Add itoa and utoa to see what Denis Vlasenko thinks.

diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 684d0a4fbbeb9698339f7b29ca3e39eaa31b5ea2..00cacaadfeb704e52d5e80d6a005ca66f50ce9d5 100644 (file)
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -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