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authorRoland McGrath <roland@gnu.org>1995-02-20 09:50:50 +0000
committerRoland McGrath <roland@gnu.org>1995-02-20 09:50:50 +0000
commit0923c7a543d377bae9da0ad7075c8f9664ae70dc (patch)
tree7fba8f9a64d1aa1a457537d8f08819ed8c1a6cf4 /misc/efgcvt.c
parent9c97d688c1798d080a42e024eda0fc6e681aa97f (diff)
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Mon Feb 20 04:04:57 1995 Roland McGrath <roland@duality.gnu.ai.mit.edu>
* config.h.in [HAVE_ELF || HAVE_GNU_LD]: Define HAVE_WEAK_SYMBOLS. * stdlib/strtod.c (PASTE, PASTE1): New helper macros; use these in access to float.h macros. * misc/efgcvt.c: New file. * misc/Makefile (routines): Add efgcvt.
Diffstat (limited to 'misc/efgcvt.c')
-rw-r--r--misc/efgcvt.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/misc/efgcvt.c b/misc/efgcvt.c
new file mode 100644
index 0000000..6473475
--- /dev/null
+++ b/misc/efgcvt.c
@@ -0,0 +1,72 @@
+/* [efg]cvt -- compatibility functions for floating point formatting
+Copyright (C) 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+
+char *
+fcvt (value, ndigit, decpt, sign)
+ double value;
+ int ndigit, *decpt, *sign;
+{
+ static char buf[100];
+ int n, i;
+
+ *sign = value < 0.0;
+ if (*sign)
+ value = - value;
+
+ n = snprintf (buf, sizeof buf, "%.*f", ndigit, value);
+ if (n < 0)
+ return NULL;
+
+ i = 0;
+ while (i < n && isdigit (buf[i]))
+ ++i;
+ *decpt = i;
+ do
+ ++i;
+ while (! isdigit (buf[i]));
+ memmove (&buf[i - *decpt], buf, n - (i - *decpt));
+
+ return buf;
+}
+
+char *
+ecvt (value, ndigit, decpt, sign)
+ double value;
+ int ndigit, *decpt, *sign;
+{
+ ndigit -= (int) floor (log10 (value));
+ if (ndigit < 0)
+ ndigit = 0;
+ return fcvt (value, ndigit, decpt, sign);
+}
+
+char *
+gcvt (value, ndigit, buf)
+ double value;
+ int ndigit;
+ char *buf;
+{
+ sprintf (buf, "%.*g", ndigit, value);
+ return buf;
+}