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http://git.netsurf-browser.org/libnsgif.git/shortlog/7149b17577f04f3c34d6e1c938eeaf88c06b10ad
...commit
http://git.netsurf-browser.org/libnsgif.git/commit/7149b17577f04f3c34d6e1c938eeaf88c06b10ad
...tree
http://git.netsurf-browser.org/libnsgif.git/tree/7149b17577f04f3c34d6e1c938eeaf88c06b10ad
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commitdiff
http://git.netsurf-browser.org/libnsgif.git/commit/?id=7149b17577f04f3c34d6e1c938eeaf88c06b10ad
commit 7149b17577f04f3c34d6e1c938eeaf88c06b10ad
Author: Michael Drake <[email protected]>
Commit: Michael Drake <[email protected]>
LZW decoder: Tiny optimisation.
When the next code fits exactly in what's left of the
current sub-block, we can use the fast path.
Spotted by Adrian Lees.
diff --git a/src/lzw.c b/src/lzw.c
index d65f77e..31cf7d4 100644
--- a/src/lzw.c
+++ b/src/lzw.c
@@ -163,7 +163,7 @@ static inline lzw_result lzw__next_code(
assert(byte_advance <= 2);
- if (ctx->sb_bit + code_size < ctx->sb_bit_count) {
+ if (ctx->sb_bit + code_size <= ctx->sb_bit_count) {
/* Fast path: code fully inside this sub-block */
const uint8_t *data = ctx->sb_data + (ctx->sb_bit >> 3);
switch (byte_advance) {
-----------------------------------------------------------------------
Summary of changes:
src/lzw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/lzw.c b/src/lzw.c
index d65f77e..31cf7d4 100644
--- a/src/lzw.c
+++ b/src/lzw.c
@@ -163,7 +163,7 @@ static inline lzw_result lzw__next_code(
assert(byte_advance <= 2);
- if (ctx->sb_bit + code_size < ctx->sb_bit_count) {
+ if (ctx->sb_bit + code_size <= ctx->sb_bit_count) {
/* Fast path: code fully inside this sub-block */
const uint8_t *data = ctx->sb_data + (ctx->sb_bit >> 3);
switch (byte_advance) {
--
NetSurf GIF Decoder
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