int
zlib_compress_chunk_part(const void *buf, gsize bufsize, GByteArray *result, gulong* checksum)
{
guint8* out = NULL;
gulong bufsize_ulong = bufsize;
gulong out_max;
int r = 0;
/* Sanity check */
if(!result) {
ERROR("Invalid parameter : %p", result);
return 1;
}
out_max = get_working_buffer_size(bufsize);
out = g_malloc0(out_max);
*checksum = adler32(*checksum, buf, bufsize_ulong);
if (buf == NULL || out == NULL){
r = 1;
goto err;
}
/* compress block */
r = compress(out, &out_max, buf, bufsize_ulong);
if (r != Z_OK){
/* this should NEVER happen */
ERROR("internal error - compression failed");
r = 2;
goto err;
}
#define DATA_APPEND(D, S) g_byte_array_append(result, (guint8*)D, S);
/* write uncompressed block size */
result = DATA_APPEND(&bufsize_ulong, sizeof(gulong));
if (out_max < bufsize_ulong) {
/* write compressed block */
result = DATA_APPEND(&out_max, sizeof(gulong));
result = DATA_APPEND(out, out_max);
}
else {
/* not compressible - write uncompressed block */
result = DATA_APPEND(&bufsize, sizeof(gulong));
result = DATA_APPEND(buf, bufsize);
}
r = 0;
err:
if (out)
g_free(out);
return r;
}
int
lzo_compress_chunk_part(const void *buf, gsize bufsize, GByteArray *result, gulong* checksum)
{
lzo_bytep out = NULL;
lzo_uint out_len = 0;
gsize out_max;
lzo_bytep wrkmem = NULL;
lzo_uint wrk_len = 0;
int r = 0;
/* Sanity check */
if(!result) {
ERROR("Invalid parameter : %p", result);
return 1;
}
out_max = get_working_buffer_size(bufsize);
out = g_malloc0(out_max);
lzo_uint tmp = bufsize;
lzo_uint32 checksum32 = 0;
checksum32 = *checksum;
checksum32 = lzo_adler32(checksum32, buf, tmp);
*checksum = checksum32;
wrk_len = LZO1X_1_MEM_COMPRESS;
wrkmem = (lzo_bytep) g_malloc0(wrk_len);
if (buf == NULL || out == NULL || wrkmem == NULL){
DEBUG("out of memory\n");
r = 1;
goto err;
}
/* compress block */
r = lzo1x_1_compress(buf, bufsize, out, &out_len, wrkmem);
if (r != LZO_E_OK || out_len > out_max){
/* this should NEVER happen */
DEBUG("internal error - compression failed\n");
r = 2;
goto err;
}
#define DATA_APPEND(D, S) g_byte_array_append(result, (guint8*)D, S);
/* write uncompressed block size */
result = DATA_APPEND(&bufsize, sizeof(lzo_uint));
if (out_len < bufsize) {
/* write compressed block */
result = DATA_APPEND(&out_len, sizeof(lzo_uint));
result = DATA_APPEND(out, out_len);
out = NULL;
}
else {
/* not compressible - write uncompressed block */
result = DATA_APPEND(&bufsize, sizeof(lzo_uint));
result = DATA_APPEND(buf, bufsize);
}
r = 0;
err:
g_free(wrkmem);
if (out)
g_free(out);
return r;
}
