usr.bin/mkstr/mkstr.c

   1 /*      $NetBSD: mkstr.c,v 1.13 2009/04/12 14:28:30 lukem Exp $ */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)mkstr.c     8.1 (Berkeley) 6/6/93";
  41 #else
  42 __RCSID("$NetBSD: mkstr.c,v 1.13 2009/04/12 14:28:30 lukem Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49
  50 #define ungetchar(c)    ungetc(c, stdin)
  51
  52 /*
  53  * mkstr - create a string error message file by massaging C source
  54  *
  55  * Bill Joy UCB August 1977
  56  *
  57  * Modified March 1978 to hash old messages to be able to recompile
  58  * without addding messages to the message file (usually)
  59  *
  60  * Based on an earlier program conceived by Bill Joy and Chuck Haley
  61  *
  62  * Program to create a string error message file
  63  * from a group of C programs.  Arguments are the name
  64  * of the file where the strings are to be placed, the
  65  * prefix of the new files where the processed source text
  66  * is to be placed, and the files to be processed.
  67  *
  68  * The program looks for 'error("' in the source stream.
  69  * Whenever it finds this, the following characters from the '"'
  70  * to a '"' are replaced by 'seekpt' where seekpt is a
  71  * pointer into the error message file.
  72  * If the '(' is not immediately followed by a '"' no change occurs.
  73  *
  74  * The optional '-' causes strings to be added at the end of the
  75  * existing error message file for recompilation of single routines.
  76  */
  77
  78
  79 FILE    *mesgread, *mesgwrite;
  80 char    *progname;
  81 const char      usagestr[] =    "usage: %s [ - ] mesgfile prefix file ...\n";
  82 char    name[100], *np;
  83
  84 void process __P((void));
  85 int main __P((int, char **));
  86 int match __P((const char *));
  87 int octdigit __P((char));
  88 void inithash __P((void));
  89 long hashit __P((char *, char, long));
  90 void copystr __P((void));
  91 int fgetNUL __P((char *, int, FILE *));
  92
  93 int
  94 main(argc, argv)
  95         int argc;
  96         char *argv[];
  97 {
  98         char addon = 0;
  99
 100         argc--, progname = *argv++;
 101         if (argc > 1 && argv[0][0] == '-')
 102                 addon++, argc--, argv++;
 103         if (argc < 3)
 104                 fprintf(stderr, usagestr, progname), exit(1);
 105         mesgwrite = fopen(argv[0], addon ? "a" : "w");
 106         if (mesgwrite == NULL)
 107                 perror(argv[0]), exit(1);
 108         mesgread = fopen(argv[0], "r");
 109         if (mesgread == NULL)
 110                 perror(argv[0]), exit(1);
 111         inithash();
 112         argc--, argv++;
 113         strlcpy(name, argv[0], sizeof(name));
 114         np = name + strlen(name);
 115         argc--, argv++;
 116         do {
 117                 strlcpy(np, argv[0], sizeof(name) - (np - name));
 118                 if (freopen(name, "w", stdout) == NULL)
 119                         perror(name), exit(1);
 120                 if (freopen(argv[0], "r", stdin) == NULL)
 121                         perror(argv[0]), exit(1);
 122                 process();
 123                 argc--, argv++;
 124         } while (argc > 0);
 125         exit(0);
 126 }
 127
 128 void
 129 process()
 130 {
 131         int c;
 132
 133         for (;;) {
 134                 c = getchar();
 135                 if (c == EOF)
 136                         return;
 137                 if (c != 'e') {
 138                         putchar(c);
 139                         continue;
 140                 }
 141                 if (match("error(")) {
 142                         printf("error(");
 143                         c = getchar();
 144                         if (c != '"')
 145                                 putchar(c);
 146                         else
 147                                 copystr();
 148                 }
 149         }
 150 }
 151
 152 int
 153 match(ocp)
 154         const char *ocp;
 155 {
 156         const char *cp;
 157         int c;
 158
 159         for (cp = ocp + 1; *cp; cp++) {
 160                 c = getchar();
 161                 if (c != *cp) {
 162                         while (ocp < cp)
 163                                 putchar(*ocp++);
 164                         ungetchar(c);
 165                         return (0);
 166                 }
 167         }
 168         return (1);
 169 }
 170
 171 void
 172 copystr()
 173 {
 174         int c, ch;
 175         char buf[512];
 176         char *cp = buf;
 177
 178         for (;;) {
 179                 c = getchar();
 180                 if (c == EOF)
 181                         break;
 182                 switch (c) {
 183
 184                 case '"':
 185                         *cp++ = 0;
