Re-arrange fxcrt string files to match naming.

The top-level fx_string.h is kept to include all strings.
Put all fx_atof code in fx_basic_util.cpp rather than header.

Change-Id: I61fe768f2e1ddf8438d27e410929f4cff918a9a3
Reviewed-on: https://pdfium-review.googlesource.com/3530
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 0 insertions, 1042 deletions

diff --git a/core/fxcrt/fx_basic_wstring.cpp b/core/fxcrt/fx_basic_wstring.cpp
deleted file mode 100644
index 99002e581f..0000000000
--- a/core/fxcrt/fx_basic_wstring.cpp
+++ /dev/null
@@ -1,1042 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include <stddef.h>
-
-#include <algorithm>
-#include <cctype>
-
-#include "core/fxcrt/cfx_string_pool_template.h"
-#include "core/fxcrt/fx_basic.h"
-#include "core/fxcrt/fx_ext.h"
-#include "third_party/base/numerics/safe_math.h"
-#include "third_party/base/stl_util.h"
-
-template class CFX_StringDataTemplate<wchar_t>;
-template class CFX_StringCTemplate<wchar_t>;
-template class CFX_StringPoolTemplate<CFX_WideString>;
-template struct std::hash<CFX_WideString>;
-
-#define FORCE_ANSI 0x10000
-#define FORCE_UNICODE 0x20000
-#define FORCE_INT64 0x40000
-
-namespace {
-
-#ifndef NDEBUG
-bool IsValidCodePage(uint16_t codepage) {
-  switch (codepage) {
-    case 0:
-    case 932:
-    case 936:
-    case 949:
-    case 950:
-      return true;
-
-    default:
-      return false;
-  }
-}
-#endif
-
-const wchar_t* FX_wcsstr(const wchar_t* haystack,
-                         int haystack_len,
-                         const wchar_t* needle,
-                         int needle_len) {
-  if (needle_len > haystack_len || needle_len == 0) {
-    return nullptr;
-  }
-  const wchar_t* end_ptr = haystack + haystack_len - needle_len;
-  while (haystack <= end_ptr) {
-    int i = 0;
-    while (1) {
-      if (haystack[i] != needle[i]) {
-        break;
-      }
-      i++;
-      if (i == needle_len) {
-        return haystack;
-      }
-    }
-    haystack++;
-  }
-  return nullptr;
-}
-
-FX_STRSIZE GuessSizeForVSWPrintf(const wchar_t* pFormat, va_list argList) {
-  FX_STRSIZE nMaxLen = 0;
-  for (const wchar_t* pStr = pFormat; *pStr != 0; pStr++) {
-    if (*pStr != '%' || *(pStr = pStr + 1) == '%') {
-      ++nMaxLen;
-      continue;
-    }
-    int nItemLen = 0;
-    int nWidth = 0;
-    for (; *pStr != 0; pStr++) {
-      if (*pStr == '#') {
-        nMaxLen += 2;
-      } else if (*pStr == '*') {
-        nWidth = va_arg(argList, int);
-      } else if (*pStr != '-' && *pStr != '+' && *pStr != '0' && *pStr != ' ') {
-        break;
-      }
-    }
-    if (nWidth == 0) {
-      nWidth = FXSYS_wtoi(pStr);
-      while (std::iswdigit(*pStr))
-        ++pStr;
-    }
-    if (nWidth < 0 || nWidth > 128 * 1024)
-      return -1;
-    int nPrecision = 0;
-    if (*pStr == '.') {
-      pStr++;
-      if (*pStr == '*') {
-        nPrecision = va_arg(argList, int);
-        pStr++;
-      } else {
-        nPrecision = FXSYS_wtoi(pStr);
-        while (std::iswdigit(*pStr))
-          ++pStr;
-      }
-    }
-    if (nPrecision < 0 || nPrecision > 128 * 1024)
-      return -1;
-    int nModifier = 0;
-    if (*pStr == L'I' && *(pStr + 1) == L'6' && *(pStr + 2) == L'4') {
-      pStr += 3;
-      nModifier = FORCE_INT64;
-    } else {
-      switch (*pStr) {
-        case 'h':
-          nModifier = FORCE_ANSI;
-          pStr++;
-          break;
-        case 'l':
-          nModifier = FORCE_UNICODE;
-          pStr++;
-          break;
-        case 'F':
-        case 'N':
