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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-12 18:25:52 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-16 16:47:24 +0200
commit2f22a35e843a24f0ad5f31644133d64648fe4efc (patch)
tree7175b11355ea988c022d7e87b27f6676c5d2d181 /lib/comp/zstd.c
parent008990af4d8b0cfa03fcb2c5fa2ba461dad71b18 (diff)
Add deep-copy function to compressor interface
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/comp/zstd.c')
-rw-r--r--lib/comp/zstd.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/comp/zstd.c b/lib/comp/zstd.c
index 252e1bf..e206338 100644
--- a/lib/comp/zstd.c
+++ b/lib/comp/zstd.c
@@ -88,6 +88,29 @@ static ssize_t zstd_uncomp_block(compressor_t *base, const uint8_t *in,
return ret;
}
+static compressor_t *zstd_create_copy(compressor_t *cmp)
+{
+ zstd_compressor_t *zstd = malloc(sizeof(*zstd));
+
+ if (zstd == NULL) {
+ perror("creating additional zstd compressor");
+ return NULL;
+ }
+
+ memcpy(zstd, cmp, sizeof(*zstd));
+
+ zstd->zctx = ZSTD_createCCtx();
+
+ if (zstd->zctx == NULL) {
+ fputs("error creating addtional zstd compression context\n",
+ stderr);
+ free(zstd);
+ return NULL;
+ }
+
+ return (compressor_t *)zstd;
+}
+
static void zstd_destroy(compressor_t *base)
{
zstd_compressor_t *zstd = (zstd_compressor_t *)base;
@@ -141,6 +164,7 @@ compressor_t *create_zstd_compressor(bool compress, size_t block_size,
base->do_block = compress ? zstd_comp_block : zstd_uncomp_block;
base->write_options = zstd_write_options;
base->read_options = zstd_read_options;
+ base->create_copy = zstd_create_copy;
return base;
fail_level:
fprintf(stderr, "zstd compression level must be a number in the range "