4.3BSD - /usr/src/usr.lib/libpc/READE.c

   1: /* Copyright (c) 1979 Regents of the University of California */
   2: 
   3: static char sccsid[] = "@(#)READE.c 1.6 10/28/83";
   4: 
   5: #include "h00vars.h"
   6: 
   7: long
   8: READE(curfile, name)
   9: 
  10:     register struct iorec   *curfile;
  11:     char            *name;
  12: {
  13:     register short  *sptr;
  14:     register int    len;
  15:     register int    nextlen;
  16:     register int    cnt;
  17:     char        *cp;
  18:     char        namebuf[NAMSIZ];
  19:     int     retval;
  20: 
  21:     if (curfile->funit & FWRITE) {
  22:         ERROR("%s: Attempt to read, but open for writing\n",
  23:             curfile->pfname);
  24:         return;
  25:     }
  26:     UNSYNC(curfile);
  27:     retval = fscanf(curfile->fbuf,
  28:         "%*[ \t\n]%74[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]",
  29:         namebuf);
  30:     if (retval == EOF) {
  31:         ERROR("%s: Tried to read past end of file\n", curfile->pfname);
  32:         return;
  33:     }
  34:     if (retval == 0)
  35:         goto ename;
  36:     for (len = 0; len < NAMSIZ && namebuf[len]; len++)
  37:         /* void */;
  38:     len++;
  39:     sptr = (short *)name;
  40:     cnt = *sptr++;
  41:     cp = name + sizeof (short) + *sptr;
  42:     do  {
  43:         nextlen = *sptr++;
  44:         nextlen = *sptr - nextlen;
  45:         if (nextlen == len && RELEQ(len, namebuf, cp)) {
  46:             return *((short *) name) - cnt;
  47:         }
  48:         cp += (int)nextlen;
  49:     } while (--cnt);
  50: ename:
  51:     ERROR("Unknown name \"%s\" found on enumerated type read\n", namebuf);
  52: }

Defined functions

Defined variables