-        case 'L':
-          pStr++;
-          break;
-      }
-    }
-    switch (*pStr | nModifier) {
-      case 'c':
-      case 'C':
-        nItemLen = 2;
-        va_arg(argList, int);
-        break;
-      case 'c' | FORCE_ANSI:
-      case 'C' | FORCE_ANSI:
-        nItemLen = 2;
-        va_arg(argList, int);
-        break;
-      case 'c' | FORCE_UNICODE:
-      case 'C' | FORCE_UNICODE:
-        nItemLen = 2;
-        va_arg(argList, int);
-        break;
-      case 's': {
-        const wchar_t* pstrNextArg = va_arg(argList, const wchar_t*);
-        if (pstrNextArg) {
-          nItemLen = FXSYS_wcslen(pstrNextArg);
-          if (nItemLen < 1) {
-            nItemLen = 1;
-          }
-        } else {
-          nItemLen = 6;
-        }
-      } break;
-      case 'S': {
-        const char* pstrNextArg = va_arg(argList, const char*);
-        if (pstrNextArg) {
-          nItemLen = FXSYS_strlen(pstrNextArg);
-          if (nItemLen < 1) {
-            nItemLen = 1;
-          }
-        } else {
-          nItemLen = 6;
-        }
-      } break;
-      case 's' | FORCE_ANSI:
-      case 'S' | FORCE_ANSI: {
-        const char* pstrNextArg = va_arg(argList, const char*);
-        if (pstrNextArg) {
-          nItemLen = FXSYS_strlen(pstrNextArg);
-          if (nItemLen < 1) {
-            nItemLen = 1;
-          }
-        } else {
-          nItemLen = 6;
-        }
-      } break;
-      case 's' | FORCE_UNICODE:
-      case 'S' | FORCE_UNICODE: {
-        const wchar_t* pstrNextArg = va_arg(argList, wchar_t*);
-        if (pstrNextArg) {
-          nItemLen = FXSYS_wcslen(pstrNextArg);
-          if (nItemLen < 1) {
-            nItemLen = 1;
-          }
-        } else {
-          nItemLen = 6;
-        }
-      } break;
-    }
-    if (nItemLen != 0) {
-      if (nPrecision != 0 && nItemLen > nPrecision) {
-        nItemLen = nPrecision;
-      }
-      if (nItemLen < nWidth) {
-        nItemLen = nWidth;
-      }
-    } else {
-      switch (*pStr) {
-        case 'd':
-        case 'i':
-        case 'u':
-        case 'x':
-        case 'X':
-        case 'o':
-          if (nModifier & FORCE_INT64) {
-            va_arg(argList, int64_t);
-          } else {
-            va_arg(argList, int);
-          }
-          nItemLen = 32;
-          if (nItemLen < nWidth + nPrecision) {
-            nItemLen = nWidth + nPrecision;
-          }
-          break;
-        case 'a':
-        case 'A':
-        case 'e':
-        case 'E':
-        case 'g':
-        case 'G':
-          va_arg(argList, double);
-          nItemLen = 128;
-          if (nItemLen < nWidth + nPrecision) {
-            nItemLen = nWidth + nPrecision;
-          }
-          break;
-        case 'f':
-          if (nWidth + nPrecision > 100) {
-            nItemLen = nPrecision + nWidth + 128;
-          } else {
-            double f;
-            char pszTemp[256];
-            f = va_arg(argList, double);
-            FXSYS_snprintf(pszTemp, sizeof(pszTemp), "%*.*f", nWidth,
-                           nPrecision + 6, f);
-            nItemLen = FXSYS_strlen(pszTemp);
-          }
-          break;
-        case 'p':
-          va_arg(argList, void*);
-          nItemLen = 32;
-          if (nItemLen < nWidth + nPrecision) {
-            nItemLen = nWidth + nPrecision;
-          }
-          break;
-        case 'n':
-          va_arg(argList, int*);
-          break;
-      }
-    }
-    nMaxLen += nItemLen;
-  }
-  nMaxLen += 32;  // Fudge factor.
