diff options
| -rw-r--r-- | source/tdb/tdbutil.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/source/tdb/tdbutil.c b/source/tdb/tdbutil.c index 2546b9d88c7..13934b54399 100644 --- a/source/tdb/tdbutil.c +++ b/source/tdb/tdbutil.c @@ -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; +} + + |