4.3BSD - /usr/src/new/rcs/src/rcskeep.c

   1: /*
   2:  *                     RCS keyword extraction
   3:  */
   4:  static char rcsid[]=
   5:  "$Header: /usr/wft/RCS/SRC/RCS/rcskeep.c,v 3.2 82/12/24 12:08:26 wft Exp $ Purdue CS";
   6: /*****************************************************************************
   7:  *                       main routine: getoldkeys()
   8:  *                       Testprogram: define GETOLDTEST
   9:  *****************************************************************************
  10:  *
  11:  * Copyright (C) 1982 by Walter F. Tichy
  12:  *                       Purdue University
  13:  *                       Computer Science Department
  14:  *                       West Lafayette, IN 47907
  15:  *
  16:  * All rights reserved. No part of this software may be sold or distributed
  17:  * in any form or by any means without the prior written permission of the
  18:  * author.
  19:  * Report problems and direct all inquiries to Tichy@purdue (ARPA net).
  20:  */
  21: 
  22: 
  23: 
  24: /* $Log:	rcskeep.c,v $
  25:  * Revision 3.2  82/12/24  12:08:26  wft
  26:  * added missing #endif.
  27:  *
  28:  * Revision 3.1  82/12/04  13:22:41  wft
  29:  * Initial revision.
  30:  *
  31:  */
  32: 
  33: /*
  34: #define GETOLDTEST
  35: /* Testprogram; prints out the keyword values found. */
  36: 
  37: #include  "rcsbase.h"
  38: extern char * checkid();
  39: extern FILE * fopen();
  40: 
  41: FILE * fp;
  42: #define IDLENGTH 30
  43: char prevauthor[IDLENGTH];
  44: char prevdate[datelength];
  45: char prevrev[revlength];
  46: char prevsource[NCPPN];
  47: char prevstate [IDLENGTH];
  48: char prevlocker[IDLENGTH];
  49: 
  50: getoldkeys(fname)
  51: /* Function: Tries to read keyword values for author, date,
  52:  * revision number, RCS file, and state out of the file fname.
  53:  * The results are placed into
  54:  * prevauthor, prevdate, prevrev, prevsource, and prevstate.
  55:  * Aborts immediately if it finds an error and returns false.
  56:  * If it returns true, it doesn't mean that any of the
  57:  * values were found; instead, check to see whether the corresponding arrays
  58:  * contain the empty string.
  59:  */
  60: {
  61:     register int c;
  62:     char keyword[keylength+2];
  63:     register char * tp;
  64: 
  65:     /* initialize to empty */
  66:     prevauthor[0]=prevsource[0]=prevstate[0]=prevdate[0]=prevrev[0]= '\0';
  67: 
  68:     if ( (fp = fopen(fname, "r") ) == NULL ) {
  69:        error("Can't open %s\n", fname);
  70:        return false;
  71:     }
  72:     while( (c=getc(fp)) != EOF) {
  73:         if ( c==KDELIM) {
  74:             /* try to get keyword */
  75:             tp = keyword;
  76:             while( ctab[(c=getc(fp))]==LETTER && tp< keyword+keylength)
  77:                 *tp++ = c;
  78:             if (c==KDELIM) {ungetc(c,fp);continue;}
  79:             if (c!=VDELIM) continue;
  80:             *tp='\0';
  81:             while ((c=getc(fp))==' '||c=='\t'); /* skip blanks */
  82:             ungetc(c,fp); /* needed for getval */
  83:             if (strcmp(keyword, AUTHOR)==0 ) {
  84:                 if (getval(prevauthor,IDLENGTH,true))
  85:                     if (!checkid(prevauthor)) goto errexit;
  86:             } elsif ( strcmp(keyword,DATE)==0 ) {
  87:                 if (!getprevdate(true)) goto errexit;
  88:             } elsif ( strcmp(keyword, HEADER)==0 ) {
  89:                 if (getval(prevsource,NCPPN,true)) {
  90:                     if (!getval(prevrev,revlength,false)) goto errexit;
  91:                     if (!checknum(prevrev,-1)) {
  92:                         error("Bad revision number");
  93:                         goto errexit;
  94:                     }
  95:                     if (!getprevdate(false)) goto errexit;
  96:                     if (!getval(prevauthor,IDLENGTH,false)) goto errexit;
  97:                     if (!checkid(prevauthor)) goto errexit;
  98:                     if (!getval(prevstate,IDLENGTH,false)) goto errexit;
  99:                     if (!checkid(prevstate)) goto errexit;
 100:                 }
 101:             } elsif ( strcmp(keyword, LOCKER)==0 ) {
 102:                 getval(prevlocker,IDLENGTH,true);
 103:             } elsif ( strcmp(keyword, LOG)==0 ) {
