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21 lines
439 B
C

#include "fmt.h"
#include "textcode.h"
#include "scan.h"
size_t scan_hexdump(const char *src,char *dest,size_t *destlen) {
register const unsigned char* s=(const unsigned char*) src;
size_t written=0,i;
for (i=0; s[i]; ++i) {
int j=scan_fromhex(s[i]);
if (j<0) break;
dest[written]=j<<4;
j=scan_fromhex(s[i+1]);
if (j<0) break;
dest[written]|=j;
++i;
++written;
}
*destlen=written;
return i;
}