pegasus/src/Pegasus/Common/String.cpp - diff

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Diff for /pegasus/src/Pegasus/Common/String.cpp between version 1.28 and 1.111.6.15

version 1.28, 2001/07/16 01:35:16

version 1.111.6.15, 2005/10/14 14:09:29

Line 1

//%/////////////////////////////////////////////////////////////////////////////

//%2005////////////////////////////////////////////////////////////////////////

// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.

// IBM Corp.; EMC Corporation, The Open Group.

// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; VERITAS Software Corporation; The Open Group.

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to

Line 20

Line 27

//==============================================================================

// Author: Mike Brasher (mbrasher@bmc.com)

// Author: Mike Brasher (mbrasher@austin.rr.com)

// Modified By:

// Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)

// Josephine Eskaline Joyce, IBM (jojustin@in.ibm.com) for Bug#3297

// David Dillard, VERITAS Software Corp. (david.dillard@veritas.com)

// Mike Brasher (mike-brasher@austin.rr.com)

//%/////////////////////////////////////////////////////////////////////////////

#include <cassert>

#include "InternalException.h"

#include "CommonUTF.h"

#include "MessageLoader.h"

#include "StringRep.h"

#ifdef PEGASUS_HAS_ICU

#include <unicode/ustring.h>

#include <unicode/uchar.h>

#endif

#include <cctype>

PEGASUS_NAMESPACE_BEGIN

#include "String.h"

#include "Exception.h"

#include "String.h"

#include <iostream>

PEGASUS_USING_STD;

//==============================================================================

// Compile-time macros (undefined by default).

// PEGASUS_STRING_NO_THROW -- suppresses throwing of exceptions

// PEGASUS_STRING_NO_UTF8 -- don't generate slower UTF8 code.

//==============================================================================

PEGASUS_NAMESPACE_BEGIN

//==============================================================================

// File-scope definitions:

//==============================================================================

#define PEGASUS_ARRAY_T String

// Note: this table is much faster than the system toupper(). Please do not

#include <Pegasus/Common/ArrayImpl.h>

// change.

#undef PEGASUS_ARRAY_T

const String String::EMPTY;

const Uint8 _toUpperTable[256] =

{

0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,

0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,

0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,

0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,

0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,

0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,

0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,

0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,

0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,

0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,

0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,

0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,

0x60,0x41,0x42,0x43,0x44,0x45,0x46,0x47,

0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,

0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,

0x58,0x59,0x5A,0x7B,0x7C,0x7D,0x7E,0x7F,

0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,

0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,

0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,

0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,

0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,

0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,

0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,

0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,

0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,

0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,

0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,

0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,

0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,

0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,

0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,

0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,

};

// Note: this table is much faster than the system tulower(). Please do not

// change.

const Uint8 _toLowerTable[256] =

{

0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,

0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,

0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,

0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,

0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,

0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,

0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,

0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,

0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,

0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,

0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,

0x78,0x79,0x7A,0x5B,0x5C,0x5D,0x5E,0x5F,

0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,

0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,

0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,

0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,

0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,

0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,

0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,

0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,

0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,

0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,

0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,

0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,

0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,

0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,

0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,

0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,

0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,

0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,

0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,

0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,

};

// Converts 16-bit characters to upper case. This routine is faster than the

// system toupper(). Please do not change.

inline Uint16 _toUpper(Uint16 x)

{

return (x & 0xFF00) ? x : _toUpperTable[x];

}

// Converts 16-bit characters to lower case. This routine is faster than the

// system toupper(). Please do not change.

inline Uint16 _toLower(Uint16 x)

{

return (x & 0xFF00) ? x : _toLowerTable[x];

}

// Rounds x up to the nearest power of two (or just returns 8 if x < 8).

static Uint32 _roundUpToPow2(Uint32 x)

{

#ifndef PEGASUS_STRING_NO_THROW

if (x > 0x0FFFFFFF)

throw PEGASUS_STD(bad_alloc)();

#endif

if (x < 8)

return 8;

x--;

x |= (x >> 1);

x |= (x >> 2);

x |= (x >> 4);

x |= (x >> 8);

x |= (x >> 16);

x++;

return x;

}

template<class P, class Q>

static void _copy(P* p, const Q* q, size_t n)

{

// The following employs loop unrolling for efficiency. Please do not

// eliminate.

while (n >= 8)

{

p[0] = q[0];

p[1] = q[1];

p[2] = q[2];

p[3] = q[3];

p[4] = q[4];

p[5] = q[5];

p[6] = q[6];

p[7] = q[7];

p += 8;

q += 8;

n -= 8;

}

while (n >= 4)

{

p[0] = q[0];

p[1] = q[1];

p[2] = q[2];

p[3] = q[3];

p += 4;

q += 4;

n -= 4;

}

static inline void _SkipWhitespace(const Char16*& p)

while (n--)

*p++ = *q++;

}

static Uint16* _find(const Uint16* s, size_t n, Uint16 c)

{

while (*p && isspace(*p))

// The following employs loop unrolling for efficiency. Please do not

p++;

// eliminate.

while (n >= 4)

{

if (s[0] == c)

return (Uint16*)s;

if (s[1] == c)

return (Uint16*)&s[1];

if (s[2] == c)

return (Uint16*)&s[2];

if (s[3] == c)

return (Uint16*)&s[3];

n -= 4;

s += 4;

}

inline Uint32 StrLen(const char* str)

if (n)

{

if (!str)

if (*s == c)

throw NullPointer();

return (Uint16*)s;

s++;

n--;

