* pa/pa.c (compute_movstrsi_length): Handle residuals correctly.
[official-gcc.git] / gcc / gen-protos.c
blob0284c18ba4a566742bb471fede8b26c6be8609bb
1 /* gen-protos.c - massages a list of prototypes, for use by fixproto.
2 Copyright (C) 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation; either version 2, or (at your option) any
7 later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 #include <stdio.h>
19 #include <ctype.h>
20 #include "hconfig.h"
21 #include "scan.h"
22 #include "cpplib.h"
23 #include "cpphash.h"
25 int verbose = 0;
26 char *progname;
28 #define HASH_SIZE 2503 /* a prime */
29 int hash_tab[HASH_SIZE];
30 int next_index;
32 static int
33 hashf (name, len, hashsize)
34 register U_CHAR *name;
35 register int len;
36 int hashsize;
38 register int r = 0;
40 while (len--)
41 r = HASHSTEP (r, *name++);
43 return MAKE_POS (r) % hashsize;
46 static void
47 add_hash (fname)
48 char *fname;
50 int i, i0;
52 /* NOTE: If you edit this, also edit lookup_std_proto in fix-header.c !! */
53 i = hashf (fname, strlen (fname), HASH_SIZE);
54 i0 = i;
55 if (hash_tab[i] != 0)
57 for (;;)
59 i = (i+1) % HASH_SIZE;
60 if (i == i0)
61 abort ();
62 if (hash_tab[i] == 0)
63 break;
66 hash_tab[i] = next_index;
68 next_index++;
71 /* Given a function prototype, fill in the fields of FN.
72 The result is a boolean indicating if a function prototype was found.
74 The input string is modified (trailing NULs are inserted).
75 The fields of FN point to the input string. */
77 static int
78 parse_fn_proto (start, end, fn)
79 char *start, *end;
80 struct fn_decl *fn;
82 register char *ptr;
83 int param_nesting = 1;
84 char *param_start, *param_end, *decl_start, *name_start, *name_end;
86 ptr = end - 1;
87 while (*ptr == ' ' || *ptr == '\t') ptr--;
88 if (*ptr-- != ';')
90 fprintf (stderr, "Funny input line: %s\n", start);
91 return 0;
93 while (*ptr == ' ' || *ptr == '\t') ptr--;
94 if (*ptr != ')')
96 fprintf (stderr, "Funny input line: %s\n", start);
97 return 0;
99 param_end = ptr;
100 for (;;)
102 int c = *--ptr;
103 if (c == '(' && --param_nesting == 0)
104 break;
105 else if (c == ')')
106 param_nesting++;
108 param_start = ptr+1;
110 ptr--;
111 while (*ptr == ' ' || *ptr == '\t') ptr--;
113 if (!isalnum (*ptr))
115 if (verbose)
116 fprintf (stderr, "%s: Can't handle this complex prototype: %s\n",
117 progname, start);
118 return 0;
120 name_end = ptr+1;
122 while (isalnum (*ptr) || *ptr == '_') --ptr;
123 name_start = ptr+1;
124 while (*ptr == ' ' || *ptr == '\t') ptr--;
125 ptr[1] = 0;
126 *param_end = 0;
127 *name_end = 0;
129 decl_start = start;
130 if (strncmp (decl_start, "typedef ", 8) == 0)
131 return 0;
132 if (strncmp (decl_start, "extern ", 7) == 0)
133 decl_start += 7;
135 fn->fname = name_start;
136 fn->rtype = decl_start;
137 fn->params = param_start;
138 return 1;
142 main (argc, argv)
143 int argc;
144 char **argv;
146 FILE *inf = stdin;
147 FILE *outf = stdout;
148 int i;
149 sstring linebuf;
150 char **optr;
151 struct fn_decl fn_decl;
153 i = strlen (argv[0]);
154 while (i > 0 && argv[0][i-1] != '/') --i;
155 progname = &argv[0][i];
157 INIT_SSTRING (&linebuf);
159 fprintf (outf, "struct fn_decl std_protos[] = {\n");
161 /* A hash table entry of 0 means "unused" so reserve it. */
162 fprintf (outf, " {\"\", \"\", \"\"},\n");
163 next_index = 1;
165 for (;;)
167 int c = skip_spaces (inf, ' ');
169 if (c == EOF)
170 break;
171 linebuf.ptr = linebuf.base;
172 ungetc (c, inf);
173 c = read_upto (inf, &linebuf, '\n');
174 if (linebuf.base[0] == '#') /* skip cpp command */
175 continue;
176 if (linebuf.base[0] == '\0') /* skip empty line */
177 continue;
179 if (! parse_fn_proto (linebuf.base, linebuf.ptr, &fn_decl))
180 continue;
182 add_hash (fn_decl.fname);
184 fprintf (outf, " {\"%s\", \"%s\", \"%s\"},\n",
185 fn_decl.fname, fn_decl.rtype, fn_decl.params);
187 if (c == EOF)
188 break;
190 fprintf (outf, " {0, 0, 0}\n};\n");
193 fprintf (outf, "#define HASH_SIZE %d\n", HASH_SIZE);
194 fprintf (outf, "short hash_tab[HASH_SIZE] = {\n");
195 for (i = 0; i < HASH_SIZE; i++)
196 fprintf (outf, " %d,\n", hash_tab[i]);
197 fprintf (outf, "};\n");
199 return 0;
202 /* Avoid error if config defines abort as fancy_abort.
203 It's not worth "really" implementing this because ordinary
204 compiler users never run fix-header. */
206 void
207 fancy_abort ()
209 abort ();
212 void
213 fatal (s)
214 char *s;
216 fprintf (stderr, "%s: %s\n", "gen-protos", s);
217 exit (FATAL_EXIT_CODE);