881 lines
18 KiB
C++
881 lines
18 KiB
C++
/***************************************************************************
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copyright : (C) 2002 - 2008 by Scott Wheeler
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email : wheeler@kde.org
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***************************************************************************/
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/***************************************************************************
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* This library is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License version *
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* 2.1 as published by the Free Software Foundation. *
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* *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
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* 02110-1301 USA *
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* *
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* Alternatively, this file is available under the Mozilla Public *
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* License Version 1.1. You may obtain a copy of the License at *
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* http://www.mozilla.org/MPL/ *
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***************************************************************************/
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// This class assumes that std::basic_string<T> has a contiguous and null-terminated buffer.
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "tstring.h"
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#include "tdebug.h"
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#include "tstringlist.h"
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#include "trefcounter.h"
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#include "tutils.h"
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#include <iostream>
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#include <cstdio>
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#include <cstring>
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#ifdef HAVE_STD_CODECVT
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# include <codecvt>
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#else
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# include "unicode.h"
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#endif
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namespace
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{
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inline unsigned short combine(unsigned char c1, unsigned char c2)
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{
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return (c1 << 8) | c2;
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}
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void UTF16toUTF8(const wchar_t *src, size_t srcLength, char *dst, size_t dstLength)
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{
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#ifdef HAVE_STD_CODECVT
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typedef std::codecvt_utf8_utf16<wchar_t> utf8_utf16_t;
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using namespace TagLib;
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const wchar_t *srcBegin = src;
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const wchar_t *srcEnd = srcBegin + srcLength;
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char *dstBegin = dst;
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char *dstEnd = dstBegin + dstLength;
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std::mbstate_t st;
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const wchar_t *source;
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char *target;
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memset(&st, 0, sizeof(st));
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std::codecvt_base::result result = utf8_utf16_t().out(
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st, srcBegin, srcEnd, source, dstBegin, dstEnd, target);
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if(result != utf8_utf16_t::ok) {
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debug("String::copyFromUTF8() - Unicode conversion error.");
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}
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#else
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using namespace Unicode;
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using namespace TagLib;
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const Unicode::UTF16 *srcBegin = src;
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const Unicode::UTF16 *srcEnd = srcBegin + srcLength;
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Unicode::UTF8 *dstBegin = reinterpret_cast<Unicode::UTF8*>(dst);
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Unicode::UTF8 *dstEnd = dstBegin + dstLength;
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Unicode::ConversionResult result = Unicode::ConvertUTF16toUTF8(
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&srcBegin, srcEnd, &dstBegin, dstEnd, Unicode::lenientConversion);
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if(result != Unicode::conversionOK) {
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debug("String::to8Bit() - Unicode conversion error.");
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}
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#endif
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}
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void UTF8toUTF16(const char *src, size_t srcLength, wchar_t *dst, size_t dstLength)
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{
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#ifdef HAVE_STD_CODECVT
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typedef std::codecvt_utf8_utf16<wchar_t> utf8_utf16_t;
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using namespace TagLib;
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const char *srcBegin = src;
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const char *srcEnd = srcBegin + srcLength;
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wchar_t *dstBegin = dst;
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wchar_t *dstEnd = dstBegin + dstLength;
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std::mbstate_t st;
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const char *source;
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wchar_t *target;
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memset(&st, 0, sizeof(st));
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std::codecvt_base::result result = utf8_utf16_t().in(
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st, srcBegin, srcEnd, source, dstBegin, dstEnd, target);
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if(result != utf8_utf16_t::ok) {
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debug("String::copyFromUTF8() - Unicode conversion error.");
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}
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#else
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using namespace Unicode;
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using namespace TagLib;
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const Unicode::UTF8 *srcBegin = reinterpret_cast<const Unicode::UTF8*>(src);
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const Unicode::UTF8 *srcEnd = srcBegin + srcLength;
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Unicode::UTF16 *dstBegin = dst;
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Unicode::UTF16 *dstEnd = dstBegin + dstLength;
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Unicode::ConversionResult result = Unicode::ConvertUTF8toUTF16(
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&srcBegin, srcEnd, &dstBegin, dstEnd, Unicode::lenientConversion);
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if(result != Unicode::conversionOK) {
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debug("String::copyFromUTF8() - Unicode conversion error.");
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}
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#endif
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}
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}
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namespace TagLib {
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class String::StringPrivate : public RefCounter
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{
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public:
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StringPrivate()
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: RefCounter()
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{
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}
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StringPrivate(const wstring &s)
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: RefCounter()
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, data(s)
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{
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}
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StringPrivate(uint n, wchar_t c)
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: RefCounter()
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, data(static_cast<size_t>(n), c)
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{
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}
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/*!
