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author | Upstream <upstream-import@none> | 1970-01-12 13:46:40 +0000 |
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committer | Upstream <upstream-import@none> | 1970-01-12 13:46:40 +0000 |
commit | d8543bb6618c17b12da906afa77d216f58cf4058 (patch) | |
tree | c58dc05ed86825bd0ef8d305d58c8205106b540f /WebCore/platform/text/String.cpp | |
download | external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.zip external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.tar.gz external_webkit-d8543bb6618c17b12da906afa77d216f58cf4058.tar.bz2 |
external/webkit r30707
Diffstat (limited to 'WebCore/platform/text/String.cpp')
-rw-r--r-- | WebCore/platform/text/String.cpp | 799 |
1 files changed, 799 insertions, 0 deletions
diff --git a/WebCore/platform/text/String.cpp b/WebCore/platform/text/String.cpp new file mode 100644 index 0000000..ee4cef4 --- /dev/null +++ b/WebCore/platform/text/String.cpp @@ -0,0 +1,799 @@ +/* + * (C) 1999 Lars Knoll (knoll@kde.org) + * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include "config.h" +#include "PlatformString.h" + +#include "CString.h" +#include "FloatConversion.h" +#include "StringBuffer.h" +#include "TextEncoding.h" +#include <kjs/dtoa.h> +#include <kjs/identifier.h> +#include <limits> +#include <stdarg.h> +#include <wtf/ASCIICType.h> +#include <wtf/StringExtras.h> +#include <wtf/Vector.h> +#include <wtf/unicode/Unicode.h> + +using KJS::Identifier; +using KJS::UString; + +using namespace WTF; + +namespace WebCore { + +String::String(const UChar* str, unsigned len) +{ + if (!str) + return; + m_impl = StringImpl::create(str, len); +} + +String::String(const UChar* str) +{ + if (!str) + return; + + int len = 0; + while (str[len] != UChar(0)) + len++; + + m_impl = StringImpl::create(str, len); +} + +String::String(const char* str) +{ + if (!str) + return; + m_impl = StringImpl::create(str); +} + +String::String(const char* str, unsigned length) +{ + if (!str) + return; + m_impl = StringImpl::create(str, length); +} + +void String::append(const String& str) +{ + // FIXME: This is extremely inefficient. So much so that we might want to take this + // out of String's API. We can make it better by optimizing the case where exactly + // one String is pointing at this StringImpl, but even then it's going to require a + // call to fastMalloc every single time. + if (str.m_impl) { + if (m_impl) { + StringBuffer buffer(m_impl->length() + str.length()); + memcpy(buffer.characters(), m_impl->characters(), m_impl->length() * sizeof(UChar)); + memcpy(buffer.characters() + m_impl->length(), str.characters(), str.length() * sizeof(UChar)); + m_impl = StringImpl::adopt(buffer); + } else + m_impl = str.m_impl; + } +} + +void String::append(char c) +{ + // FIXME: This is extremely inefficient. So much so that we might want to take this + // out of String's API. We can make it better by optimizing the case where exactly + // one String is pointing at this StringImpl, but even then it's going to require a + // call to fastMalloc every single time. + if (m_impl) { + StringBuffer buffer(m_impl->length() + 1); + memcpy(buffer.characters(), m_impl->characters(), m_impl->length() * sizeof(UChar)); + buffer[m_impl->length()] = c; + m_impl = StringImpl::adopt(buffer); + } else + m_impl = StringImpl::create(&c, 1); +} + +void String::append(UChar c) +{ + // FIXME: This is extremely inefficient. So much so that we might want to take this + // out of String's API. We can make it better by optimizing the case where exactly + // one String is pointing at this StringImpl, but even then it's going to require a + // call to fastMalloc every single time. + if (m_impl) { + StringBuffer buffer(m_impl->length() + 1); + memcpy(buffer.characters(), m_impl->characters(), m_impl->length() * sizeof(UChar)); + buffer[m_impl->length()] = c; + m_impl = StringImpl::adopt(buffer); + } else + m_impl = StringImpl::create(&c, 1); +} + +String operator+(const String& a, const String& b) +{ + if (a.isEmpty()) + return b; + if (b.isEmpty()) + return a; + String c = a; + c += b; + return c; +} + +String operator+(const String& s, const char* cs) +{ + return s + String(cs); +} + +String operator+(const char* cs, const String& s) +{ + return String(cs) + s; +} + +void String::insert(const String& str, unsigned pos) +{ + if (str.isEmpty()) { + if (str.isNull()) + return; + if (isNull()) + m_impl = str.impl(); + return; + } + insert(str.characters(), str.length(), pos); +} + +void String::append(const UChar* charactersToAppend, unsigned