main.c revision 1.15
1 /* $NetBSD: main.c,v 1.15 2003/10/16 12:11:12 grant 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 #include <sys/cdefs.h> 71 #ifndef lint 72 __COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\ 73 The Regents of the University of California. All rights reserved.\n"); 74 #endif /* not lint */ 75 76 #ifndef lint 77 #if 0 78 static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 79 #else 80 __RCSID("$NetBSD: main.c,v 1.15 2003/10/16 12:11:12 grant Exp $"); 81 #endif 82 #endif /* not lint */ 83 84 #include <sys/types.h> 85 86 #include <ctype.h> 87 #include <errno.h> 88 #include <fcntl.h> 89 #include <regex.h> 90 #include <stddef.h> 91 #include <stdio.h> 92 #include <stdlib.h> 93 #include <string.h> 94 #include <unistd.h> 95 96 #include "defs.h" 97 #include "extern.h" 98 99 /* 100 * Linked list of units (strings and files) to be compiled 101 */ 102 struct s_compunit { 103 struct s_compunit *next; 104 enum e_cut {CU_FILE, CU_STRING} type; 105 char *s; /* Pointer to string or fname */ 106 }; 107 108 /* 109 * Linked list pointer to compilation units and pointer to current 110 * next pointer. 111 */ 112 static struct s_compunit *script, **cu_nextp = &script; 113 114 /* 115 * Linked list of files to be processed 116 */ 117 struct s_flist { 118 char *fname; 119 struct s_flist *next; 120 }; 121 122 /* 123 * Linked list pointer to files and pointer to current 124 * next pointer. 125 */ 126 static struct s_flist *files, **fl_nextp = &files; 127 128 int aflag, eflag, nflag, ere; 129 130 /* 131 * Current file and line number; line numbers restart across compilation 132 * units, but span across input files. 133 */ 134 char *fname; /* File name. */ 135 u_long linenum; 136 int lastline; /* TRUE on the last line of the last file */ 137 138 static void add_compunit(enum e_cut, char *); 139 static void add_file(char *); 140 int main(int, char **); 141 142 int 143 main(int argc, char *argv[]) 144 { 145 int c, fflag; 146 147 setprogname(*argv); 148 fflag = 0; 149 while ((c = getopt(argc, argv, "ae:f:nE")) != -1) 150 switch (c) { 151 case 'a': 152 aflag = 1; 153 break; 154 case 'e': 155 eflag = 1; 156 add_compunit(CU_STRING, optarg); 157 break; 158 case 'f': 159 fflag = 1; 160 add_compunit(CU_FILE, optarg); 161 break; 162 case 'n': 163 nflag = 1; 164 break; 165 case 'E': 166 ere = REG_EXTENDED; 167 break; 168 default: 169 case '?': 170 (void)fprintf(stderr, 171 "usage:\t%s script [-anE] [file ...]\n\t%s [-an] [-e script] ... [-f script_file] ... [file ...]\n", 172 getprogname(), getprogname()); 173 exit(1); 174 } 175 argc -= optind; 176 argv += optind; 177 178 /* First usage case; script is the first arg */ 179 if (!eflag && !fflag && *argv) { 180 add_compunit(CU_STRING, *argv); 181 argv++; 182 } 183 184 compile(); 185 186 /* Continue with first and start second usage */ 187 if (*argv) 188 for (; *argv; argv++) 189 add_file(*argv); 190 else 191 add_file(NULL); 192 process(); 193 cfclose(prog, NULL); 194 if (fclose(stdout)) 195 err(FATAL, "stdout: %s", strerror(errno)); 196 exit (0); 197 } 198 199 /* 200 * Like fgets, but go through the chain of compilation units chaining them 201 * together. Empty strings and files are ignored. 