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/* Copyright (C) 2003-2015 LiveCode Ltd.
This file is part of LiveCode.
LiveCode is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License v3 as published by the Free
Software Foundation.
LiveCode 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LiveCode. If not see <http://www.gnu.org/licenses/>. */
#include <foundation.h>
#include <foundation-stdlib.h>
#include <errno.h>
#include "foundation-private.h"
////////////////////////////////////////////////////////////////////////////////
MC_DLLEXPORT_DEF
bool MCNumberCreateWithInteger(integer_t p_value, MCNumberRef& r_number)
{
__MCNumber *self;
if (!__MCValueCreate(kMCValueTypeCodeNumber, self))
return false;
self -> integer = p_value;
r_number = self;
return true;
}
MC_DLLEXPORT_DEF
bool MCNumberCreateWithReal(real64_t p_value, MCNumberRef& r_number)
{
__MCNumber *self;
if (!__MCValueCreate(kMCValueTypeCodeNumber, self))
return false;
self -> real = p_value;
self -> flags |= (1 << 0);
r_number = self;
return true;
}
MC_DLLEXPORT_DEF
bool MCNumberCreateWithUnsignedInteger(uinteger_t p_value, MCNumberRef& r_number)
{
if (p_value <= INTEGER_MAX)
return MCNumberCreateWithInteger((integer_t)p_value, r_number);
return MCNumberCreateWithReal((real64_t)p_value, r_number);
}
MC_DLLEXPORT_DEF
bool MCNumberIsInteger(MCNumberRef self)
{
__MCAssertIsNumber(self);
return (self -> flags & kMCNumberFlagIsReal) == 0;
}
MC_DLLEXPORT_DEF
bool MCNumberIsReal(MCNumberRef self)
{
__MCAssertIsNumber(self);
return (self -> flags & kMCNumberFlagIsReal) != 0;
}
MC_DLLEXPORT_DEF
real64_t MCNumberFetchAsReal(MCNumberRef self)
{
if (MCNumberIsReal(self))
return self -> real;
return (real64_t)self -> integer;
}
MC_DLLEXPORT_DEF
integer_t MCNumberFetchAsInteger(MCNumberRef self)
{
if (MCNumberIsInteger(self))
return self -> integer;
return self -> real < 0.0 ? (integer_t)(self -> real - 0.5) : (integer_t)(self -> real + 0.5);
}
MC_DLLEXPORT_DEF
uinteger_t MCNumberFetchAsUnsignedInteger(MCNumberRef self)
{
if (MCNumberIsInteger(self))
return self -> integer >= 0 ? self -> integer : 0;
return self -> real >= 0.0 ? (uinteger_t)(self -> real + 0.5) : (uinteger_t)0.0;
}
compare_t MCNumberCompareTo(MCNumberRef self, MCNumberRef p_other_self)
{
// First determine the storage types of both numbers.
bool t_self_is_integer, t_other_self_is_integer;
t_self_is_integer = MCNumberIsInteger(self);
t_other_self_is_integer = MCNumberIsInteger(p_other_self);
// If both are stored as integers then compare.
if (t_self_is_integer && t_other_self_is_integer)
return self -> integer - p_other_self -> integer;
// Otherwise fetch both as reals.
double x, y;
x = t_self_is_integer ? (double)self -> integer : self -> real;
y = t_other_self_is_integer ? (double)p_other_self -> integer : p_other_self -> real;
// TODO: Handle nan / infinity / etc.
if (x < y)
return -1;
if (x > y)
return 1;
return 0;
}
bool __MCNumberParseNativeString(const char *p_string, uindex_t p_length, bool p_full_string, uindex_t &r_length_used, MCNumberRef &r_number)
{
bool t_success;
t_success = true;
MCNumberRef t_number;
t_number = nil;
uinteger_t t_base;
t_base = 10;
const char *t_string;
t_string = p_string;
if (p_length > 2 &&
p_string[0] == '0' &&
(p_string[1] == 'x' || p_string[1] == 'X'))
{
// If the string begins with 0x then parse as hex, and discard first two chars
t_base = 16;
t_string += 2;
}
errno = 0;
char *t_end;
t_end = nil;
integer_t t_integer;
#if defined(__LP64__)
long t_long;
t_long = strtol(t_string, &t_end, t_base);
if (t_long > UINTEGER_MAX)
errno = ERANGE;
t_integer = (integer_t)t_long;
#elif defined(__LP32__) || defined(__LLP64__)
t_integer = strtol(t_string, &t_end, t_base);
#endif
t_success = (errno != ERANGE) && (p_full_string ? (t_end - p_string == (ptrdiff_t)p_length) : (t_end != t_string));
if (t_success)
t_success = MCNumberCreateWithInteger(t_integer, t_number);
// If parsing as base 10 unsigned integer failed, try to parse as real.
