/************************************************************************
*
* valcmp.cpp - definitions of the rw_valcmp() family of helper functions
*
* $Id: valcmp.cpp 332687 2005-11-12 00:47:57Z sebor $
*
************************************************************************
*
* Copyright (c) 1994-2005 Quovadx, Inc., acting through its Rogue Wave
* Software division. Licensed under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0. Unless required by
* applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License
* for the specific language governing permissions and limitations under
* the License.
*
**************************************************************************/
// expand _TEST_EXPORT macros
#define _RWSTD_TEST_SRC
#include <cfloat>
#include <valcmp.h>
#include <stdio.h> // for fprintf, stderr
#include <stdlib.h> // for abort
#include <string.h> // for memcmp
/**************************************************************************/
typedef unsigned char UChar;
static const UChar
_rw_upper [] = {
#if 'A' == 0x41
// basic ASCII:
// .0 .1 .2 .3 .4 .5 .6 .7 .8 .9 .a .b .c .d .e .f
// --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
// NUL SOH STX ETX EOT ENQ ACK BEL BS TAB LF VT FF CR SO SI
/* 0. */ "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
// DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US
/* 1. */ "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
// SPC ! " # $ % ' ' ( ) * + , - . /
/* 2. */ "\x20\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f"
// 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
/* 3. */ "\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f"
// A B C D E F G H I J K L M N O
/* 4. */ "\x40\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f"
// P Q R S T U V W X Y Z [ \ ] ^ _
/* 5. */ "\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f"
// ` a b c d e f g h i j k l m n o
/* 6. */ "\x60\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f"
// p q r s t u v w x y z { | } ~ DEL
/* 7. */ "\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x7b\x7c\x7d\x7e\x7f"
// extended ASCII:
/* 8. */ "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f"
/* 9. */ "\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f"
/* a. */ "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf"
/* b. */ "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf"
/* c. */ "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf"
/* d. */ "\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf"
/* e. */ "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef"
/* f. */ "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
#elif 'A' == 0xc1
// EBCDIC:
// .0 .1 .2 .3 .4 .5 .6 .7 .8 .9 .a .b .c .d .e .f
// --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
// NUL SOH STX ETX PF HT LC DEL SMM VT FF CR SO SI
/* 0. */ "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
// DLE DC1 DC2 TM RES NL BS IL CAN EM CC CU1 IFS IGS IRS IUS
/* 1. */ "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
// DS SOS FS BYP LF ETB ESC SM CU2 ENQ ACK BEL
/* 2. */ "\x20\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f"
// SYN PN RS UC EOT CU3 DC4 NAK SUB
/* 3. */ "\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f"
// SP ct. . < ( + |
/* 4. */ "\x40\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f"
// & ! $ * ) ; ~
