Annotation of src/usr.bin/m4/misc.c, Revision 1.19
1.19 ! espie 1: /* $OpenBSD: misc.c,v 1.18 2000/03/11 15:54:44 espie Exp $ */
1.1 deraadt 2: /* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $ */
3:
4: /*
5: * Copyright (c) 1989, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Ozan Yigit at York University.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: #ifndef lint
41: #if 0
42: static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93";
43: #else
1.19 ! espie 44: static char rcsid[] = "$OpenBSD: misc.c,v 1.18 2000/03/11 15:54:44 espie Exp $";
1.1 deraadt 45: #endif
46: #endif /* not lint */
47:
48: #include <sys/types.h>
49: #include <errno.h>
50: #include <unistd.h>
51: #include <stdio.h>
52: #include <stdlib.h>
1.7 espie 53: #include <stddef.h>
1.1 deraadt 54: #include <string.h>
1.7 espie 55: #include <err.h>
1.1 deraadt 56: #include "mdef.h"
57: #include "stdd.h"
58: #include "extern.h"
59: #include "pathnames.h"
60:
1.9 espie 61:
62: char *ep; /* first free char in strspace */
63: static char *strspace; /* string space for evaluation */
64: static char *endest; /* end of string space */
65: static size_t strsize = STRSPMAX;
66: static size_t bufsize = BUFSIZE;
67:
1.17 espie 68: char *buf; /* push-back buffer */
69: char *bufbase; /* the base for current ilevel */
70: char *bbase[MAXINP]; /* the base for each ilevel */
71: char *bp; /* first available character */
72: static char *endpbb; /* end of push-back buffer */
1.9 espie 73:
74:
1.14 espie 75: static void enlarge_bufspace __P((void));
76: static void enlarge_strspace __P((void));
1.1 deraadt 77: /*
78: * find the index of second str in the first str.
79: */
1.7 espie 80: ptrdiff_t
1.1 deraadt 81: indx(s1, s2)
1.12 espie 82: const char *s1;
83: const char *s2;
1.1 deraadt 84: {
1.12 espie 85: char *t;
1.7 espie 86:
1.12 espie 87: t = strstr(s1, s2);
88: if (t == NULL)
89: return (-1);
1.7 espie 90: else
1.12 espie 91: return (t - s1);
1.1 deraadt 92: }
93: /*
94: * putback - push character back onto input
95: */
96: void
97: putback(c)
1.17 espie 98: int c;
1.1 deraadt 99: {
1.17 espie 100: if (c == EOF)
101: return;
1.9 espie 102: if (bp >= endpbb)
103: enlarge_bufspace();
104: *bp++ = c;
1.1 deraadt 105: }
106:
107: /*
108: * pbstr - push string back onto input
109: * putback is replicated to improve
110: * performance.
111: */
112: void
113: pbstr(s)
1.14 espie 114: const char *s;
1.1 deraadt 115: {
1.9 espie 116: size_t n;
1.1 deraadt 117:
1.9 espie 118: n = strlen(s);
1.12 espie 119: while (endpbb - bp <= n)
1.9 espie 120: enlarge_bufspace();
121: while (n > 0)
122: *bp++ = s[--n];
1.1 deraadt 123: }
124:
125: /*
126: * pbnum - convert number to string, push back on input.
127: */
128: void
129: pbnum(n)
1.12 espie 130: int n;
1.1 deraadt 131: {
1.12 espie 132: int num;
1.1 deraadt 133:
134: num = (n < 0) ? -n : n;
135: do {
136: putback(num % 10 + '0');
137: }
138: while ((num /= 10) > 0);
139:
140: if (n < 0)
141: putback('-');
142: }
143:
1.18 espie 144: /*
145: * pbunsigned - convert unsigned long to string, push back on input.