}

return strlen(str);

if (n)

{

if (*s == c)

return (Uint16*)s;

s++;

n--;

}

inline Uint32 StrLen(const Char16* str)

if (n && *s == c)

return (Uint16*)s;

// Not found!

return 0;

}

static int _compare(const Uint16* s1, const Uint16* s2)

{

if (!str)

while (*s1 && *s2)

throw NullPointer();

{

int r = *s1++ - *s2++;

Uint32 n = 0;

if (r)

return r;

}

while (*str++)

if (*s2)

n++;

return -1;

else if (*s1)

return 1;

return n;

return 0;

}

String::String()

static int _compareNoUTF8(const Uint16* s1, const char* s2)

{

_rep.append('\0');

Uint16 c1;

Uint16 c2;

{

c1 = *s1++;

c2 = *s2++;

if (c1 == 0)

return c1 - c2;

}

while (c1 == c2);

String::String(const String& x) : _rep(x._rep)

return c1 - c2;

}

static int _compare(const Uint16* s1, const Uint16* s2, size_t n)

{

// This should only be called when s1 and s2 have the same length.

while (n-- && (*s1++ - *s2++) == 0)

;

return s1[-1] - s2[-1];

}

static inline void _copy(Uint16* s1, const Uint16* s2, size_t n)

{

memcpy(s1, s2, n * sizeof(Uint16));

}

String::String(const String& x, Uint32 n)

void StringThrowOutOfBounds()

{

_rep.append('\0');

throw IndexOutOfBoundsException();

append(x.getData(), n);

}

String::String(const Char16* x) : _rep(x, StrLen(x) + 1)

inline void _checkNullPointer(const void* ptr)

{

#ifdef PEGASUS_STRING_NO_THROW

if (!ptr)

throw NullPointer();

#endif

}

String::String(const Char16* x, Uint32 n)

static void _StringThrowBadUTF8(Uint32 index)

{

assign(x, n);

MessageLoaderParms parms(

"Common.String.BAD_UTF8",

"The byte sequence starting at index $0 "

"is not valid UTF-8 encoding.",

index);

throw Exception(parms);

}

String::String(const char* str)

static size_t _copyFromUTF8(

Uint16* dest,

const char* src,

size_t n,

size_t& utf8_error_index)

{

Uint32 n = ::strlen(str) + 1;

Uint16* p = dest;

reserve(n);

const Uint8* q = (const Uint8*)src;

while (n--)

// Process leading 7-bit ASCII characters (to avoid UTF8 overhead later).

_rep.append(*str++);

// Use loop-unrolling.

while (n >=8 && ((q[0]|q[1]|q[2]|q[3]|q[4]|q[5]|q[6]|q[7]) & 0x80) == 0)

{

p[0] = q[0];

p[1] = q[1];

p[2] = q[2];

p[3] = q[3];

p[4] = q[4];

p[5] = q[5];

p[6] = q[6];

p[7] = q[7];

p += 8;

q += 8;

n -= 8;

}

String::String(const char* str, Uint32 n_)

while (n >=4 && ((q[0]|q[1]|q[2]|q[3]) & 0x80) == 0)

{

Uint32 n = _min(strlen(str), n_);

p[0] = q[0];

reserve(n + 1);

p[1] = q[1];

p[2] = q[2];

p[3] = q[3];

p += 4;

q += 4;

n -= 4;

}

while (n--)

switch (n)

_rep.append(*str++);

{

case 0:

return p - dest;

case 1:

if (q[0] < 128)

{

p[0] = q[0];

return p + 1 - dest;

}

break;

case 2:

if (((q[0]|q[1]) & 0x80) == 0)

{

p[0] = q[0];

p[1] = q[1];

return p + 2 - dest;

}

break;

case 3:

if (((q[0]|q[1]|q[2]) & 0x80) == 0)

{

p[0] = q[0];

p[1] = q[1];

p[2] = q[2];

return p + 3 - dest;

}

break;

}

// Process remaining characters.

_rep.append('\0');

while (n)

{

// Optimize for 7-bit ASCII case.

if (*q < 128)

{

*p++ = *q++;

n--;

}

else

{

Uint8 c = UTF_8_COUNT_TRAIL_BYTES(*q) + 1;

String& String::assign(const Char16* x)

if (c > n || !isValid_U8(q, c) ||

UTF8toUTF16(&q, q + c, &p, p + n) != 0)

{

_rep.clear();

utf8_error_index = q - (const Uint8*)src;

_rep.append(x, StrLen(x) + 1);

return size_t(-1);

return *this;

}

String& String::assign(const Char16* str, Uint32 n)

n -= c;

}

return p - dest;

}

// Note: dest must be at least three times src (plus an extra byte for

// terminator).

static inline size_t _copyToUTF8(char* dest, const Uint16* src, size_t n)

{

_rep.clear();

// The following employs loop unrolling for efficiency. Please do not

Uint32 m = _min(StrLen(str), n);

// eliminate.