/* 5. */ "\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f"
// - / , % _ > ?
/* 6. */ "\x60\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f"
// : # @ ' = "
/* 7. */ "\x70\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f"
// a b c d e f g h i
/* 8. */ "\x80\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\x8a\x8b\x8c\x8d\x8e\x8f"
// j k l m n o p q r
/* 9. */ "\x90\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\x9a\x9b\x9c\x9d\x9e\x9f"
// s t u v w x y z
/* a. */ "\xa0\xa1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xaa\xab\xac\xad\xae\xaf"
// `
/* b. */ "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf"
// A B C D E F G H I
/* c. */ "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf"
// J K L M N O P Q R
/* d. */ "\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf"
// S T U V W X Y Z
/* e. */ "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef"
// 0 1 2 3 4 5 6 7 8 9
/* f. */ "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
#else // 'A' != 0x41 && 'A' != 0xc1
# error unknown character set (neither ASCII nor EBCDIC)
#endif // ASCII or EBCDIC
};
// returns 1 iff all size bytes of the object pointed to by buf are 0
static int
_rw_iszero (const void *buf, _RWSTD_SIZE_T size)
{
for (_RWSTD_SIZE_T i = 0; i != size; ++i)
if (_RWSTD_STATIC_CAST (const UChar*, buf)[i])
return 0;
return 1;
}
// compares two objects of equal size
static int
_rw_cmpx (const void *buf1,
const void *buf2,
_RWSTD_SIZE_T nelems,
_RWSTD_SIZE_T size,
int flags = 0)
{
const UChar *p1 = _RWSTD_STATIC_CAST (const UChar*, buf1);
const UChar *p2 = _RWSTD_STATIC_CAST (const UChar*, buf2);
int ret = 0;
for ( ; nelems; p1 += size, p2 += size, --nelems) {
ret = memcmp (p1, p2, size);
if (flags & CMP_NULTERM) {
const int zero1 = _rw_iszero (p1, size);
const int zero2 = _rw_iszero (p2, size);
if (zero1 || zero2) {
ret = zero1 - zero2;
break;
}
}
if (ret && (flags & CMP_NOCASE)) {
// FIXME: implement
fprintf (stderr,
"%s:%d: case insensitive comparison not implemented\n",
__FILE__, __LINE__);
abort ();
}
}
if (flags & CMP_RETOFF) {
// FIXME: implement
fprintf (stderr,
"%s:%d: returning offset not implemented\n",
__FILE__, __LINE__);
abort ();
}
return ret < 0 ? -1 : ret ? +1 : 0;
}
// compares two byte arrays
static int
_rw_cmp1 (const void *buf1,
const void *buf2,
_RWSTD_SIZE_T nelems,
int flags = 0)
{
#ifdef _RWSTD_UINT8_T
typedef _RWSTD_UINT8_T UI8T;
if (0 == flags) {
const int ret = memcmp (buf1, buf2, nelems);
return ret < 0 ? -1 : ret ? +1 : 0;
}
if (CMP_NULTERM == flags) {
const int ret =
strncmp (_RWSTD_STATIC_CAST (const char*, buf1),
_RWSTD_STATIC_CAST (const char*, buf2),
nelems);
return ret < 0 ? -1 : ret ? +1 : 0;
}
int ret = 0;
int inx = 0;
const UI8T *pi1 = _RWSTD_STATIC_CAST (const UI8T*, buf1);
const UI8T *pi2 = _RWSTD_STATIC_CAST (const UI8T*, buf2);
for (; nelems; ++pi1, ++pi2, --nelems, ++inx) {
const UI8T ui1 = *pi1;
const UI8T ui2 = *pi2;
if (flags & CMP_NULTERM) {
if (0 == ui1) {
ret = ui2 ? -1 : 0;
break;
}
if (0 == ui2) {
ret = +1;
break;
}
}
if (ui1 != ui2) {
if (flags & CMP_NOCASE) {
if (_rw_upper [ui1] != _rw_upper [ui2]) {
ret = _rw_upper [ui1] < _rw_upper [ui2] ? -1 : +1;
break;
}
}
else {
ret = ui1 < ui2 ? -1 : +1;
break;
}
}
}
if (CMP_RETOFF & flags) {
ret = _RWSTD_STATIC_CAST (_RWSTD_SIZE_T, inx) < nelems ? inx : -1;
}
return ret;
#else // if !defined (_RWSTD_UINT8_T)
