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Add itoa and utoa to see what Denis Vlasenko thinks.

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This commit is contained in:
Rob Landley 2006-07-10 07:41:34 +00:00
parent 3bfcf3cccc
commit 5b88a38157
1 changed files with 50 additions and 1 deletions
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51
libbb/xfuncs.c
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@ -229,4 +229,53 @@ int wait4pid(int pid)
if (WIFSIGNALED(status)) return WTERMSIG(status);
return 0;
}
#endif
#endif
#ifdef L_itoa
// Largest 32 bit integer is -2 billion plus null terminator.
// Int should always be 32 bits on a Unix-oid system, see
// http://www.unix.org/whitepapers/64bit.html
static char local_buf[12];
void utoa_to_buf(unsigned n, char *buf, int buflen)
{
int i, out = 0;
for (i=1000000000; i; i/=10) {
int res = n/i;
if (res || out || i == 1) {
out++;
n -= res*i;
*buf++ = '0' + res;
}
}
*buf = 0;
}
// Note: uses static buffer, calling it twice in a row will overwrite.
char *utoa(unsigned n)
{
utoa_to_buf(n, local_buf, sizeof(local_buf));
return local_buf;
}
void itoa_to_buf(int n, char *buf, int buflen)
{
if (n<0) {
n = -n;
*buf++ = '-';
}
utoa_to_buf((unsigned)n, buf, buflen);
}
// Note: uses static buffer, calling it twice in a row will overwrite.
char *itoa(int n)
{
itoa_to_buf(n, local_buf, sizeof(local_buf));
return local_buf;
}
#endif