1 /* $NetBSD: misc.c,v 1.9 1997/12/29 19:52:57 cgd 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 #include <sys/cdefs.h> 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93"; 43 #else 44 __RCSID("$NetBSD: misc.c,v 1.9 1997/12/29 19:52:57 cgd Exp $"); 45 #endif 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <unistd.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include "mdef.h" 56 #include "stdd.h" 57 #include "extern.h" 58 #include "pathnames.h" 59 60 /* 61 * find the index of second str in the first str. 62 */ 63 int 64 indx(s1, s2) 65 char *s1; 66 char *s2; 67 { 68 char *t; 69 70 t = strstr(s1, s2); 71 if (t == NULL) 72 return (-1); 73 return (t - s1); 74 } 75 76 /* 77 * putback - push character back onto input 78 */ 79 void 80 putback(c) 81 unsigned char c; 82 { 83 if (bp < endpbb) 84 *bp++ = c; 85 else 86 errx(1, "too many characters pushed back"); 87 } 88 89 /* 90 * putbackeof - push EOF back onto input 91 */ 92 void 93 putbackeof() 94 { 95 if (bp < endpbb) 96 *bp++ = EOF; 97 else 98 errx(1, "too many characters pushed back"); 99 } 100 101 /* 102 * pbstr - push string back onto input 103 * putback is replicated to improve 104 * performance. 105 */ 106 void 107 pbstr(s) 108 char *s; 109 { 110 char *es; 111 pbent *zp; 112 113 es = s; 114 zp = bp; 115 116 while (*es) 117 es++; 118 es--; 119 while (es >= s) 120 if (zp < endpbb) 121 *zp++ = (unsigned char)*es--; 122 if ((bp = zp) == endpbb) 123 errx(1, "too many characters pushed back"); 124 } 125 126 /* 127 * pbnum - convert number to string, push back on input. 128 */ 129 void 130 pbnum(n) 131 int n; 132 { 133 int num; 134 135 num = (n < 0) ? -n : n; 136 do { 137 putback(num % 10 + '0'); 138 } 139 while ((num /= 10) > 0); 140 141 if (n < 0) 142 putback('-'); 143 } 144 145 /* 146 * chrsave - put single char on string space 147 */ 148 void 149 chrsave(c) 150 char c; 151 { 152 if (ep < endest) 153 *ep++ = c; 154 else 155 errx(1, "string space overflow"); 156 } 157 158 /* 159 * read in a diversion file, and dispose it. 160 */ 161 void 162 getdiv(n) 163 int n; 164 { 165 int c; 166 FILE *dfil; 167 168 if (active == outfile[n]) 169 errx(1, "undivert: diversion still active"); 170 (void) fclose(outfile[n]); 171 outfile[n] = NULL; 172 m4temp[UNIQUE] = n + '0'; 173 if ((dfil = fopen(m4temp, "r")) == NULL) 174 err(1, "%s: cannot undivert", m4temp); 175 else 176 while ((c = getc(dfil)) != EOF) 177 putc(c, active); 178 (void) fclose(dfil); 179 180 #ifdef vms 181 if (remove(m4temp)) 182 #else 183 if (unlink(m4temp) == -1) 184 #endif 185 err(1, "%s: cannot unlink", m4temp); 186 } 187 188 void 189 onintr(signo) 190 int signo; 191 { 192 errx(1, "interrupted"); 193 } 194 195 /* 196 * killdiv - get rid of the diversion files 197 */ 198 void 199 killdiv() 200 { 201 int n; 202 203 for (n = 0; n < MAXOUT; n++) 204 if (outfile[n] != NULL) { 205 (void) fclose(outfile[n]); 206 m4temp[UNIQUE] = n + '0'; 207 #ifdef vms 208 (void) remove(m4temp); 209 #else 210 (void) unlink(m4temp); 211 #endif 212 } 213 } 214 215 char * 216 xalloc(n) 217 unsigned long n; 218 { 219 char *p = malloc(n); 220 221 if (p == NULL) 222 err(1, "malloc"); 223 return p; 224 } 225 226 char * 227 xstrdup(s) 228 const char *s; 229 { 230 char *p = strdup(s); 231 if (p == NULL) 232 err(1, "strdup"); 233 return p; 234 } 235 236 char * 237 basename(s) 238 char *s; 239 { 240 char *p; 241 242 if ((p = strrchr(s, '/')) == NULL) 243 return s; 244 245 return ++p; 246 } 247 248 void 249 usage() 250 { 251 fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n"); 252 exit(1); 253 } 254