main.c revision 1.18
1/* $NetBSD: main.c,v 1.18 2008/07/21 14:19:26 lukem 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 82static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; 83#else 84__RCSID("$NetBSD: main.c,v 1.18 2008/07/21 14:19:26 lukem 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 <regex.h> 94#include <stddef.h> 95#include <stdio.h> 96#include <stdlib.h> 97#include <string.h> 98#include <unistd.h> 99 100#include "defs.h" 101#include "extern.h" 102 103/* 104 * Linked list of units (strings and files) to be compiled 105 */ 106struct s_compunit { 107 struct s_compunit *next; 108 enum e_cut {CU_FILE, CU_STRING} type; 109 char *s; /* Pointer to string or fname */ 110}; 111 112/* 113 * Linked list pointer to compilation units and pointer to current 114 * next pointer. 115 */ 116static struct s_compunit *script, **cu_nextp = &script; 117 118/* 119 * Linked list of files to be processed 120 */ 121struct s_flist { 122 char *fname; 123 struct s_flist *next; 124}; 125 126/* 127 * Linked list pointer to files and pointer to current 128 * next pointer. 129 */ 130static struct s_flist *files, **fl_nextp = &files; 131 132int aflag, eflag, nflag, ere; 133 134/* 135 * Current file and line number; line numbers restart across compilation 136 * units, but span across input files. 137 */ 138char *fname; /* File name. */ 139u_long linenum; 140int lastline; /* TRUE on the last line of the last file */ 141 142static void add_compunit(enum e_cut, char *); 143static void add_file(char *); 144int main(int, char **); 145 146int 147main(int argc, char *argv[]) 148{ 149 int c, fflag; 150 151 setprogname(*argv); 152 fflag = 0; 153 while ((c = getopt(argc, argv, "ae:f:nE")) != -1) 154 switch (c) { 155 case 'a': 156 aflag = 1; 157 break; 158 case 'e': 159 eflag = 1; 160 add_compunit(CU_STRING, optarg); 161 break; 162 case 'f': 163 fflag = 1; 164 add_compunit(CU_FILE, optarg); 165 break; 166 case 'n': 167 nflag = 1; 168 break; 169 case 'E': 170 ere = REG_EXTENDED; 171 break; 172 default: 173 case '?': 174 (void)fprintf(stderr, 175"usage:\t%s [-aEn] script [file ...]\n\t%s [-aEn] [-e script] ... [-f script_file] ... [file ...]\n", 176 getprogname(), getprogname()); 177 exit(1); 178 } 179 argc -= optind; 180 argv += optind; 181 182 /* First usage case; script is the first arg */ 183 if (!eflag && !fflag && *argv) { 184 add_compunit(CU_STRING, *argv); 185 argv++; 186 } 187 188 compile(); 189 190 /* Continue with first and start second usage */ 191 if (*argv) 192 for (; *argv; argv++) 193 add_file(*argv); 194 else 195 add_file(NULL); 196 process(); 197 cfclose(prog, NULL); 198 if (fclose(stdout)) 199 err(FATAL, "stdout: %s", strerror(errno)); 200 exit (0); 201} 202 203/* 204 * Like fgets, but go through the chain of compilation units chaining them 205 * together. Empty strings and files are ignored. 206 */ 207char * 208cu_fgets(char *buf, int n) 209{ 210 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 211 static FILE *f; /* Current open file */ 212 static char *s; /* Current pointer inside string */ 213 static char string_ident[30]; 214 char *p; 215 216again: 217 switch (state) { 218 case ST_EOF: 219 if (script == NULL) 220 return (NULL); 221 linenum = 0; 222 switch (script->type) { 223 case CU_FILE: 224 if ((f = fopen(script->s, "r")) == NULL) 225 err(FATAL, 226 "%s: %s", script->s, strerror(errno)); 227 fname = script->s; 228 state = ST_FILE; 229 goto again; 230 case CU_STRING: 231 if ((snprintf(string_ident, 232 sizeof(string_ident), "\"%s\"", script->s)) >= 233 sizeof(string_ident) - 1) 234 (void)strcpy(string_ident + 235 sizeof(string_ident) - 6, " ...