diff options
| -rw-r--r-- | libbb/xfuncs.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c index 684d0a4fb..00cacaadf 100644 --- 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 |