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Addition new function base64_encode

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git-svn-id: svn://kolibrios.org@7944 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pavelyakov 2020-05-18 08:21:38 +00:00
parent 63b9f19b26
commit e43264a49a
1 changed files with 59 additions and 0 deletions
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59
programs/cmm/lib/base64.h Normal file
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/* Author: PaulCodeman
Example:
char bufferb64[0x1000] = {0};
base64_encode("Kevin van Zonneveld",#bufferb64, 19);
#bufferb64 == "S2V2aW4gdmFuIFpvbm5ldmVsZA=="
*/
:dword b64_symbols = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
inline void base64_encode(dword data, buffer, length)
{
byte o1 = 0;
byte o2 = 0;
byte o3 = 0;
dword bits = 0;
dword h1 = 0;
dword h2 = 0;
dword h3 = 0;
dword h4 = 0;
dword end = 0;
end = data+length;
do
{
o1 = DSBYTE[data];data++;
if (data < end) {o2 = DSBYTE[data];data++;} else o2 = 0;
if (data < end) {o3 = DSBYTE[data];data++;} else o3 = 0;
bits = o1<<16;
bits |= o2<<8;
bits |= o3;
h1 = bits>>18 & 0x3f;
h2 = bits>>12 & 0x3f;
h3 = bits>>6 & 0x3f;
h4 = bits & 0x3f;
DSBYTE[buffer] = DSBYTE[#b64_symbols+h1];buffer++;
DSBYTE[buffer] = DSBYTE[#b64_symbols+h2];buffer++;
DSBYTE[buffer] = DSBYTE[#b64_symbols+h3];buffer++;
DSBYTE[buffer] = DSBYTE[#b64_symbols+h4];buffer++;
} while(end > data);
switch(length % 3)
{
case 1:
buffer--;
DSBYTE[buffer] = '=';
buffer--;
DSBYTE[buffer] = '=';
buffer+=2;
break;
case 2:
buffer--;
DSBYTE[buffer] = '=';
buffer++;
break;
}
DSBYTE[buffer] = 0;
}