libmariadb/libmariadb/ma_compress.c

33 my_bool _mariadb_compress(unsigned char *packet, size_t *len, size_t *complen)
36     *complen=0;
39     unsigned char *compbuf=_mariadb_compress_alloc(packet,len,complen);
41       return *complen ? 0 : 1;
49 unsigned char *_mariadb_compress_alloc(const unsigned char *packet, size_t *len, size_t *complen)
52   *complen =  *len * 120 / 100 + 12;
53   if (!(compbuf = (unsigned char *) malloc(*complen)))
55   if (compress((Bytef*) compbuf,(ulong *) complen, (Bytef*) packet,
61   if (*complen >= *len)
63     *complen=0;
67   swap(size_t,*len,*complen);			/* *len is now packet length */
71 my_bool _mariadb_uncompress (unsigned char *packet, size_t *len, size_t *complen)
73   if (*complen)					/* If compressed */
75     unsigned char *compbuf = (unsigned char *) malloc (*complen);
78     if (uncompress((Bytef*) compbuf, (uLongf *)complen, (Bytef*) packet, (uLongf)*len) != Z_OK)
83     *len = *complen;
87   else *complen= *len;