jehanne/sys/src/lib/ndb/ndbfree.c

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/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <lib9.h>
#include <bio.h>
#include <chartypes.h>
#include <ndb.h>
#include "ndbhf.h"
/*
* free a parsed entry
*/
void
ndbfree(Ndbtuple *t)
{
Ndbtuple *tn;
for(; t; t = tn){
tn = t->entry;
if(t->val != t->valbuf){
free(t->val);
}
free(t);
}
}
/*
* set a value in a tuple
*/
void
ndbsetval(Ndbtuple *t, char *val, int n)
{
if(n < Ndbvlen){
if(t->val != t->valbuf){
free(t->val);
t->val = t->valbuf;
}
} else {
if(t->val != t->valbuf)
t->val = realloc(t->val, n+1);
else
t->val = malloc(n+1);
if(t->val == nil)
sysfatal("ndbsetval %r");
}
strncpy(t->val, val, n);
t->val[n] = 0;
}
/*
* allocate a tuple
*/
Ndbtuple*
ndbnew(char *attr, char *val)
{
Ndbtuple *t;
t = mallocz(sizeof(*t), 1);
if(t == nil)
sysfatal("ndbnew %r");
if(attr != nil)
strncpy(t->attr, attr, sizeof(t->attr)-1);
t->val = t->valbuf;
if(val != nil)
ndbsetval(t, val, strlen(val));
ndbsetmalloctag(t, getcallerpc());
return t;
}
/*
* set owner of a tuple
*/
void
ndbsetmalloctag(Ndbtuple *t, uintptr_t tag)
{
for(; t; t=t->entry)
setmalloctag(t, tag);
}