a8f6a1c121
write generic stralloc and array textcode wrapper functions change textcode API to use long instead of int add cescape fmt and scan functions to textcode add fmt_foldwhitespace to textcode
35 lines
755 B
C
35 lines
755 B
C
#include "textcode.h"
|
|
#include "haveinline.h"
|
|
|
|
static inline int dec(unsigned char x) {
|
|
if (x>='A' && x<='Z') return x-'A';
|
|
if (x>='a' && x<='z') return x-'a'+26;
|
|
if (x>='0' && x<='9') return x-'0'+26+26;
|
|
switch (x) {
|
|
case '+': return 62;
|
|
case '/': return 63;
|
|
default: return -1;
|
|
}
|
|
}
|
|
|
|
unsigned long scan_base64(const char *src,char *dest,unsigned long *destlen) {
|
|
unsigned short tmp=0,bits=0;
|
|
register const unsigned char* s=(const unsigned char*) src;
|
|
const char* orig=dest;
|
|
for (;;) {
|
|
int a=dec(*s);
|
|
if (a<0) {
|
|
while (*s=='=') ++s;
|
|
break;
|
|
}
|
|
tmp=(tmp<<6)|a; bits+=6;
|
|
++s;
|
|
if (bits>=8) {
|
|
*dest=(tmp>>(bits-=8));
|
|
++dest;
|
|
}
|
|
}
|
|
*destlen=dest-orig;
|
|
return (const char*)s-src;
|
|
}
|