_rep.append(str, m);

_rep.append('\0');

const Uint16* q = src;

return *this;

Uint8* p = (Uint8*)dest;

while (n >= 4 && q[0] < 128 && q[1] < 128 && q[2] < 128 && q[3] < 128)

{

p[0] = q[0];

p[1] = q[1];

p[2] = q[2];

p[3] = q[3];

p += 4;

q += 4;

n -= 4;

}

String& String::assign(const char* x)

switch (n)

{

case 0:

return p - (Uint8*)dest;

case 1:

if (q[0] < 128)

{

p[0] = q[0];

return p + 1 - (Uint8*)dest;

}

break;

case 2:

if (q[0] < 128 && q[1] < 128)

{

_rep.clear();

p[0] = q[0];

Uint32 n = strlen(x);

p[1] = q[1];

_rep.reserve(n + 1);

return p + 2 - (Uint8*)dest;

}

break;

case 3:

if (q[0] < 128 && q[1] < 128 && q[2] < 128)

{

p[0] = q[0];

p[1] = q[1];

p[2] = q[2];

return p + 3 - (Uint8*)dest;

}

break;

}

while (n--)

// If this line was reached, there must be characters greater than 128.

_rep.append(*x++);

_rep.append('\0');

UTF16toUTF8(&q, q + n, &p, p + 3 * n);

return *this;

return p - (Uint8*)dest;

}

String& String::assign(const char* x, Uint32 n_)

static inline size_t _convert(

Uint16* p, const char* q, size_t n, size_t& utf8_error_index)

{

_rep.clear();

#ifdef PEGASUS_STRING_NO_UTF8

_copy(p, q, n);

return n;

#else

return _copyFromUTF8(p, q, n, utf8_error_index);

#endif

}

//==============================================================================

// class CString

//==============================================================================

Uint32 n = _min(strlen(x), n_);

CString::CString(const CString& cstr) : _rep(0)

_rep.reserve(n + 1);

{

if (cstr._rep)

{

size_t n = strlen(cstr._rep) + 1;

_rep = (char*)operator new(n);

memcpy(_rep, cstr._rep, n);

}

while (n--)

CString& CString::operator=(const CString& cstr)

_rep.append(*x++);

{

if (&cstr != this)

{

if (_rep)

{

operator delete(_rep);

_rep = 0;

}

_rep.append('\0');

if (cstr._rep)

{

size_t n = strlen(cstr._rep) + 1;

_rep = (char*)operator new(n);

memcpy(_rep, cstr._rep, n);

}

return *this;

}

char* String::allocateCString(Uint32 extraBytes, Boolean noThrow) const

//==============================================================================

{

Uint32 n = size() + 1;

// class StringRep

char* str = new char[n + extraBytes];

char* p = str;

//==============================================================================

const Char16* q = getData();

StringRep StringRep::_emptyRep;

for (Uint32 i = 0; i < n; i++)

inline StringRep* StringRep::alloc(size_t cap)

{

Uint16 c = *q++;

#ifndef PEGASUS_STRING_NO_THROW

*p++ = char(c);

// Any string bigger than this is seriously suspect.

if (cap > 0x0FFFFFFF)

throw PEGASUS_STD(bad_alloc)();

if ((c & 0xff00) && !noThrow)

#endif

throw TruncatedCharacter();

StringRep* rep = (StringRep*)::operator new(

sizeof(StringRep) + cap * sizeof(Uint16));

rep->cap = cap;

new(&rep->refs) AtomicInt(1);

return rep;

}

return str;

static inline void _reserve(StringRep*& rep, Uint32 cap)

{

if (cap > rep->cap || rep->refs.value() != 1)

{

size_t n = _roundUpToPow2(cap);

StringRep* newRep = StringRep::alloc(n);

newRep->size = rep->size;

_copy(newRep->data, rep->data, rep->size + 1);

StringRep::unref(rep);

rep = newRep;

}

void String::appendToCString(

StringRep* StringRep::create(const Uint16* data, size_t size)

char* str,

Uint32 length,

Boolean noThrow) const

{

if (!str)

StringRep* rep = StringRep::alloc(size);

throw NullPointer();

rep->size = size;

_copy(rep->data, data, size);

rep->data[size] = '\0';

return rep;

}

Uint32 n = _min(size(), length);

StringRep* StringRep::copyOnWrite(StringRep* rep)

{

// Return a new copy of rep. Release rep.

char* p = str + strlen(str);

StringRep* newRep = StringRep::alloc(rep->size);

const Char16* q = getData();

newRep->size = rep->size;

_copy(newRep->data, rep->data, rep->size);

newRep->data[newRep->size] = '\0';

StringRep::unref(rep);

return newRep;

}

for (Uint32 i = 0; i < n; i++)

StringRep* StringRep::create(const char* data, size_t size)

{

Uint16 c = *q++;

StringRep* rep = StringRep::alloc(size);

*p++ = char(c);

size_t utf8_error_index;

rep->size = _convert((Uint16*)rep->data, data, size, utf8_error_index);

if ((c & 0xff00) && !noThrow)

#ifndef PEGASUS_STRING_NO_THROW

throw TruncatedCharacter();

if (rep->size == size_t(-1))

{

StringRep::free(rep);

_StringThrowBadUTF8(utf8_error_index);

}

#endif

*p = '\0';

rep->data[rep->size] = '\0';

return rep;

}

Char16& String::operator[](Uint32 i)

Uint32 StringRep::length(const Uint16* str)

{

if (i > size())

// Note: We could unroll this but it is rarely called.