 186                         goto out;
 187                 case '\\':
 188                         c = getchar();
 189                         switch (c) {
 190
 191                         case 'b':
 192                                 c = '\b';
 193                                 break;
 194                         case 't':
 195                                 c = '\t';
 196                                 break;
 197                         case 'r':
 198                                 c = '\r';
 199                                 break;
 200                         case 'n':
 201                                 c = '\n';
 202                                 break;
 203                         case '\n':
 204                                 continue;
 205                         case 'f':
 206                                 c = '\f';
 207                                 break;
 208                         case '0':
 209                                 c = 0;
 210                                 break;
 211                         case '\\':
 212                                 break;
 213                         default:
 214                                 if (!octdigit(c))
 215                                         break;
 216                                 c -= '0';
 217                                 ch = getchar();
 218                                 if (!octdigit(ch))
 219                                         break;
 220                                 c <<= 7, c += ch - '0';
 221                                 ch = getchar();
 222                                 if (!octdigit(ch))
 223                                         break;
 224                                 c <<= 3, c+= ch - '0', ch = -1;
 225                                 break;
 226                         }
 227                 }
 228                 *cp++ = c;
 229         }
 230 out:
 231         *cp = 0;
 232         printf("%ld", hashit(buf, 1, 0));
 233 }
 234
 235 int
 236 octdigit(c)
 237         char c;
 238 {
 239
 240         return (c >= '0' && c <= '7');
 241 }
 242
 243 void
 244 inithash()
 245 {
 246         char buf[512];
 247         long mesgpt = 0;
 248
 249         rewind(mesgread);
 250         while (fgetNUL(buf, sizeof buf, mesgread) != 0) {
 251                 hashit(buf, 0, mesgpt);
 252                 mesgpt += strlen(buf) + 2;
 253         }
 254 }
 255
 256 #define NBUCKETS        511
 257
 258 struct  hash {
 259         long    hval;
 260         long    hpt;
 261         struct  hash *hnext;
 262 } *bucket[NBUCKETS];
 263
 264 long
 265 hashit(str, really, fakept)
 266         char *str;
 267         char really;
 268         long fakept;
 269 {
 270         int i;
 271         struct hash *hp;
 272         char buf[512];
 273         long hashval = 0;
 274         char *cp;
 275
 276 #ifdef __GNUC__
 277         hp = NULL;      /* XXX gcc */
 278 #endif
 279         if (really)
 280                 fflush(mesgwrite);
 281         for (cp = str; *cp;)
 282                 hashval = (hashval << 1) + *cp++;
 283         i = hashval % NBUCKETS;
 284         if (i < 0)
 285                 i += NBUCKETS;
 286         if (really != 0)
 287                 for (hp = bucket[i]; hp != 0; hp = hp->hnext)
 288                 if (hp->hval == hashval) {
 289                         fseek(mesgread, hp->hpt, 0);
 290                         fgetNUL(buf, sizeof buf, mesgread);
 291 /*
 292                         fprintf(stderr, "Got (from %ld) %s\n", hp->hpt, buf);
 293 */
 294                         if (strcmp(buf, str) == 0)
 295                                 break;
 296                 }
 297         if (!really || hp == 0) {
 298                 hp = (struct hash *) calloc(1, sizeof *hp);
 299                 hp->hnext = bucket[i];
 300                 hp->hval = hashval;
 301                 hp->hpt = really ? ftell(mesgwrite) : fakept;
 302                 if (really) {
 303                         fwrite(str, sizeof (char), strlen(str) + 1, mesgwrite);
 304                         fwrite("\n", sizeof (char), 1, mesgwrite);
 305                 }
 306                 bucket[i] = hp;
 307         }
 308 /*
 309         fprintf(stderr, "%s hashed to %ld at %ld\n", str, hp->hval, hp->hpt);
 310 */
 311         return (hp->hpt);
 312 }
 313
 314 #include <sys/types.h>
 315 #include <sys/stat.h>
 316
 317 int
 318 fgetNUL(obuf, rmdr, file)
 319         char *obuf;
 320         int rmdr;
 321         FILE *file;
 322 {
 323         int c;
 324         char *buf = obuf;
 325
 326         while (--rmdr > 0 && (c = getc(file)) != 0 && c != EOF)
 327                 *buf++ = c;
 328         *buf++ = 0;
 329         getc(file);
 330         return ((feof(file) || ferror(file)) ? 0 : 1);
 331 }