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* Stores string in UTF-16. The byte order depends on the CPU endian.
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*/
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TagLib::wstring data;
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/*!
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* This is only used to hold the the most recent value of toCString().
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*/
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std::string cstring;
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};
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String String::null;
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////////////////////////////////////////////////////////////////////////////////
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String::String()
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: d(new StringPrivate())
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{
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}
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String::String(const String &s)
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: d(s.d)
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{
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d->ref();
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}
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String::String(const std::string &s, Type t)
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: d(new StringPrivate())
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{
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if(t == Latin1)
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copyFromLatin1(&s[0], s.length());
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else if(t == String::UTF8)
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copyFromUTF8(&s[0], s.length());
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else {
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debug("String::String() -- A std::string should not contain UTF16.");
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}
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}
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String::String(const wstring &s, Type t)
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: d(new StringPrivate())
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{
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if(t == UTF16 || t == UTF16BE || t == UTF16LE)
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copyFromUTF16(s.c_str(), s.length(), t);
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else {
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debug("String::String() -- A TagLib::wstring should not contain Latin1 or UTF-8.");
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}
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}
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String::String(const wchar_t *s, Type t)
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: d(new StringPrivate())
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{
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if(t == UTF16 || t == UTF16BE || t == UTF16LE)
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copyFromUTF16(s, ::wcslen(s), t);
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else {
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debug("String::String() -- A const wchar_t * should not contain Latin1 or UTF-8.");
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}
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}
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String::String(const char *s, Type t)
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: d(new StringPrivate())
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{
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if(t == Latin1)
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copyFromLatin1(s, ::strlen(s));
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else if(t == String::UTF8)
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copyFromUTF8(s, ::strlen(s));
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else {
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debug("String::String() -- A const char * should not contain UTF16.");
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}
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}
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String::String(wchar_t c, Type t)
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: d(new StringPrivate())
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{
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if(t == UTF16 || t == UTF16BE || t == UTF16LE)
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copyFromUTF16(&c, 1, t);
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else {
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debug("String::String() -- A const wchar_t should not contain Latin1 or UTF-8.");
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}
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}
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String::String(char c, Type t)
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: d(new StringPrivate(1, static_cast<uchar>(c)))
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{
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if(t != Latin1 && t != UTF8) {
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debug("String::String() -- A char should not contain UTF16.");
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}
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}
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String::String(const ByteVector &v, Type t)
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: d(new StringPrivate())
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{
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if(v.isEmpty())
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return;
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if(t == Latin1)
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copyFromLatin1(v.data(), v.size());
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else if(t == UTF8)
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copyFromUTF8(v.data(), v.size());
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else
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copyFromUTF16(v.data(), v.size(), t);
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// If we hit a null in the ByteVector, shrink the string again.
