int
zlib_write_compress_header(FILE *fd, guint32 blocksize, gulong *checksum, guint32 *compressed_size)
{
gsize written = 0;
GByteArray *headers = NULL;
int status = 1;
headers = g_byte_array_new();
#define HEADER_APPEND(V, S) g_byte_array_append(headers,(guint8*)V, S);
headers = HEADER_APPEND(&magic, sizeof(magic)); /* char[8] */
headers = HEADER_APPEND(&blocksize, sizeof(blocksize)); /* guint32 */
written = fwrite(headers->data, headers->len, 1, fd);
if (written != 1) {
DEBUG("Failed to write compression headers");
goto end;
}
*compressed_size = *compressed_size + headers->len;
*checksum = adler32(0, NULL, 0);
status = 0;
end:
if(headers)
g_byte_array_free(headers, TRUE);
return status;
}
int
lzo_write_compress_header(FILE *file, lzo_uint32 blocksize, gulong *checksum, lzo_uint32 *compressed_size)
{
lzo_uint32 flags = LZO_FLAG_CHECKSUM; /* do compute a checksum */
char method = LZO_METHOD;
char level = LZO_LEVEL;
gsize written = 0;
GByteArray *headers = NULL;
headers = g_byte_array_new();
#define HEADER_APPEND(V, S) g_byte_array_append(headers,(guint8*)V, S);
headers = HEADER_APPEND(&lzo_magic, sizeof(lzo_magic)); /* char[7] */
headers = HEADER_APPEND(&flags, sizeof(flags)); /* guint32 */
headers = HEADER_APPEND(&method, sizeof(method)); /* char */
headers = HEADER_APPEND(&level, sizeof(level)); /* char */
headers = HEADER_APPEND(&blocksize, sizeof(blocksize)); /* guint32 */
written = fwrite(headers->data, headers->len, 1, file);
if (written != 1) {
ERROR("Failed to write headers\n");
if(headers)
g_byte_array_free(headers, TRUE);
return 1;
}
*compressed_size = *compressed_size + headers->len;
lzo_uint32 cheksum32 = 0;
cheksum32 = lzo_adler32(0, NULL, 0);
*checksum = cheksum32;
if(headers)
g_byte_array_free(headers, TRUE);
return 0;
}
