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#include <u.h>
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#include <libc.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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}