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cmText.c : Implemented cmTextEncodeBase64().

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This commit is contained in:
Kevin Larke 2015-07-31 11:12:22 -07:00
parent c5eaaf54b0
commit fd59f5ae69
1 changed files with 62 additions and 4 deletions
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66
cmText.c
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@ -1192,6 +1192,8 @@ cmTxRC_t cmTextDecodeBase64( const char* xV, unsigned xN, void* yV, unsigned yN
--yn;
unsigned v = 0;
assert( i + 4 <= xN );
v += t[(int)xV[i++]] << 18;
v += t[(int)xV[i++]] << 12;
@ -1227,11 +1229,67 @@ cmTxRC_t cmTextDecodeBase64( const char* xV, unsigned xN, void* yV, unsigned yN
unsigned cmTextEncodeBase64BufferByteCount( unsigned binByteCnt )
{
return 0;
int rem = binByteCnt % 3;
binByteCnt -= rem;
int n = binByteCnt / 3 * 4;
if( rem )
n += 4;
return n;
}
cmTxRC_t cmTextEncodeBase64( const void* xV, unsigned xN, char* yV, unsigned yN )
unsigned cmTextEncodeBase64( const void* xV, unsigned xN, char* yV, unsigned yN )
{
// const char* t = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
return kOkTxRC;
const char* t = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
const char* zV = (const char*)xV;
unsigned i = 0;
unsigned j = 0;
while( 1 )
{
unsigned k = 3;
unsigned v = ((int)zV[i++]) << 16;
if( i < xN )
v += ((int)zV[i++]) << 8;
else
--k;
if( i < xN )
v += ((int)zV[i++]);
else
--k;
if( j >= yN )
break;
yV[j++] = t[ (v & 0xfc0000) >> 18 ];
if( j >= yN )
break;
yV[j++] = t[ (v & 0x03f000) >> 12 ];
if( j >= yN )
break;
if( k > 1 )
yV[j++] = t[ (v & 0x000fc0) >> 6 ];
else
yV[j++] = '=';
if( j >= yN )
break;
if( k > 2 )
yV[j++] = t[ (v & 0x00003f) >> 0 ];
else
yV[j++] = '=';
}
return j;
}