diff options
Diffstat (limited to 'misc/efgcvt_r.c')
| -rw-r--r-- | misc/efgcvt_r.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/misc/efgcvt_r.c b/misc/efgcvt_r.c index 6bead573a7..3e33f660c6 100644 --- a/misc/efgcvt_r.c +++ b/misc/efgcvt_r.c @@ -1,6 +1,6 @@ /* [efg]cvt -- compatibility functions for floating point formatting, reentrent versions. -Copyright (C) 1995 Free Software Foundation, Inc. +Copyright (C) 1995, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -60,6 +60,8 @@ fcvt_r (value, ndigit, decpt, sign, buf, len) return 0; } +weak_symbol (floor) weak_symbol (log10) weak_symbol (fabs) + int ecvt_r (value, ndigit, decpt, sign, buf, len) double value; @@ -67,8 +69,22 @@ ecvt_r (value, ndigit, decpt, sign, buf, len) char *buf; size_t len; { - ndigit -= (int) floor (log10 (value < 0.0 ? -value : value)); - if (ndigit < 0) - ndigit = 0; + if (&log10) + { + /* Use the reasonable code if -lm is included. */ + ndigit -= (int) floor (log10 (fabs (value))); + if (ndigit < 0) + ndigit = 0; + } + else + { + /* Slow code that doesn't require -lm functions. */ + double d; + for (d = value < 0.0 ? - value : value; + ndigit > 0 && d >= 10.0; + d *= 0.1) + --ndigit; + } + return fcvt_r (value, ndigit, decpt, sign, buf, len); } |