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Interpret 4-bit codewords as big-endian for error correction

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affects microQR symbol sizes M1 and M3
bug reported by Milton Neal
This commit is contained in:
Robin Stuart 2016-11-25 22:21:30 +00:00
parent 658cdd7a69
commit b003627908
1 changed files with 9 additions and 23 deletions
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28
backend/qr.c
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@ -2128,7 +2128,7 @@ void micro_qr_m1(char binary_data[]) {
data_blocks[2] = 0;
for (j = 0; j < 4; j++) {
if (binary_data[16 + j] == '1') {
data_blocks[2] += 0x08 >> j;
data_blocks[2] += 0x80 >> j;
}
}
@ -2302,33 +2302,19 @@ void micro_qr_m3(char binary_data[], int ecc_mode) {
if (ecc_mode == LEVEL_L) {
data_blocks[10] = 0;
if (binary_data[80] == '1') {
data_blocks[10] += 0x08;
for (j = 0; j < 4; j++) {
if (binary_data[80 + j] == '1') {
data_blocks[10] += 0x80 >> j;
}
if (binary_data[81] == '1') {
data_blocks[10] += 0x04;
}
if (binary_data[82] == '1') {
data_blocks[10] += 0x02;
}
if (binary_data[83] == '1') {
data_blocks[10] += 0x01;
}
}
if (ecc_mode == LEVEL_M) {
data_blocks[8] = 0;
if (binary_data[64] == '1') {
data_blocks[8] += 0x08;
for (j = 0; j < 4; j++) {
if (binary_data[64 + j] == '1') {
data_blocks[8] += 0x80 >> j;
}
if (binary_data[65] == '1') {
data_blocks[8] += 0x04;
}
if (binary_data[66] == '1') {
data_blocks[8] += 0x02;
}
if (binary_data[67] == '1') {
data_blocks[8] += 0x01;
}
}