4.3BSD - /usr/src/ucb/mkstr.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: char copyright[] =
   9: "@(#) Copyright (c) 1980 Regents of the University of California.\n\
  10:  All rights reserved.\n";
  11: #endif not lint
  12: 
  13: #ifndef lint
  14: static char sccsid[] = "@(#)mkstr.c	5.1 (Berkeley) 5/31/85";
  15: #endif not lint
  16: 
  17: #include <stdio.h>
  18: 
  19: #define ungetchar(c)    ungetc(c, stdin)
  20: 
  21: long    ftell();
  22: char    *calloc();
  23: /*
  24:  * mkstr - create a string error message file by massaging C source
  25:  *
  26:  * Bill Joy UCB August 1977
  27:  *
  28:  * Modified March 1978 to hash old messages to be able to recompile
  29:  * without addding messages to the message file (usually)
  30:  *
  31:  * Based on an earlier program conceived by Bill Joy and Chuck Haley
  32:  *
  33:  * Program to create a string error message file
  34:  * from a group of C programs.  Arguments are the name
  35:  * of the file where the strings are to be placed, the
  36:  * prefix of the new files where the processed source text
  37:  * is to be placed, and the files to be processed.
  38:  *
  39:  * The program looks for 'error("' in the source stream.
  40:  * Whenever it finds this, the following characters from the '"'
  41:  * to a '"' are replaced by 'seekpt' where seekpt is a
  42:  * pointer into the error message file.
  43:  * If the '(' is not immediately followed by a '"' no change occurs.
  44:  *
  45:  * The optional '-' causes strings to be added at the end of the
  46:  * existing error message file for recompilation of single routines.
  47:  */
  48: 
  49: 
  50: FILE    *mesgread, *mesgwrite;
  51: char    *progname;
  52: char    usagestr[] =    "usage: %s [ - ] mesgfile prefix file ...\n";
  53: char    name[100], *np;
  54: 
  55: main(argc, argv)
  56:     int argc;
  57:     char *argv[];
  58: {
  59:     char addon = 0;
  60: 
  61:     argc--, progname = *argv++;
  62:     if (argc > 1 && argv[0][0] == '-')
  63:         addon++, argc--, argv++;
  64:     if (argc < 3)
  65:         fprintf(stderr, usagestr, progname), exit(1);
  66:     mesgwrite = fopen(argv[0], addon ? "a" : "w");
  67:     if (mesgwrite == NULL)
  68:         perror(argv[0]), exit(1);
  69:     mesgread = fopen(argv[0], "r");
  70:     if (mesgread == NULL)
  71:         perror(argv[0]), exit(1);
  72:     inithash();
  73:     argc--, argv++;
  74:     strcpy(name, argv[0]);
  75:     np = name + strlen(name);
  76:     argc--, argv++;
  77:     do {
  78:         strcpy(np, argv[0]);
  79:         if (freopen(name, "w", stdout) == NULL)
  80:             perror(name), exit(1);
  81:         if (freopen(argv[0], "r", stdin) == NULL)
  82:             perror(argv[0]), exit(1);
  83:         process();
  84:         argc--, argv++;
  85:     } while (argc > 0);
  86:     exit(0);
  87: }
  88: 
  89: process()
  90: {
  91:     register char *cp;
  92:     register c;
  93: 
  94:     for (;;) {
  95:         c = getchar();
  96:         if (c == EOF)
  97:             return;
  98:         if (c != 'e') {
  99:             putchar(c);
 100:             continue;
 101:         }
 102:         if (match("error(")) {
 103:             printf("error(");
 104:             c = getchar();
 105:             if (c != '"')
 106:                 putchar(c);
 107:             else
 108:                 copystr();
 109:         }
 110:     }
 111: }
 112: 
 113: match(ocp)
 114:     char *ocp;
 115: {
 116:     register char *cp;
 117:     register c;
 118: 
 119:     for (cp = ocp + 1; *cp; cp++) {
 120:         c = getchar();
 121:         if (c != *cp) {
 122:             while (ocp < cp)
 123:                 putchar(*ocp++);
 124:             ungetchar(c);
 125:             return (0);
 126:         }
 127:     }
 128:     return (1);
 129: }
 130: 
 131: copystr()
 132: {
 133:     register c, ch;
 134:     char buf[512];
 135:     register char *cp = buf;
 136: 
 137:     for (;;) {
 138:         c = getchar();
 139:         if (c == EOF)