202 */ 203 char * 204 cu_fgets(char *buf, int n) 205 { 206 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 207 static FILE *f; /* Current open file */ 208 static char *s; /* Current pointer inside string */ 209 static char string_ident[30]; 210 char *p; 211 212 again: 213 switch (state) { 214 case ST_EOF: 215 if (script == NULL) 216 return (NULL); 217 linenum = 0; 218 switch (script->type) { 219 case CU_FILE: 220 if ((f = fopen(script->s, "r")) == NULL) 221 err(FATAL, 222 "%s: %s", script->s, strerror(errno)); 223 fname = script->s; 224 state = ST_FILE; 225 goto again; 226 case CU_STRING: 227 if ((snprintf(string_ident, 228 sizeof(string_ident), "\"%s\"", script->s)) >= 229 sizeof(string_ident) - 1) 230 (void)strcpy(string_ident + 231 sizeof(string_ident) - 6, " ...\""); 232 fname = string_ident; 233 s = script->s; 234 state = ST_STRING; 235 goto again; 236 } 237 case ST_FILE: 238 if ((p = fgets(buf, n, f)) != NULL) { 239 linenum++; 240 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 241 nflag = 1; 242 return (p); 243 } 244 script = script->next; 245 (void)fclose(f); 246 state = ST_EOF; 247 goto again; 248 case ST_STRING: 249 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 250 nflag = 1; 251 p = buf; 252 for (;;) { 253 if (n-- <= 1) { 254 *p = '\0'; 255 linenum++; 256 return (buf); 257 } 258 switch (*s) { 259 case '\0': 260 state = ST_EOF; 261 if (s == script->s) { 262 script = script->next; 263 goto again; 264 } else { 265 script = script->next; 266 *p = '\0'; 267 linenum++; 268 return (buf); 269 } 270 case '\n': 271 *p++ = '\n'; 272 *p = '\0'; 273 s++; 274 linenum++; 275 return (buf); 276 default: 277 *p++ = *s++; 278 } 279 } 280 } 281 /* NOTREACHED */ 282 return (NULL); 283 } 284 285 /* 286 * Like fgets, but go through the list of files chaining them together. 287 * Set len to the length of the line. 288 */ 289 int 290 mf_fgets(SPACE *sp, enum e_spflag spflag) 291 { 292 static FILE *f; /* Current open file */ 293 size_t len; 294 char *p; 295 int c; 296 297 if (f == NULL) 298 /* Advance to first non-empty file */ 299 for (;;) { 300 if (files == NULL) { 301 lastline = 1; 302 return (0); 303 } 304 if (files->fname == NULL) { 305 f = stdin; 306 fname = "stdin"; 307 } else { 308 fname = files->fname; 309 if ((f = fopen(fname, "r")) == NULL) 310 err(FATAL, "%s: %s", 311 fname, strerror(errno)); 312 } 313 if ((c = getc(f)) != EOF) { 314 (void)ungetc(c, f); 315 break; 316 } 317 (void)fclose(f); 318 files = files->next; 319 } 320 321 if (lastline) { 322 sp->len = 0; 323 return (0); 324 } 325 326 /* 327 * Use fgetln so that we can handle essentially infinite input data. 328 * Can't use the pointer into the stdio buffer as the process space 329 * because the ungetc() can cause it to move. 330 */ 331 p = fgetln(f, &len); 332 if (ferror(f)) 333 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 334 cspace(sp, p, len, spflag); 335 336 linenum++; 337 /* Advance to next non-empty file */ 338 while ((c = getc(f)) == EOF) { 339 (void)fclose(f); 340 files = files->next; 341 if (files == NULL) { 342 lastline = 1; 343 return (1); 344 } 345 if (files->fname == NULL) { 346 f = stdin; 347 fname = "stdin"; 348 } else { 349 fname = files->fname; 350 if ((f = fopen(fname, "r")) == NULL) 351 err(FATAL, "%s: %s", fname, strerror(errno)); 352 } 353 } 354 (void)ungetc(c, f); 355 return (1); 356 } 357 358 /* 359 * Add a compilation unit to the linked list 360 */ 361 static void 362 add_compunit(enum e_cut type, char *s) 363 { 364 struct s_compunit *cu; 365 366 cu = xmalloc(sizeof(struct s_compunit)); 367 cu->type = type; 368 cu->s = s; 369 cu->next = NULL; 370 *cu_nextp = cu; 371 cu_nextp = &cu->next; 372 } 373 374 /* 375 * Add a file to the linked list 376 */ 377 static void 378 add_file(char *s) 379 { 380 struct s_flist *fp; 381 382 fp = xmalloc(sizeof(struct s_flist)); 383 fp->next = NULL; 384 *fl_nextp = fp; 385 fp->fname = s; 386 fl_nextp = &fp->next; 387 } 388
Indexes created Tue Sep 23 13:09:54 GMT 2025