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24 lines
620 B
C
24 lines
620 B
C
#include "fmt.h"
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#include "textcode.h"
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#include "haveinline.h"
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unsigned int fmt_base64(char* dest,const char* src,unsigned int len) {
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register const unsigned char* s=(const unsigned char*) src;
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unsigned short bits=0,temp=0;
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unsigned long written=0,i;
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for (i=0; i<len; ++i) {
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temp<<=8; temp+=s[i]; bits+=8;
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while (bits>6) {
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if (dest) dest[written]=base64[((temp>>(bits-6))&63)];
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++written; bits-=6;
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}
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}
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if (bits) {
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temp<<=(6-bits);
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if (dest) dest[written]=base64[temp&63];
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++written;
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}
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while (written&3) { if (dest) dest[written]='='; ++written; }
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return written;
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}
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