-  return nMaxLen;
-}
-
-}  // namespace
-
-static_assert(sizeof(CFX_WideString) <= sizeof(wchar_t*),
-              "Strings must not require more space than pointers");
-
-CFX_WideString::CFX_WideString() {}
-
-CFX_WideString::CFX_WideString(const CFX_WideString& other)
-    : m_pData(other.m_pData) {}
-
-CFX_WideString::CFX_WideString(CFX_WideString&& other) noexcept {
-  m_pData.Swap(other.m_pData);
-}
-
-CFX_WideString::CFX_WideString(const wchar_t* pStr, FX_STRSIZE nLen) {
-  if (nLen < 0)
-    nLen = pStr ? FXSYS_wcslen(pStr) : 0;
-
-  if (nLen)
-    m_pData.Reset(StringData::Create(pStr, nLen));
-}
-
-CFX_WideString::CFX_WideString(wchar_t ch) {
-  m_pData.Reset(StringData::Create(1));
-  m_pData->m_String[0] = ch;
-}
-
-CFX_WideString::CFX_WideString(const wchar_t* ptr)
-    : CFX_WideString(ptr, ptr ? FXSYS_wcslen(ptr) : 0) {}
-
-CFX_WideString::CFX_WideString(const CFX_WideStringC& stringSrc) {
-  if (!stringSrc.IsEmpty()) {
-    m_pData.Reset(StringData::Create(stringSrc.c_str(), stringSrc.GetLength()));
-  }
-}
-
-CFX_WideString::CFX_WideString(const CFX_WideStringC& str1,
-                               const CFX_WideStringC& str2) {
-  int nNewLen = str1.GetLength() + str2.GetLength();
-  if (nNewLen == 0)
-    return;
-
-  m_pData.Reset(StringData::Create(nNewLen));
-  m_pData->CopyContents(str1.c_str(), str1.GetLength());
-  m_pData->CopyContentsAt(str1.GetLength(), str2.c_str(), str2.GetLength());
-}
-
-CFX_WideString::~CFX_WideString() {}
-
-const CFX_WideString& CFX_WideString::operator=(const wchar_t* pStr) {
-  if (!pStr || !pStr[0])
-    clear();
-  else
-    AssignCopy(pStr, FXSYS_wcslen(pStr));
-
-  return *this;
-}
-
-const CFX_WideString& CFX_WideString::operator=(
-    const CFX_WideStringC& stringSrc) {
-  if (stringSrc.IsEmpty())
-    clear();
-  else
-    AssignCopy(stringSrc.c_str(), stringSrc.GetLength());
-
-  return *this;
-}
-
-const CFX_WideString& CFX_WideString::operator=(
-    const CFX_WideString& stringSrc) {
-  if (m_pData != stringSrc.m_pData)
-    m_pData = stringSrc.m_pData;
-
-  return *this;
-}
-
-const CFX_WideString& CFX_WideString::operator+=(const wchar_t* pStr) {
-  if (pStr)
-    Concat(pStr, FXSYS_wcslen(pStr));
-
-  return *this;
-}
-
-const CFX_WideString& CFX_WideString::operator+=(wchar_t ch) {
-  Concat(&ch, 1);
-  return *this;
-}
-
-const CFX_WideString& CFX_WideString::operator+=(const CFX_WideString& str) {
-  if (str.m_pData)
-    Concat(str.m_pData->m_String, str.m_pData->m_nDataLength);
-
-  return *this;
-}
-
-const CFX_WideString& CFX_WideString::operator+=(const CFX_WideStringC& str) {
-  if (!str.IsEmpty())
-    Concat(str.c_str(), str.GetLength());
-
-  return *this;
-}
-
-bool CFX_WideString::operator==(const wchar_t* ptr) const {
-  if (!m_pData)
-    return !ptr || !ptr[0];
-
-  if (!ptr)
-    return m_pData->m_nDataLength == 0;
-
-  return wcslen(ptr) == static_cast<size_t>(m_pData->m_nDataLength) &&
-         wmemcmp(ptr, m_pData->m_String, m_pData->m_nDataLength) == 0;
-}
-
-bool CFX_WideString::operator==(const CFX_WideStringC& str) const {
-  if (!m_pData)
-    return str.IsEmpty();
-
-  return m_pData->m_nDataLength == str.GetLength() &&
-         wmemcmp(m_pData->m_String, str.c_str(), str.GetLength()) == 0;
-}
-
-bool CFX_WideString::operator==(const CFX_WideString& other) const {
-  if (m_pData == other.m_pData)
-    return true;
-
-  if (IsEmpty())
-    return other.IsEmpty();
-
-  if (other.IsEmpty())
-    return false;
-
-  return other.m_pData->m_nDataLength == m_pData->m_nDataLength &&
-         wmemcmp(other.m_pData->m_String, m_pData->m_String,