\""); 236 fname = string_ident; 237 s = script->s; 238 state = ST_STRING; 239 goto again; 240 } 241 case ST_FILE: 242 if ((p = fgets(buf, n, f)) != NULL) { 243 linenum++; 244 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 245 nflag = 1; 246 return (p); 247 } 248 script = script->next; 249 (void)fclose(f); 250 state = ST_EOF; 251 goto again; 252 case ST_STRING: 253 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 254 nflag = 1; 255 p = buf; 256 for (;;) { 257 if (n-- <= 1) { 258 *p = '\0'; 259 linenum++; 260 return (buf); 261 } 262 switch (*s) { 263 case '\0': 264 state = ST_EOF; 265 if (s == script->s) { 266 script = script->next; 267 goto again; 268 } else { 269 script = script->next; 270 *p = '\0'; 271 linenum++; 272 return (buf); 273 } 274 case '\n': 275 *p++ = '\n'; 276 *p = '\0'; 277 s++; 278 linenum++; 279 return (buf); 280 default: 281 *p++ = *s++; 282 } 283 } 284 } 285 /* NOTREACHED */ 286 return (NULL); 287} 288 289/* 290 * Like fgets, but go through the list of files chaining them together. 291 * Set len to the length of the line. 292 */ 293int 294mf_fgets(SPACE *sp, enum e_spflag spflag) 295{ 296 static FILE *f; /* Current open file */ 297 size_t len; 298 char *p; 299 int c; 300 301 if (f == NULL) 302 /* Advance to first non-empty file */ 303 for (;;) { 304 if (files == NULL) { 305 lastline = 1; 306 return (0); 307 } 308 if (files->fname == NULL) { 309 f = stdin; 310 fname = "stdin"; 311 } else { 312 fname = files->fname; 313 if ((f = fopen(fname, "r")) == NULL) 314 err(FATAL, "%s: %s", 315 fname, strerror(errno)); 316 } 317 if ((c = getc(f)) != EOF) { 318 (void)ungetc(c, f); 319 break; 320 } 321 (void)fclose(f); 322 files = files->next; 323 } 324 325 if (lastline) { 326 sp->len = 0; 327 return (0); 328 } 329 330 /* 331 * Use fgetln so that we can handle essentially infinite input data. 332 * Can't use the pointer into the stdio buffer as the process space 333 * because the ungetc() can cause it to move. 334 */ 335 p = fgetln(f, &len); 336 if (ferror(f)) 337 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 338 cspace(sp, p, len, spflag); 339 340 linenum++; 341 /* Advance to next non-empty file */ 342 while ((c = getc(f)) == EOF) { 343 (void)fclose(f); 344 files = files->next; 345 if (files == NULL) { 346 lastline = 1; 347 return (1); 348 } 349 if (files->fname == NULL) { 350 f = stdin; 351 fname = "stdin"; 352 } else { 353 fname = files->fname; 354 if ((f = fopen(fname, "r")) == NULL) 355 err(FATAL, "%s: %s", fname, strerror(errno)); 356 } 357 } 358 (void)ungetc(c, f); 359 return (1); 360} 361 362/* 363 * Add a compilation unit to the linked list 364 */ 365static void 366add_compunit(enum e_cut type, char *s) 367{ 368 struct s_compunit *cu; 369 370 cu = xmalloc(sizeof(struct s_compunit)); 371 cu->type = type; 372 cu->s = s; 373 cu->next = NULL; 374 *cu_nextp = cu; 375 cu_nextp = &cu->next; 376} 377 378/* 379 * Add a file to the linked list 380 */ 381static void 382add_file(char *s) 383{ 384 struct s_flist *fp; 385 386 fp = xmalloc(sizeof(struct s_flist)); 387 fp->next = NULL; 388 *fl_nextp = fp; 389 fp->fname = s; 390 fl_nextp = &fp->next; 391} 392