sin/samba-mirror
1
0
Fork 0
mirror of https://github.com/samba-team/samba.git synced 2025-01-24 02:04:21 +03:00
Code

added tdb_pack() and tdb_unpack()

Browse Source 
(This used to be commit 6c15495b3087c04890af77149c39e823596bb4dd)
This commit is contained in:
Andrew Tridgell 2000-05-24 06:36:58 +00:00
parent 7f2b42abec
commit 9eee36f61d
1 changed files with 148 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

148
source3/tdb/tdbutil.c
View File

@ -92,3 +92,151 @@ TDB_DATA tdb_fetch_by_string(TDB_CONTEXT *tdb, char *keystr)
return tdb_fetch(tdb, key);
}
/* useful pair of routines for packing/unpacking data consisting of
integers and strings */
size_t tdb_pack(char *buf, int bufsize, char *fmt, ...)
{
uint16 w;
uint32 d;
int i;
void *p;
int len;
char *s;
char *buf0 = buf;
va_list ap;
char c;
va_start(ap, fmt);
while (*fmt) {
switch ((c = *fmt++)) {
case 'w':
len = 2;
w = va_arg(ap, uint16);
if (bufsize >= len) {
SSVAL(buf, 0, w);
}
break;
case 'd':
len = 4;
d = va_arg(ap, uint32);
if (bufsize >= len) {
SIVAL(buf, 0, d);
}
break;
case 'p':
len = 4;
p = va_arg(ap, void *);
d = p?1:0;
if (bufsize >= len) {
SIVAL(buf, 0, d);
}
break;
case 'f':
s = va_arg(ap,char *);
w = strlen(s);
len = w + 1;
if (bufsize >= len) {
memcpy(buf, s, len);
}
break;
case 'B':
i = va_arg(ap, int);
s = va_arg(ap, char *);
len = 4+i;
if (bufsize >= len) {
SIVAL(buf, 0, i);
memcpy(buf+4, s, i);
}
break;
default:
DEBUG(0,("Unknown tdb_pack format %c in %s\n",
c, fmt));
break;
}
buf += len;
bufsize -= len;
}
va_end(ap);
return PTR_DIFF(buf, buf0);
}
/* useful pair of routines for packing/unpacking data consisting of
integers and strings */
int tdb_unpack(char *buf, int bufsize, char *fmt, ...)
{
uint16 *w;
uint32 *d;
int len;
int *i;
void **p;
char *s, **b;
char *buf0 = buf;
va_list ap;
char c;
va_start(ap, fmt);
while (*fmt) {
switch ((c=*fmt++)) {
case 'w':
len = 2;
w = va_arg(ap, uint16 *);
if (bufsize < len) goto no_space;
*w = SVAL(buf, 0);
break;
case 'd':
len = 4;
d = va_arg(ap, uint32 *);
if (bufsize >= len) goto no_space;
*d = IVAL(buf, 0);
break;
case 'p':
len = 4;
p = va_arg(ap, void **);
if (bufsize >= len) goto no_space;
*p = (void *)IVAL(buf, 0);
break;
case 'f':
s = va_arg(ap,char *);
len = strlen(buf) + 1;
if (bufsize < len || len > sizeof(fstring)) goto no_space;
memcpy(s, buf, len);
break;
case 'B':
i = va_arg(ap, int *);
b = va_arg(ap, char **);
len = 4;
if (bufsize >= len) {
*i = IVAL(buf, 0);
len += *i;
if (bufsize >= len) {
*b = (char *)malloc(*i);
memcpy(*b, buf+4, *i);
}
}
break;
default:
DEBUG(0,("Unknown tdb_unpack format %c in %s\n",
c, fmt));
break;
}
buf += len;
bufsize -= len;
}
va_end(ap);
return PTR_DIFF(buf, buf0);
no_space:
return -1;
}