1 files changed, 234 insertions, 0 deletions
diff --git a/core/fxcrt/cfx_bytestring.h b/core/fxcrt/cfx_bytestring.h
new file mode 100644
index 0000000000..9596fc5eee
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+++ b/core/fxcrt/cfx_bytestring.h
@@ -0,0 +1,234 @@
+// Copyright 2017 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
+
+#ifndef CORE_FXCRT_CFX_BYTESTRING_H_
+#define CORE_FXCRT_CFX_BYTESTRING_H_
+
+#include <functional>
+
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxcrt/cfx_string_c_template.h"
+#include "core/fxcrt/cfx_string_data_template.h"
+#include "core/fxcrt/fx_memory.h"
+#include "core/fxcrt/fx_system.h"
+
+class CFX_WideString;
+
+// A mutable string with shared buffers using copy-on-write semantics that
+// avoids the cost of std::string's iterator stability guarantees.
+class CFX_ByteString {
+ public:
+  using CharType = char;
+
+  CFX_ByteString();
+  CFX_ByteString(const CFX_ByteString& other);
+  CFX_ByteString(CFX_ByteString&& other) noexcept;
+
+  // Deliberately implicit to avoid calling on every string literal.
+  // NOLINTNEXTLINE(runtime/explicit)
+  CFX_ByteString(char ch);
+  // NOLINTNEXTLINE(runtime/explicit)
+  CFX_ByteString(const char* ptr);
+
+  CFX_ByteString(const char* ptr, FX_STRSIZE len);
+  CFX_ByteString(const uint8_t* ptr, FX_STRSIZE len);
+
+  explicit CFX_ByteString(const CFX_ByteStringC& bstrc);
+  CFX_ByteString(const CFX_ByteStringC& bstrc1, const CFX_ByteStringC& bstrc2);
+
+  ~CFX_ByteString();
+
+  void clear() { m_pData.Reset(); }
+
+  static CFX_ByteString FromUnicode(const wchar_t* ptr, FX_STRSIZE len = -1);
+  static CFX_ByteString FromUnicode(const CFX_WideString& str);
+
+  // Explicit conversion to C-style string.
+  // Note: Any subsequent modification of |this| will invalidate the result.
+  const char* c_str() const { return m_pData ? m_pData->m_String : ""; }
+
+  // Explicit conversion to uint8_t*.
+  // Note: Any subsequent modification of |this| will invalidate the result.
+  const uint8_t* raw_str() const {
+    return m_pData ? reinterpret_cast<const uint8_t*>(m_pData->m_String)
+                   : nullptr;
+  }
+
+  // Explicit conversion to CFX_ByteStringC.
+  // Note: Any subsequent modification of |this| will invalidate the result.
+  CFX_ByteStringC AsStringC() const {
+    return CFX_ByteStringC(raw_str(), GetLength());
+  }
+
+  FX_STRSIZE GetLength() const { return m_pData ? m_pData->m_nDataLength : 0; }
+  bool IsEmpty() const { return !GetLength(); }
+
+  int Compare(const CFX_ByteStringC& str) const;
+  bool EqualNoCase(const CFX_ByteStringC& str) const;
+
+  bool operator==(const char* ptr) const;
+  bool operator==(const CFX_ByteStringC& str) const;
+  bool operator==(const CFX_ByteString& other) const;
+
+  bool operator!=(const char* ptr) const { return !(*this == ptr); }
+  bool operator!=(const CFX_ByteStringC& str) const { return !(*this == str); }
+  bool operator!=(const CFX_ByteString& other) const {
+    return !(*this == other);
+  }
+
+  bool operator<(const CFX_ByteString& str) const;
+
+  const CFX_ByteString& operator=(const char* str);
+  const CFX_ByteString& operator=(const CFX_ByteStringC& bstrc);
+  const CFX_ByteString& operator=(const CFX_ByteString& stringSrc);
+
+  const CFX_ByteString& operator+=(char ch);
+  const CFX_ByteString& operator+=(const char* str);
+  const CFX_ByteString& operator+=(const CFX_ByteString& str);
+  const CFX_ByteString& operator+=(const CFX_ByteStringC& bstrc);
+
+  uint8_t GetAt(FX_STRSIZE nIndex) const {
+    return m_pData ? m_pData->m_String[nIndex] : 0;
+  }
+
+  uint8_t operator[](FX_STRSIZE nIndex) const {
+    return m_pData ? m_pData->m_String[nIndex] : 0;
+  }
+
+  void SetAt(FX_STRSIZE nIndex, char ch);
+  FX_STRSIZE Insert(FX_STRSIZE index, char ch);
+  FX_STRSIZE Delete(FX_STRSIZE index, FX_STRSIZE count = 1);
+
+  void Format(const char* lpszFormat, ...);
+  void FormatV(const char* lpszFormat, va_list argList);
+
+  void Reserve(FX_STRSIZE len);
+  char* GetBuffer(FX_STRSIZE len);
+  void ReleaseBuffer(FX_STRSIZE len = -1);
+
+  CFX_ByteString Mid(FX_STRSIZE first) const;