# error _RWSTD_UINT8_T not #defined (configuration problem?)
#endif // _RWSTD_UINT8_T
}
// compares two arrays of objects each 16 bits in size
static int
_rw_cmp2 (const void *buf1,
const void *buf2,
_RWSTD_SIZE_T nelems,
int flags = 0)
{
#ifdef _RWSTD_UINT16_T
typedef _RWSTD_UINT16_T UI16T;
int ret = 0;
int inx = 0;
const UI16T *pi1 = _RWSTD_STATIC_CAST (const UI16T*, buf1);
const UI16T *pi2 = _RWSTD_STATIC_CAST (const UI16T*, buf2);
for (; nelems; ++pi1, ++pi2, --nelems) {
const UI16T ui1 = *pi1;
const UI16T ui2 = *pi2;
if (flags & CMP_NULTERM) {
if (0 == ui1) {
ret = ui2 ? -1 : 0;
break;
}
if (0 == ui2) {
ret = +1;
break;
}
}
if (ui1 != ui2) {
if (flags & CMP_NOCASE) {
if (_RWSTD_UCHAR_MAX < ui1 || _RWSTD_UCHAR_MAX < ui2) {
ret = ui1 < ui2 ? -1 : +1;
break;
}
else if (_rw_upper [ui1] != _rw_upper [ui2]) {
ret = _rw_upper [ui1] < _rw_upper [ui2] ? -1 : +1;
break;
}
}
else {
ret = ui1 < ui2 ? -1 : +1;
break;
}
}
}
if (CMP_RETOFF & flags) {
ret = _RWSTD_STATIC_CAST (_RWSTD_SIZE_T, inx) < nelems ? inx : -1;
}
return ret;
#else // if !defined (_RWSTD_UINT16_T)
return _rw_cmpx (buf1, buf2, nelems, 2, flags);
#endif // _RWSTD_UINT16_T
}
// compares two arrays of objects each 32 bits in size
static int
_rw_cmp4 (const void *buf1,
const void *buf2,
_RWSTD_SIZE_T nelems,
int flags = 0)
{
#ifdef _RWSTD_UINT32_T
typedef _RWSTD_UINT32_T UI32T;
int ret = 0;
int inx = 0;
const UI32T *pi1 = _RWSTD_STATIC_CAST (const UI32T*, buf1);
const UI32T *pi2 = _RWSTD_STATIC_CAST (const UI32T*, buf2);
for (; nelems; ++pi1, ++pi2, --nelems) {
const UI32T ui1 = *pi1;
const UI32T ui2 = *pi2;
if (flags & CMP_NULTERM) {
if (0 == ui1) {
ret = ui2 ? -1 : 0;
break;
}
if (0 == ui2) {
ret = +1;
break;
}
}
if (ui1 != ui2) {
if (flags & CMP_NOCASE) {
if (_RWSTD_UCHAR_MAX < ui1 || _RWSTD_UCHAR_MAX < ui2) {
ret = ui1 < ui2 ? -1 : +1;
break;
}
else if (_rw_upper [ui1] != _rw_upper [ui2]) {
ret = _rw_upper [ui1] < _rw_upper [ui2] ? -1 : +1;
break;
}
}
else {
ret = ui1 < ui2 ? -1 : +1;
break;
}
}
}
if (CMP_RETOFF & flags) {
ret = _RWSTD_STATIC_CAST (_RWSTD_SIZE_T, inx) < nelems ? inx : -1;
}
return ret;
#else // if !defined (_RWSTD_UINT32_T)
return _rw_cmpx (buf1, buf2, nelems, 4, flags);
#endif // _RWSTD_UINT32_T
}
// compares two arrays of objects each 64 bits in size
static int
_rw_cmp8 (const void *buf1,
const void *buf2,
_RWSTD_SIZE_T nelems,
int flags = 0)
{
#ifdef _RWSTD_UINT64_T
typedef _RWSTD_UINT64_T UI64T;
int ret = 0;
int inx = 0;
const UI64T *pi1 = _RWSTD_STATIC_CAST (const UI64T*, buf1);
const UI64T *pi2 = _RWSTD_STATIC_CAST (const UI64T*, buf2);
for (; nelems; ++pi1, ++pi2, --nelems) {
const UI64T ui1 = *pi1;
const UI64T ui2 = *pi2;
if (flags & CMP_NULTERM) {
if (0 == ui1) {
