diff options
Diffstat (limited to 'libc/misc/internals/tempname.c')
| -rw-r--r-- | libc/misc/internals/tempname.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/libc/misc/internals/tempname.c b/libc/misc/internals/tempname.c index 3c43f9b85..41325d998 100644 --- a/libc/misc/internals/tempname.c +++ b/libc/misc/internals/tempname.c @@ -16,6 +16,11 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +/* March 11, 2002 Manuel Novoa III + * + * Modify code to remove dependency on libgcc long long arith support funcs. + */ + #include <stddef.h> #include <stdint.h> #include <stdio.h> @@ -117,8 +122,11 @@ int __gen_tempname (char *tmpl, int openit) char *XXXXXX; static uint64_t value; struct timeval tv; + uint32_t high, low, rh; + unsigned int k; int count, fd; int save_errno = errno; + int i; len = strlen (tmpl); if (len < 6 || strcmp (&tmpl[len - 6], "XXXXXX")) @@ -136,20 +144,21 @@ int __gen_tempname (char *tmpl, int openit) for (count = 0; count < TMP_MAX; value += 7777, ++count) { - uint64_t v = value; - - /* Fill in the random bits. */ - XXXXXX[0] = letters[v % 62]; - v /= 62; - XXXXXX[1] = letters[v % 62]; - v /= 62; - XXXXXX[2] = letters[v % 62]; - v /= 62; - XXXXXX[3] = letters[v % 62]; - v /= 62; - XXXXXX[4] = letters[v % 62]; - v /= 62; - XXXXXX[5] = letters[v % 62]; + low = value & UINT32_MAX; + high = value >> 32; + + for (i = 0 ; i < 6 ; i++) { + rh = high % 62; + high /= 62; +#define L ((UINT32_MAX % 62 + 1) % 62) + k = (low % 62) + (L * rh); +#undef L +#define H ((UINT32_MAX / 62) + ((UINT32_MAX % 62 + 1) / 62)) + low = (low / 62) + (H * rh) + (k / 62); +#undef H + k %= 62; + XXXXXX[i] = letters[k]; + } if (openit) { |