/* numeric.c
*
- * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2005 by Larry Wall and others
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ * 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
U32
Perl_cast_ulong(pTHX_ NV f)
{
+ PERL_UNUSED_CONTEXT;
if (f < 0.0)
return f < I32_MIN ? (U32) I32_MIN : (U32)(I32) f;
if (f < U32_MAX_P1) {
I32
Perl_cast_i32(pTHX_ NV f)
{
+ PERL_UNUSED_CONTEXT;
if (f < I32_MAX_P1)
return f < I32_MIN ? I32_MIN : (I32) f;
if (f < U32_MAX_P1) {
IV
Perl_cast_iv(pTHX_ NV f)
{
+ PERL_UNUSED_CONTEXT;
if (f < IV_MAX_P1)
return f < IV_MIN ? IV_MIN : (IV) f;
if (f < UV_MAX_P1) {
UV
Perl_cast_uv(pTHX_ NV f)
{
+ PERL_UNUSED_CONTEXT;
if (f < 0.0)
return f < IV_MIN ? (UV) IV_MIN : (UV)(IV) f;
if (f < UV_MAX_P1) {
Perl_grok_numeric_radix(pTHX_ const char **sp, const char *send)
{
#ifdef USE_LOCALE_NUMERIC
+ dVAR;
if (PL_numeric_radix_sv && IN_LOCALE) {
STRLEN len;
const char * const radix = SvPV(PL_numeric_radix_sv, len);
{
NV x = 0.0;
#ifdef USE_LOCALE_NUMERIC
+ dVAR;
if (PL_numeric_local && IN_LOCALE) {
NV y;
else if (!seen_dp && GROK_NUMERIC_RADIX(&s, send)) {
seen_dp = 1;
if (sig_digits > MAX_SIG_DIGITS) {
- ++s;
- while (isDIGIT(*s)) {
+ do {
++s;
- }
+ } while (isDIGIT(*s));
break;
}
}
#endif
/*
+=for apidoc Perl_signbit
+
+Return a non-zero integer if the sign bit on an NV is set, and 0 if
+it is not.
+
+If Configure detects this system has a signbit() that will work with
+our NVs, then we just use it via the #define in perl.h. Otherwise,
+fall back on this implementation. As a first pass, this gets everything
+right except -0.0. Alas, catching -0.0 is the main use for this function,
+so this is not too helpful yet. Still, at least we have the scaffolding
+in place to support other systems, should that prove useful.
+
+
+Configure notes: This function is called 'Perl_signbit' instead of a
+plain 'signbit' because it is easy to imagine a system having a signbit()
+function or macro that doesn't happen to work with our particular choice
+of NVs. We shouldn't just re-#define signbit as Perl_signbit and expect
+the standard system headers to be happy. Also, this is a no-context
+function (no pTHX_) because Perl_signbit() is usually re-#defined in
+perl.h as a simple macro call to the system's signbit().
+Users should just always call Perl_signbit().
+
+=cut
+*/
+#if !defined(HAS_SIGNBIT)
+int
+Perl_signbit(NV x) {
+ return (x < 0.0) ? 1 : 0;
+}
+#endif
+
+/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4