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Remove error correction bug for Australia Post symbols

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Bug found by Milton Neal <miltonneal@bigpond.com>
This commit is contained in:
Robin Stuart 2018-03-15 19:17:34 +00:00
parent 749eb55321
commit 57075248ff
1 changed files with 2 additions and 6 deletions
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8
backend/auspost.c
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@ -70,7 +70,7 @@ static inline char convert_pattern(char data, int shift) {
/* Adds Reed-Solomon error correction to auspost */ /* Adds Reed-Solomon error correction to auspost */
void rs_error(char data_pattern[]) { void rs_error(char data_pattern[]) {
size_t reader, triple_writer = 0; size_t reader, triple_writer = 0;
char triple[31], inv_triple[31]; char triple[31];
unsigned char result[5]; unsigned char result[5];
for (reader = 2; reader < strlen(data_pattern); reader += 3, triple_writer++) { for (reader = 2; reader < strlen(data_pattern); reader += 3, triple_writer++) {
@ -79,13 +79,9 @@ void rs_error(char data_pattern[]) {
+ convert_pattern(data_pattern[reader + 2], 0); + convert_pattern(data_pattern[reader + 2], 0);
} }
for (reader = 0; reader < triple_writer; reader++) {
inv_triple[reader] = triple[(triple_writer - 1) - reader];
}
rs_init_gf(0x43); rs_init_gf(0x43);
rs_init_code(4, 1); rs_init_code(4, 1);
rs_encode(triple_writer, (unsigned char*) inv_triple, result); rs_encode(triple_writer, (unsigned char*) triple, result);
for (reader = 4; reader > 0; reader--) { for (reader = 4; reader > 0; reader--) {
strcat(data_pattern, AusBarTable[(int) result[reader - 1]]); strcat(data_pattern, AusBarTable[(int) result[reader - 1]]);