main.c revision 1.9
1 /* $NetBSD: main.c,v 1.9 1997/01/09 20:21:30 tls Exp $ */ 2 3 /*- 4 * Copyright (c) 1992 Diomidis Spinellis. 5 * Copyright (c) 1992, 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 * Diomidis Spinellis of Imperial College, University of London. 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #ifndef lint 41 static char copyright[] = 42 "@(#) Copyright (c) 1992, 1993\n\ 43 The Regents of the University of California. All rights reserved.\n"; 44 #endif /* not lint */ 45 46 #ifndef lint 47 /* from: static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; */ 48 static char *rcsid = "$NetBSD: main.c,v 1.9 1997/01/09 20:21:30 tls Exp $"; 49 #endif /* not lint */ 50 51 #include <sys/types.h> 52 53 #include <ctype.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <regex.h> 57 #include <stddef.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include "defs.h" 64 #include "extern.h" 65 66 /* 67 * Linked list of units (strings and files) to be compiled 68 */ 69 struct s_compunit { 70 struct s_compunit *next; 71 enum e_cut {CU_FILE, CU_STRING} type; 72 char *s; /* Pointer to string or fname */ 73 }; 74 75 /* 76 * Linked list pointer to compilation units and pointer to current 77 * next pointer. 78 */ 79 static struct s_compunit *script, **cu_nextp = &script; 80 81 /* 82 * Linked list of files to be processed 83 */ 84 struct s_flist { 85 char *fname; 86 struct s_flist *next; 87 }; 88 89 /* 90 * Linked list pointer to files and pointer to current 91 * next pointer. 92 */ 93 static struct s_flist *files, **fl_nextp = &files; 94 95 int aflag, eflag, nflag; 96 97 /* 98 * Current file and line number; line numbers restart across compilation 99 * units, but span across input files. 100 */ 101 char *fname; /* File name. */ 102 u_long linenum; 103 int lastline; /* TRUE on the last line of the last file */ 104 105 static void add_compunit __P((enum e_cut, char *)); 106 static void add_file __P((char *)); 107 108 int 109 main(argc, argv) 110 int argc; 111 char *argv[]; 112 { 113 int c, fflag; 114 115 fflag = 0; 116 while ((c = getopt(argc, argv, "ae:f:n")) != EOF) 117 switch (c) { 118 case 'a': 119 aflag = 1; 120 break; 121 case 'e': 122 eflag = 1; 123 add_compunit(CU_STRING, optarg); 124 break; 125 case 'f': 126 fflag = 1; 127 add_compunit(CU_FILE, optarg); 128 break; 129 case 'n': 130 nflag = 1; 131 break; 132 default: 133 case '?': 134 (void)fprintf(stderr, 135 "usage:\tsed script [-an] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n"); 136 exit(1); 137 } 138 argc -= optind; 139 argv += optind; 140 141 /* First usage case; script is the first arg */ 142 if (!eflag && !fflag && *argv) { 143 add_compunit(CU_STRING, *argv); 144 argv++; 145 } 146 147 compile(); 148 149 /* Continue with first and start second usage */ 150 if (*argv) 151 for (; *argv; argv++) 152 add_file(*argv); 153 else 154 add_file(NULL); 155 process(); 156 cfclose(prog, NULL); 157 if (fclose(stdout)) 158 err(FATAL, "stdout: %s", strerror(errno)); 159 exit (0); 160 } 161 162 /* 163 * Like fgets, but go through the chain of compilation units chaining them 164 * together. Empty strings and files are ignored. 165 */ 166 char * 167 cu_fgets(buf, n) 168 char *buf; 169 int n; 170 { 171 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; 172 static FILE *f; /* Current open file */ 173 static char *s; /* Current pointer inside string */ 174 static char string_ident[30]; 175 char *p; 176 177 again: 178 switch (state) { 179 case ST_EOF: 180 if (script == NULL) 181 return (NULL); 182 linenum = 0; 183 switch (script->type) { 184 case CU_FILE: 185 if ((f = fopen(script->s, "r")) == NULL) 186 err(FATAL, 187 "%s: %s", script->s, strerror(errno)); 188 fname = script->s; 189 state = ST_FILE; 190 goto again; 191 case CU_STRING: 192 if ((snprintf(string_ident, 193 sizeof(string_ident), "\"%s\"", script->s)) >= 194 sizeof(string_ident) - 1) 195 (void)strcpy(string_ident + 196 sizeof(string_ident) - 6, " ...