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AZTEC: lessen stack usage by sharing buffer between bit_pattern and binary_string

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gitlost 2020-12-18 03:05:08 +00:00
parent f09826b9a4
commit 0ef9fdf684
1 changed files with 4 additions and 1 deletions
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5
backend/aztec.c
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@ -870,7 +870,10 @@ static void populate_map(short AztecMap[]) {
INTERNAL int aztec(struct zint_symbol *symbol, unsigned char source[], int length) { INTERNAL int aztec(struct zint_symbol *symbol, unsigned char source[], int length) {
int x, y, i, j, p, data_blocks, ecc_blocks, layers, total_bits; int x, y, i, j, p, data_blocks, ecc_blocks, layers, total_bits;
char binary_string[AZTEC_BIN_CAPACITY + 1], bit_pattern[20045], descriptor[42]; char bit_pattern[20045]; /* Note 20045 > AZTEC_BIN_CAPACITY + 1 */
/* To lessen stack usage, share binary_string buffer with bit_pattern, as accessed separately */
char *binary_string = bit_pattern;
char descriptor[42];
char adjusted_string[AZTEC_MAX_CAPACITY + 1]; char adjusted_string[AZTEC_MAX_CAPACITY + 1];
short AztecMap[AZTEC_MAP_SIZE]; short AztecMap[AZTEC_MAP_SIZE];
unsigned char desc_data[4], desc_ecc[6]; unsigned char desc_data[4], desc_ecc[6];