ret = ui2 ? -1 : 0;
break;
}
if (0 == ui2) {
ret = +1;
break;
}
}
if (ui1 != ui2) {
if (flags & CMP_NOCASE) {
if (_RWSTD_UCHAR_MAX < ui1 || _RWSTD_UCHAR_MAX < ui2) {
ret = ui1 < ui2 ? -1 : +1;
break;
}
else if (_rw_upper [ui1] != _rw_upper [ui2]) {
ret = _rw_upper [ui1] < _rw_upper [ui2] ? -1 : +1;
break;
}
}
else {
ret = ui1 < ui2 ? -1 : +1;
break;
}
}
}
if (CMP_RETOFF & flags) {
ret = _RWSTD_STATIC_CAST (_RWSTD_SIZE_T, inx) < nelems ? inx : -1;
}
return ret;
#else // if !defined (_RWSTD_UINT64_T)
return _rw_cmpx (buf1, buf2, nelems, 8, flags);
#endif // _RWSTD_UINT64_T
}
// compares two arrays of objects of unequal size
static int
_rw_cmpxx (const void* buf1,
const void* buf2,
_RWSTD_SIZE_T nelems,
_RWSTD_SIZE_T size1,
_RWSTD_SIZE_T size2,
int flags)
{
int ret = 0;
int inx = 0;
for (; nelems; --nelems, ++inx) {
#ifdef _RWSTD_UINT64_T
_RWSTD_UINT64_T ui1;
_RWSTD_UINT64_T ui2;
#else // if !defined (_RWSTD_UINT64_T)
_RWSTD_SIZE_T ui1;
_RWSTD_SIZE_T ui2;
#endif // _RWSTD_UINT64_T
switch (size1) {
#ifdef _RWSTD_UINT8_T
case 1: {
const _RWSTD_UINT8_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT8_T*, buf1);
ui1 = *ptr++;
buf1 = ptr;
break;
}
#endif // _RWSTD_UINT8_T
#ifdef _RWSTD_UINT16_T
case 2: {
const _RWSTD_UINT16_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT16_T*, buf1);
ui1 = *ptr++;
buf1 = ptr;
break;
}
#endif // _RWSTD_UINT16_T
#ifdef _RWSTD_UINT32_T
case 4: {
const _RWSTD_UINT32_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT32_T*, buf1);
ui1 = *ptr++;
buf1 = ptr;
break;
}
#endif // _RWSTD_UINT32_T
#ifdef _RWSTD_UINT64_T
case 8: {
const _RWSTD_UINT64_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT64_T*, buf1);
ui1 = *ptr++;
buf1 = ptr;
break;
}
#endif // _RWSTD_UINT64_T
default:
fprintf (stderr,
"%s:%d: comparison of objects %u and %u bytes in size "
"not implemented\n", __FILE__, __LINE__,
unsigned (size1), unsigned (size2));
abort ();
}
switch (size2) {
#ifdef _RWSTD_UINT8_T
case 1: {
const _RWSTD_UINT8_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT8_T*, buf2);
ui2 = *ptr++;
buf2 = ptr;
break;
}
#endif // _RWSTD_UINT8_T
#ifdef _RWSTD_UINT16_T
case 2: {
const _RWSTD_UINT16_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT16_T*, buf2);
ui2 = *ptr++;
buf2 = ptr;
break;
}
#endif // _RWSTD_UINT16_T
#ifdef _RWSTD_UINT32_T
case 4: {
const _RWSTD_UINT32_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT32_T*, buf2);
ui2 = *ptr++;
buf2 = ptr;
break;
}
#endif // _RWSTD_UINT32_T
#ifdef _RWSTD_UINT64_T
case 8: {
const _RWSTD_UINT64_T* ptr =
_RWSTD_STATIC_CAST (const _RWSTD_UINT64_T*, buf2);
ui2 = *ptr++;
buf2 = ptr;
break;
}
#endif // _RWSTD_UINT64_T
default:
fprintf (stderr,
