From 2f22a35e843a24f0ad5f31644133d64648fe4efc Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Mon, 12 Aug 2019 18:25:52 +0200 Subject: Add deep-copy function to compressor interface Signed-off-by: David Oberhollenzer --- lib/comp/lzo.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'lib/comp/lzo.c') diff --git a/lib/comp/lzo.c b/lib/comp/lzo.c index 98cc200..66c2f59 100644 --- a/lib/comp/lzo.c +++ b/lib/comp/lzo.c @@ -177,6 +177,22 @@ static ssize_t lzo_uncomp_block(compressor_t *base, const uint8_t *in, return len; } +static compressor_t *lzo_create_copy(compressor_t *cmp) +{ + lzo_compressor_t *other = (lzo_compressor_t *)cmp; + lzo_compressor_t *lzo; + + lzo = calloc(1, sizeof(*lzo) + lzo_algs[other->algorithm].bufsize); + + if (lzo == NULL) { + perror("creating additional lzo compressor"); + return NULL; + } + + memcpy(lzo, other, sizeof(*lzo)); + return (compressor_t *)lzo; +} + static void lzo_destroy(compressor_t *base) { free(base); @@ -281,6 +297,7 @@ compressor_t *create_lzo_compressor(bool compress, size_t block_size, base->do_block = compress ? lzo_comp_block : lzo_uncomp_block; base->write_options = lzo_write_options; base->read_options = lzo_read_options; + base->create_copy = lzo_create_copy; return base; } -- cgit v1.2.3