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author | Michael Drake <tlsa@netsurf-browser.org> | 2021-03-31 21:01:54 +0100 |
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committer | Michael Drake <tlsa@netsurf-browser.org> | 2021-04-06 09:03:19 +0100 |
commit | c06164add4d44baad937ee9abcd110a46b7944ba (patch) | |
tree | 55ddf14ec14721125a96382de0093ede23b6882f | |
parent | f1e0c5c5bbb01ab9747b9bd0113e6598bcc5025a (diff) | |
download | libnsgif-c06164add4d44baad937ee9abcd110a46b7944ba.tar.gz libnsgif-c06164add4d44baad937ee9abcd110a46b7944ba.tar.bz2 |
lzw: Slight simplification of clear code handling.
-rw-r--r-- | src/lzw.c | 8 |
1 files changed, 4 insertions, 4 deletions
@@ -232,9 +232,9 @@ static lzw_result lzw__clear_codes( uint8_t *stack_pos; /* Reset dictionary building context */ - ctx->current_code_size = ctx->initial_code_size + 1; - ctx->current_code_size_max = (1 << ctx->current_code_size) - 1; - ctx->current_entry = (1 << ctx->initial_code_size) + 2; + ctx->current_code_size = ctx->initial_code_size; + ctx->current_code_size_max = (1 << ctx->initial_code_size) - 1; + ctx->current_entry = ctx->eoi_code + 1; /* There might be a sequence of clear codes, so process them all */ do { @@ -288,7 +288,7 @@ lzw_result lzw_decode_init( ctx->input.sb_bit_count = 0; /* Initialise the dictionary building context */ - ctx->initial_code_size = code_size; + ctx->initial_code_size = code_size + 1; ctx->clear_code = (1 << code_size) + 0; ctx->eoi_code = (1 << code_size) + 1; |