54 lines
1.2 KiB
C
54 lines
1.2 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 <ip.h>
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#include <ndb.h>
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/*
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* Look for a pair with the given attribute. look first on the same line,
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* then in the whole entry.
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*/
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Ndbtuple*
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ndbfindattr(Ndbtuple *entry, Ndbtuple *line, char *attr)
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{
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Ndbtuple *nt;
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/* first look on same line (closer binding) */
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for(nt = line; nt;){
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if(strcmp(attr, nt->attr) == 0)
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return nt;
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nt = nt->line;
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if(nt == line)
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break;
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}
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/* search whole tuple */
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for(nt = entry; nt; nt = nt->entry)
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if(strcmp(attr, nt->attr) == 0)
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return nt;
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return nil;
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}
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Ndbtuple*
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ndblookval(Ndbtuple *entry, Ndbtuple *line, char *attr, char *to)
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{
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Ndbtuple *t;
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t = ndbfindattr(entry, line, attr);
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if(t != nil){
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strncpy(to, t->val, Ndbvlen-1);
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to[Ndbvlen-1] = 0;
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}
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return t;
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}
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