\""); 197 fname = string_ident; 198 s = script->s; 199 state = ST_STRING; 200 goto again; 201 } 202 case ST_FILE: 203 if ((p = fgets(buf, n, f)) != NULL) { 204 linenum++; 205 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') 206 nflag = 1; 207 return (p); 208 } 209 script = script->next; 210 (void)fclose(f); 211 state = ST_EOF; 212 goto again; 213 case ST_STRING: 214 if (linenum == 0 && s[0] == '#' && s[1] == 'n') 215 nflag = 1; 216 p = buf; 217 for (;;) { 218 if (n-- <= 1) { 219 *p = '\0'; 220 linenum++; 221 return (buf); 222 } 223 switch (*s) { 224 case '\0': 225 state = ST_EOF; 226 if (s == script->s) { 227 script = script->next; 228 goto again; 229 } else { 230 script = script->next; 231 *p = '\0'; 232 linenum++; 233 return (buf); 234 } 235 case '\n': 236 *p++ = '\n'; 237 *p = '\0'; 238 s++; 239 linenum++; 240 return (buf); 241 default: 242 *p++ = *s++; 243 } 244 } 245 } 246 /* NOTREACHED */ 247 } 248 249 /* 250 * Like fgets, but go through the list of files chaining them together. 251 * Set len to the length of the line. 252 */ 253 int 254 mf_fgets(sp, spflag) 255 SPACE *sp; 256 enum e_spflag spflag; 257 { 258 static FILE *f; /* Current open file */ 259 size_t len; 260 char *p; 261 int c; 262 263 if (f == NULL) 264 /* Advance to first non-empty file */ 265 for (;;) { 266 if (files == NULL) { 267 lastline = 1; 268 return (0); 269 } 270 if (files->fname == NULL) { 271 f = stdin; 272 fname = "stdin"; 273 } else { 274 fname = files->fname; 275 if ((f = fopen(fname, "r")) == NULL) 276 err(FATAL, "%s: %s", 277 fname, strerror(errno)); 278 } 279 if ((c = getc(f)) != EOF) { 280 (void)ungetc(c, f); 281 break; 282 } 283 (void)fclose(f); 284 files = files->next; 285 } 286 287 if (lastline) { 288 sp->len = 0; 289 return (0); 290 } 291 292 /* 293 * Use fgetln so that we can handle essentially infinite input data. 294 * Can't use the pointer into the stdio buffer as the process space 295 * because the ungetc() can cause it to move. 296 */ 297 p = fgetln(f, &len); 298 if (ferror(f)) 299 err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); 300 cspace(sp, p, len, spflag); 301 302 linenum++; 303 /* Advance to next non-empty file */ 304 while ((c = getc(f)) == EOF) { 305 (void)fclose(f); 306 files = files->next; 307 if (files == NULL) { 308 lastline = 1; 309 return (1); 310 } 311 if (files->fname == NULL) { 312 f = stdin; 313 fname = "stdin"; 314 } else { 315 fname = files->fname; 316 if ((f = fopen(fname, "r")) == NULL) 317 err(FATAL, "%s: %s", fname, strerror(errno)); 318 } 319 } 320 (void)ungetc(c, f); 321 return (1); 322 } 323 324 /* 325 * Add a compilation unit to the linked list 326 */ 327 static void 328 add_compunit(type, s) 329 enum e_cut type; 330 char *s; 331 { 332 struct s_compunit *cu; 333 334 cu = xmalloc(sizeof(struct s_compunit)); 335 cu->type = type; 336 cu->s = s; 337 cu->next = NULL; 338 *cu_nextp = cu; 339 cu_nextp = &cu->next; 340 } 341 342 /* 343 * Add a file to the linked list 344 */ 345 static void 346 add_file(s) 347 char *s; 348 { 349 struct s_flist *fp; 350 351 fp = xmalloc(sizeof(struct s_flist)); 352 fp->next = NULL; 353 *fl_nextp = fp; 354 fp->fname = s; 355 fl_nextp = &fp->next; 356 } 357
Indexes created Thu Sep 25 16:09:42 GMT 2025