ThrowOutOfBounds();

const Uint16* end = (Uint16*)str;

while (*end++)

;

return _rep[i];

return end - str - 1;

}

const Char16 String::operator[](Uint32 i) const

//==============================================================================

// class String

//==============================================================================

const String String::EMPTY;

String::String(const String& str, Uint32 n)

{

if (i > size())

_checkBounds(n, str._rep->size);

ThrowOutOfBounds();

_rep = StringRep::create(str._rep->data, n);

}

return _rep[i];

String::String(const Char16* str)

{

_checkNullPointer(str);

_rep = StringRep::create((Uint16*)str, StringRep::length((Uint16*)str));

}

String& String::append(const Char16* str, Uint32 n)

String::String(const Char16* str, Uint32 n)

{

Uint32 m = _min(StrLen(str), n);

_checkNullPointer(str);

_rep.reserve(_rep.size() + m);

_rep = StringRep::create((Uint16*)str, n);

_rep.remove(_rep.size() - 1);

_rep.append(str, m);

_rep.append('\0');

return *this;

}

void String::remove(Uint32 pos, Uint32 size)

String::String(const char* str)

{

if (size == PEG_NOT_FOUND)

_checkNullPointer(str);

size = this->size() - pos;

if (pos + size > this->size())

// Set this just in case create() throws an exception.

ThrowOutOfBounds();

_rep = &StringRep::_emptyRep;

_rep = StringRep::create(str, strlen(str));

}

if (size)

String::String(const char* str, Uint32 n)

_rep.remove(pos, size);

{

_checkNullPointer(str);

// Set this just in case create() throws an exception.

_rep = &StringRep::_emptyRep;

_rep = StringRep::create(str, n);

}

int String::compare(const Char16* s1, const Char16* s2, Uint32 n)

String::String(const String& s1, const String& s2)

{

while (n--)

size_t n1 = s1._rep->size;

size_t n2 = s2._rep->size;

size_t n = n1 + n2;

_rep = StringRep::alloc(n);

_copy(_rep->data, s1._rep->data, n1);

_copy(_rep->data + n1, s2._rep->data, n2);

_rep->size = n;

_rep->data[n] = '\0';

}

String::String(const String& s1, const char* s2)

{

int r = *s1++ - *s2++;

_checkNullPointer(s2);

size_t n1 = s1._rep->size;

size_t n2 = strlen(s2);

_rep = StringRep::alloc(n1 + n2);

_copy(_rep->data, s1._rep->data, n1);

size_t utf8_error_index;

size_t tmp = _convert((Uint16*)_rep->data + n1, s2, n2, utf8_error_index);

if (r)

#ifndef PEGASUS_STRING_NO_THROW

return r;

if (tmp == size_t(-1))

{

StringRep::free(_rep);

_rep = &StringRep::_emptyRep;

_StringThrowBadUTF8(utf8_error_index);

}

#endif

return 0;

_rep->size = n1 + tmp;

_rep->data[_rep->size] = '\0';

}

int String::compareNoCase(const char* s1, const char* s2, Uint32 n)

String::String(const char* s1, const String& s2)

{

while (n--)

_checkNullPointer(s1);

size_t n1 = strlen(s1);

size_t n2 = s2._rep->size;

_rep = StringRep::alloc(n1 + n2);

size_t utf8_error_index;

size_t tmp = _convert((Uint16*)_rep->data, s1, n1, utf8_error_index);

#ifndef PEGASUS_STRING_NO_THROW

if (tmp == size_t(-1))

{

int r = tolower(*s1++) - tolower(*s2++);

StringRep::free(_rep);

_rep = &StringRep::_emptyRep;

_StringThrowBadUTF8(utf8_error_index);

}

#endif

if (r)

_rep->size = n2 + tmp;

return r;

_copy(_rep->data + n1, s2._rep->data, n2);

_rep->data[_rep->size] = '\0';

}

return 0;

String& String::assign(const String& str)

{

if (_rep != str._rep)

{

StringRep::unref(_rep);

StringRep::ref(_rep = str._rep);

}

return *this;

}

Boolean String::equal(const String& x, const String& y)

String& String::assign(const Char16* str, Uint32 n)

{

if (x.size() != y.size())

_checkNullPointer(str);

return false;

return String::compare(x.getData(), y.getData(), x.size()) == 0;

if (n > _rep->cap || _rep->refs.value() != 1)

{

StringRep::unref(_rep);

_rep = StringRep::alloc(n);

}

Boolean String::equal(const String& x, const Char16* y)

_rep->size = n;

_copy(_rep->data, (Uint16*)str, n);

_rep->data[n] = '\0';

return *this;

}

String& String::assign(const char* str, Uint32 n)

{

if (x.size() != StrLen(y))

_checkNullPointer(str);

return false;

if (n > _rep->cap || _rep->refs.value() != 1)

{

StringRep::unref(_rep);

_rep = StringRep::alloc(n);

}

return String::compare(x.getData(), y, x.size()) == 0;

size_t utf8_error_index;

_rep->size = _convert(_rep->data, str, n, utf8_error_index);

#ifndef PEGASUS_STRING_NO_THROW

if (_rep->size == size_t(-1))

{

StringRep::free(_rep);

_rep = &StringRep::_emptyRep;

_StringThrowBadUTF8(utf8_error_index);

}

#endif

Boolean String::equal(const Char16* x, const String& y)

_rep->data[_rep->size] = 0;

return *this;

}

void String::clear()

{

return equal(y, x);

if (_rep->size)

{

if (_rep->refs.value() == 1)

{

_rep->size = 0;

_rep->data[0] = '\0';

}

else

{

StringRep::unref(_rep);

_rep = &StringRep::_emptyRep;

}

Boolean String::equal(const String& x, const char* y)

void String::reserveCapacity(Uint32 cap)

{

return equal(x, String(y));

_reserve(_rep, cap);

}

Boolean String::equal(const char* x, const String& y)

CString String::getCString() const

{

return equal(String(x), y);

// A UTF8 string can have three times as many characters as its UTF16

// counterpart, so we allocate extra memory for the worst case. In the

// best case, we may need only one third of the memory allocated. But

// downsizing the string afterwards is expensive and unecessary since

// CString objects are usually short-lived (disappearing after only a few

// instructions). CString objects are typically created on the stack as

// means to obtain a char* pointer.

