Annotation of src/usr.bin/m4/misc.c, Revision 1.6
1.6 ! deraadt 1: /* $OpenBSD: misc.c,v 1.5 1997/07/25 21:05:32 mickey 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
1.6 ! deraadt 44: static char rcsid[] = "$OpenBSD: misc.c,v 1.5 1997/07/25 21:05:32 mickey 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>
53: #include <string.h>
54: #include "mdef.h"
55: #include "stdd.h"
56: #include "extern.h"
57: #include "pathnames.h"
58:
59: /*
60: * find the index of second str in the first str.
61: */
62: int
63: indx(s1, s2)
64: char *s1;
65: char *s2;
66: {
67: register char *t;
68: register char *p;
69: register char *m;
70:
71: for (p = s1; *p; p++) {
72: for (t = p, m = s2; *m && *m == *t; m++, t++);
73: if (!*m)
74: return (p - s1);
75: }
76: return (-1);
77: }
78: /*
79: * putback - push character back onto input
80: */
81: void
82: putback(c)
1.6 ! deraadt 83: pbent c;
1.1 deraadt 84: {
85: if (bp < endpbb)
86: *bp++ = c;
87: else
88: oops("too many characters pushed back");
89: }
90:
91: /*
92: * pbstr - push string back onto input
93: * putback is replicated to improve
94: * performance.
95: */
96: void
97: pbstr(s)
98: register char *s;
99: {
100: register char *es;
1.6 ! deraadt 101: pbent *zp;
1.1 deraadt 102:
103: es = s;
104: zp = bp;
105:
106: while (*es)
107: es++;
108: es--;
109: while (es >= s)
110: if (zp < endpbb)
111: *zp++ = *es--;
112: if ((bp = zp) == endpbb)
113: oops("too many characters pushed back");
114: }
115:
116: /*
117: * pbnum - convert number to string, push back on input.
118: */
119: void
120: pbnum(n)
121: int n;
122: {
123: register int num;
124:
125: num = (n < 0) ? -n : n;
126: do {
127: putback(num % 10 + '0');
128: }
129: while ((num /= 10) > 0);
130:
131: if (n < 0)
132: putback('-');
133: }
134:
135: /*
136: * chrsave - put single char on string space
137: */
138: void
139: chrsave(c)
140: char c;
141: {
142: if (ep < endest)
143: *ep++ = c;
144: else
145: oops("string space overflow");
146: }
147:
148: /*
149: * read in a diversion file, and dispose it.
150: */
151: void
152: getdiv(n)
153: int n;
154: {
155: register int c;
156: register FILE *dfil;
157:
158: if (active == outfile[n])
159: oops("%s: diversion still active.", "undivert");
160: (void) fclose(outfile[n]);
161: outfile[n] = NULL;
162: m4temp[UNIQUE] = n + '0';
1.4 deraadt 163: if ((dfil = fopen(m4temp, "r")) == NULL)
1.1 deraadt 164: oops("%s: cannot undivert.", m4temp);
1.4 deraadt 165: else
1.1 deraadt 166: while ((c = getc(dfil)) != EOF)
167: putc(c, active);
168: (void) fclose(dfil);
169:
170: #ifdef vms
171: if (remove(m4temp))
172: #else
173: if (unlink(m4temp) == -1)
174: #endif
175: oops("%s: cannot unlink.", m4temp);
176: }
177:
178: void
179: onintr(signo)
180: int signo;
181: {
182: oops("interrupted.");
183: }
184:
185: /*
186: * killdiv - get rid of the diversion files
187: */
188: void
189: killdiv()
190: {
191: register int n;
192:
193: for (n = 0; n < MAXOUT; n++)
194: if (outfile[n] != NULL) {
195: (void) fclose(outfile[n]);
196: m4temp[UNIQUE] = n + '0';
197: #ifdef vms
198: (void) remove(m4temp);
199: #else
200: (void) unlink(m4temp);
201: #endif
202: }
203: }
204:
205: char *
206: xalloc(n)
207: unsigned long n;
208: {
209: register char *p = malloc(n);
210:
211: if (p == NULL)
212: oops("malloc: %s", strerror(errno));
213: return p;
214: }
215:
216: char *
217: xstrdup(s)
218: const char *s;
219: {
220: register char *p = strdup(s);
221: if (p == NULL)
222: oops("strdup: %s", strerror(errno));
223: return p;
224: }
225:
226: char *
227: basename(s)
228: register char *s;
229: {
230: register char *p;
231: extern char *strrchr();
232:
233: if ((p = strrchr(s, '/')) == NULL)
234: return s;
235:
236: return ++p;
237: }
238:
239: void
240: usage()
241: {
242: fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n");
243: exit(1);
244: }
245:
1.5 mickey 246: #ifdef __STDC__
1.1 deraadt 247: #include <stdarg.h>
248: #else
249: #include <varargs.h>
250: #endif
251:
252: void
1.5 mickey 253: #ifdef __STDC__
1.1 deraadt 254: oops(const char *fmt, ...)
255: #else
256: oops(fmt, va_alist)
257: char *fmt;
258: va_dcl
259: #endif
260: {
261: va_list ap;
1.5 mickey 262: #ifdef __STDC__
1.1 deraadt 263: va_start(ap, fmt);
264: #else
265: va_start(ap);
266: #endif
267: (void)fprintf(stderr, "%s: ", progname);
268: (void)vfprintf(stderr, fmt, ap);
269: va_end(ap);
270: (void)fprintf(stderr, "\n");
271: exit(1);
272: /* NOTREACHED */
273: }
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