lengthToAppend) +{ + if (!m_impl) { + if (!charactersToAppend) + return; + m_impl = StringImpl::create(charactersToAppend, lengthToAppend); + return; + } + + if (!lengthToAppend) + return; + + ASSERT(charactersToAppend); + StringBuffer buffer(length() + lengthToAppend); + memcpy(buffer.characters(), characters(), length() * sizeof(UChar)); + memcpy(buffer.characters() + length(), charactersToAppend, lengthToAppend * sizeof(UChar)); + m_impl = StringImpl::adopt(buffer); +} + +void String::insert(const UChar* charactersToInsert, unsigned lengthToInsert, unsigned position) +{ + if (position >= length()) { + append(charactersToInsert, lengthToInsert); + return; + } + + ASSERT(m_impl); + + if (!lengthToInsert) + return; + + ASSERT(charactersToInsert); + StringBuffer buffer(length() + lengthToInsert); + memcpy(buffer.characters(), characters(), position * sizeof(UChar)); + memcpy(buffer.characters() + position, charactersToInsert, lengthToInsert * sizeof(UChar)); + memcpy(buffer.characters() + position + lengthToInsert, characters() + position, (length() - position) * sizeof(UChar)); + m_impl = StringImpl::adopt(buffer); +} + +UChar String::operator[](unsigned i) const +{ + if (!m_impl || i >= m_impl->length()) + return 0; + return m_impl->characters()[i]; +} + +UChar32 String::characterStartingAt(unsigned i) const +{ + if (!m_impl || i >= m_impl->length()) + return 0; + return m_impl->characterStartingAt(i); +} + +unsigned String::length() const +{ + if (!m_impl) + return 0; + return m_impl->length(); +} + +void String::truncate(unsigned position) +{ + if (position >= length()) + return; + StringBuffer buffer(position); + memcpy(buffer.characters(), characters(), position * sizeof(UChar)); + m_impl = StringImpl::adopt(buffer); +} + +void String::remove(unsigned position, int lengthToRemove) +{ + if (lengthToRemove <= 0) + return; + if (position >= length()) + return; + if (static_cast<unsigned>(lengthToRemove) > length() - position) + lengthToRemove = length() - position; + StringBuffer buffer(length() - lengthToRemove); + memcpy(buffer.characters(), characters(), position * sizeof(UChar)); + memcpy(buffer.characters() + position, characters() + position + lengthToRemove, + (length() - lengthToRemove - position) * sizeof(UChar)); + m_impl = StringImpl::adopt(buffer); +} + +String String::substring(unsigned pos, unsigned len) const +{ + if (!m_impl) + return String(); + return m_impl->substring(pos, len); +} + +String String::lower() const +{ + if (!m_impl) + return String(); + return m_impl->lower(); +} + +String String::upper() const +{ + if (!m_impl) + return String(); + return m_impl->upper(); +} + +String String::stripWhiteSpace() const +{ + if (!m_impl) + return String(); + return m_impl->stripWhiteSpace(); +} + +String String::simplifyWhiteSpace() const +{ + if (!m_impl) + return String(); + return m_impl->simplifyWhiteSpace(); +} + +String String::foldCase() const +{ + if (!m_impl) + return String(); + return m_impl->foldCase(); +} + +bool String::percentage(int& result) const +{ + if (!m_impl || !m_impl->length()) + return false; + + if ((*m_impl)[m_impl->length() - 1] != '%') + return false; + + result = charactersToIntStrict(m_impl->characters(), m_impl->length() - 1); + return true; +} + +const UChar* String::characters() const +{ + if (!m_impl) + return 0; + return m_impl->characters(); +} + +const UChar* String::charactersWithNullTermination() +{ + if (!m_impl) + return 0; + if (m_impl->hasTerminatingNullCharacter()) + return m_impl->characters(); + m_impl = StringImpl::createWithTerminatingNullCharacter(*m_impl); + return m_impl->characters(); +} + +String String::format(const char *format, ...) +{ + va_list args; + va_start(args, format); + + Vector<char, 256> buffer; + + // Do the format once to get the length. +#if COMPILER(MSVC) + int result = _vscprintf(format, args); +#else + char ch; + int result = vsnprintf(&ch, 1, format, args); + // We need to call va_end() and then va_start() again here, as the + // contents of args is undefined after the call to vsnprintf + // according to http://man.cx/snprintf(3) + // + // Not calling va_end/va_start here happens to work on lots of + // systems, but fails e.g. on 64bit Linux. + va_end(args); + va_start(args, format); +#endif + + if (result == 0) + return String(""); + if (result < 0) + return String(); + unsigned len = result; + buffer.grow(len + 1); + + // Now do the formatting again, guaranteed to fit. + vsnprintf(buffer.data(), buffer.size(), format, args); + + va_end(args); + + return StringImpl::create(buffer.data(), len); +} + +String