else if (t_base == 10)
{
errno = 0;
real64_t t_real;
t_real = strtod(p_string, &t_end);
// SN-2014-10-06: [[ Bug 13594 ]] check that no error was encountered
t_success = (errno != ERANGE) && (p_full_string ? (t_end - p_string == (ptrdiff_t)p_length) : (t_end != t_string));
if (t_success)
t_success = MCNumberCreateWithReal(t_real, t_number);
}
if (t_success)
{
r_number = t_number;
r_length_used = t_end - p_string;
}
return t_success;
}
MC_DLLEXPORT_DEF
bool MCNumberParseOffset(MCStringRef p_string, uindex_t offset, uindex_t char_count, MCNumberRef &r_number)
{
uindex_t length = MCStringGetLength(p_string);
if (offset > length)
offset = length;
if (char_count > length - offset)
char_count = length - offset;
if (!MCStringIsNative(p_string))
return MCNumberParseUnicodeChars(MCStringGetCharPtr(p_string) + offset, char_count, r_number);
bool t_success;
t_success = false;
uindex_t t_length_used;
t_length_used = 0;
t_success = __MCNumberParseNativeString((const char*)MCStringGetNativeCharPtr(p_string) + offset, char_count, true, t_length_used, r_number);
return t_success;
}
MC_DLLEXPORT_DEF
bool MCNumberParse(MCStringRef p_string, MCNumberRef &r_number)
{
return MCNumberParseOffset(p_string, 0, MCStringGetLength(p_string), r_number);
}
MC_DLLEXPORT_DEF
bool MCNumberParseUnicodeChars(const unichar_t *p_chars, uindex_t p_char_count, MCNumberRef& r_number)
{
char *t_native_chars;
if (!MCMemoryNewArray(p_char_count + 1, t_native_chars))
return false;
uindex_t t_native_char_count;
MCUnicodeCharsMapToNative(p_chars, p_char_count, (char_t *)t_native_chars, t_native_char_count, '?');
bool t_success;
t_success = false;
uindex_t t_length_used;
t_length_used = 0;
t_success = __MCNumberParseNativeString(t_native_chars, p_char_count, true, t_length_used, r_number);
MCMemoryDeleteArray(t_native_chars);
return t_success;
}
MC_DLLEXPORT_DEF
bool MCNumberParseOffsetPartial(MCStringRef p_string, uindex_t offset, uindex_t &r_chars_used, MCNumberRef &r_number)
{
bool t_success;
t_success = true;
char *t_buffer;
t_buffer = nil;
const char *t_native_string;
t_native_string = nil;
uindex_t t_length;
t_length = MCStringGetLength(p_string);
if (offset > t_length)
offset = t_length;
if (MCStringIsNative(p_string))
t_native_string = (const char*)MCStringGetNativeCharPtr(p_string) + offset;
else
{
t_success = MCMemoryNewArray(t_length - offset + 1, t_buffer);
uindex_t t_native_char_count;
if (t_success)
t_success = MCUnicodeCharsMapToNative(MCStringGetCharPtr(p_string) + offset, t_length - offset, (char_t*)t_buffer, t_native_char_count, '?');
t_native_string = t_buffer;
}
if (t_success)
t_success = __MCNumberParseNativeString(t_native_string, t_length - offset, false, r_chars_used, r_number);
MCMemoryDeleteArray(t_buffer);
return t_success;
}
#if defined(__MAC__) || defined (__IOS__)
#include <CoreFoundation/CoreFoundation.h>
MC_DLLEXPORT_DEF
bool MCNumberConvertToCFNumberRef(MCNumberRef self, CFNumberRef& r_number)
{
CFNumberRef t_number;
if (MCNumberIsInteger(self))
t_number = CFNumberCreate(NULL,
kCFNumberIntType,
&self -> integer);
else
t_number = CFNumberCreate(NULL,
kCFNumberFloat64Type,
&self -> real);
if (t_number == NULL)
return false;
r_number = t_number;
return true;
}
#endif
////////////////////////////////////////////////////////////////////////////////
bool __MCNumberCopyDescription(__MCNumber *self, MCStringRef& r_string)
{
if (MCNumberIsInteger(self))
return MCStringFormat(r_string, "%d", self -> integer);
return MCStringFormat(r_string, "%lf", self -> real);
}
hash_t __MCNumberHash(__MCNumber *self)
{
if (MCNumberIsInteger(self))
return MCHashInteger(self -> integer);
return MCHashDouble(self -> real);
}
bool __MCNumberIsEqualTo(__MCNumber *self, __MCNumber *p_other_self)
{
return MCNumberCompareTo(self, p_other_self) == 0;
}
////////////////////////////////////////////////////////////////////////////////
MC_DLLEXPORT_DEF MCNumberRef kMCZero;
MC_DLLEXPORT_DEF MCNumberRef kMCOne;
MC_DLLEXPORT_DEF MCNumberRef kMCMinusOne;
bool __MCNumberInitialize(void)
{
if (!MCNumberCreateWithInteger(0, kMCZero))
return false;
if (!MCNumberCreateWithInteger(1, kMCOne))
return false;
if (!MCNumberCreateWithInteger(-1, kMCMinusOne))
return false;
return true;
}
void __MCNumberFinalize(void)
{
MCValueRelease(kMCZero);
MCValueRelease(kMCOne);
MCValueRelease(kMCMinusOne);
}
////////////////////////////////////////////////////////////////////////////////