-                 m_pData->m_nDataLength) == 0;
-}
-
-bool CFX_WideString::operator<(const CFX_WideString& str) const {
-  if (m_pData == str.m_pData)
-    return false;
-
-  int result =
-      wmemcmp(c_str(), str.c_str(), std::min(GetLength(), str.GetLength()));
-  return result < 0 || (result == 0 && GetLength() < str.GetLength());
-}
-
-void CFX_WideString::AssignCopy(const wchar_t* pSrcData, FX_STRSIZE nSrcLen) {
-  AllocBeforeWrite(nSrcLen);
-  m_pData->CopyContents(pSrcData, nSrcLen);
-  m_pData->m_nDataLength = nSrcLen;
-}
-
-void CFX_WideString::ReallocBeforeWrite(FX_STRSIZE nNewLength) {
-  if (m_pData && m_pData->CanOperateInPlace(nNewLength))
-    return;
-
-  if (nNewLength <= 0) {
-    clear();
-    return;
-  }
-
-  CFX_RetainPtr<StringData> pNewData(StringData::Create(nNewLength));
-  if (m_pData) {
-    FX_STRSIZE nCopyLength = std::min(m_pData->m_nDataLength, nNewLength);
-    pNewData->CopyContents(m_pData->m_String, nCopyLength);
-    pNewData->m_nDataLength = nCopyLength;
-  } else {
-    pNewData->m_nDataLength = 0;
-  }
-  pNewData->m_String[pNewData->m_nDataLength] = 0;
-  m_pData.Swap(pNewData);
-}
-
-void CFX_WideString::AllocBeforeWrite(FX_STRSIZE nNewLength) {
-  if (m_pData && m_pData->CanOperateInPlace(nNewLength))
-    return;
-
-  if (nNewLength <= 0) {
-    clear();
-    return;
-  }
-
-  m_pData.Reset(StringData::Create(nNewLength));
-}
-
-void CFX_WideString::ReleaseBuffer(FX_STRSIZE nNewLength) {
-  if (!m_pData)
-    return;
-
-  if (nNewLength == -1)
-    nNewLength = FXSYS_wcslen(m_pData->m_String);
-
-  nNewLength = std::min(nNewLength, m_pData->m_nAllocLength);
-  if (nNewLength == 0) {
-    clear();
-    return;
-  }
-
-  ASSERT(m_pData->m_nRefs == 1);
-  m_pData->m_nDataLength = nNewLength;
-  m_pData->m_String[nNewLength] = 0;
-  if (m_pData->m_nAllocLength - nNewLength >= 32) {
-    // Over arbitrary threshold, so pay the price to relocate.  Force copy to
-    // always occur by holding a second reference to the string.
-    CFX_WideString preserve(*this);
-    ReallocBeforeWrite(nNewLength);
-  }
-}
-
-void CFX_WideString::Reserve(FX_STRSIZE len) {
-  GetBuffer(len);
-}
-
-wchar_t* CFX_WideString::GetBuffer(FX_STRSIZE nMinBufLength) {
-  if (!m_pData) {
-    if (nMinBufLength == 0)
-      return nullptr;
-
-    m_pData.Reset(StringData::Create(nMinBufLength));
-    m_pData->m_nDataLength = 0;
-    m_pData->m_String[0] = 0;
-    return m_pData->m_String;
-  }
-
-  if (m_pData->CanOperateInPlace(nMinBufLength))
-    return m_pData->m_String;
-
-  nMinBufLength = std::max(nMinBufLength, m_pData->m_nDataLength);
-  if (nMinBufLength == 0)
-    return nullptr;
-
-  CFX_RetainPtr<StringData> pNewData(StringData::Create(nMinBufLength));
-  pNewData->CopyContents(*m_pData);
-  pNewData->m_nDataLength = m_pData->m_nDataLength;
-  m_pData.Swap(pNewData);
-  return m_pData->m_String;
-}
-
-FX_STRSIZE CFX_WideString::Delete(FX_STRSIZE nIndex, FX_STRSIZE nCount) {
-  if (!m_pData)
-    return 0;
-
-  if (nIndex < 0)
-    nIndex = 0;
-
-  FX_STRSIZE nOldLength = m_pData->m_nDataLength;
-  if (nCount > 0 && nIndex < nOldLength) {
-    FX_STRSIZE mLength = nIndex + nCount;
-    if (mLength >= nOldLength) {
-      m_pData->m_nDataLength = nIndex;
-      return m_pData->m_nDataLength;
-    }
-    ReallocBeforeWrite(nOldLength);
-    int nCharsToCopy = nOldLength - mLength + 1;
-    wmemmove(m_pData->m_String + nIndex, m_pData->m_String + mLength,
-             nCharsToCopy);
-    m_pData->m_nDataLength = nOldLength - nCount;
-  }
-  return m_pData->m_nDataLength;
-}
-
-void CFX_WideString::Concat(const wchar_t* pSrcData, FX_STRSIZE nSrcLen) {