String::number(int n) +{ + return String::format("%d", n); +} + +String String::number(unsigned n) +{ + return String::format("%u", n); +} + +String String::number(long n) +{ + return String::format("%ld", n); +} + +String String::number(unsigned long n) +{ + return String::format("%lu", n); +} + +String String::number(long long n) +{ +#if PLATFORM(WIN_OS) + return String::format("%I64i", n); +#else + return String::format("%lli", n); +#endif +} + +String String::number(unsigned long long n) +{ +#if PLATFORM(WIN_OS) + return String::format("%I64u", n); +#else + return String::format("%llu", n); +#endif +} + +String String::number(double n) +{ + return String::format("%.6lg", n); +} + +int String::toIntStrict(bool* ok, int base) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toIntStrict(ok, base); +} + +unsigned String::toUIntStrict(bool* ok, int base) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toUIntStrict(ok, base); +} + +int64_t String::toInt64Strict(bool* ok, int base) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toInt64Strict(ok, base); +} + +uint64_t String::toUInt64Strict(bool* ok, int base) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toUInt64Strict(ok, base); +} + +int String::toInt(bool* ok) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toInt(ok); +} + +unsigned String::toUInt(bool* ok) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toUInt(ok); +} + +int64_t String::toInt64(bool* ok) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toInt64(ok); +} + +uint64_t String::toUInt64(bool* ok) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0; + } + return m_impl->toUInt64(ok); +} + +double String::toDouble(bool* ok) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0.0; + } + return m_impl->toDouble(ok); +} + +float String::toFloat(bool* ok) const +{ + if (!m_impl) { + if (ok) + *ok = false; + return 0.0f; + } + return m_impl->toFloat(ok); +} + +String String::copy() const +{ + if (!m_impl) + return String(); + return m_impl->copy(); +} + +bool String::isEmpty() const +{ + return !m_impl || !m_impl->length(); +} + +Length* String::toCoordsArray(int& len) const +{ + return m_impl ? m_impl->toCoordsArray(len) : 0; +} + +Length* String::toLengthArray(int& len) const +{ + return m_impl ? m_impl->toLengthArray(len) : 0; +} + +void String::split(const String& separator, bool allowEmptyEntries, Vector<String>& result) const +{ + result.clear(); + + int startPos = 0; + int endPos; + while ((endPos = find(separator, startPos)) != -1) { + if (allowEmptyEntries || startPos != endPos) + result.append(substring(startPos, endPos - startPos)); + startPos = endPos + separator.length(); + } + if (allowEmptyEntries || startPos != static_cast<int>(length())) + result.append(substring(startPos)); +} + +void String::split(const String& separator, Vector<String>& result) const +{ + return split(separator, false, result); +} + +void String::split(UChar separator, bool allowEmptyEntries, Vector<String>& result) const +{ + result.clear(); + + int startPos = 0; + int endPos; + while ((endPos = find(separator, startPos)) != -1) { + if (allowEmptyEntries || startPos != endPos) + result.append(substring(startPos, endPos - startPos)); + startPos = endPos + 1; + } + if (allowEmptyEntries || startPos != static_cast<int>(length())) + result.append(substring(startPos)); +} + +void String::split(UChar separator, Vector<String>& result) const +{ + return split(String(&separator, 1), false, result); +} + +#ifndef NDEBUG +Vector<char> String::ascii() const +{ + if (m_impl) + return m_impl->ascii(); + + const char* nullMsg = "(null impl)"; + Vector<char, 2048> buffer; + for (int i = 0; nullMsg[i]; ++i) + buffer.append(nullMsg[i]); + + buffer.append('\0'); + return buffer; +} +#endif + +CString String::latin1() const +{ + return Latin1Encoding().encode(characters(), length()); +} + +CString String::utf8() const +{ + return UTF8Encoding().encode(characters(), length()); +} + +String String::fromUTF8(const char* string, size_t size) +{ + return UTF8Encoding().decode(string, size); +} + +String String::fromUTF8(const char* string) +{ + return UTF8Encoding().decode(string, strlen(string)); +} + +String::String(const Identifier& str) +{ + if (str.isNull()) + return; + m_impl = StringImpl::create(reinterpret_cast<const UChar*>(str.data()), str.size()); +} + +String::String(const UString& str) +{ + if (str.isNull()) + return; + m_impl = StringImpl::create(reinterpret_cast<const UChar*>(str.data()), str.size()); +} + +String::operator Identifier() const +{ + if (!m_impl) + return Identifier(); + return Identifier(reinterpret_cast<const KJS::UChar*>(m_impl->characters()), m_impl->length()); +} + +String::operator UString() const +{ + if (!m_impl) + return UString(); + return UString(reinterpret_cast<const KJS::UChar*>(m_impl->characters()), m_impl->length()); +} + +// String Operations + +static bool isCharacterAllowedInBase(UChar c, int base) +{ + if (c > 0x7F) + return false; + if (isASCIIDigit(c)) + return c - '0' < base; + if (isASCIIAlpha(c)) { + if (base > 36) + base = 36; + return (c >= 'a' && c < 'a' + base - 10) + || (c >= 'A' && c < 'A' + base - 10); + } + return false; +} + +template <typename IntegralType> +static inline IntegralType toIntegralType(const UChar* data, size_t length, bool* ok, int base) +{ + static const IntegralType integralMax = std::numeric_limits<IntegralType>::max(); + static const bool isSigned = std::numeric_limits<IntegralType>::is_signed; + const IntegralType maxMultiplier = integralMax / base; + + IntegralType value = 0; + bool isOk = false; + bool isNegative = false; + + if (!data) + goto bye; + + // skip leading whitespace + while (length && isSpaceOrNewline(*data)) { + length--; + data++; + } + + if (isSigned && length && *data == '-') { + length--; + data++; + isNegative = true; + } else if (length && *data == '+') { + length--; + data++; + } + + if (!length || !isCharacterAllowedInBase(*data, base)) + goto bye; + + while (length && isCharacterAllowedInBase(*data, base)) { + length--; + IntegralType digitValue; + UChar c = *data; + if (isASCIIDigit(c)) + digitValue = c - '0'; + else if (c >= 'a') + digitValue = c - 'a' + 10; + else + digitValue = c - 'A' + 10; + + if (value > maxMultiplier || (value == maxMultiplier && digitValue > (integralMax % base) + isNegative)) + goto bye; + + value = base * value + digitValue; + data++; + } + + if (isNegative) + value = -value; + + // skip trailing space + while (length && isSpaceOrNewline(*data)) { + length--; + data++; + } + + if (!length) + isOk = true; +bye: + if (ok) + *ok = isOk; + return isOk ? value : 0; +} + +static unsigned lengthOfCharactersAsInteger(const UChar* data, size_t length) +{ + size_t i = 0; + + // Allow leading spaces. + for (; i != length; ++i) { + if (!isSpaceOrNewline(data[i])) + break; + } + + // Allow sign. + if (i != length && (data[i] == '+' || data[i] == '-')) + ++i; + + // Allow digits. + for (; i != length; ++i) { + if (!Unicode::isDigit(data[i])) + break; + } + + return i; +} + +int charactersToIntStrict(const UChar* data, size_t length, bool* ok, int base) +{ + return toIntegralType<int>(data, length, ok, base); +} + +unsigned charactersToUIntStrict(const UChar* data, size_t length, bool* ok, int base) +{ + return toIntegralType<unsigned>(data, length, ok, base); +} + +int64_t charactersToInt64Strict(const UChar* data, size_t length, bool* ok, int base) +{ + return toIntegralType<int64_t>(data, length, ok, base); +} + +uint64_t charactersToUInt64Strict(const UChar* data, size_t length, bool* ok, int base) +{ + return toIntegralType<uint64_t>(data, length, ok, base); +} + +int charactersToInt(const UChar* data, size_t length, bool* ok) +{ + return toIntegralType<int>(data, lengthOfCharactersAsInteger(data, length), ok, 10); +} + +unsigned charactersToUInt(const UChar* data, size_t length, bool* ok) +{ + return toIntegralType<unsigned>(data, lengthOfCharactersAsInteger(data, length), ok, 10); +} + +int64_t charactersToInt64(const UChar* data, size_t length, bool* ok) +{ + return toIntegralType<int64_t>(data, lengthOfCharactersAsInteger(data, length), ok, 10); +} + +uint64_t charactersToUInt64(const UChar* data, size_t length, bool* ok) +{ + return toIntegralType<uint64_t>(data, lengthOfCharactersAsInteger(data, length), ok, 10); +} + +double charactersToDouble(const UChar* data, size_t length, bool* ok) +{ + if (!length) { + if (ok) + *ok = false; + return 0.0; + } + + Vector<char, 256> bytes(length + 1); + for (unsigned i = 0; i < length; ++i) + bytes[i] = data[i] < 0x7F ? data[i] : '?'; + bytes[length] = '\0'; + char* end; + double val = kjs_strtod(bytes.data(), &end); + if (ok) + *ok = (end == 0 || *end == '\0'); + return val; +} + +float charactersToFloat(const UChar* data, size_t length, bool* ok) +{ + // FIXME: This will return ok even when the string fits into a double but not a float. + return narrowPrecisionToFloat(charactersToDouble(data, length, ok)); +} + +} // namespace WebCore + +#ifndef NDEBUG +// For debugging only -- leaks memory +WebCore::String* string(const char* s) +{ + return new WebCore::String(s); +} +#endif |