 140:             break;
 141:         switch (c) {
 142: 
 143:         case '"':
 144:             *cp++ = 0;
 145:             goto out;
 146:         case '\\':
 147:             c = getchar();
 148:             switch (c) {
 149: 
 150:             case 'b':
 151:                 c = '\b';
 152:                 break;
 153:             case 't':
 154:                 c = '\t';
 155:                 break;
 156:             case 'r':
 157:                 c = '\r';
 158:                 break;
 159:             case 'n':
 160:                 c = '\n';
 161:                 break;
 162:             case '\n':
 163:                 continue;
 164:             case 'f':
 165:                 c = '\f';
 166:                 break;
 167:             case '0':
 168:                 c = 0;
 169:                 break;
 170:             case '\\':
 171:                 break;
 172:             default:
 173:                 if (!octdigit(c))
 174:                     break;
 175:                 c -= '0';
 176:                 ch = getchar();
 177:                 if (!octdigit(ch))
 178:                     break;
 179:                 c <<= 7, c += ch - '0';
 180:                 ch = getchar();
 181:                 if (!octdigit(ch))
 182:                     break;
 183:                 c <<= 3, c+= ch - '0', ch = -1;
 184:                 break;
 185:             }
 186:         }
 187:         *cp++ = c;
 188:     }
 189: out:
 190:     *cp = 0;
 191:     printf("%d", hashit(buf, 1, NULL));
 192: }
 193: 
 194: octdigit(c)
 195:     char c;
 196: {
 197: 
 198:     return (c >= '0' && c <= '7');
 199: }
 200: 
 201: inithash()
 202: {
 203:     char buf[512];
 204:     int mesgpt = 0;
 205: 
 206:     rewind(mesgread);
 207:     while (fgetNUL(buf, sizeof buf, mesgread) != NULL) {
 208:         hashit(buf, 0, mesgpt);
 209:         mesgpt += strlen(buf) + 2;
 210:     }
 211: }
 212: 
 213: #define NBUCKETS    511
 214: 
 215: struct  hash {
 216:     long    hval;
 217:     unsigned hpt;
 218:     struct  hash *hnext;
 219: } *bucket[NBUCKETS];
 220: 
 221: hashit(str, really, fakept)
 222:     char *str;
 223:     char really;
 224:     unsigned fakept;
 225: {
 226:     int i;
 227:     register struct hash *hp;
 228:     char buf[512];
 229:     long hashval = 0;
 230:     register char *cp;
 231: 
 232:     if (really)
 233:         fflush(mesgwrite);
 234:     for (cp = str; *cp;)
 235:         hashval = (hashval << 1) + *cp++;
 236:     i = hashval % NBUCKETS;
 237:     if (i < 0)
 238:         i += NBUCKETS;
 239:     if (really != 0)
 240:         for (hp = bucket[i]; hp != 0; hp = hp->hnext)
 241:         if (hp->hval == hashval) {
 242:             fseek(mesgread, (long) hp->hpt, 0);
 243:             fgetNUL(buf, sizeof buf, mesgread);
 244: /*
 245: 			fprintf(stderr, "Got (from %d) %s\n", hp->hpt, buf);
 246: */
 247:             if (strcmp(buf, str) == 0)
 248:                 break;
 249:         }
 250:     if (!really || hp == 0) {
 251:         hp = (struct hash *) calloc(1, sizeof *hp);
 252:         hp->hnext = bucket[i];
 253:         hp->hval = hashval;
 254:         hp->hpt = really ? ftell(mesgwrite) : fakept;
 255:         if (really) {
 256:             fwrite(str, sizeof (char), strlen(str) + 1, mesgwrite);
 257:             fwrite("\n", sizeof (char), 1, mesgwrite);
 258:         }
 259:         bucket[i] = hp;
 260:     }
 261: /*
 262: 	fprintf(stderr, "%s hashed to %ld at %d\n", str, hp->hval, hp->hpt);
 263: */
 264:     return (hp->hpt);
 265: }
 266: 
 267: #include <sys/types.h>
 268: #include <sys/stat.h>
 269: 
 270: fgetNUL(obuf, rmdr, file)
 271:     char *obuf;
 272:     register int rmdr;
 273:     FILE *file;
 274: {
 275:     register c;
 276:     register char *buf = obuf;
 277: 
 278:     while (--rmdr > 0 && (c = getc(file)) != 0 && c != EOF)
 279:         *buf++ = c;
 280:     *buf++ = 0;
 281:     getc(file);
 282:     return ((feof(file) || ferror(file)) ? NULL : 1);
 283: }

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