#ifdef PEGASUS_STRING_NO_UTF8

char* str = (char*)operator new(_rep->size + 1);

_copy(str, _rep->data, _rep->size);

str[_rep->size] = '\0';

return CString(str);

#else

Uint32 n = 3 * _rep->size;

char* str = (char*)operator new(n + 1);

size_t size = _copyToUTF8(str, _rep->data, _rep->size);

str[size] = '\0';

return CString(str);

#endif

}

Boolean String::equalNoCase(const String& x, const String& y)

String& String::append(const Char16* str, Uint32 n)

{

if (x.size() != y.size())

_checkNullPointer(str);

return false;

const Char16* p = x.getData();

size_t oldSize = _rep->size;

const Char16* q = y.getData();

size_t newSize = oldSize + n;

_reserve(_rep, newSize);

_copy(_rep->data + oldSize, (Uint16*)str, n);

_rep->size = newSize;

_rep->data[newSize] = '\0';

Uint32 n = x.size();

return *this;

}

while (n--)

String& String::append(const String& str)

{

if (*p <= 127 && *q <= 127)

return append((Char16*)str._rep->data, str._rep->size);

}

String& String::append(const char* str, Uint32 size)

{

if (tolower(*p++) != tolower(*q++))

_checkNullPointer(str);

return false;

size_t oldSize = _rep->size;

size_t cap = oldSize + size;

_reserve(_rep, cap);

size_t utf8_error_index;

size_t tmp = _convert(

(Uint16*)_rep->data + oldSize, str, size, utf8_error_index);

#ifndef PEGASUS_STRING_NO_THROW

if (tmp == size_t(-1))

{

StringRep::free(_rep);

_rep = &StringRep::_emptyRep;

_StringThrowBadUTF8(utf8_error_index);

}

else if (*p++ != *q++)

#endif

return false;

_rep->size += tmp;

_rep->data[_rep->size] = '\0';

return *this;

}

return true;

void String::remove(Uint32 index, Uint32 n)

{

if (n == PEG_NOT_FOUND)

n = _rep->size - index;

_checkBounds(index + n, _rep->size);

if (_rep->refs.value() != 1)

_rep = StringRep::copyOnWrite(_rep);

assert(index + n <= _rep->size);

size_t rem = _rep->size - (index + n);

Uint16* data = _rep->data;

if (rem)

memmove(data + index, data + index + n, rem * sizeof(Uint16));

_rep->size -= n;

data[_rep->size] = '\0';

}

String String::subString(Uint32 pos, Uint32 length) const

String String::subString(Uint32 index, Uint32 n) const

{

if (pos < size())

// Note: this implementation is very permissive but used for

// backwards compatibility.

if (index < _rep->size)

{

if (length == PEG_NOT_FOUND)

if (n == PEG_NOT_FOUND || n > _rep->size - index)

length = size() - pos;

n = _rep->size - index;

return String(getData() + pos, length);

return String((Char16*)_rep->data + index, n);

}

else

return String();

}

Uint32 String::find(Char16 c) const

{

const Char16* first = getData();

Uint16* p = (Uint16*)_find(_rep->data, _rep->size, c);

for (const Char16* p = first; *p; p++)

if (p)

{

return p - _rep->data;

if (*p == c)

return p - first;

}

return PEG_NOT_FOUND;

}

Uint32 String::find(const String& s) const

Uint32 String::find(Uint32 index, Char16 c) const

{

const Char16* pSubStr = s.getData();

_checkBounds(index, _rep->size);

const Char16* pStr = getData();

Uint32 subStrLen = s.size();

if (index >= _rep->size)

Uint32 strLen = size();

return PEG_NOT_FOUND;

// loop to find first char match

Uint16* p = (Uint16*)_find(_rep->data + index, _rep->size - index, c);

Uint32 loc = 0;

for( ; loc <= (strLen-subStrLen); loc++)

if (p)

{

return p - _rep->data;

if (*pStr++ == *pSubStr) // match first char

{

return PEG_NOT_FOUND;

// point to substr 2nd char

const Char16* p = pSubStr + 1;

// Test remaining chars for equal

Uint32 i = 1;

for (; i < subStrLen; i++)

if (*pStr++ != *p++ )

{pStr--; break;} // break from loop

if (i == subStrLen)

return loc;

}

Uint32 StringFindAux(

const StringRep* _rep, const Char16* s, Uint32 n)

{

_checkNullPointer(s);

const Uint16* data = _rep->data;

size_t rem = _rep->size;

while (n <= rem)

{

Uint16* p = (Uint16*)_find(data, rem, s[0]);

if (!p)

break;

if (memcmp(p, s, n * sizeof(Uint16)) == 0)

return p - _rep->data;

p++;

rem -= p - data;

data = p;

}

return PEG_NOT_FOUND;

}

// ATTN:KS 5 apr 2000 Need to add the Char16* version.

