mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-19 07:49:01 +08:00
181 lines
3.0 KiB
C++
181 lines
3.0 KiB
C++
// natDouble.cc - Implementation of java.lang.Double native methods.
|
|
|
|
/* Copyright (C) 1998, 1999 Cygnus Solutions
|
|
|
|
This file is part of libgcj.
|
|
|
|
This software is copyrighted work licensed under the terms of the
|
|
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
|
|
details. */
|
|
|
|
/* AIX requires this to be the first thing in the file. */
|
|
#ifndef __GNUC__
|
|
# if HAVE_ALLOCA_H
|
|
# include <alloca.h>
|
|
# else
|
|
# ifdef _AIX
|
|
#pragma alloca
|
|
# else
|
|
# ifndef alloca /* predefined by HP cc +Olibcalls */
|
|
char *alloca ();
|
|
# endif
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <cni.h>
|
|
#include <java/lang/String.h>
|
|
#include <java/lang/Double.h>
|
|
#include <java/lang/NumberFormatException.h>
|
|
#include <jvm.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "mprec.h"
|
|
|
|
union u
|
|
{
|
|
jlong l;
|
|
jdouble d;
|
|
};
|
|
|
|
jlong
|
|
java::lang::Double::doubleToLongBits(jdouble value)
|
|
{
|
|
union u u;
|
|
u.d = value;
|
|
return u.l;
|
|
}
|
|
|
|
jdouble
|
|
java::lang::Double::longBitsToDouble(jlong bits)
|
|
{
|
|
union u u;
|
|
u.l = bits;
|
|
return u.d;
|
|
}
|
|
|
|
jstring
|
|
java::lang::Double::toString(jdouble value, jboolean isFloat)
|
|
{
|
|
if (isNaN (value))
|
|
return JvNewStringLatin1 ("NaN", sizeof ("NaN") - 1);
|
|
|
|
if (value == POSITIVE_INFINITY)
|
|
return JvNewStringLatin1 ("Infinity", sizeof ("Infinity") - 1);
|
|
|
|
if (value == NEGATIVE_INFINITY)
|
|
return JvNewStringLatin1 ("-Infinity", sizeof ("-Infinity") - 1);
|
|
|
|
char buffer[50], result[50];
|
|
int decpt, sign;
|
|
|
|
_dtoa (value, 0, 20, &decpt, &sign, NULL, buffer, (int)isFloat);
|
|
|
|
value = fabs (value);
|
|
|
|
char *s = buffer;
|
|
char *d = result;
|
|
|
|
if (sign)
|
|
*d++ = '-';
|
|
|
|
if (value >= 1e-3 && value < 1e7 || value == 0)
|
|
{
|
|
if (decpt <= 0)
|
|
*d++ = '0';
|
|
else
|
|
{
|
|
for (int i = 0; i < decpt; i++)
|
|
if (*s)
|
|
*d++ = *s++;
|
|
else
|
|
*d++ = '0';
|
|
}
|
|
|
|
*d++ = '.';
|
|
|
|
if (*s == 0)
|
|
{
|
|
*d++ = '0';
|
|
decpt++;
|
|
}
|
|
|
|
while (decpt++ < 0)
|
|
*d++ = '0';
|
|
|
|
while (*s)
|
|
*d++ = *s++;
|
|
|
|
*d = 0;
|
|
|
|
return JvNewStringLatin1 (result, strlen (result));
|
|
}
|
|
|
|
*d++ = *s++;
|
|
decpt--;
|
|
*d++ = '.';
|
|
|
|
if (*s == 0)
|
|
*d++ = '0';
|
|
|
|
while (*s)
|
|
*d++ = *s++;
|
|
|
|
*d++ = 'E';
|
|
|
|
if (decpt < 0)
|
|
{
|
|
*d++ = '-';
|
|
decpt = -decpt;
|
|
}
|
|
|
|
{
|
|
char exp[4];
|
|
char *e = exp + sizeof exp;
|
|
|
|
*--e = 0;
|
|
do
|
|
{
|
|
*--e = '0' + decpt % 10;
|
|
decpt /= 10;
|
|
}
|
|
while (decpt > 0);
|
|
|
|
while (*e)
|
|
*d++ = *e++;
|
|
}
|
|
|
|
*d = 0;
|
|
|
|
return JvNewStringLatin1 (result, strlen (result));
|
|
}
|
|
|
|
jdouble
|
|
java::lang::Double::doubleValueOf(jstring str)
|
|
{
|
|
int length = str->length();
|
|
// Note that UTF can expand 3x.
|
|
|
|
#ifdef HAVE_ALLOCA
|
|
char *data = (char *) alloca (3 * length + 1);
|
|
#else
|
|
#error --- need an alternate implementation here ---
|
|
#endif
|
|
|
|
data[_Jv_GetStringUTFRegion (str, 0, length, data)] = 0;
|
|
|
|
struct _Jv_reent reent;
|
|
memset (&reent, 0, sizeof reent);
|
|
|
|
double val = _strtod_r (&reent, data, NULL);
|
|
|
|
if (reent._errno)
|
|
_Jv_Throw (new NumberFormatException);
|
|
|
|
return val;
|
|
}
|