-  if (!pSrcData || nSrcLen <= 0)
-    return;
-
-  if (!m_pData) {
-    m_pData.Reset(StringData::Create(pSrcData, nSrcLen));
-    return;
-  }
-
-  if (m_pData->CanOperateInPlace(m_pData->m_nDataLength + nSrcLen)) {
-    m_pData->CopyContentsAt(m_pData->m_nDataLength, pSrcData, nSrcLen);
-    m_pData->m_nDataLength += nSrcLen;
-    return;
-  }
-
-  CFX_RetainPtr<StringData> pNewData(
-      StringData::Create(m_pData->m_nDataLength + nSrcLen));
-  pNewData->CopyContents(*m_pData);
-  pNewData->CopyContentsAt(m_pData->m_nDataLength, pSrcData, nSrcLen);
-  m_pData.Swap(pNewData);
-}
-
-CFX_ByteString CFX_WideString::UTF8Encode() const {
-  return FX_UTF8Encode(AsStringC());
-}
-
-CFX_ByteString CFX_WideString::UTF16LE_Encode() const {
-  if (!m_pData) {
-    return CFX_ByteString("\0\0", 2);
-  }
-  int len = m_pData->m_nDataLength;
-  CFX_ByteString result;
-  char* buffer = result.GetBuffer(len * 2 + 2);
-  for (int i = 0; i < len; i++) {
-    buffer[i * 2] = m_pData->m_String[i] & 0xff;
-    buffer[i * 2 + 1] = m_pData->m_String[i] >> 8;
-  }
-  buffer[len * 2] = 0;
-  buffer[len * 2 + 1] = 0;
-  result.ReleaseBuffer(len * 2 + 2);
-  return result;
-}
-
-CFX_WideString CFX_WideString::Mid(FX_STRSIZE nFirst) const {
-  if (!m_pData)
-    return CFX_WideString();
-
-  return Mid(nFirst, m_pData->m_nDataLength - nFirst);
-}
-
-CFX_WideString CFX_WideString::Mid(FX_STRSIZE nFirst, FX_STRSIZE nCount) const {
-  if (!m_pData)
-    return CFX_WideString();
-
-  nFirst = pdfium::clamp(nFirst, 0, m_pData->m_nDataLength);
-  nCount = pdfium::clamp(nCount, 0, m_pData->m_nDataLength - nFirst);
-  if (nCount == 0)
-    return CFX_WideString();
-
-  if (nFirst == 0 && nCount == m_pData->m_nDataLength)
-    return *this;
-
-  CFX_WideString dest;
-  AllocCopy(dest, nCount, nFirst);
-  return dest;
-}
-
-void CFX_WideString::AllocCopy(CFX_WideString& dest,
-                               FX_STRSIZE nCopyLen,
-                               FX_STRSIZE nCopyIndex) const {
-  if (nCopyLen <= 0)
-    return;
-
-  CFX_RetainPtr<StringData> pNewData(
-      StringData::Create(m_pData->m_String + nCopyIndex, nCopyLen));
-  dest.m_pData.Swap(pNewData);
-}
-
-bool CFX_WideString::TryVSWPrintf(FX_STRSIZE size,
-                                  const wchar_t* pFormat,
-                                  va_list argList) {
-  GetBuffer(size);
-  if (!m_pData)
-    return true;
-
-  // In the following two calls, there's always space in the buffer for
-  // a terminating NUL that's not included in nMaxLen.
-  // For vswprintf(), MSAN won't untaint the buffer on a truncated write's
-  // -1 return code even though the buffer is written. Probably just as well
-  // not to trust the vendor's implementation to write anything anyways.
-  // See https://crbug.com/705912.
-  memset(m_pData->m_String, 0, (size + 1) * sizeof(wchar_t));
-  int ret = vswprintf(m_pData->m_String, size + 1, pFormat, argList);
-  ReleaseBuffer();
-  return ret >= 0 || m_pData->m_String[size - 1] == 0;
-}
-
-void CFX_WideString::FormatV(const wchar_t* pFormat, va_list argList) {
-  va_list argListCopy;
-  FX_VA_COPY(argListCopy, argList);
-  FX_STRSIZE nMaxLen = vswprintf(nullptr, 0, pFormat, argListCopy);
-  va_end(argListCopy);
-  if (nMaxLen <= 0) {
-    nMaxLen = GuessSizeForVSWPrintf(pFormat, argListCopy);
-    if (nMaxLen <= 0)
-      return;
-  }
-  while (nMaxLen < 32 * 1024) {
-    FX_VA_COPY(argListCopy, argList);
-    bool bRetryPointless = TryVSWPrintf(nMaxLen, pFormat, argListCopy);
-    va_end(argListCopy);
-    if (bRetryPointless)
-      break;
-    nMaxLen *= 2;
-  }
-}
-
-void CFX_WideString::Format(const wchar_t* pFormat, ...) {
