1 /* $OpenBSD: misc.c,v 1.41 2009/10/14 17:19:47 sthen Exp $ */ 2 /* $NetBSD: misc.c,v 1.20 2009/11/06 15:13:27 joerg 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 #if HAVE_NBTOOL_CONFIG_H 36 #include "nbtool_config.h" 37 #endif 38 #include <sys/cdefs.h> 39 __RCSID("$NetBSD: misc.c,v 1.20 2009/11/06 15:13:27 joerg Exp $"); 40 #include <sys/types.h> 41 #include <errno.h> 42 #include <unistd.h> 43 #include <stdarg.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <stddef.h> 47 #include <string.h> 48 #include <err.h> 49 #include "mdef.h" 50 #include "stdd.h" 51 #include "extern.h" 52 #include "pathnames.h" 53 54 55 char *ep; /* first free char in strspace */ 56 static char *strspace; /* string space for evaluation */ 57 char *endest; /* end of string space */ 58 static size_t strsize = STRSPMAX; 59 static size_t bufsize = BUFSIZE; 60 61 unsigned char *buf; /* push-back buffer */ 62 unsigned char *bufbase; /* the base for current ilevel */ 63 unsigned char *bbase[MAXINP]; /* the base for each ilevel */ 64 unsigned char *bp; /* first available character */ 65 unsigned char *endpbb; /* end of push-back buffer */ 66 67 68 /* 69 * find the index of second str in the first str. 70 */ 71 ptrdiff_t 72 indx(const char *s1, const char *s2) 73 { 74 char *t; 75 76 t = strstr(s1, s2); 77 if (t == NULL) 78 return (-1); 79 else 80 return (t - s1); 81 } 82 /* 83 * pushback - push character back onto input 84 */ 85 void 86 pushback(int c) 87 { 88 if (c == EOF) 89 return; 90 if (bp >= endpbb) 91 enlarge_bufspace(); 92 *bp++ = c; 93 } 94 95 /* 96 * pbstr - push string back onto input 97 * pushback is replicated to improve 98 * performance. 99 */ 100 void 101 pbstr(const char *s) 102 { 103 size_t n; 104 105 n = strlen(s); 106 while ((size_t)(endpbb - bp) <= n) 107 enlarge_bufspace(); 108 while (n > 0) 109 *bp++ = s[--n]; 110 } 111 112 /* 113 * pbnum - convert number to string, push back on input. 114 */ 115 void 116 pbnum(int n) 117 { 118 pbnumbase(n, 10, 0); 119 } 120 121 void 122 pbnumbase(int n, int base, int d) 123 { 124 static char digits[36] = "0123456789abcdefghijklmnopqrstuvwxyz"; 125 int num; 126 int printed = 0; 127 128 if (base > 36) 129 m4errx(1, "base %d > 36: not supported.", base); 130 131 if (base < 2) 132 m4errx(1, "bad base %d for conversion.", base); 133 134 num = (n < 0) ? -n : n; 135 do { 136 pushback(digits[num % base]); 137 printed++; 138 } 139 while ((num /= base) > 0); 140 141 if (n < 0) 142 printed++; 143 while (printed++ < d) 144 pushback('0'); 145 146 if (n < 0) 147 pushback('-'); 148 } 149 150 /* 151 * pbunsigned - convert unsigned long to string, push back on input. 152 */ 153 void 154 pbunsigned(unsigned long n) 155 { 156 do { 157 pushback(n % 10 + '0'); 158 } 159 while ((n /= 10) > 0); 160 } 161 162 void 163 initspaces() 164 { 165 int i; 166 167 strspace = xalloc(strsize+1, NULL); 168 ep = strspace; 169 endest = strspace+strsize; 170 buf = (unsigned char *)xalloc(bufsize, NULL); 171 bufbase = buf; 172 bp = buf; 173 endpbb = buf + bufsize; 174 for (i = 0; i < MAXINP; i++) 175 bbase[i] = buf; 176 } 177 178 void 179 enlarge_strspace() 180 { 181 char *newstrspace; 182 int i; 183 184 strsize *= 2; 185 newstrspace = malloc(strsize + 1); 186 if (!newstrspace) 187 errx(1, "string space overflow"); 188 memcpy(newstrspace, strspace, strsize/2); 189 for (i = 0; i <= sp; i++) 190 if (sstack[i]) 191 mstack[i].sstr = (mstack[i].sstr - strspace) 192 + newstrspace; 193 ep = (ep-strspace) + newstrspace; 194 free(strspace); 195 strspace = newstrspace; 196 endest = strspace + strsize; 197 } 198 199 void 200 enlarge_bufspace() 201 { 202 unsigned char *newbuf; 203 int i; 204 205 bufsize += bufsize/2; 206 newbuf = xrealloc(buf, bufsize, "too many characters pushed back"); 207 for (i = 0; i < MAXINP; i++) 208 bbase[i] = (bbase[i]-buf)+newbuf; 209 bp = (bp-buf)+newbuf; 210 bufbase = (bufbase-buf)+newbuf; 211 buf = newbuf; 212 endpbb = buf+bufsize; 213 } 214 215 /* 216 * chrsave - put single char on string space 217 */ 218 void 219 chrsave(int c) 220 { 221 if (ep >= endest) 222 enlarge_strspace(); 223 *ep++ = c; 224 } 225 226 /* 227 * read in a diversion file, and dispose it. 228 */ 229 void 230 getdiv(int n) 231 { 232 int c; 233 234 if (active == outfile[n]) 235 m4errx(1, "undivert: diversion still active."); 236 rewind(outfile[n]); 237 while ((c = getc(outfile[n])) != EOF) 238 putc(c, active); 239 (void) fclose(outfile[n]); 240 outfile[n] = NULL; 241 } 242 243 void 244 onintr(int signo) 245 { 246 #define intrmessage "m4: interrupted.\n" 247 write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1); 248 _exit(1); 249 } 250 251 /* 252 * killdiv - get rid of the diversion files 253 */ 254 void 255 killdiv() 256 { 257 int n; 258 259 for (n = 0; n < maxout; n++) 260 if (outfile[n] != NULL) { 261 (void) fclose(outfile[n]); 262 } 263 } 264 265 void 266 m4errx(int exval, const char *fmt, ...) 267 { 268 fprintf(stderr, "%s: ", getprogname()); 269 fprintf(stderr, "%s at line %lu: ", CURRENT_NAME, CURRENT_LINE); 270 if (fmt != NULL) { 271 va_list ap; 272 273 va_start(ap, fmt); 274 vfprintf(stderr, fmt, ap); 275 va_end(ap); 276 } 277 fprintf(stderr, "\n"); 278 exit(exval); 279 } 280 281 /* 282 * resizedivs: allocate more diversion files */ 283 void 284 resizedivs(int n) 285 { 286 int i; 287 288 outfile = (FILE **)xrealloc(outfile, sizeof(FILE *) * n, 289 "too many diverts %d", n); 290 for (i = maxout; i < n; i++) 291 outfile[i] = NULL; 292 maxout = n; 293 } 294 295 void * 296 xalloc(size_t n, const char *fmt, ...) 297 { 298 void *p = malloc(n); 299 300 if (p == NULL) { 301 if (fmt == NULL) 302 err(1, "malloc"); 303 else { 304 va_list va; 305 306 va_start(va, fmt); 307 verr(1, fmt, va); 308 va_end(va); 309 } 310 } 311 return p; 312 } 313 314 void * 315 xrealloc(void *old, size_t n, const char *fmt, ...) 316 { 317 char *p = realloc(old, n); 318 319 if (p == NULL) { 320 free(old); 321 if (fmt == NULL) 322 err(1, "realloc"); 323 else { 324 va_list va; 325 326 va_start(va, fmt); 327 verr(1, fmt, va); 328 va_end(va); 329 } 330 } 331 return p; 332 } 333 334 char * 335 xstrdup(const char *s) 336 { 337 char *p = strdup(s); 338 if (p == NULL) 339 err(1, "strdup"); 340 return p; 341 } 342 343 void 344 usage(void) 345 { 346 fprintf(stderr, "usage: %s [-gPs] [-Dname[=value]] [-d flags] " 347 "[-I dirname] [-o filename]\n" 348 "\t[-t macro] [-Uname] [file ...]\n", getprogname()); 349 exit(1); 350 } 351 352 int 353 obtain_char(struct input_file *f) 354 { 355 if (f->c == EOF) 356 return EOF; 357 358 f->c = fgetc(f->file); 359 if (f->c == '\n') 360 f->lineno++; 361 362 return f->c; 363 } 364 365 void 366 set_input(struct input_file *f, FILE *real, const char *name) 367 { 368 f->file = real; 369 f->lineno = 1; 370 f->c = 0; 371 f->name = xstrdup(name); 372 emit_synchline(); 373 } 374 375 void 376 do_emit_synchline() 377 { 378 fprintf(active, "#line %lu \"%s\"\n", 379 infile[ilevel].lineno, infile[ilevel].name); 380 infile[ilevel].synch_lineno = infile[ilevel].lineno; 381 } 382 383 void 384 release_input(struct input_file *f) 385 { 386 if (f->file != stdin) 387 fclose(f->file); 388 f->c = EOF; 389 /* 390 * XXX can't free filename, as there might still be 391 * error information pointing to it. 392 */ 393 } 394 395 void 396 doprintlineno(struct input_file *f) 397 { 398 pbunsigned(f->lineno); 399 } 400 401 void 402 doprintfilename(struct input_file *f) 403 { 404 pbstr(rquote); 405 pbstr(f->name); 406 pbstr(lquote); 407 } 408 409 /* 410 * buffer_mark/dump_buffer: allows one to save a mark in a buffer, 411 * and later dump everything that was added since then to a file. 412 */ 413 size_t 414 buffer_mark() 415 { 416 return bp - buf; 417 } 418 419 420 void 421 dump_buffer(FILE *f, size_t m) 422 { 423 unsigned char *s; 424 425 for (s = bp; (size_t)(s - buf) > m;) 426 fputc(*--s, f); 427 } 428