You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
591 B
C
30 lines
591 B
C
#include "fmt.h"
|
|
#include "haveinline.h"
|
|
|
|
static inline char tohex(char c) {
|
|
return (char)(c>=10?c-10+'a':c+'0');
|
|
}
|
|
|
|
size_t fmt_xlong(char *dest,unsigned long i) {
|
|
register unsigned long len,tmp;
|
|
/* first count the number of bytes needed */
|
|
for (len=1, tmp=i; tmp>15; ++len) tmp>>=4;
|
|
if (dest)
|
|
for (tmp=i, dest+=len; ; ) {
|
|
*--dest = tohex(tmp&15);
|
|
if (!(tmp>>=4)) break;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
#ifdef UNITTEST
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
int main() {
|
|
char buf[100];
|
|
assert(fmt_xlong(buf,0x12345)==5 && !memcmp(buf,"12345",5));
|
|
return 0;
|
|
}
|
|
#endif
|