"%s:%d: comparison of objects %u and %u bytes in size "
"not implemented\n", __FILE__, __LINE__,
unsigned (size1), unsigned (size2));
abort ();
}
if (flags & CMP_NULTERM) {
if (0 == ui1) {
ret = ui2 ? -1 : 0;
break;
}
if (0 == ui2) {
ret = +1;
break;
}
}
if (ui1 != ui2) {
if (flags & CMP_NOCASE) {
if (_RWSTD_UCHAR_MAX < ui1 || _RWSTD_UCHAR_MAX < ui2) {
ret = ui1 < ui2 ? -1 : +1;
break;
}
else if (_rw_upper [ui1] != _rw_upper [ui2]) {
ret = _rw_upper [ui1] < _rw_upper [ui2] ? -1 : +1;
break;
}
}
else {
ret = ui1 < ui2 ? -1 : +1;
break;
}
}
}
if (CMP_RETOFF & flags) {
ret = _RWSTD_STATIC_CAST (_RWSTD_SIZE_T, inx) < nelems ? inx : -1;
}
return ret;
}
_TEST_EXPORT int
rw_valcmp (const void* buf1,
const void* buf2,
_RWSTD_SIZE_T nelems,
_RWSTD_SIZE_T size1,
_RWSTD_SIZE_T size2,
int flags /* = 0 */)
{
if (size1 == size2) {
switch (size1) {
case 1: return _rw_cmp1 (buf1, buf2, nelems, flags);
case 2: return _rw_cmp2 (buf1, buf2, nelems, flags);
case 4: return _rw_cmp4 (buf1, buf2, nelems, flags);
case 8: return _rw_cmp8 (buf1, buf2, nelems, flags);
}
return _rw_cmpx (buf1, buf2, nelems, size1, flags);
}
return _rw_cmpxx (buf1, buf2, nelems, size1, size2, flags);
}
_TEST_EXPORT int
rw_strncmp (const char* str1,
const char* str2,
_RWSTD_SIZE_T nelems /* = _RWSTD_SIZE_MAX */,
int flags /* = CMP_NULTERM */)
{
return rw_valcmp (str1, str2, nelems, 1, 1, flags);
}
#ifndef _RWSTD_NO_WCHAR_T
_TEST_EXPORT int
rw_strncmp (const char* str1,
const wchar_t* str2,
_RWSTD_SIZE_T nelems /* = _RWSTD_SIZE_MAX */,
int flags /* = CMP_NULTERM */)
{
return rw_valcmp (str1, str2, nelems, 1, sizeof (wchar_t), flags);
}
_TEST_EXPORT int
rw_strncmp (const wchar_t* str1,
const char* str2,
_RWSTD_SIZE_T nelems /* = _RWSTD_SIZE_MAX */,
int flags /* = CMP_NULTERM */)
{
return rw_valcmp (str1, str2, nelems, sizeof (wchar_t), 1, flags);
}
_TEST_EXPORT int
rw_strncmp (const wchar_t* str1,
const wchar_t* str2,
_RWSTD_SIZE_T nelems /* = _RWSTD_SIZE_MAX */,
int flags /* = CMP_NULTERM */)
{
return rw_valcmp (str1, str2, nelems,
sizeof (wchar_t), sizeof (wchar_t), flags);
}
#endif // _RWSTD_NO_WCHAR_T
// floating point comparison helpers based on
// http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm
_TEST_EXPORT int
rw_fltcmp (float x, float y)
{
#if _RWSTD_SHRT_SIZE == _RWSTD_INT_SIZE
typedef short IntT;
#ifdef __ARMCC__
#pragma diag_suppress 68
#endif
const IntT imin = _RWSTD_SHRT_MIN;
#elif _RWSTD_FLT_SIZE == _RWSTD_INT_SIZE
typedef int IntT;
const IntT imin = _RWSTD_INT_MIN;
#elif _RWSTD_FLT_SIZE == _RWSTD_LONG_SIZE
typedef long IntT;
const IntT imin = _RWSTD_LONG_MIN;
#elif _RWSTD_FLT_SIZE == _RWSTD_LLONG_SIZE
typedef _RWSTD_LONG_LONG IntT;
const IntT imin = _RWSTD_LLONG_MIN;
#else
// ???
