main.c revision 1.21
1 /* $NetBSD: main.c,v 1.21 2010/02/19 16:35:27 tnn Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 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 * Diomidis Spinellis of Imperial College, University of London. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /*- 36 * Copyright (c) 1992 Diomidis Spinellis. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Diomidis Spinellis of Imperial College, University of London. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the University of 52 * California, Berkeley and its contributors. 53 * 4. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70 #if HAVE_NBTOOL_CONFIG_H 71 #include "nbtool_config.h" 72 #endif 73 74 #include <sys/cdefs.h> 75 #ifndef lint 76 __COPYRIGHT("@(#) Copyright (c) 1992, 1993\ 77 The Regents of the University of California. All rights reserved."); 78 #endif /* not lint */ 79 80 #ifndef lint 81 #if 0 82 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 83 #else 84 __RCSID("$NetBSD: main.c,v 1.21 2010/02/19 16:35:27 tnn Exp $"); 85 #endif 86 #endif /* not lint */ 87 88 #include <sys/types.h> 89 90 #include <ctype.h> 91 #include <errno.h> 92 #include <fcntl.h> 93 #include <limits.h> 94 #include <regex.h> 95 #include <stddef.h> 96 #include <stdio.h> 97 #include <stdlib.h> 98 #include <string.h> 99 #include <unistd.h> 100 101 #include "defs.h" 102 #include "extern.h" 103 104 /* 105 * Linked list of units (strings and files) to be compiled 106 */ 107 struct s_compunit { 108 struct s_compunit *next; 109 enum e_cut {CU_FILE, CU_STRING} type; 110 char *s; /* Pointer to string or fname */ 111 }; 112 113 /* 114 * Linked list pointer to compilation units and pointer to current 115 * next pointer. 116 */ 117 static struct s_compunit *script, **cu_nextp = &script; 118 119 /* 120 * Linked list of files to be processed 121 */ 122 struct s_flist { 123 char *fname; 124 struct s_flist *next; 125 }; 126 127 /* 128 * Linked list pointer to files and pointer to current 129 * next pointer. 130 */ 131 static struct s_flist *files, **fl_nextp = &files; 132 133 int aflag, eflag, nflag, ere; 134 135 /* 136 * Current file and line number; line numbers restart across compilation 137 * units, but span across input files. 138 */ 139 const char *fname; /* File name. */ 140 u_long linenum; 141 int lastline; /* TRUE on the last line of the last file */ 142 143 static void add_compunit(enum e_cut, char *); 144 static void add_file(char *); 145 int main(int, char **); 146 147 int 148 main(int argc, char *argv[]) 149 { 150 int c, fflag; 151 152 setprogname(*argv); 153 fflag = 0; 154 while ((c = getopt(argc, argv, "ae:f:nrE")) != -1) 155 switch (c) { 156 case 'a': 157 aflag = 1; 158 break; 159 case 'e': 160 eflag = 1; 161 add_compunit(CU_STRING, optarg); 162 break; 163 case 'f': 164 fflag = 1; 165 add_compunit(CU_FILE, optarg); 166 break; 167 case 'n': 168 nflag = 1; 169 break; 170 case 'r': 171 case 'E': 172 ere = REG_EXTENDED; 173 break; 174 default: 175 case '?': 176 (void)fprintf(stderr, 177 "usage:\t%s [-aEnr] script [file ...]\n\t%s [-aEnr] [-e script] ... [-f script_file] ... [file ...]\n", 178 getprogname(), getprogname()); 179 exit(1); 180 } 181 argc -= optind; 182 argv += optind; 183 184 /* First usage case; script is the first arg */ 185 if (!eflag && !fflag && *argv) { 186 add_compunit(CU_STRING, *argv); 187 argv++; 188 } 189 190 compile(); 191 192 /* Continue with first and start second usage */ 193 if (*argv) 194 for (; *argv; argv++) 195 add_file(*argv); 196 else 197 add_file(NULL); 198 process(); 199 cfclose(prog, NULL); 200 if (fclose(stdout)) 201 err(FATAL, "stdout: %s", strerror(errno)); 202 exit (0); 203 } 204 205 /* 206 * Like fgets, but go through the chain of compilation units chaining them 207 * together. Empty strings and files are ignored. 