Uint32 String::find(const char* s) const

{

_checkNullPointer(s);

// Note: could optimize away creation of temporary, but this is rarely

// called.

return find(String(s));

}

Uint32 String::reverseFind(Char16 c) const

{

const Char16* first = getData();

Uint16 x = c;

const Char16* last = getData() + size();

Uint16* p = _rep->data;

Uint16* q = _rep->data + _rep->size;

while (last != first)

while (q != p)

{

if (*--last == c)

if (*--q == x)

return last - first;

return q - p;

}

return PEG_NOT_FOUND;

Line 400

Line 995

void String::toLower()

{

for (Char16* p = &_rep[0]; *p; p++)

#ifdef PEGASUS_HAS_ICU

if (InitializeICU::initICUSuccessful())

{

if (*p <= 127)

if (_rep->refs.value() != 1)

*p = tolower(*p);

_rep = StringRep::copyOnWrite(_rep);

}

// This will do a locale-insensitive, but context-sensitive convert.

// Since context-sensitive casing looks at adjacent chars, this

// prevents optimizations where the us-ascii is converted before

// calling ICU.

// The string may shrink or expand after the convert.

//// First calculate size of resulting string. u_strToLower() returns

//// only the size when zero is passed as the destination size argument.

UErrorCode err = U_ZERO_ERROR;

int32_t newSize = u_strToLower(

NULL, 0, (UChar*)_rep->data, _rep->size, NULL, &err);

err = U_ZERO_ERROR;

//// Reserve enough space for the result.

if ((Uint32)newSize > _rep->cap)

_reserve(_rep, newSize);

//// Perform the conversion (overlapping buffers are allowed).

u_strToLower((UChar*)_rep->data, newSize,

(UChar*)_rep->data, _rep->size, NULL, &err);

_rep->size = newSize;

return;

}

void String::translate(Char16 fromChar, Char16 toChar)

#endif /* PEGASUS_HAS_ICU */

{

for (Char16* p = &_rep[0]; *p; p++)

if (_rep->refs.value() != 1)

_rep = StringRep::copyOnWrite(_rep);

Uint16* p = _rep->data;

size_t n = _rep->size;

for (; n--; p++)

{

if (*p == fromChar)

if (!(*p & 0xFF00))

*p = toChar;

*p = _toLower(*p);

}

int String::compare(const Char16* s1, const Char16* s2)

void String::toUpper()

{

while (*s1 && *s2)

#ifdef PEGASUS_HAS_ICU

if (InitializeICU::initICUSuccessful())

{

int r = *s1++ - *s2++;

if (_rep->refs.value() != 1)

_rep = StringRep::copyOnWrite(_rep);

if (r)

// This will do a locale-insensitive, but context-sensitive convert.

return r;

// Since context-sensitive casing looks at adjacent chars, this

// prevents optimizations where the us-ascii is converted before

// calling ICU.

// The string may shrink or expand after the convert.

//// First calculate size of resulting string. u_strToUpper() returns

//// only the size when zero is passed as the destination size argument.

UErrorCode err = U_ZERO_ERROR;

int32_t newSize = u_strToUpper(

NULL, 0, (UChar*)_rep->data, _rep->size, NULL, &err);

err = U_ZERO_ERROR;

//// Reserve enough space for the result.

if ((Uint32)newSize > _rep->cap)

_reserve(_rep, newSize);

//// Perform the conversion (overlapping buffers are allowed).

u_strToUpper((UChar*)_rep->data, newSize,

(UChar*)_rep->data, _rep->size, NULL, &err);

_rep->size = newSize;

return;

}

if (*s2)

#endif /* PEGASUS_HAS_ICU */

return -1;

else if (*s1)

return 1;

return 0;

if (_rep->refs.value() != 1)

_rep = StringRep::copyOnWrite(_rep);

Uint16* p = _rep->data;

size_t n = _rep->size;

for (; n--; p++)

*p = _toUpper(*p);

}

PEGASUS_STD(ostream)& operator<<(PEGASUS_STD(ostream)& os, const String& x)

int String::compare(const String& s1, const String& s2, Uint32 n)

{

for (Uint32 i = 0, n = x.size(); i < n; i++)

assert(n <= s1._rep->size);

os << x[i];

assert(n <= s2._rep->size);

return os;

// Ignoring error in which n is greater than s1.size() or s2.size()

return _compare(s1._rep->data, s2._rep->data, n);

}

void String::toLower(char* str)

int String::compare(const String& s1, const String& s2)

{

while (*str)

return _compare(s1._rep->data, s2._rep->data);

tolower(*str++);

}

String ToLower(const String& str)

int String::compare(const String& s1, const char* s2)

{

String tmp(str);

_checkNullPointer(s2);

#ifdef PEGASUS_STRING_NO_UTF8

return _compareNoUTF8(s1._rep->data, s2);

#else

// ATTN: optimize this!

return String::compare(s1, String(s2));

#endif

}

for (Uint32 i = 0, n = tmp.size(); i < n; i++)

int String::compareNoCase(const String& str1, const String& str2)

{

Char16 c = tmp[i];

#ifdef PEGASUS_HAS_ICU

if (c <= 127)

if (InitializeICU::initICUSuccessful())

tmp[i] = tolower(c);

{

return u_strcasecmp(

str1._rep->data, str2._rep->data, U_FOLD_CASE_DEFAULT);

}

return tmp;

#endif /* PEGASUS_HAS_ICU */

}

const Uint16* s1 = str1._rep->data;

const Uint16* s2 = str2._rep->data;

int CompareNoCase(const char* s1, const char* s2)

{

while (*s1 && *s2)

{

int r = tolower(*s1++) - tolower(*s2++);

int r = _toLower(*s1++) - _toLower(*s2++);

if (r)

return r;

Line 481

Line 1156

return 0;

}

Boolean GetLine(PEGASUS_STD(istream)& is, String& line)