-  va_list argList;
-  va_start(argList, pFormat);
-  FormatV(pFormat, argList);
-  va_end(argList);
-}
-
-FX_STRSIZE CFX_WideString::Insert(FX_STRSIZE nIndex, wchar_t ch) {
-  FX_STRSIZE nNewLength = m_pData ? m_pData->m_nDataLength : 0;
-  nIndex = std::max(nIndex, 0);
-  nIndex = std::min(nIndex, nNewLength);
-  nNewLength++;
-
-  ReallocBeforeWrite(nNewLength);
-  wmemmove(m_pData->m_String + nIndex + 1, m_pData->m_String + nIndex,
-           nNewLength - nIndex);
-  m_pData->m_String[nIndex] = ch;
-  m_pData->m_nDataLength = nNewLength;
-  return nNewLength;
-}
-
-CFX_WideString CFX_WideString::Right(FX_STRSIZE nCount) const {
-  if (!m_pData)
-    return CFX_WideString();
-
-  nCount = std::max(nCount, 0);
-  if (nCount >= m_pData->m_nDataLength)
-    return *this;
-
-  CFX_WideString dest;
-  AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount);
-  return dest;
-}
-
-CFX_WideString CFX_WideString::Left(FX_STRSIZE nCount) const {
-  if (!m_pData)
-    return CFX_WideString();
-
-  nCount = std::max(nCount, 0);
-  if (nCount >= m_pData->m_nDataLength)
-    return *this;
-
-  CFX_WideString dest;
-  AllocCopy(dest, nCount, 0);
-  return dest;
-}
-
-FX_STRSIZE CFX_WideString::Find(wchar_t ch, FX_STRSIZE nStart) const {
-  if (!m_pData)
-    return -1;
-
-  if (nStart < 0 || nStart >= m_pData->m_nDataLength)
-    return -1;
-
-  const wchar_t* pStr =
-      wmemchr(m_pData->m_String + nStart, ch, m_pData->m_nDataLength - nStart);
-  return pStr ? pStr - m_pData->m_String : -1;
-}
-
-FX_STRSIZE CFX_WideString::Find(const CFX_WideStringC& pSub,
-                                FX_STRSIZE nStart) const {
-  if (!m_pData)
-    return -1;
-
-  FX_STRSIZE nLength = m_pData->m_nDataLength;
-  if (nStart > nLength)
-    return -1;
-
-  const wchar_t* pStr =
-      FX_wcsstr(m_pData->m_String + nStart, m_pData->m_nDataLength - nStart,
-                pSub.c_str(), pSub.GetLength());
-  return pStr ? (int)(pStr - m_pData->m_String) : -1;
-}
-
-void CFX_WideString::MakeLower() {
-  if (!m_pData)
-    return;
-
-  ReallocBeforeWrite(m_pData->m_nDataLength);
-  FXSYS_wcslwr(m_pData->m_String);
-}
-
-void CFX_WideString::MakeUpper() {
-  if (!m_pData)
-    return;
-
-  ReallocBeforeWrite(m_pData->m_nDataLength);
-  FXSYS_wcsupr(m_pData->m_String);
-}
-
-FX_STRSIZE CFX_WideString::Remove(wchar_t chRemove) {
-  if (!m_pData || m_pData->m_nDataLength < 1)
-    return 0;
-
-  wchar_t* pstrSource = m_pData->m_String;
-  wchar_t* pstrEnd = m_pData->m_String + m_pData->m_nDataLength;
-  while (pstrSource < pstrEnd) {
-    if (*pstrSource == chRemove)
-      break;
-    pstrSource++;
-  }
-  if (pstrSource == pstrEnd)
-    return 0;
-
-  ptrdiff_t copied = pstrSource - m_pData->m_String;
-  ReallocBeforeWrite(m_pData->m_nDataLength);
-  pstrSource = m_pData->m_String + copied;
-  pstrEnd = m_pData->m_String + m_pData->m_nDataLength;
-
-  wchar_t* pstrDest = pstrSource;
-  while (pstrSource < pstrEnd) {
-    if (*pstrSource != chRemove) {
-      *pstrDest = *pstrSource;
-      pstrDest++;
-    }
-    pstrSource++;
-  }
-
-  *pstrDest = 0;
-  FX_STRSIZE nCount = (FX_STRSIZE)(pstrSource - pstrDest);
-  m_pData->m_nDataLength -= nCount;
-  return nCount;
-}
-
-FX_STRSIZE CFX_WideString::Replace(const CFX_WideStringC& pOld,
-                                   const CFX_WideStringC& pNew) {
-  if (!m_pData || pOld.IsEmpty())
-    return 0;
-
-  FX_STRSIZE nSourceLen = pOld.GetLength();
-  FX_STRSIZE nReplacementLen = pNew.GetLength();
-  FX_STRSIZE nCount = 0;
-  const wchar_t* pStart = m_pData->m_String;
-  wchar_t* pEnd = m_pData->m_String + m_pData->m_nDataLength;