146: */
147: void
148: pbunsigned(n)
149: unsigned long n;
150: {
151: do {
152: putback(n % 10 + '0');
153: }
154: while ((n /= 10) > 0);
155: }
1.9 espie 156:
157: void
158: initspaces()
159: {
160: int i;
161:
162: strspace = xalloc(strsize+1);
163: ep = strspace;
164: endest = strspace+strsize;
1.17 espie 165: buf = (char *)xalloc(bufsize);
1.9 espie 166: bufbase = buf;
167: bp = buf;
168: endpbb = buf + bufsize;
169: for (i = 0; i < MAXINP; i++)
170: bbase[i] = buf;
171: }
172:
1.17 espie 173: static void
174: enlarge_strspace()
1.9 espie 175: {
176: char *newstrspace;
1.19 ! espie 177: int i;
1.9 espie 178:
179: strsize *= 2;
180: newstrspace = malloc(strsize + 1);
181: if (!newstrspace)
182: errx(1, "string space overflow");
183: memcpy(newstrspace, strspace, strsize/2);
1.19 ! espie 184: for (i = 0; i <= sp; i++)
! 185: if (sstack[i])
! 186: mstack[i].sstr = (mstack[i].sstr - strspace)
! 187: + newstrspace;
1.9 espie 188: ep = (ep-strspace) + newstrspace;
1.19 ! espie 189: free(strspace);
1.9 espie 190: strspace = newstrspace;
191: endest = strspace + strsize;
192: }
193:
1.19 ! espie 194: static void
1.17 espie 195: enlarge_bufspace()
1.9 espie 196: {
1.17 espie 197: char *newbuf;
1.9 espie 198: int i;
199:
200: bufsize *= 2;
1.17 espie 201: newbuf = realloc(buf, bufsize);
1.9 espie 202: if (!newbuf)
203: errx(1, "too many characters pushed back");
204: for (i = 0; i < MAXINP; i++)
205: bbase[i] = (bbase[i]-buf)+newbuf;
206: bp = (bp-buf)+newbuf;
207: bufbase = (bufbase-buf)+newbuf;
208: buf = newbuf;
1.10 espie 209: endpbb = buf+bufsize;
1.9 espie 210: }
211:
1.1 deraadt 212: /*
213: * chrsave - put single char on string space
214: */
215: void
216: chrsave(c)
1.14 espie 217: int c;
1.1 deraadt 218: {
1.9 espie 219: if (ep >= endest)
220: enlarge_strspace();
221: *ep++ = c;
1.1 deraadt 222: }
223:
224: /*
225: * read in a diversion file, and dispose it.
226: */
227: void
228: getdiv(n)
1.12 espie 229: int n;
1.1 deraadt 230: {
1.12 espie 231: int c;
1.1 deraadt 232:
233: if (active == outfile[n])
1.7 espie 234: errx(1, "undivert: diversion still active");
1.8 espie 235: rewind(outfile[n]);
236: while ((c = getc(outfile[n])) != EOF)
237: putc(c, active);
1.1 deraadt 238: (void) fclose(outfile[n]);
1.13 espie 239: outfile[n] = NULL;
1.1 deraadt 240: }
241:
242: void
243: onintr(signo)
244: int signo;
245: {
1.7 espie 246: errx(1, "interrupted.");
1.1 deraadt 247: }
248:
249: /*
250: * killdiv - get rid of the diversion files
251: */
252: void
253: killdiv()
254: {
1.12 espie 255: int n;
1.1 deraadt 256:
257: for (n = 0; n < MAXOUT; n++)
258: if (outfile[n] != NULL) {
259: (void) fclose(outfile[n]);
260: }
261: }
262:
1.18 espie 263: void *
1.1 deraadt 264: xalloc(n)
1.14 espie 265: size_t n;
1.1 deraadt 266: {
1.12 espie 267: char *p = malloc(n);
1.1 deraadt 268:
269: if (p == NULL)
1.7 espie 270: err(1, "malloc");
1.1 deraadt 271: return p;
272: }
273:
274: char *
275: xstrdup(s)
1.12 espie 276: const char *s;
1.1 deraadt 277: {
1.12 espie 278: char *p = strdup(s);
1.1 deraadt 279: if (p == NULL)
1.7 espie 280: err(1, "strdup");
1.1 deraadt 281: return p;
282: }
283:
284: void
285: usage()
286: {
1.11 espie 287: fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname] [-I dirname...]\n");
1.1 deraadt 288: exit(1);
289: }
290:
1.15 espie 291: int
292: obtain_char(f)
293: struct input_file *f;
294: {
1.17 espie 295: if (f->c == EOF)
296: return EOF;
297: else if (f->c == '\n')
1.15 espie 298: f->lineno++;
299:
300: f->c = fgetc(f->file);
301: return f->c;
302: }
303:
304: void
305: set_input(f, real, name)
306: struct input_file *f;
307: FILE *real;
308: const char *name;
309: {
310: f->file = real;
311: f->lineno = 1;
312: f->c = 0;
313: f->name = xstrdup(name);
314: }
315:
316: void
317: release_input(f)
318: struct input_file *f;
319: {
320: if (f->file != stdin)
321: fclose(f->file);
1.17 espie 322: f->c = EOF;
1.16 espie 323: /*
324: * XXX can't free filename, as there might still be
325: * error information pointing to it.
326: */
1.18 espie 327: }
328:
329: void
330: doprintlineno(f)
331: struct input_file *f;
332: {
333: pbunsigned(f->lineno);
334: }
335:
336: void
337: doprintfilename(f)
338: struct input_file *f;
339: {
340: pbstr(f->name);
1.15 espie 341: }
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