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d->data.resize(::wcslen(d->data.c_str()));
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}
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////////////////////////////////////////////////////////////////////////////////
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String::~String()
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{
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if(d->deref())
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delete d;
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}
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std::string String::to8Bit(bool unicode) const
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{
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std::string s;
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if(!unicode) {
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s.resize(d->data.size());
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std::string::iterator targetIt = s.begin();
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++) {
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*targetIt = static_cast<char>(*it);
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++targetIt;
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}
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}
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else {
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s.resize(d->data.size() * 4 + 1);
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UTF16toUTF8(&d->data[0], d->data.size(), &s[0], s.size());
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s.resize(::strlen(s.c_str()));
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}
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return s;
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}
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TagLib::wstring String::toWString() const
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{
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return d->data;
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}
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const char *String::toCString(bool unicode) const
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{
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d->cstring = to8Bit(unicode);
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return d->cstring.c_str();
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}
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const wchar_t *String::toCWString() const
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{
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return d->data.c_str();
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}
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String::Iterator String::begin()
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{
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return d->data.begin();
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}
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String::ConstIterator String::begin() const
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{
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return d->data.begin();
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}
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String::Iterator String::end()
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{
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return d->data.end();
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}
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String::ConstIterator String::end() const
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{
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return d->data.end();
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}
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int String::find(const String &s, int offset) const
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{
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return d->data.find(s.d->data, offset);
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}
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int String::rfind(const String &s, int offset) const
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{
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return d->data.rfind(s.d->data, offset);
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}
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StringList String::split(const String &separator) const
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{
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StringList list;
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for(int index = 0;;)
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{
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int sep = find(separator, index);
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if(sep < 0)
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{
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list.append(substr(index, size() - index));
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break;
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}
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else
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{
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list.append(substr(index, sep - index));
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index = sep + separator.size();
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}
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}
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return list;
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}
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bool String::startsWith(const String &s) const
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{
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if(s.length() > length())
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return false;
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return substr(0, s.length()) == s;
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}
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String String::substr(uint position, uint n) const
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{
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return String(d->data.substr(position, n));
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}
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String &String::append(const String &s)
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{
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detach();
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d->data += s.d->data;
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return *this;
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}
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String String::upper() const
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{
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String s;
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static int shift = 'A' - 'a';
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); ++it) {
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if(*it >= 'a' && *it <= 'z')
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s.d->data.push_back(*it + shift);
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else
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s.d->data.push_back(*it);
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}
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return s;
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}
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TagLib::uint String::size() const
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{
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return d->data.size();
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}
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TagLib::uint String::length() const
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{
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return size();
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}
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bool String::isEmpty() const
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{
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return d->data.size() == 0;
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}
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bool String::isNull() const
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{
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return d == null.d;
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}
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ByteVector String::data(Type t) const
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{
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switch(t)
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{
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case Latin1:
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{
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ByteVector v(size(), 0);
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char *p = v.data();
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++)
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*p++ = static_cast<char>(*it);
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return v;
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}
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case UTF8:
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{
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ByteVector v(size() * 4 + 1, 0);
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UTF16toUTF8(&d->data[0], d->data.size(), v.data(), v.size());
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v.resize(::strlen(v.data()));
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return v;
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}
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case UTF16:
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{
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ByteVector v(2 + size() * 2, 0);
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char *p = v.data();
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// Assume that if we're doing UTF16 and not UTF16BE that we want little
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// endian encoding. (Byte Order Mark)
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*p++ = '\xff';
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*p++ = '\xfe';
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++) {
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*p++ = static_cast<char>(*it & 0xff);
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*p++ = static_cast<char>(*it >> 8);
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}
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return v;
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}
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case UTF16BE:
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{
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ByteVector v(size() * 2, 0);
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char *p = v.data();
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++) {
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*p++ = static_cast<char>(*it >> 8);
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*p++ = static_cast<char>(*it & 0xff);
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}
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return v;
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}
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case UTF16LE:
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{
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ByteVector v(size() * 2, 0);
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char *p = v.data();
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++) {
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*p++ = static_cast<char>(*it & 0xff);
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*p++ = static_cast<char>(*it >> 8);
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}
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return v;
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}
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default:
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{
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debug("String::data() - Invalid Type value.");
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return ByteVector();
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}
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}
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}
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int String::toInt() const
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{
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return toInt(0);
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}
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int String::toInt(bool *ok) const
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{
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int value = 0;
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uint size = d->data.size();
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bool negative = size > 0 && d->data[0] == '-';
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uint start = negative ? 1 : 0;
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uint i = start;
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for(; i < size && d->data[i] >= '0' && d->data[i] <= '9'; i++)
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value = value * 10 + (d->data[i] - '0');
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if(negative)
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value = value * -1;
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if(ok)
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*ok = (size > start && i == size);
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return value;
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}
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String String::stripWhiteSpace() const
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{
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wstring::const_iterator begin = d->data.begin();
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wstring::const_iterator end = d->data.end();
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while(begin != end &&
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(*begin == '\t' || *begin == '\n' || *begin == '\f' ||
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*begin == '\r' || *begin == ' '))
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{
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++begin;
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}
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if(begin == end)
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return null;
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// There must be at least one non-whitespace character here for us to have
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// gotten this far, so we should be safe not doing bounds checking.