+  CFX_ByteString Mid(FX_STRSIZE first, FX_STRSIZE count) const;
+  CFX_ByteString Left(FX_STRSIZE count) const;
+  CFX_ByteString Right(FX_STRSIZE count) const;
+
+  FX_STRSIZE Find(const CFX_ByteStringC& lpszSub, FX_STRSIZE start = 0) const;
+  FX_STRSIZE Find(char ch, FX_STRSIZE start = 0) const;
+  FX_STRSIZE ReverseFind(char ch) const;
+
+  void MakeLower();
+  void MakeUpper();
+
+  void TrimRight();
+  void TrimRight(char chTarget);
+  void TrimRight(const CFX_ByteStringC& lpszTargets);
+
+  void TrimLeft();
+  void TrimLeft(char chTarget);
+  void TrimLeft(const CFX_ByteStringC& lpszTargets);
+
+  FX_STRSIZE Replace(const CFX_ByteStringC& lpszOld,
+                     const CFX_ByteStringC& lpszNew);
+
+  FX_STRSIZE Remove(char ch);
+
+  CFX_WideString UTF8Decode() const;
+
+  uint32_t GetID(FX_STRSIZE start_pos = 0) const;
+
+#define FXFORMAT_SIGNED 1
+#define FXFORMAT_HEX 2
+#define FXFORMAT_CAPITAL 4
+
+  static CFX_ByteString FormatInteger(int i, uint32_t flags = 0);
+  static CFX_ByteString FormatFloat(float f, int precision = 0);
+
+ protected:
+  using StringData = CFX_StringDataTemplate<char>;
+
+  void ReallocBeforeWrite(FX_STRSIZE nNewLen);
+  void AllocBeforeWrite(FX_STRSIZE nNewLen);
+  void AllocCopy(CFX_ByteString& dest,
+                 FX_STRSIZE nCopyLen,
+                 FX_STRSIZE nCopyIndex) const;
+  void AssignCopy(const char* pSrcData, FX_STRSIZE nSrcLen);
+  void Concat(const char* lpszSrcData, FX_STRSIZE nSrcLen);
+
+  CFX_RetainPtr<StringData> m_pData;
+
+  friend class fxcrt_ByteStringConcat_Test;
+  friend class fxcrt_ByteStringPool_Test;
+};
+
+inline bool operator==(const char* lhs, const CFX_ByteString& rhs) {
+  return rhs == lhs;
+}
+inline bool operator==(const CFX_ByteStringC& lhs, const CFX_ByteString& rhs) {
+  return rhs == lhs;
+}
+inline bool operator!=(const char* lhs, const CFX_ByteString& rhs) {
+  return rhs != lhs;
+}
+inline bool operator!=(const CFX_ByteStringC& lhs, const CFX_ByteString& rhs) {
+  return rhs != lhs;
+}
+
+inline CFX_ByteString operator+(const CFX_ByteStringC& str1,
+                                const CFX_ByteStringC& str2) {
+  return CFX_ByteString(str1, str2);
+}
+inline CFX_ByteString operator+(const CFX_ByteStringC& str1, const char* str2) {
+  return CFX_ByteString(str1, str2);
+}
+inline CFX_ByteString operator+(const char* str1, const CFX_ByteStringC& str2) {
+  return CFX_ByteString(str1, str2);
+}
+inline CFX_ByteString operator+(const CFX_ByteStringC& str1, char ch) {
+  return CFX_ByteString(str1, CFX_ByteStringC(ch));
+}
+inline CFX_ByteString operator+(char ch, const CFX_ByteStringC& str2) {
+  return CFX_ByteString(ch, str2);
+}
+inline CFX_ByteString operator+(const CFX_ByteString& str1,
+                                const CFX_ByteString& str2) {
+  return CFX_ByteString(str1.AsStringC(), str2.AsStringC());
+}
+inline CFX_ByteString operator+(const CFX_ByteString& str1, char ch) {
+  return CFX_ByteString(str1.AsStringC(), CFX_ByteStringC(ch));
+}
+inline CFX_ByteString operator+(char ch, const CFX_ByteString& str2) {
+  return CFX_ByteString(ch, str2.AsStringC());
+}
+inline CFX_ByteString operator+(const CFX_ByteString& str1, const char* str2) {
+  return CFX_ByteString(str1.AsStringC(), str2);
+}
+inline CFX_ByteString operator+(const char* str1, const CFX_ByteString& str2) {
+  return CFX_ByteString(str1, str2.AsStringC());
+}
+inline CFX_ByteString operator+(const CFX_ByteString& str1,
+                                const CFX_ByteStringC& str2) {
+  return CFX_ByteString(str1.AsStringC(), str2);
+}
+inline CFX_ByteString operator+(const CFX_ByteStringC& str1,
+                                const CFX_ByteString& str2) {
+  return CFX_ByteString(str1, str2.AsStringC());
+}
+
+uint32_t FX_HashCode_GetA(const CFX_ByteStringC& str, bool bIgnoreCase);
+
+namespace std {
+
+template <>
+struct hash<CFX_ByteString> {
+  std::size_t operator()(const CFX_ByteString& str) const {
+    return FX_HashCode_GetA(str.AsStringC(), false);
+  }
+};
+
+}  // namespace std
+
+extern template struct std::hash<CFX_ByteString>;
+
+#endif  // CORE_FXCRT_CFX_BYTESTRING_H_