ref: 7c5ca77a6e4d442b4c026e2cd9e483a692f65def
dir: /sys/src/libndb/ndblookval.c/
#include <u.h> #include <libc.h> #include <bio.h> #include <ip.h> #include <ndb.h> /* * Look for a pair with the given attribute. look first on the same line, * then in the whole entry. */ Ndbtuple* ndbfindattr(Ndbtuple *entry, Ndbtuple *line, char *attr) { Ndbtuple *nt; /* first look on same line (closer binding) */ for(nt = line; nt;){ if(strcmp(attr, nt->attr) == 0) return nt; nt = nt->line; if(nt == line) break; } /* search whole tuple */ for(nt = entry; nt; nt = nt->entry) if(strcmp(attr, nt->attr) == 0) return nt; return nil; } Ndbtuple* ndblookval(Ndbtuple *entry, Ndbtuple *line, char *attr, char *to) { Ndbtuple *t; t = ndbfindattr(entry, line, attr); if(t != nil){ strncpy(to, t->val, Ndbvlen-1); to[Ndbvlen-1] = 0; } return t; }