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Annotation of 40BSD/lib/libpc/READE.c, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1979 Regents of the University of California */
                      2: 
                      3: static char sccsid[] = "@(#)READE.c 1.1 10/29/80";
                      4: 
                      5: #include "h00vars.h"
                      6: #include "h01errs.h"
                      7: 
                      8: READE(curfile, name)
                      9: 
                     10:        register struct iorec   *curfile;
                     11:        char                    *name;
                     12: {
                     13:        long                    data;
                     14: 
                     15:        register short  *sptr;
                     16:        register int    len;
                     17:        register int    nextlen;
                     18:        register int    cnt;
                     19:        char            *cp;
                     20:        char            namebuf[NAMSIZ];
                     21: 
                     22:        if (curfile->funit & FWRITE) {
                     23:                ERROR(EREADIT, curfile->pfname);
                     24:                return;
                     25:        }
                     26:        UNSYNC(curfile);
                     27:        if (fscanf(curfile->fbuf,
                     28:            "%*[ \t\n]%74[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]",
                     29:            namebuf) == 0) {
                     30:                ERROR(ENUMNTFD, namebuf);
                     31:                return;
                     32:        }
                     33:        curfile->funit |= SYNC;
                     34:        for (len = 0; len < NAMSIZ && namebuf[len]; len++)
                     35:                /* void */;
                     36:        len++;
                     37:        sptr = (short *)name;
                     38:        cnt = *sptr++;
                     39:        cp = name + sizeof (short) + *sptr;
                     40:        do      {
                     41:                nextlen = *sptr++;
                     42:                nextlen = *sptr - nextlen;
                     43:                if (nextlen == len && RELEQ(len, namebuf, cp)) {
                     44:                        return *((short *) name) - cnt;
                     45:                }
                     46:                cp += nextlen;
                     47:        } while (--cnt);
                     48:        ERROR(ENUMNTFD, namebuf);
                     49: }

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