Giacomo Tesio
e70feee4a3
With this commit all functions declared in libc.h have been renamed with the "jehanne_" prefix. This is done for several reason: - it removes conflicts during symbol resolution when linking standard C libraries like newlib or musl - it allows programs depending on a standard C library to directly link to a library depending on our non standard libc (eg libsec). To ease transiction two files are provided: - sys/include/lib9.h that can be included instead of <libc.h> to use the old names (via a simple set of macros) - sys/src/lib/c/lib9.c that can be compiled with a program where the macro provided by lib9.h are too dumb (see for example rc or grep). In the kernel port/lib.h has been modified accordingly and some of the functions it directly provides has been renamed too (eg malloc in qmalloc.c and print in devcons.c).
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/*
|
|
* 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 "ndb.h"
|
|
|
|
/*
|
|
* search for a tuple that has the given 'attr=val' and also 'rattr=x'.
|
|
* copy 'x' into 'buf' and return the whole tuple.
|
|
*
|
|
* return 0 if not found.
|
|
*/
|
|
char*
|
|
ndbgetvalue(Ndb *db, Ndbs *s, char *attr, char *val, char *rattr,
|
|
Ndbtuple **pp)
|
|
{
|
|
Ndbtuple *t, *nt;
|
|
char *rv;
|
|
Ndbs temps;
|
|
|
|
if(s == nil)
|
|
s = &temps;
|
|
if(pp)
|
|
*pp = nil;
|
|
t = ndbsearch(db, s, attr, val);
|
|
while(t){
|
|
/* first look on same line (closer binding) */
|
|
nt = s->t;
|
|
for(;;){
|
|
if(strcmp(rattr, nt->attr) == 0){
|
|
rv = strdup(nt->val);
|
|
if(pp != nil)
|
|
*pp = t;
|
|
else
|
|
ndbfree(t);
|
|
return rv;
|
|
}
|
|
nt = nt->line;
|
|
if(nt == s->t)
|
|
break;
|
|
}
|
|
/* search whole tuple */
|
|
for(nt = t; nt; nt = nt->entry){
|
|
if(strcmp(rattr, nt->attr) == 0){
|
|
rv = strdup(nt->val);
|
|
if(pp != nil)
|
|
*pp = t;
|
|
else
|
|
ndbfree(t);
|
|
return rv;
|
|
}
|
|
}
|
|
ndbfree(t);
|
|
t = ndbsnext(s, attr, val);
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
Ndbtuple*
|
|
ndbgetval(Ndb *db, Ndbs *s, char *attr, char *val, char *rattr,
|
|
char *buf)
|
|
{
|
|
Ndbtuple *t;
|
|
char *p;
|
|
|
|
p = ndbgetvalue(db, s, attr, val, rattr, &t);
|
|
if(p == nil){
|
|
if(buf != nil)
|
|
*buf = 0;
|
|
} else {
|
|
if(buf != nil){
|
|
strncpy(buf, p, Ndbvlen-1);
|
|
buf[Ndbvlen-1] = 0;
|
|
}
|
|
free(p);
|
|
}
|
|
ndbsetmalloctag(t, getcallerpc());
|
|
return t;
|
|
}
|