 104:                 getval(prevsource,NCPPN,true);
 105:             } elsif (strcmp(keyword, REVISION)==0 ) {
 106:                 if (getval(prevrev,revlength,true))
 107:                     if (!checknum(prevrev,-1)) {
 108:                         error("Bad revision number");
 109:                         goto errexit;
 110:                     }
 111:             } elsif (strcmp(keyword, SOURCE)==0 ) {
 112:                 getval(prevsource,NCPPN,true);
 113:             } elsif ( strcmp(keyword, STATE)==0 ) {
 114:                 if (getval(prevstate,IDLENGTH,true))
 115:                     if (!checkid(prevstate)) goto errexit;
 116:             } else {
 117:                continue;
 118:             }
 119:             if (getc(fp)!=KDELIM)
 120:                 warn("Closing %c missing on keyword",KDELIM);
 121:             if (prevauthor[0]!='\0'&&prevrev[0]!='\0'&&prevstate[0]!='\0'&&
 122:                 prevdate[0]!='\0' && prevsource[0]!='\0') {
 123:                 /* done; prevlocker is irrelevant */
 124:                 break;
 125:            }
 126:         }
 127:     }
 128:     fclose(fp);
 129:     return true;
 130: 
 131: errexit:
 132:     prevauthor[0]=prevsource[0]=prevstate[0]=prevdate[0]=prevrev[0]= '\0';
 133:     fclose(fp); return false;
 134: }
 135: 
 136: 
 137: getval(target,maxchars,optional)
 138: char * target; int maxchars, optional;
 139: /* Function: Places a keyword value into target, but not more
 140:  * than maxchars characters. Prints an error if optiona==false
 141:  * and there is no keyword. Returns true if one is found, false otherwise.
 142:  */
 143: {   register char * tp;
 144:     register int c;
 145: 
 146:     tp=target;
 147:     c=getc(fp);
 148:     if (c==KDELIM) {
 149:         if (!optional)
 150:             error("Missing keyword value");
 151:         ungetc(c,fp);
 152:         return false;
 153:     } else {
 154:         while (!(c==' '||c=='\n'||c=='\t'||c==KDELIM||c==EOF)) {
 155:             if (tp-target>=maxchars-1) {
 156:                 error("keyword value too long");
 157:                 return false;
 158:             } else {
 159:                 *tp++ =c;
 160:                 c=getc(fp);
 161:             }
 162:         }
 163:         *tp= '\0';
 164: #       ifdef GETOLDTEST
 165:         printf("getval: %s\n",target);
 166: #       endif
 167:         while(c==' '||c=='\t') c=getc(fp); /* skip trailing blanks */
 168:     }
 169:     ungetc(c,fp);
 170:     return true;
 171: }
 172: 
 173: 
 174: int getprevdate(optional)
 175: int optional;
 176: /* Function: reads a date prevdate; checks format
 177:  * If there is not date and optional==false, an error is printed.
 178:  * Returns false on error, true otherwise.
 179:  */
 180: {   char prevday[10];
 181:     char prevtime[10];
 182: 
 183:     prevday[0]=prevtime[0]='\0';
 184:     if (!getval(prevday,9,optional)) return optional;
 185:     if (!getval(prevtime,9,false)) return false;
 186:     /*process date */
 187:     prevday[2]=prevday[5]=prevday[8]=prevtime[2]=prevtime[5]='.';
 188:     prevday[9]='\0';
 189:     strcpy(prevdate,prevday);
 190:     strcat(prevdate,prevtime);
 191:     if (!checknum(prevdate,5)) {
 192:             error("Bad date: %s",prevdate);
 193:             prevdate[0]='\0';
 194:             return false;
 195:     }
 196:     return true;
 197: }
 198: 
 199: int checknum(sp,fields)
 200: register char * sp; int fields;
 201: {    register int dotcount;
 202:      if (sp==nil||*sp=='\0') return true;
 203:      dotcount=0;
 204:      while(*sp) {
 205:         if (*sp=='.') dotcount++;
 206:         elsif (ctab[*sp]!=DIGIT) return false;
 207:         sp++;
 208:      }
 209:      if (fields >= 0 && dotcount!=fields) return false;
 210:      return true;
 211: }
 212: 
 213: 
 214: 
 215: #ifdef GETOLDTEST
 216: cleanup(){} /* dummy */
 217: 
 218: main(argc, argv)
 219: int  argc; char  *argv[];
 220: {
 221:         cmdid="getoldkeys";
 222:         while (*(++argv)) {
 223:                 if (getoldkeys(*argv))
 224:                 printf("%s:  revision: %s, date: %s, author: %s, state: %s\n",
 225:                         *argv, prevrev, prevdate, prevauthor,prevstate);
 226:         }
 227: }
 228: #endif

Defined functions

Defined variables

Defined macros