# error no integral type of the same size as float exists
#endif
if (x == y)
return 0;
// make both arguments lexicographically ordered as twos-complement ints
IntT x_int = *(IntT*)&x;
if (x_int < 0)
x_int = imin - x_int;
IntT y_int = *(IntT*)&y;
if (y_int < 0)
y_int = imin - y_int;
const IntT int_diff = x_int - y_int;
return int_diff;
}
#define Abs(x) ((x) < 0 ? -(x) : (x))
_TEST_EXPORT int
rw_dblcmp (double x, double y)
{
#if _RWSTD_DBL_SIZE == _RWSTD_INT_SIZE
typedef int IntT;
const IntT imin = _RWSTD_INT_MIN;
#elif _RWSTD_DBL_SIZE == _RWSTD_LONG_SIZE
typedef long IntT;
const IntT imin = _RWSTD_LONG_MIN;
#elif _RWSTD_DBL_SIZE == _RWSTD_LLONG_SIZE
typedef _RWSTD_LONG_LONG IntT;
const IntT imin = _RWSTD_LLONG_MIN;
#endif
#if _RWSTD_LLONG_SIZE < _RWSTD_DBL_SIZE
if (x == y)
return 0;
// FIXME: use integer math as in the functions above
const double diff = x - y;
// check absolute error
if (Abs (diff) < _RWSTD_DBL_EPSILON)
return 0;
// check relative error
const double relerr =
Abs (x) < Abs (y) ? Abs (diff / y) : Abs (diff / x);
if (relerr <= 0.0000001)
return 0;
return x < y ? -1 : +1;
#else // if !(_RWSTD_LLONG_SIZE < _RWSTD_DBL_SIZE)
if (x == y)
return 0;
IntT x_int = *(IntT*)&x;
if (x_int < 0)
x_int = imin - x_int;
IntT y_int = *(IntT*)&y;
if (y_int < 0)
y_int = imin - y_int;
const IntT int_diff = x_int - y_int;
return int_diff;
#endif // _RWSTD_LLONG_SIZE < _RWSTD_DBL_SIZE
}
#ifndef _RWSTD_NO_LONG_DOUBLE
_TEST_EXPORT int
rw_ldblcmp (long double x, long double y)
{
if (sizeof (long double) == sizeof (double))
return rw_dblcmp (double (x), double (y));
#ifdef __ARMCC__
#pragma diag_suppress 111
#endif
if (x == y)
return 0;
// FIXME: use integer math as in the functions above
const long double diff = x - y;
// check absolute error
if (Abs (diff) < _RWSTD_LDBL_EPSILON)
return 0;
// check relative error
const long double relerr =
Abs (x) < Abs (y) ? Abs (diff / y) : Abs (diff / x);
if (relerr <= 0.0000001L)
return 0;
return x < y ? -1 : +1;
}
#endif // _RWSTD_NO_LONG_DOUBLE
#ifdef __SYMBIAN32__
_TEST_EXPORT int
rw_strcmp (std::basic_string<char>& x ,/*std::basic_string<char> */ long double y)
{
const char * c= x.c_str();
/*if(x.compare(y)==0)
return 0;
else
return x.compare(y)<0?-1:+1; */
float z=atof(c);
if ((long double)z == y)
return 0;
// FIXME: use integer math as in the functions above
const long double diff =((long double)z) - y;
// check absolute error
if (Abs (diff) < _RWSTD_LDBL_EPSILON)
return 0;
// check relative error
const long double relerr =
Abs ((long double)z) < Abs (y) ? Abs (diff / y) : Abs (diff /(long double)z);
if (relerr <= 0.0000001L)
return 0;
return z < y ? -1 : +1;
}
_TEST_EXPORT int
rw_strcmp (std::basic_string<wchar_t>& x ,long double y)
{
/* if(x.compare(y)==0)
return 0;
else
return x.compare(y)<0?-1:+1; */
int len=x.length();
const wchar_t *w=x.c_str();
char c[128];
WCtoC(w,len,c);
float z=atof(c);
if ((long double)z == y)
return 0;
// FIXME: use integer math as in the functions above
const long double diff =((long double)z) - y;
// check absolute error
if (Abs (diff) < _RWSTD_LDBL_EPSILON)
return 0;
// check relative error
const long double relerr =
Abs ((long double)z) < Abs (y) ? Abs (diff / y) : Abs (diff /(long double)z);
if (relerr <= 0.0000001L)
return 0;
return z < y ? -1 : +1;
}
_TEST_EXPORT
void WCtoC(const wchar_t *wstr, int len, char* str)
{
int i = 0;
for (;i<len;i++)
str[i] = wstr[i];
}
#endif