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do {
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--end;
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} while(*end == '\t' || *end == '\n' ||
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*end == '\f' || *end == '\r' || *end == ' ');
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return String(wstring(begin, end + 1));
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}
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bool String::isLatin1() const
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{
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++) {
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if(*it >= 256)
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return false;
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}
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return true;
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}
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bool String::isAscii() const
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{
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for(wstring::const_iterator it = d->data.begin(); it != d->data.end(); it++) {
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if(*it >= 128)
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return false;
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}
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return true;
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}
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String String::number(int n) // static
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{
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static const size_t BufferSize = 11; // Sufficient to store "-214748364".
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static const char *Format = "%d";
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char buffer[BufferSize];
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int length;
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#if defined(HAVE_SNPRINTF)
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length = snprintf(buffer, BufferSize, Format, n);
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#elif defined(HAVE_SPRINTF_S)
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length = sprintf_s(buffer, Format, n);
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#else
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length = sprintf(buffer, Format, n);
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#endif
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if(length > 0)
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return String(buffer);
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else
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return String::null;
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}
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|
|
|
TagLib::wchar &String::operator[](int i)
|
|
{
|
|
detach();
|
|
return d->data[i];
|
|
}
|
|
|
|
const TagLib::wchar &String::operator[](int i) const
|
|
{
|
|
return d->data[i];
|
|
}
|
|
|
|
bool String::operator==(const String &s) const
|
|
{
|
|
return d == s.d || d->data == s.d->data;
|
|
}
|
|
|
|
bool String::operator!=(const String &s) const
|
|
{
|
|
return !operator==(s);
|
|
}
|
|
|
|
String &String::operator+=(const String &s)
|
|
{
|
|
detach();
|
|
|
|
d->data += s.d->data;
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator+=(const wchar_t *s)
|
|
{
|
|
detach();
|
|
|
|
d->data += s;
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator+=(const char *s)
|
|
{
|
|
detach();
|
|
|
|
for(int i = 0; s[i] != 0; i++)
|
|
d->data += uchar(s[i]);
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator+=(wchar_t c)
|
|
{
|
|
detach();
|
|
|
|
d->data += c;
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator+=(char c)
|
|
{
|
|
detach();
|
|
|
|
d->data += uchar(c);
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(const String &s)
|
|
{
|
|
if(&s == this)
|
|
return *this;
|
|
|
|
if(d->deref())
|
|
delete d;
|
|
d = s.d;
|
|
d->ref();
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(const std::string &s)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
|
|
d = new StringPrivate;
|
|
copyFromLatin1(s.c_str(), s.length());
|
|
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(const wstring &s)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
d = new StringPrivate(s);
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(const wchar_t *s)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
|
|
d = new StringPrivate(s);
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(char c)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
|
|
d = new StringPrivate(1, static_cast<uchar>(c));
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(wchar_t c)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
|
|
d = new StringPrivate(1, c);
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(const char *s)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
|
|
d = new StringPrivate;
|
|
copyFromLatin1(s, ::strlen(s));
|
|
|
|
return *this;
|
|
}
|
|
|
|
String &String::operator=(const ByteVector &v)
|
|
{
|
|
if(d->deref())
|
|
delete d;
|
|
|
|
d = new StringPrivate;
|
|
copyFromLatin1(v.data(), v.size());
|
|
|
|
// If we hit a null in the ByteVector, shrink the string again.
