usr.bin/mkstr/mkstr.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)mkstr.c  8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/mkstr/mkstr.c,v 1.4.2.1 2002/11/16 01:07:42 tjr Exp $
  36  * $DragonFly: src/usr.bin/mkstr/mkstr.c,v 1.3 2008/06/05 18:06:33 swildner Exp $
  37  */
  38
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #define ungetchar(c)    ungetc(c, stdin)
  46
  47 /*
  48  * mkstr - create a string error message file by massaging C source
  49  *
  50  * Bill Joy UCB August 1977
  51  *
  52  * Modified March 1978 to hash old messages to be able to recompile
  53  * without addding messages to the message file (usually)
  54  *
  55  * Based on an earlier program conceived by Bill Joy and Chuck Haley
  56  *
  57  * Program to create a string error message file
  58  * from a group of C programs.  Arguments are the name
  59  * of the file where the strings are to be placed, the
  60  * prefix of the new files where the processed source text
  61  * is to be placed, and the files to be processed.
  62  *
  63  * The program looks for 'error("' in the source stream.
  64  * Whenever it finds this, the following characters from the '"'
  65  * to a '"' are replaced by 'seekpt' where seekpt is a
  66  * pointer into the error message file.
  67  * If the '(' is not immediately followed by a '"' no change occurs.
  68  *
  69  * The optional '-' causes strings to be added at the end of the
  70  * existing error message file for recompilation of single routines.
  71  */
  72
  73 FILE    *mesgread, *mesgwrite;
  74 char    name[100], *np;
  75
  76 void copystr(void);
  77 int fgetNUL(char *, int, FILE *);
  78 unsigned hashit(char *, int, unsigned);
  79 void inithash(void);
  80 int match(const char *);
  81 int octdigit(char);
  82 void process(void);
  83 void usage(void);
  84
  85 int
  86 main(int argc, char *argv[])
  87 {
  88         char addon = 0;
  89         size_t namelen;
  90
  91         argc--, argv++;
  92         if (argc > 1 && argv[0][0] == '-')
  93                 addon++, argc--, argv++;
  94         if (argc < 3)
  95                 usage();
  96         mesgwrite = fopen(argv[0], addon ? "a" : "w");
  97         if (mesgwrite == NULL)
  98                 err(1, "%s", argv[0]);
  99         mesgread = fopen(argv[0], "r");
 100         if (mesgread == NULL)
 101                 err(1, "%s", argv[0]);
 102         inithash();
 103         argc--, argv++;
 104         namelen = strlcpy(name, argv[0], sizeof(name));
 105         if (namelen >= sizeof(name)) {
 106                 errno = ENAMETOOLONG;
 107                 err(1, "%s", argv[0]);
 108         }
 109         np = name + namelen;
 110         argc--, argv++;
 111         do {
 112                 if (strlcpy(np, argv[0], sizeof(name) - namelen) >=
 113                     sizeof(name) - namelen) {
 114                         errno = ENAMETOOLONG;
 115                         err(1, "%s%s", name, argv[0]);
 116                 }
 117                 if (freopen(name, "w", stdout) == NULL)
 118                         err(1, "%s", name);
 119                 if (freopen(argv[0], "r", stdin) == NULL)
 120                         err(1, "%s", argv[0]);
 121                 process();
 122                 argc--, argv++;
 123         } while (argc > 0);
 124         exit(0);
 125 }
 126
 127 void
 128 usage(void)
 129 {
 130         fprintf(stderr, "usage: mkstr [-] mesgfile prefix file ...\n");
 131         exit(1);
 132 }
 133
 134 void
 135 process(void)
 136 {
 137         int c;
 138
 139         for (;;) {
 140                 c = getchar();
 141                 if (c == EOF)
 142                         return;
 143                 if (c != 'e') {
 144                         putchar(c);
 145                         continue;
 146                 }
 147                 if (match("error(")) {
 148                         printf("error(");
 149                         c = getchar();
 150                         if (c != '"')
 151                                 putchar(c);
 152                         else
 153                                 copystr();
 154                 }
 155         }
 156 }
 157
 158 int
 159 match(const char *ocp)
 160 {
 161         const char *cp;
 162         int c;
 163
 164         for (cp = ocp + 1; *cp; cp++) {
 165                 c = getchar();
 166                 if (c != *cp) {
 167                         while (ocp < cp)
 168                                 putchar(*ocp++);
 169                         ungetchar(c);
 170                         return (0);