-  while (1) {
-    const wchar_t* pTarget = FX_wcsstr(pStart, (FX_STRSIZE)(pEnd - pStart),
-                                       pOld.c_str(), nSourceLen);
-    if (!pTarget)
-      break;
-
-    nCount++;
-    pStart = pTarget + nSourceLen;
-  }
-  if (nCount == 0)
-    return 0;
-
-  FX_STRSIZE nNewLength =
-      m_pData->m_nDataLength + (nReplacementLen - nSourceLen) * nCount;
-
-  if (nNewLength == 0) {
-    clear();
-    return nCount;
-  }
-
-  CFX_RetainPtr<StringData> pNewData(StringData::Create(nNewLength));
-  pStart = m_pData->m_String;
-  wchar_t* pDest = pNewData->m_String;
-  for (FX_STRSIZE i = 0; i < nCount; i++) {
-    const wchar_t* pTarget = FX_wcsstr(pStart, (FX_STRSIZE)(pEnd - pStart),
-                                       pOld.c_str(), nSourceLen);
-    wmemcpy(pDest, pStart, pTarget - pStart);
-    pDest += pTarget - pStart;
-    wmemcpy(pDest, pNew.c_str(), pNew.GetLength());
-    pDest += pNew.GetLength();
-    pStart = pTarget + nSourceLen;
-  }
-  wmemcpy(pDest, pStart, pEnd - pStart);
-  m_pData.Swap(pNewData);
-  return nCount;
-}
-
-void CFX_WideString::SetAt(FX_STRSIZE nIndex, wchar_t ch) {
-  if (!m_pData) {
-    return;
-  }
-  ASSERT(nIndex >= 0);
-  ASSERT(nIndex < m_pData->m_nDataLength);
-  ReallocBeforeWrite(m_pData->m_nDataLength);
-  m_pData->m_String[nIndex] = ch;
-}
-
-// static
-CFX_WideString CFX_WideString::FromLocal(const CFX_ByteStringC& str) {
-  return FromCodePage(str, 0);
-}
-
-// static
-CFX_WideString CFX_WideString::FromCodePage(const CFX_ByteStringC& str,
-                                            uint16_t codepage) {
-  return CFX_CharMap::GetWideString(codepage, str);
-}
-
-// static
-CFX_WideString CFX_WideString::FromUTF8(const CFX_ByteStringC& str) {
-  if (str.IsEmpty())
-    return CFX_WideString();
-
-  CFX_UTF8Decoder decoder;
-  for (FX_STRSIZE i = 0; i < str.GetLength(); i++)
-    decoder.Input(str[i]);
-
-  return CFX_WideString(decoder.GetResult());
-}
-
-// static
-CFX_WideString CFX_WideString::FromUTF16LE(const unsigned short* wstr,
-                                           FX_STRSIZE wlen) {
-  if (!wstr || 0 == wlen) {
-    return CFX_WideString();
-  }
-
-  CFX_WideString result;
-  wchar_t* buf = result.GetBuffer(wlen);
-  for (int i = 0; i < wlen; i++) {
-    buf[i] = wstr[i];
-  }
-  result.ReleaseBuffer(wlen);
-  return result;
-}
-
-int CFX_WideString::Compare(const wchar_t* lpsz) const {
-  if (m_pData)
-    return FXSYS_wcscmp(m_pData->m_String, lpsz);
-  return (!lpsz || lpsz[0] == 0) ? 0 : -1;
-}
-
-int CFX_WideString::Compare(const CFX_WideString& str) const {
-  if (!m_pData) {
-    if (!str.m_pData) {
-      return 0;
-    }
-    return -1;
-  }
-  if (!str.m_pData) {
-    return 1;
-  }
-  int this_len = m_pData->m_nDataLength;
-  int that_len = str.m_pData->m_nDataLength;
-  int min_len = this_len < that_len ? this_len : that_len;
-  for (int i = 0; i < min_len; i++) {
-    if (m_pData->m_String[i] < str.m_pData->m_String[i]) {
-      return -1;
-    }
-    if (m_pData->m_String[i] > str.m_pData->m_String[i]) {
-      return 1;
-    }
-  }
-  if (this_len < that_len) {
-    return -1;
-  }
-  if (this_len > that_len) {
-    return 1;
-  }
-  return 0;
-}
-
-int CFX_WideString::CompareNoCase(const wchar_t* lpsz) const {
-  if (!m_pData) {
-    return (!lpsz || lpsz[0] == 0) ? 0 : -1;
-  }
-  return FXSYS_wcsicmp(m_pData->m_String, lpsz);
-}
-
-FX_STRSIZE CFX_WideString::WStringLength(const unsigned short* str) {
-  FX_STRSIZE len = 0;
-  if (str)
-    while (str[len])
-      len++;
-  return len;
-}
-
-void CFX_WideString::TrimRight(const CFX_WideStringC& pTargets) {
