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Annotation of 43BSDReno/lib/libpc/READE.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1979 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)READE.c    1.8 (Berkeley) 4/9/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #include "h00vars.h"
        !            25: 
        !            26: long
        !            27: READE(curfile, name)
        !            28: 
        !            29:        register struct iorec   *curfile;
        !            30:        char                    *name;
        !            31: {
        !            32:        register short  *sptr;
        !            33:        register int    len;
        !            34:        register int    nextlen;
        !            35:        register int    cnt;
        !            36:        char            *cp;
        !            37:        char            namebuf[NAMSIZ];
        !            38:        int             retval;
        !            39: 
        !            40:        if (curfile->funit & FWRITE) {
        !            41:                ERROR("%s: Attempt to read, but open for writing\n",
        !            42:                        curfile->pfname);
        !            43:        }
        !            44:        UNSYNC(curfile);
        !            45:        retval = fscanf(curfile->fbuf,
        !            46:            "%*[ \t\n]%74[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]",
        !            47:            namebuf);
        !            48:        if (retval == EOF) {
        !            49:                ERROR("%s: Tried to read past end of file\n", curfile->pfname);
        !            50:        }
        !            51:        if (retval == 0)
        !            52:                goto ename;
        !            53:        for (len = 0; len < NAMSIZ && namebuf[len]; len++)
        !            54:                /* void */;
        !            55:        len++;
        !            56:        sptr = (short *)name;
        !            57:        cnt = *sptr++;
        !            58:        cp = name + sizeof (short) + *sptr;
        !            59:        do      {
        !            60:                nextlen = *sptr++;
        !            61:                nextlen = *sptr - nextlen;
        !            62:                if (nextlen == len && RELEQ(len, namebuf, cp)) {
        !            63:                        return *((short *) name) - cnt;
        !            64:                }
        !            65:                cp += (int)nextlen;
        !            66:        } while (--cnt);
        !            67: ename:
        !            68:        ERROR("Unknown name \"%s\" found on enumerated type read\n", namebuf);
        !            69:        return 0;
        !            70: }

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