208 */ 209 char * 210 cu_fgets(char **outbuf, size_t *outsize) 211 { 212 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 213 static FILE *f; /* Current open file */ 214 static char *s; /* Current pointer inside string */ 215 static char string_ident[30]; 216 size_t len; 217 char *p; 218 219 if (*outbuf == NULL) 220 *outsize = 0; 221 222 again: 223 switch (state) { 224 case ST_EOF: 225 if (script == NULL) 226 return (NULL); 227 linenum = 0; 228 switch (script->type) { 229 case CU_FILE: 230 if ((f = fopen(script->s, "r")) == NULL) 231 err(FATAL, 232 "%s: %s", script->s, strerror(errno)); 233 fname = script->s; 234 state = ST_FILE; 235 goto again; 236 case CU_STRING: 237 if ((snprintf(string_ident, 238 sizeof(string_ident), "\"%s\"", script->s)) >= 239 (int)(sizeof(string_ident) - 1)) 240 (void)strcpy(string_ident + 241 sizeof(string_ident) - 6, " ...\""); 242 fname = string_ident; 243 s = script->s; 244 state = ST_STRING; 245 goto again; 246 } 247 case ST_FILE: 248 if ((p = fgetln(f, &len)) != NULL) { 249 linenum++; 250 if (len >= *outsize) { 251 free(*outbuf); 252 *outsize = ROUNDLEN(len + 1); 253 *outbuf = xmalloc(*outsize); 254 } 255 memcpy(*outbuf, p, len); 256 (*outbuf)[len] = '\0'; 257 if (linenum == 1 && p[0] == '#' && p[1] == 'n') 258 nflag = 1; 259 return (*outbuf); 260 } 261 script = script->next; 262 (void)fclose(f); 263 state = ST_EOF; 264 goto again; 265 case ST_STRING: 266 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 267 nflag = 1; 268 p = *outbuf; 269 len = *outsize; 270 for (;;) { 271 if (len <= 1) { 272 *outbuf = xrealloc(*outbuf, 273 *outsize + _POSIX2_LINE_MAX); 274 p = *outbuf + *outsize - len; 275 len += _POSIX2_LINE_MAX; 276 *outsize += _POSIX2_LINE_MAX; 277 } 278 switch (*s) { 279 case '\0': 280 state = ST_EOF; 281 if (s == script->s) { 282 script = script->next; 283 goto again; 284 } else { 285 script = script->next; 286 *p = '\0'; 287 linenum++; 288 return (*outbuf); 289 } 290 case '\n': 291 *p++ = '\n'; 292 *p = '\0'; 293 s++; 294 linenum++; 295 return (*outbuf); 296 default: 297 *p++ = *s++; 298 len--; 299 } 300 } 301 } 302 /* NOTREACHED */ 303 return (NULL); 304 } 305 306 /* 307 * Like fgets, but go through the list of files chaining them together. 308 * Set len to the length of the line. 309 */ 310 int 311 mf_fgets(SPACE *sp, enum e_spflag spflag) 312 { 313 static FILE *f; /* Current open file */ 314 size_t len; 315 char *p; 316 int c; 317 318 if (f == NULL) 319 /* Advance to first non-empty file */ 320 for (;;) { 321 if (files == NULL) { 322 lastline = 1; 323 return (0); 324 } 325 if (files->fname == NULL) { 326 f = stdin; 327 fname = "stdin"; 328 } else { 329 fname = files->fname; 330 if ((f = fopen(fname, "r")) == NULL) 331 err(FATAL, "%s: %s", 332 fname, strerror(errno)); 333 } 334 if ((c = getc(f)) != EOF) { 335 (void)ungetc(c, f); 336 break; 337 } 338 (void)fclose(f); 339 files = files->next; 340 } 341 342 if (lastline) { 343 sp->len = 0; 344 return (0); 345 } 346 347 /* 348 * Use fgetln so that we can handle essentially infinite input data. 349 * Can't use the pointer into the stdio buffer as the process space 350 * because the ungetc() can cause it to move. 351 */ 352 p = fgetln(f, &len); 353 if (ferror(f)) 354 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 355 cspace(sp, p, len, spflag); 356 357 linenum++; 358 /* Advance to next non-empty file */ 359 while ((c = getc(f)) == EOF) { 360 (void)fclose(f); 361 files = files->next; 362 if (files == NULL) { 363 lastline = 1; 364 return (1); 365 } 366 if (files->fname == NULL) { 367 f = stdin; 368 fname = "stdin"; 369 } else { 370 fname = files->fname; 371 if ((f = fopen(fname, "r")) == NULL) 372 err(FATAL, "%s: %s", fname, strerror(errno)); 373 } 374 } 375 (void)ungetc(c, f); 376 return (1); 377 } 378 379 /* 380 * Add a compilation unit to the linked list 381 */ 382 static void 383 add_compunit(enum e_cut type, char *s) 384 { 385 struct s_compunit *cu; 386 387 cu = xmalloc(sizeof(struct s_compunit)); 388 cu->type = type; 389 cu->s = s; 390 cu->next = NULL; 391 *cu_nextp = cu; 392 cu_nextp = &cu->next; 393 } 394 395 /* 396 * Add a file to the linked list 397 */ 398 static void 399 add_file(char *s) 400 { 401 struct s_flist *fp; 402 403 fp = xmalloc(sizeof(struct s_flist)); 404 fp->next = NULL; 405 *fl_nextp = fp; 406 fp->fname = s; 407 fl_nextp = &fp->next; 408 } 409
Indexes created Tue Sep 23 07:09:52 GMT 2025