Boolean StringEqualNoCase(const String& s1, const String& s2)

{

line.clear();

#ifdef PEGASUS_HAS_ICU

return String::compareNoCase(s1, s2) == 0;

#else /* PEGASUS_HAS_ICU */

Boolean gotChar = false;

// The following employs loop unrolling for efficiency. Please do not

char c;

// eliminate.

while (is.get(c))

Uint16* p = (Uint16*)s1.getChar16Data();

Uint16* q = (Uint16*)s2.getChar16Data();

Uint32 n = s2.size();

while (n >= 8)

{

if (((p[0] - q[0]) && (_toUpper(p[0]) - _toUpper(q[0]))) ||

((p[1] - q[1]) && (_toUpper(p[1]) - _toUpper(q[1]))) ||

((p[2] - q[2]) && (_toUpper(p[2]) - _toUpper(q[2]))) ||

((p[3] - q[3]) && (_toUpper(p[3]) - _toUpper(q[3]))) ||

((p[4] - q[4]) && (_toUpper(p[4]) - _toUpper(q[4]))) ||

((p[5] - q[5]) && (_toUpper(p[5]) - _toUpper(q[5]))) ||

((p[6] - q[6]) && (_toUpper(p[6]) - _toUpper(q[6]))) ||

((p[7] - q[7]) && (_toUpper(p[7]) - _toUpper(q[7]))))

{

gotChar = true;

return false;

}

if (c == '\n')

n -= 8;

break;

p += 8;

q += 8;

}

line.append(c);

while (n >= 4)

{

if (((p[0] - q[0]) && (_toUpper(p[0]) - _toUpper(q[0]))) ||

((p[1] - q[1]) && (_toUpper(p[1]) - _toUpper(q[1]))) ||

((p[2] - q[2]) && (_toUpper(p[2]) - _toUpper(q[2]))) ||

((p[3] - q[3]) && (_toUpper(p[3]) - _toUpper(q[3]))))

{

return false;

}

return gotChar;

n -= 4;

p += 4;

q += 4;

}

String::~String()

while (n--)

{

if (((p[0] - q[0]) && (_toUpper(p[0]) - _toUpper(q[0]))))

return false;

p++;

q++;

}

String& String::assign(const String& x)

return true;

#endif /* PEGASUS_HAS_ICU */

}

Boolean String::equalNoCase(const String& s1, const char* s2)

{

_rep = x._rep;

_checkNullPointer(s2);

return *this;

#if defined(PEGASUS_HAS_ICU)

return String::equalNoCase(s1, String(s2));

#elif defined(PEGASUS_STRING_NO_UTF8)

const Uint16* p1 = (Uint16*)s1._rep->data;

const char* p2 = s2;

size_t n = s1._rep->size;

while (n--)

{

if (!*p2)

return false;

if (_toUpper(*p1++) != _toUpperTable[int(*p2++)])

return false;

}

if (*p2)

return false;

return true;

#else /* PEGASUS_HAS_ICU */

// ATTN: optimize this!

return String::equalNoCase(s1, String(s2));

#endif /* PEGASUS_HAS_ICU */

}

String& String::append(const Char16& c)

Boolean String::equal(const String& s1, const String& s2)

{

_rep.insert(_rep.size() - 1, c);

return s1._rep->size == s2._rep->size && memcmp(s1._rep->data,

return *this;

s2._rep->data, s1._rep->size * sizeof(Uint16)) == 0;

}

void String::clear()

Boolean String::equal(const String& s1, const char* s2)

{

_rep.clear();

#ifdef PEGASUS_STRING_NO_UTF8

_rep.append('\0');

_checkNullPointer(s2);

const Uint16* p = (Uint16*)s1._rep->data;

const char* q = s2;

while (*p && *q)

{

if (*p++ != Uint16(*q++))

return false;

}

void String::print() const

return !(*p || *q);

#else /* PEGASUS_STRING_NO_UTF8 */

return String::equal(s1, String(s2));

#endif /* PEGASUS_STRING_NO_UTF8 */

}

PEGASUS_STD(ostream)& operator<<(PEGASUS_STD(ostream)& os, const String& str)

{

cout << *this << endl;

#if defined(PEGASUS_OS_OS400)

CString cstr = str.getCString();

const char* utf8str = cstr;

os << utf8str;

return os;

#else

#if defined(PEGASUS_HAS_ICU)

if (InitializeICU::initICUSuccessful())

{

char *buf = NULL;

const int size = str.size() * 6;

UnicodeString UniStr(

(const UChar *)str.getChar16Data(), (int32_t)str.size());

Uint32 bufsize = UniStr.extract(0,size,buf);

buf = new char[bufsize+1];

UniStr.extract(0,bufsize,buf);

os << buf;

os.flush();

delete [] buf;

return os;

}

void String::reserve(Uint32 capacity)

#endif // PEGASUS_HAS_ICU

for (Uint32 i = 0, n = str.size(); i < n; i++)

{

_rep.reserve(capacity + 1);

Uint16 code = str[i];

if (code > 0 && !(code & 0xFF00))

os << char(code);

else

{

// Print in hex format:

char buffer[8];

sprintf(buffer, "\\x%04X", code);

os << buffer;

}

return os;

#endif // PEGASUS_OS_OS400

}

const Array<String>& EmptyStringArray()

void StringAppendCharAux(StringRep*& _rep)

{

static Array<String> tmp;

StringRep* tmp;

return tmp;

if (_rep->cap)

{

tmp = StringRep::alloc(2 * _rep->cap);

tmp->size = _rep->size;

_copy(tmp->data, _rep->data, _rep->size);

}

else

{

tmp = StringRep::alloc(8);

tmp->size = 0;

}

StringRep::unref(_rep);

_rep = tmp;

}

PEGASUS_NAMESPACE_END

================================================================================

String optimizations:

1. Added mechanism allowing certain functions to be inlined only when

used by internal Pegasus modules. External modules (i.e., providers)

link to a non-inline version, which allows for binary compatibility.

