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Fix Base64 size calculation behavior to always return the actual conversion size

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This commit is contained in:
Michael Hansen
2011-04-12 22:58:55 -07:00
parent d4ffe82237
commit dfebad4a54
3 changed files with 15 additions and 12 deletions
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2
Sources/Plasma/NucleusLib/pnUtils/Private/pnUtBase64.cpp
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@ -132,7 +132,7 @@ unsigned Base64Decode (
byte * dstData
) {
ASSERT(srcData);
ASSERT(dstChars >= Base64DecodeSize(srcChars));
ASSERT(dstChars >= Base64DecodeSize(srcChars, srcData));
ASSERT(dstData);
const byte * dstBase = dstData;

9
Sources/Plasma/NucleusLib/pnUtils/Private/pnUtBase64.h
View File

@ -46,7 +46,8 @@ const unsigned kBase64EncodeBlock = 4;
const unsigned kBase64EncodeMultiple = 3;
inline unsigned Base64EncodeSize (unsigned srcChars) {
return srcChars * kBase64EncodeBlock / kBase64EncodeMultiple + kBase64EncodeBlock;
return (srcChars + kBase64EncodeMultiple - 1) / kBase64EncodeMultiple
* kBase64EncodeBlock;
}
unsigned Base64Encode (
unsigned srcChars,
@ -55,8 +56,10 @@ unsigned Base64Encode (
char * dstData
);
inline unsigned Base64DecodeSize (unsigned srcChars) {
return srcChars * kBase64EncodeMultiple / kBase64EncodeBlock + kBase64EncodeMultiple;
inline unsigned Base64DecodeSize (unsigned srcChars, const char srcData[]) {
return srcChars * kBase64EncodeMultiple / kBase64EncodeBlock
- ((srcChars >= 1 && srcData[srcChars - 1] == '=') ? 1 : 0)
- ((srcChars >= 2 && srcData[srcChars - 2] == '=') ? 1 : 0);
}
unsigned Base64Decode (
unsigned srcChars,