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QR-Code-generator
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Moved more shared logic of C code into encodeQrCodeTail(), without changing behavior.

This commit is contained in:
Project Nayuki 2017-04-20 04:55:28 +00:00
parent 7eb3095acf
commit 6229fa48cd
1 changed files with 22 additions and 32 deletions
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54
c/qrcodegen.c
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@ -31,7 +31,7 @@
/*---- Forward declarations for private functions ----*/
static void encodeQrCodeTail(uint8_t dataAndQrcode[], uint8_t tempBuffer[], int version, enum qrcodegen_Ecc ecl, enum qrcodegen_Mask mask);
static void encodeQrCodeTail(uint8_t dataAndQrcode[], int bitLen, uint8_t tempBuffer[], int version, enum qrcodegen_Ecc ecl, enum qrcodegen_Mask mask, bool boostEcl);
static long getPenaltyScore(const uint8_t qrcode[], int qrsize);
static void appendBitsToBuffer(unsigned int val, int numBits, uint8_t buffer[], int *bitLen);
static int getNumDataCodewords(int version, enum qrcodegen_Ecc ecl);
@ -155,12 +155,6 @@ int qrcodegen_encodeText(const char *text, uint8_t tempBuffer[], uint8_t qrcode[
return 0;
}
assert(dataUsedBits >= 0 && dataCapacityBits >= 0);
if (boostEcl) {
if (dataUsedBits <= getNumDataCodewords(version, qrcodegen_Ecc_MEDIUM ) * 8) ecl = qrcodegen_Ecc_MEDIUM ;
if (dataUsedBits <= getNumDataCodewords(version, qrcodegen_Ecc_QUARTILE) * 8) ecl = qrcodegen_Ecc_QUARTILE;
if (dataUsedBits <= getNumDataCodewords(version, qrcodegen_Ecc_HIGH ) * 8) ecl = qrcodegen_Ecc_HIGH ;
dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
}
memset(qrcode, 0, qrcodegen_BUFFER_LEN_FOR_VERSION(version) * sizeof(qrcode[0]));
int bitLen = 0;
@ -195,15 +189,7 @@ int qrcodegen_encodeText(const char *text, uint8_t tempBuffer[], uint8_t qrcode[
if (accumCount > 0) // 1 character remaining
appendBitsToBuffer(accumData, 6, qrcode, &bitLen);
}
int terminatorBits = dataCapacityBits - bitLen;
if (terminatorBits > 4)
terminatorBits = 4;
appendBitsToBuffer(0, terminatorBits, qrcode, &bitLen);
appendBitsToBuffer(0, (8 - bitLen % 8) % 8, qrcode, &bitLen);
for (uint8_t padByte = 0xEC; bitLen < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
appendBitsToBuffer(padByte, 8, qrcode, &bitLen);
assert(bitLen % 8 == 0);
encodeQrCodeTail(qrcode, tempBuffer, version, ecl, mask);
encodeQrCodeTail(qrcode, bitLen, tempBuffer, version, ecl, mask, boostEcl);
return version;
}
@ -231,12 +217,6 @@ int qrcodegen_encodeBinary(uint8_t dataAndTemp[], size_t dataLen, uint8_t qrcode
return 0;
}
assert(dataUsedBits >= 0 && dataCapacityBits >= 0);
if (boostEcl) {
if (dataUsedBits <= getNumDataCodewords(version, qrcodegen_Ecc_MEDIUM ) * 8) ecl = qrcodegen_Ecc_MEDIUM ;
if (dataUsedBits <= getNumDataCodewords(version, qrcodegen_Ecc_QUARTILE) * 8) ecl = qrcodegen_Ecc_QUARTILE;
if (dataUsedBits <= getNumDataCodewords(version, qrcodegen_Ecc_HIGH ) * 8) ecl = qrcodegen_Ecc_HIGH ;
dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
}
memset(qrcode, 0, qrcodegen_BUFFER_LEN_FOR_VERSION(version) * sizeof(qrcode[0]));
int bitLen = 0;
@ -244,15 +224,7 @@ int qrcodegen_encodeBinary(uint8_t dataAndTemp[], size_t dataLen, uint8_t qrcode
appendBitsToBuffer((unsigned int)dataLen, (version <= 9 ? 8 : 16), qrcode, &bitLen);
for (size_t i = 0; i < dataLen; i++)
appendBitsToBuffer(dataAndTemp[i], 8, qrcode, &bitLen);
int terminatorBits = dataCapacityBits - bitLen;
if (terminatorBits > 4)
terminatorBits = 4;
appendBitsToBuffer(0, terminatorBits, qrcode, &bitLen);
appendBitsToBuffer(0, (8 - bitLen % 8) % 8, qrcode, &bitLen);
for (uint8_t padByte = 0xEC; bitLen < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
appendBitsToBuffer(padByte, 8, qrcode, &bitLen);
assert(bitLen % 8 == 0);
encodeQrCodeTail(qrcode, dataAndTemp, version, ecl, mask);
encodeQrCodeTail(qrcode, bitLen, dataAndTemp, version, ecl, mask, boostEcl);
return version;
}
@ -260,7 +232,25 @@ int qrcodegen_encodeBinary(uint8_t dataAndTemp[], size_t dataLen, uint8_t qrcode
// Given data codewords in dataAndQrcode already padded to the length specified by the
// version and ECC level, this function adds ECC bytes, interleaves blocks, renders the
// QR Code symbol back to the array dataAndQrcode, and handles automatic mask selection.
static void encodeQrCodeTail(uint8_t dataAndQrcode[], uint8_t tempBuffer[], int version, enum qrcodegen_Ecc ecl, enum qrcodegen_Mask mask) {
static void encodeQrCodeTail(uint8_t dataAndQrcode[], int bitLen, uint8_t tempBuffer[],
int version, enum qrcodegen_Ecc ecl, enum qrcodegen_Mask mask, bool boostEcl) {
if (boostEcl) {
if (bitLen <= getNumDataCodewords(version, qrcodegen_Ecc_MEDIUM ) * 8) ecl = qrcodegen_Ecc_MEDIUM ;
if (bitLen <= getNumDataCodewords(version, qrcodegen_Ecc_QUARTILE) * 8) ecl = qrcodegen_Ecc_QUARTILE;
if (bitLen <= getNumDataCodewords(version, qrcodegen_Ecc_HIGH ) * 8) ecl = qrcodegen_Ecc_HIGH ;
}
int dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
int terminatorBits = dataCapacityBits - bitLen;
if (terminatorBits > 4)
terminatorBits = 4;
appendBitsToBuffer(0, terminatorBits, dataAndQrcode, &bitLen);
appendBitsToBuffer(0, (8 - bitLen % 8) % 8, dataAndQrcode, &bitLen);
for (uint8_t padByte = 0xEC; bitLen < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
appendBitsToBuffer(padByte, 8, dataAndQrcode, &bitLen);
assert(bitLen % 8 == 0);
int qrsize = qrcodegen_getSize(version);
appendErrorCorrection(dataAndQrcode, version, ecl, tempBuffer);
initializeFunctionModules(version, dataAndQrcode);