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lzw: Slight simplification of clear code handling.

This commit is contained in:
Michael Drake 2021-03-31 21:01:54 +01:00 committed by Michael Drake
parent eb07e204e7
commit ac2d57c288
1 changed files with 4 additions and 4 deletions
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8
libvips/foreign/libnsgif/lzw.c
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@ -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;