|
|
d->data.resize(::wcslen(d->data.c_str()));
|
|
|
|
return *this;
|
|
}
|
|
|
|
bool String::operator<(const String &s) const
|
|
{
|
|
return d->data < s.d->data;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// protected members
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void String::detach()
|
|
{
|
|
if(d->count() > 1) {
|
|
d->deref();
|
|
d = new StringPrivate(d->data);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// private members
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void String::copyFromLatin1(const char *s, size_t length)
|
|
{
|
|
d->data.resize(length);
|
|
|
|
for(size_t i = 0; i < length; ++i)
|
|
d->data[i] = static_cast<uchar>(s[i]);
|
|
}
|
|
|
|
void String::copyFromUTF8(const char *s, size_t length)
|
|
{
|
|
d->data.resize(length);
|
|
|
|
UTF8toUTF16(s, length, &d->data[0], d->data.size());
|
|
d->data.resize(::wcslen(d->data.c_str()));
|
|
}
|
|
|
|
void String::copyFromUTF16(const wchar_t *s, size_t length, Type t)
|
|
{
|
|
bool swap;
|
|
if(t == UTF16) {
|
|
if(length >= 1 && s[0] == 0xfeff)
|
|
swap = false; // Same as CPU endian. No need to swap bytes.
|
|
else if(length >= 1 && s[0] == 0xfffe)
|
|
swap = true; // Not same as CPU endian. Need to swap bytes.
|
|
else {
|
|
debug("String::copyFromUTF16() - Invalid UTF16 string.");
|
|
return;
|
|
}
|
|
|
|
s++;
|
|
length--;
|
|
}
|
|
else
|
|
swap = (t != WCharByteOrder);
|
|
|
|
d->data.resize(length);
|
|
memcpy(&d->data[0], s, length * sizeof(wchar_t));
|
|
|
|
if(swap) {
|
|
for(size_t i = 0; i < length; ++i)
|
|
d->data[i] = Utils::byteSwap(static_cast<ushort>(s[i]));
|
|
}
|
|
}
|
|
|
|
void String::copyFromUTF16(const char *s, size_t length, Type t)
|
|
{
|
|
bool swap;
|
|
if(t == UTF16) {
|
|
if(length < 2) {
|
|
debug("String::copyFromUTF16() - Invalid UTF16 string.");
|
|
return;
|
|
}
|
|
|
|
// Uses memcpy instead of reinterpret_cast to avoid an alignment exception.
|
|
ushort bom;
|
|
::memcpy(&bom, s, 2);
|
|
|
|
if(bom == 0xfeff)
|
|
swap = false; // Same as CPU endian. No need to swap bytes.
|
|
else if(bom == 0xfffe)
|
|
swap = true; // Not same as CPU endian. Need to swap bytes.
|
|
else {
|
|
debug("String::copyFromUTF16() - Invalid UTF16 string.");
|
|
return;
|
|
}
|
|
|
|
s += 2;
|
|
length -= 2;
|
|
}
|
|
else
|
|
swap = (t != WCharByteOrder);
|
|
|
|
d->data.resize(length / 2);
|
|
for(size_t i = 0; i < length / 2; ++i) {
|
|
d->data[i] = swap ? combine(*s, *(s + 1)) : combine(*(s + 1), *s);
|
|
s += 2;
|
|
}
|
|
}
|
|
|
|
const String::Type String::WCharByteOrder
|
|
= (Utils::SystemByteOrder == Utils::BigEndian) ? String::UTF16BE : String::UTF16LE;
|
|
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// related functions
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
const TagLib::String operator+(const TagLib::String &s1, const TagLib::String &s2)
|
|
{
|
|
TagLib::String s(s1);
|
|
s.append(s2);
|
|
return s;
|
|
}
|
|
|
|
const TagLib::String operator+(const char *s1, const TagLib::String &s2)
|
|
{
|
|
TagLib::String s(s1);
|
|
s.append(s2);
|
|
return s;
|
|
}
|
|
|
|
const TagLib::String operator+(const TagLib::String &s1, const char *s2)
|
|
{
|
|
TagLib::String s(s1);
|
|
s.append(s2);
|
|
return s;
|
|
}
|
|
|
|
std::ostream &operator<<(std::ostream &s, const TagLib::String &str)
|
|
{
|
|
s << str.to8Bit();
|
|
return s;
|
|
}
|
|
|