#include "textcode.h" size_t scan_uuencoded(const char *src,char *dest,size_t *destlen) { size_t len; size_t tmp; register const unsigned char* s=(const unsigned char*) src; size_t i=0; if ((len=*s-' ')>64) return 0; len&=63; ++s; while (len>0) { if (s[0]-' '>64 || s[1]-' '>64 || s[2]-' '>64 || s[3]-' '>64) return 0; tmp=(((s[0]-' ')&077) << (3*6)) + (((s[1]-' ')&077) << (2*6)) + (((s[2]-' ')&077) << (1*6)) + (((s[3]-' ')&077)); s+=4; if (len) { if (dest) dest[i++]=tmp>>16; --len; } if (len) { if (dest) dest[i++]=tmp>>8; --len; } if (len) { if (dest) dest[i++]=tmp&0xff; --len; } } if (destlen) *destlen=i; return (const char*)s-src; } #ifdef UNITTEST #include <assert.h> #include <stdio.h> #include <string.h> int main() { char buf[100]; size_t i; memset(buf,0,100); assert(scan_uuencoded("&9FYO<F0*",buf,&i)==9 && i==6 && !memcmp(buf,"fnord\n",7)); memset(buf,0,100); assert(scan_uuencoded("%9FYO<F0`",buf,&i)==9 && i==5 && !memcmp(buf,"fnord",6)); return 0; } #endif