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1.1 deraadt 1: /* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $ */
2:
3: /*
4: * Copyright (c) 1989, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Ozan Yigit at York University.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93";
42: #else
43: static char rcsid[] = "$NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $";
44: #endif
45: #endif /* not lint */
46:
47: #include <sys/types.h>
48: #include <errno.h>
49: #include <unistd.h>
50: #include <stdio.h>
51: #include <stdlib.h>
52: #include <string.h>
53: #include "mdef.h"
54: #include "stdd.h"
55: #include "extern.h"
56: #include "pathnames.h"
57:
58: /*
59: * find the index of second str in the first str.
60: */
61: int
62: indx(s1, s2)
63: char *s1;
64: char *s2;
65: {
66: register char *t;
67: register char *p;
68: register char *m;
69:
70: for (p = s1; *p; p++) {
71: for (t = p, m = s2; *m && *m == *t; m++, t++);
72: if (!*m)
73: return (p - s1);
74: }
75: return (-1);
76: }
77: /*
78: * putback - push character back onto input
79: */
80: void
81: putback(c)
82: char c;
83: {
84: if (bp < endpbb)
85: *bp++ = c;
86: else
87: oops("too many characters pushed back");
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;
100: register char *zp;
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)
112: oops("too many characters pushed back");
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
144: oops("string space overflow");
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: register FILE *dfil;
156:
157: if (active == outfile[n])
158: oops("%s: diversion still active.", "undivert");
159: (void) fclose(outfile[n]);
160: outfile[n] = NULL;
161: m4temp[UNIQUE] = n + '0';
162: if ((dfil = fopen(m4temp, "r")) == NULL)
163: oops("%s: cannot undivert.", m4temp);
164: else
165: while ((c = getc(dfil)) != EOF)
166: putc(c, active);
167: (void) fclose(dfil);
168:
169: #ifdef vms
170: if (remove(m4temp))
171: #else
172: if (unlink(m4temp) == -1)
173: #endif
174: oops("%s: cannot unlink.", m4temp);
175: }
176:
177: void
178: onintr(signo)
179: int signo;
180: {
181: oops("interrupted.");
182: }
183:
184: /*
185: * killdiv - get rid of the diversion files
186: */
187: void
188: killdiv()
189: {
190: register int n;
191:
192: for (n = 0; n < MAXOUT; n++)
193: if (outfile[n] != NULL) {
194: (void) fclose(outfile[n]);
195: m4temp[UNIQUE] = n + '0';
196: #ifdef vms
197: (void) remove(m4temp);
198: #else
199: (void) unlink(m4temp);
200: #endif
201: }
202: }
203:
204: char *
205: xalloc(n)
206: unsigned long n;
207: {
208: register char *p = malloc(n);
209:
210: if (p == NULL)
211: oops("malloc: %s", strerror(errno));
212: return p;
213: }
214:
215: char *
216: xstrdup(s)
217: const char *s;
218: {
219: register char *p = strdup(s);
220: if (p == NULL)
221: oops("strdup: %s", strerror(errno));
222: return p;
223: }
224:
225: char *
226: basename(s)
227: register char *s;
228: {
229: register char *p;
230: extern char *strrchr();
231:
232: if ((p = strrchr(s, '/')) == NULL)
233: return s;
234:
235: return ++p;
236: }
237:
238: void
239: usage()
240: {
241: fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n");
242: exit(1);
243: }
244:
245: #if __STDC__
246: #include <stdarg.h>
247: #else
248: #include <varargs.h>
249: #endif
250:
251: void
252: #if __STDC__
253: oops(const char *fmt, ...)
254: #else
255: oops(fmt, va_alist)
256: char *fmt;
257: va_dcl
258: #endif
259: {
260: va_list ap;
261: #if __STDC__
262: va_start(ap, fmt);
263: #else
264: va_start(ap);
265: #endif
266: (void)fprintf(stderr, "%s: ", progname);
267: (void)vfprintf(stderr, fmt, ap);
268: va_end(ap);
269: (void)fprintf(stderr, "\n");
270: exit(1);
271: /* NOTREACHED */
272: }