2. Implemented copy-on-write with atomic increment/decrement. This

yieled a 10% improvement for the 'gc' benchmark and a 11% improvment

for the 'ni1000' benchmark.

3. Employed loop unrolling in several places. For example, see:

static Uint16* _find(const Uint16* s, size_t n, Uint16 c);

4. Used the "empty-rep" optimization (described in whitepaper from the

GCC Developers Summit). This reduced default construction to a simple

pointer assignment.

inline String::String() : _rep(&_emptyRep) { }

5. Implemented Uint16 versions of toupper() and tolower() using tables.

For example:

static const char _upper[] =

{

0,1,2,...255

};

inline Uint16 _toUpper(Uint16 x)

{

return (x & 0xFF00) ? x : _upper[x];

}

This outperforms the system implementation by avoiding an anding

operation.

6. Implemented char* version of the following member functions to

eliminate unecessary creation of anonymous string objects

(temporaries).

String(const String& s1, const char* s2);

String(const char* s1, const String& s2);

String& String::operator=(const char* str);

Uint32 String::find(const char* s) const;

bool String::equal(const String& s1, const char* s2);

static int String::compare(const String& s1, const char* s2);

String& String::append(const char* str);

String& String::append(const char* str, Uint32 size);

static bool String::equalNoCase(const String& s1, const char* s2);

String& operator=(const char* str)

String& String::assign(const char* str)

String& String::append(const char* str)

Boolean operator==(const String& s1, const char* s2)

Boolean operator==(const char* s1, const String& s2)

Boolean operator!=(const String& s1, const char* s2)

Boolean operator!=(const char* s1, const String& s2)

Boolean operator<(const String& s1, const char* s2)

Boolean operator<(const char* s1, const String& s2)

Boolean operator>(const String& s1, const char* s2)

Boolean operator>(const char* s1, const String& s2)

Boolean operator<=(const String& s1, const char* s2)

Boolean operator<=(const char* s1, const String& s2)

Boolean operator>=(const String& s1, const char* s2)

Boolean operator>=(const char* s1, const String& s2)

String operator+(const String& s1, const char* s2)

String operator+(const char* s1, const String& s2)

7. Optimized _roundUpToPow2(), used in rounding the capacity to the next

power of two (algorithm from the book "Hacker's Delight").

static Uint32 _roundUpToPow2(Uint32 x)

{

if (x < 8)

return 8;

x--;

x |= (x >> 1);

x |= (x >> 2);

x |= (x >> 4);

x |= (x >> 8);

x |= (x >> 16);

x++;

return x;

}

8. Implemented "concatenating constructors" to eliminate temporaries

created by operator+(). This scheme employs the "return-value

optimization" described by Stan Lippman.

inline String operator+(const String& s1, const String& s2)

{

return String(s1, s2, 0);

}

9. Experimented to find the optimial initial size for a short string.

Eight seems to offer the best tradeoff between space and time.

10. Inlined all members of the Char16 class.

11. Used Uint16 internally in the String class. This showed no improvememnt

since Char16 was already fully inlined and was essentially reduced to

Uint16 in any case.

12. Implemented conditional logic (#if) allowing error checking logic to

be excluded to better performance. Examples include bounds checking

and null-pointer checking.

13. Used memcpy() and memcmp() where possible. These are implemented using

the rep family of intructions under Intel and are much faster.

14. Used loop unrolling, jump-tables, and short-circuiting to reduce UTF8

copy routine overhead.

15. Added ASCII7 form of the constructor and assign().

String s("hello world", String::ASCII7);

s.assignASCII7("hello world");

This avoids slower UTF8 processing when not needed.

================================================================================

TO-DO:

(+) [DONE] Use PEGASUS_USE_EXPERIMENTAL_INTERFACES

(+) [DONE] Submit BUG-2754 (Windows buffer limit).

(+) [DONE] Eliminate char versions of find() and append().

(+) [DONE] Remove PEGASUS_MAX_PRINTABLE_CHARACTER from Config.h

(+) [DONE] Change _next_pow_2() to _roundUpToPow2().

(+) [DONE] Change '99' to '2' in StringRep constructor (comment as well).

(+) [DONE] Comment StringRep allocation layout.

(+) [DONE] Conceal private inline functions.

(+) [DONE] Shorten inclusion of StringInline.h in String.h.

(+) [DONE] Change USE_INTERNAL_INLINE TO DISABLE_INTERNAL_INLINE or get

rid of altogether.

(+) [DONE] useCamelNotationOnAllFunctionNames.

(+) [DONE] Check for overlow condition in StringRep::alloc().

(+) [DONE] Remove tabs (used vim ":set expandtab" and ":retab").

(+) [DONE] Fix throw-related memory leak.

(+) [DONE] Look at PEP223 for coding security guidelines.

(+) [DONE] Use old AtomicInt for now (split new AtomicInt into another

bug.

(+) [DONE] Removed appendASCII() and the ASCII form of the constructor.

-----------

(+) DOC++ String.h

================================================================================

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