Annotation of src/usr.bin/m4/misc.c, Revision 1.8
1.7 espie 1: /* $OpenBSD: misc.c,v 1.6 1997/12/10 20:24:17 deraadt 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
1.7 espie 44: static char rcsid[] = "$OpenBSD: misc.c,v 1.6 1997/12/10 20:24:17 deraadt 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:
61: /*
62: * find the index of second str in the first str.
63: */
1.7 espie 64: ptrdiff_t
1.1 deraadt 65: indx(s1, s2)
1.7 espie 66: const char *s1;
67: const char *s2;
1.1 deraadt 68: {
1.7 espie 69: char *r;
70:
71: r = strstr(s1, s2);
72: if (r)
73: return (r - s1);
74: else
75: return (-1);
1.1 deraadt 76: }
77: /*
78: * putback - push character back onto input
79: */
80: void
81: putback(c)
1.6 deraadt 82: pbent c;
1.1 deraadt 83: {
84: if (bp < endpbb)
85: *bp++ = c;
86: else
1.7 espie 87: errx(1, "too many characters pushed back");
1.1 deraadt 88: }
89:
90: /*
91: * pbstr - push string back onto input
92: * putback is replicated to improve
93: * performance.
94: */
95: void
96: pbstr(s)
97: register char *s;
98: {
99: register char *es;
1.6 deraadt 100: pbent *zp;
1.1 deraadt 101:
102: es = s;
103: zp = bp;
104:
105: while (*es)
106: es++;
107: es--;
108: while (es >= s)
109: if (zp < endpbb)
110: *zp++ = *es--;
111: if ((bp = zp) == endpbb)
1.7 espie 112: errx(1, "too many characters pushed back");
1.1 deraadt 113: }
114:
115: /*
116: * pbnum - convert number to string, push back on input.
117: */
118: void
119: pbnum(n)
120: int n;
121: {
122: register int num;
123:
124: num = (n < 0) ? -n : n;
125: do {
126: putback(num % 10 + '0');
127: }
128: while ((num /= 10) > 0);
129:
130: if (n < 0)
131: putback('-');
132: }
133:
134: /*
135: * chrsave - put single char on string space
136: */
137: void
138: chrsave(c)
139: char c;
140: {
141: if (ep < endest)
142: *ep++ = c;
143: else
1.7 espie 144: errx(1, "string space overflow");
1.1 deraadt 145: }
146:
147: /*
148: * read in a diversion file, and dispose it.
149: */
150: void
151: getdiv(n)
152: int n;
153: {
154: register int c;
155:
156: if (active == outfile[n])
1.7 espie 157: errx(1, "undivert: diversion still active");
1.8 ! espie 158: rewind(outfile[n]);
! 159: while ((c = getc(outfile[n])) != EOF)
! 160: putc(c, active);
1.1 deraadt 161: (void) fclose(outfile[n]);
162: }
163:
164: void
165: onintr(signo)
166: int signo;
167: {
1.7 espie 168: errx(1, "interrupted.");
1.1 deraadt 169: }
170:
171: /*
172: * killdiv - get rid of the diversion files
173: */
174: void
175: killdiv()
176: {
177: register int n;
178:
179: for (n = 0; n < MAXOUT; n++)
180: if (outfile[n] != NULL) {
181: (void) fclose(outfile[n]);
182: }
183: }
184:
185: char *
186: xalloc(n)
187: unsigned long n;
188: {
189: register char *p = malloc(n);
190:
191: if (p == NULL)
1.7 espie 192: err(1, "malloc");
1.1 deraadt 193: return p;
194: }
195:
196: char *
197: xstrdup(s)
198: const char *s;
199: {
200: register char *p = strdup(s);
201: if (p == NULL)
1.7 espie 202: err(1, "strdup");
1.1 deraadt 203: return p;
204: }
205:
206: void
207: usage()
208: {
209: fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n");
210: exit(1);
211: }
212:
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