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refactor, libc made optional

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veclavtlica
2026-09-14 12:21:49 +03:00
parent 26f6ba56e9
commit 1125073568
14 changed files with 178 additions and 152 deletions
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Common/lzw.c
+13 -17
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@@ -5,17 +5,11 @@
#include "lzw.h"
#include "bits.h"
#include "std.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#ifndef COM_DEF_NOSTD
#include <assert.h>
#include <stdlib.h>
#else
#include "std.h"
#endif
/* References: */
/* https://www.w3.org/Graphics/GIF/spec-gif89a.txt */
/* https://www.daubnet.com/en/file-format-gif */
@@ -50,8 +44,9 @@ struct com_lzw_table com_lzw_infer_table(const char *datain, uint32_t sizein) {
if (!code_found) {
if (table_size >= table_cap) {
/* TODO: Ref to prev table gets missed, memory leak scenario */
if (!(table = realloc(table, sizeof(struct com_lzw_table_entry) *
(table_cap + COM_LZW_TABLE_CAP_GROW))))
if (!(table = com_std_realloc(
table, sizeof(struct com_lzw_table_entry) *
(table_cap + COM_LZW_TABLE_CAP_GROW))))
goto ERR_ALLOC_INIT_TABLE;
table_cap += COM_LZW_TABLE_CAP_GROW;
@@ -73,14 +68,14 @@ struct com_lzw_table com_lzw_infer_table(const char *datain, uint32_t sizein) {
ERR_ALLOC_INIT_TABLE:
if (table_cap > 0)
free(table);
com_std_free(table);
return (struct com_lzw_table){0};
}
void com_lzw_free_table(struct com_lzw_table *table) {
if (!table->table)
return;
free(table->table);
com_std_free(table->table);
table->size = 0;
table->cap = 0;
table->init_size = 0;
@@ -89,14 +84,14 @@ void com_lzw_free_table(struct com_lzw_table *table) {
/* For GIFs, color should already be collapsed to indices at this point */
bool com_lzw_compress(const struct com_lzw_table *table, const char *datain,
uint32_t sizein, char **dataout, uint32_t *sizeout) {
assert(datain && dataout && sizeout && sizein > 0);
assert(*dataout == NULL && *sizeout == 0);
com_std_assert(datain && dataout && sizeout && sizein > 0);
com_std_assert(*dataout == NULL && *sizeout == 0);
/* TODO: Make sure the table is cleared */
/* Encode step */
uint8_t codesize = com_bits_needed(table->init_size) + 1;
assert(codesize < COM_TABLE_BIT_WIDTH_LIMIT);
com_std_assert(codesize < COM_TABLE_BIT_WIDTH_LIMIT);
uint32_t cur_table_idx =
0; /* Head table in which vector we should be looking into */
@@ -131,12 +126,13 @@ bool com_lzw_compress(const struct com_lzw_table *table, const char *datain,
// }
/* Emit output, drop the string */
assert(cur_table_idx < (1 << codesize));
assert(cur_table_idx < table->size);
com_std_assert(cur_table_idx < (1 << codesize));
com_std_assert(cur_table_idx < table->size);
if (output_size == output_cap && output_bitshift + codesize > 8) {
/* TODO: catch alloc failure */
output = realloc(output, output_cap + COM_LZW_OUTPUT_CAP_GROWTH);
output =
com_std_realloc(output, output_cap + COM_LZW_OUTPUT_CAP_GROWTH);
output_cap += COM_LZW_OUTPUT_CAP_GROWTH;
}