105 lines
1.9 KiB
C
105 lines
1.9 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <bio.h>
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#include <chartypes.h>
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#include <ndb.h>
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#include "ndbhf.h"
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/*
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* parse a single tuple
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*/
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char*
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_ndbparsetuple(char *cp, Ndbtuple **tp)
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{
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char *p;
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int len;
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Ndbtuple *t;
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/* a '#' starts a comment lasting till new line */
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EATWHITE(cp);
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if(*cp == '#' || *cp == '\n')
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return 0;
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t = ndbnew(nil, nil);
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setmalloctag(t, getcallerpc());
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*tp = t;
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/* parse attribute */
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p = cp;
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while(*cp != '=' && !ISWHITE(*cp) && *cp != '\n')
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cp++;
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len = cp - p;
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if(len >= Ndbalen)
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len = Ndbalen-1;
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strncpy(t->attr, p, len);
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/* parse value */
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EATWHITE(cp);
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if(*cp == '='){
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cp++;
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if(*cp == '"'){
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p = ++cp;
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while(*cp != '\n' && *cp != '"')
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cp++;
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len = cp - p;
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if(*cp == '"')
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cp++;
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} else if(*cp == '#'){
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len = 0;
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} else {
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p = cp;
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while(!ISWHITE(*cp) && *cp != '\n')
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cp++;
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len = cp - p;
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}
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ndbsetval(t, p, len);
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}
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return cp;
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}
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/*
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* parse all tuples in a line. we assume that the
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* line ends in a '\n'.
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*
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* the tuples are linked as a list using ->entry and
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* as a ring using ->line.
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*/
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Ndbtuple*
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_ndbparseline(char *cp)
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{
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Ndbtuple *t;
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Ndbtuple *first, *last;
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first = last = 0;
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while(*cp != '#' && *cp != '\n'){
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t = 0;
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cp = _ndbparsetuple(cp, &t);
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if(cp == 0)
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break;
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if(first){
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last->line = t;
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last->entry = t;
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} else
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first = t;
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last = t;
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t->line = 0;
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t->entry = 0;
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setmalloctag(t, getcallerpc());
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}
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if(first)
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last->line = first;
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ndbsetmalloctag(first, getcallerpc());
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return first;
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}
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