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Simplified calculation of base64 encoded and decoded length #28

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Simplified calculation of base64 encoded and decoded length #28

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6 changes: 3 additions & 3 deletions Base64.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -94,8 +94,8 @@ int base64_decode(char * output, char * input, int inputLen) {
}

int base64_enc_len(int plainLen) {
int n = plainLen;
return (n + 2 - ((n + 2) % 3)) / 3 * 4;
int numWholeOrPartialInputBlocks = (sourceLength + 2) / 3;
return numWholeOrPartialInputBlocks * 4;
}

int base64_dec_len(char * input, int inputLen) {
Expand All @@ -105,7 +105,7 @@ int base64_dec_len(char * input, int inputLen) {
numEq++;
}

return ((6 * inputLen) / 8) - numEq;
return (inputLen >> 2) * 3 - numEq;
}

inline void a3_to_a4(unsigned char * a4, unsigned char * a3) {
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