-  if (IsEmpty() || pTargets.IsEmpty())
-    return;
-
-  FX_STRSIZE pos = GetLength();
-  while (pos && pTargets.Find(m_pData->m_String[pos - 1]) != -1)
-    pos--;
-
-  if (pos < m_pData->m_nDataLength) {
-    ReallocBeforeWrite(m_pData->m_nDataLength);
-    m_pData->m_String[pos] = 0;
-    m_pData->m_nDataLength = pos;
-  }
-}
-
-void CFX_WideString::TrimRight(wchar_t chTarget) {
-  wchar_t str[2] = {chTarget, 0};
-  TrimRight(str);
-}
-
-void CFX_WideString::TrimRight() {
-  TrimRight(L"\x09\x0a\x0b\x0c\x0d\x20");
-}
-
-void CFX_WideString::TrimLeft(const CFX_WideStringC& pTargets) {
-  if (!m_pData || pTargets.IsEmpty())
-    return;
-
-  FX_STRSIZE len = GetLength();
-  if (len < 1)
-    return;
-
-  FX_STRSIZE pos = 0;
-  while (pos < len) {
-    FX_STRSIZE i = 0;
-    while (i < pTargets.GetLength() &&
-           pTargets.CharAt(i) != m_pData->m_String[pos]) {
-      i++;
-    }
-    if (i == pTargets.GetLength()) {
-      break;
-    }
-    pos++;
-  }
-  if (pos) {
-    ReallocBeforeWrite(len);
-    FX_STRSIZE nDataLength = len - pos;
-    FXSYS_memmove(m_pData->m_String, m_pData->m_String + pos,
-                  (nDataLength + 1) * sizeof(wchar_t));
-    m_pData->m_nDataLength = nDataLength;
-  }
-}
-
-void CFX_WideString::TrimLeft(wchar_t chTarget) {
-  wchar_t str[2] = {chTarget, 0};
-  TrimLeft(str);
-}
-
-void CFX_WideString::TrimLeft() {
-  TrimLeft(L"\x09\x0a\x0b\x0c\x0d\x20");
-}
-float FX_wtof(const wchar_t* str, int len) {
-  if (len == 0) {
-    return 0.0;
-  }
-  int cc = 0;
-  bool bNegative = false;
-  if (str[0] == '+') {
-    cc++;
-  } else if (str[0] == '-') {
-    bNegative = true;
-    cc++;
-  }
-  int integer = 0;
-  while (cc < len) {
-    if (str[cc] == '.') {
-      break;
-    }
-    integer = integer * 10 + FXSYS_toDecimalDigit(str[cc]);
-    cc++;
-  }
-  float fraction = 0;
-  if (str[cc] == '.') {
-    cc++;
-    float scale = 0.1f;
-    while (cc < len) {
-      fraction += scale * FXSYS_toDecimalDigit(str[cc]);
-      scale *= 0.1f;
-      cc++;
-    }
-  }
-  fraction += (float)integer;
-  return bNegative ? -fraction : fraction;
-}
-
-int CFX_WideString::GetInteger() const {
-  return m_pData ? FXSYS_wtoi(m_pData->m_String) : 0;
-}
-
-float CFX_WideString::GetFloat() const {
-  return m_pData ? FX_wtof(m_pData->m_String, m_pData->m_nDataLength) : 0.0f;
-}
-
-// static
-CFX_ByteString CFX_CharMap::GetByteString(uint16_t codepage,
-                                          const CFX_WideStringC& wstr) {
-  ASSERT(IsValidCodePage(codepage));
-  int src_len = wstr.GetLength();
-  int dest_len = FXSYS_WideCharToMultiByte(codepage, 0, wstr.c_str(), src_len,
-                                           nullptr, 0, nullptr, nullptr);
-  CFX_ByteString bstr;
-  if (dest_len) {
-    char* dest_buf = bstr.GetBuffer(dest_len);
-    FXSYS_WideCharToMultiByte(codepage, 0, wstr.c_str(), src_len, dest_buf,
-                              dest_len, nullptr, nullptr);
-    bstr.ReleaseBuffer(dest_len);
-  }
-  return bstr;
-}
-
-// static
-CFX_WideString CFX_CharMap::GetWideString(uint16_t codepage,
-                                          const CFX_ByteStringC& bstr) {
-  ASSERT(IsValidCodePage(codepage));
-  int src_len = bstr.GetLength();
-  int dest_len =
-      FXSYS_MultiByteToWideChar(codepage, 0, bstr.c_str(), src_len, nullptr, 0);
-  CFX_WideString wstr;
-  if (dest_len) {
-    wchar_t* dest_buf = wstr.GetBuffer(dest_len);
-    FXSYS_MultiByteToWideChar(codepage, 0, bstr.c_str(), src_len, dest_buf,
-                              dest_len);
-    wstr.ReleaseBuffer(dest_len);
-  }
-  return wstr;
-}