 171                 }
 172         }
 173         return (1);
 174 }
 175
 176 void
 177 copystr(void)
 178 {
 179         int c, ch;
 180         char buf[512];
 181         char *cp = buf;
 182
 183         for (;;) {
 184                 if (cp == buf + sizeof(buf) - 2)
 185                         errx(1, "message too long");
 186                 c = getchar();
 187                 if (c == EOF)
 188                         break;
 189                 switch (c) {
 190
 191                 case '"':
 192                         *cp++ = 0;
 193                         goto out;
 194                 case '\\':
 195                         c = getchar();
 196                         switch (c) {
 197
 198                         case 'b':
 199                                 c = '\b';
 200                                 break;
 201                         case 't':
 202                                 c = '\t';
 203                                 break;
 204                         case 'r':
 205                                 c = '\r';
 206                                 break;
 207                         case 'n':
 208                                 c = '\n';
 209                                 break;
 210                         case '\n':
 211                                 continue;
 212                         case 'f':
 213                                 c = '\f';
 214                                 break;
 215                         case '0':
 216                                 c = 0;
 217                                 break;
 218                         case '\\':
 219                                 break;
 220                         default:
 221                                 if (!octdigit(c))
 222                                         break;
 223                                 c -= '0';
 224                                 ch = getchar();
 225                                 if (!octdigit(ch))
 226                                         break;
 227                                 c <<= 7, c += ch - '0';
 228                                 ch = getchar();
 229                                 if (!octdigit(ch))
 230                                         break;
 231                                 c <<= 3, c+= ch - '0', ch = -1;
 232                                 break;
 233                         }
 234                 }
 235                 *cp++ = c;
 236         }
 237 out:
 238         *cp = 0;
 239         printf("%d", hashit(buf, 1, 0));
 240 }
 241
 242 int
 243 octdigit(char c)
 244 {
 245
 246         return (c >= '0' && c <= '7');
 247 }
 248
 249 void
 250 inithash(void)
 251 {
 252         char buf[512];
 253         int mesgpt = 0;
 254
 255         rewind(mesgread);
 256         while (fgetNUL(buf, sizeof buf, mesgread) != 0) {
 257                 hashit(buf, 0, mesgpt);
 258                 mesgpt += strlen(buf) + 2;
 259         }
 260 }
 261
 262 #define NBUCKETS        511
 263
 264 struct  hash {
 265         long    hval;
 266         unsigned hpt;
 267         struct  hash *hnext;
 268 } *bucket[NBUCKETS];
 269
 270 unsigned
 271 hashit(char *str, int really, unsigned fakept)
 272 {
 273         int i;
 274         struct hash *hp;
 275         char buf[512];
 276         long hashval = 0;
 277         char *cp;
 278
 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, (long) hp->hpt, 0);
 290                         fgetNUL(buf, sizeof buf, mesgread);
 291 /*
 292                         fprintf(stderr, "Got (from %d) %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                 if (hp == NULL)
 300                         err(1, NULL);
 301                 hp->hnext = bucket[i];
 302                 hp->hval = hashval;
 303                 hp->hpt = really ? ftell(mesgwrite) : fakept;
 304                 if (really) {
 305                         fwrite(str, sizeof (char), strlen(str) + 1, mesgwrite);
 306                         fwrite("\n", sizeof (char), 1, mesgwrite);
 307                 }
 308                 bucket[i] = hp;
 309         }
 310 /*
 311         fprintf(stderr, "%s hashed to %ld at %d\n", str, hp->hval, hp->hpt);
 312 */
 313         return (hp->hpt);
 314 }
 315
 316 int
 317 fgetNUL(char *obuf, int rmdr, FILE *file)
 318 {
 319         int c;
 320         char *buf = obuf;
 321
 322         while (--rmdr > 0 && (c = getc(file)) != 0 && c != EOF)
 323                 *buf++ = c;
 324         *buf++ = 0;
 325         getc(file);
 326         return ((feof(file) || ferror(file)) ? 0 : 1);
 327 }