-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <openssl/objects.h>
-#include <openssl/comp.h>
-
-static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
- unsigned int olen, unsigned char *in,
- unsigned int ilen);
-static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
- unsigned int olen, unsigned char *in,
- unsigned int ilen);
-
-static COMP_METHOD rle_method = {
- NID_rle_compression,
- LN_rle_compression,
- NULL,
- NULL,
- rle_compress_block,
- rle_expand_block,
- NULL,
- NULL,
-};
-
-COMP_METHOD *COMP_rle(void)
-{
- return (&rle_method);
-}
-
-static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
- unsigned int olen, unsigned char *in,
- unsigned int ilen)
-{
- /* int i; */
-
- if (olen < (ilen + 1)) {
- /* ZZZZZZZZZZZZZZZZZZZZZZ */
- return (-1);
- }
-
- *(out++) = 0;
- memcpy(out, in, ilen);
- return (ilen + 1);
-}
-
-static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
- unsigned int olen, unsigned char *in,
- unsigned int ilen)
-{
- int i;
-
- if (ilen == 0 || olen < (ilen - 1)) {
- /* ZZZZZZZZZZZZZZZZZZZZZZ */
- return (-1);
- }
-
- i = *(in++);
- if (i == 0) {
- memcpy(out, in, ilen - 1);
- }
- return (ilen - 1);
-}