s", hook_array[i].doc + 1);
200 /* Print header. Function-valued hooks have a parameter list,
201 unlike POD-valued ones. */
202 deftype = hook_array[i].param ? "deftypefn" : "deftypevr";
203 printf ("@%s {%s} ", deftype, hook_array[i].docname);
204 if (strchr (hook_array[i].type, ' '))
205 printf ("{%s}", hook_array[i].type);
207 printf ("%s", hook_array[i].type);
208 printf (" %s", name);
209 if (hook_array[i].param)
211 /* Print the parameter list, with the parameter names
212 enclosed in @var{}. */
214 for (q = hook_array[i].param; (e = strpbrk (q, " *,)"));
216 /* Type names like 'int' are followed by a space, sometimes
217 also by '*'. 'void' should appear only in "(void)". */
218 if (*e == ' ' || *e == '*' || *q == '(')
219 printf ("%.*s", (int) (e - q + 1), q);
221 printf ("@var{%.*s}%c", (int) (e - q), q, *e);
223 /* POD-valued hooks sometimes come in groups with common
226 j < (int) (ARRAY_SIZE (hook_array))
227 && hook_array[j].doc == 0 && hook_array[j].type; j++)
229 char *namex = upstrdup (hook_array[j].name);
231 printf ("\n@%sx {%s} {%s} %s",
232 deftype, hook_array[j].docname,
233 hook_array[j].type, namex);
235 if (hook_array[i].doc[0])
238 /* Print each documentation paragraph in turn. */
239 for (doc = hook_array[i].doc; *doc; doc = p_end)
241 /* Find paragraph end. */
242 p_end = strstr (doc, "\n\n");
243 p_end = (p_end ? p_end + 2 : doc + strlen (doc));
244 printf ("%.*s", (int) (p_end - doc), doc);
246 printf ("\n@end %s", deftype);
249 if (++i >= (int) (ARRAY_SIZE (hook_array)) || !hook_array[i].doc)
252 sh.name = name = upstrdup (hook_array[i].name);
254 while (!htab_find (start_hooks, &sh));
259 /* Emit #defines to stdout (this will be redirected to generate
260 target-hook-def.h) which set target hooks initializer macros
261 to their default values. These should only be emitted for hooks
262 whose type is given by DOCNAME. */
264 emit_init_macros (const char *docname)
267 const int MAX_NEST = 2;
268 int print_nest, nest = 0;
270 for (print_nest = 0; print_nest <= MAX_NEST; print_nest++)
272 for (i = 0; i < (int) (ARRAY_SIZE (hook_array)); i++)
274 char *name = upstrdup (hook_array[i].name);
276 if (strcmp (hook_array[i].docname, docname) != 0)
279 if (!hook_array[i].type)
283 if (nest && nest == print_nest)
284 printf (" %s, \\\n", name);
287 fatal ("Unexpected nesting of %s\n", name);
288 if (nest == print_nest)
289 printf ("\n#define %s \\\n { \\\n", name);
293 if (nest == print_nest)
301 /* Output default definitions of target hooks. */
302 printf ("#ifndef %s\n#define %s %s\n#endif\n",
303 name, name, hook_array[i].init);
305 if (nest == print_nest)
306 printf (" %s, \\\n", name);
312 main (int argc, char **argv)
314 progname = "genhooks";
317 emit_documentation (argv[2]);
319 emit_init_macros (argv[1]);