Cleanup the fx_extension code.

This CL cleans up the fx_extension file. The stream code was moved to
fx_stream. IFX_FileAccess was removed and CFX_CRTFileAccess split to its
own file. Code shuffled from header to cpp file.

Change-Id: I700fdfcc9797cf4e8050cd9ba010ad8854feefbf
Reviewed-on: https://pdfium-review.googlesource.com/4371
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 103 insertions, 0 deletions

diff --git a/core/fxcrt/fx_extension.h b/core/fxcrt/fx_extension.h
new file mode 100644
index 0000000000..e9d16786a9
--- /dev/null
+++ b/core/fxcrt/fx_extension.h
@@ -0,0 +1,103 @@
+// 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
+
+#ifndef CORE_FXCRT_FX_EXTENSION_H_
+#define CORE_FXCRT_FX_EXTENSION_H_
+
+#include <cctype>
+#include <cwctype>
+#include <memory>
+
+#include "core/fxcrt/fx_basic.h"
+
+#define FX_INVALID_OFFSET static_cast<uint32_t>(-1)
+
+float FXSYS_wcstof(const wchar_t* pwsStr,
+                   int32_t iLength = -1,
+                   int32_t* pUsedLen = nullptr);
+wchar_t* FXSYS_wcsncpy(wchar_t* dstStr, const wchar_t* srcStr, size_t count);
+int32_t FXSYS_wcsnicmp(const wchar_t* s1, const wchar_t* s2, size_t count);
+
+inline bool FXSYS_islower(int32_t ch) {
+  return ch >= 'a' && ch <= 'z';
+}
+
+inline bool FXSYS_isupper(int32_t ch) {
+  return ch >= 'A' && ch <= 'Z';
+}
+
+inline int32_t FXSYS_tolower(int32_t ch) {
+  return ch < 'A' || ch > 'Z' ? ch : (ch + 0x20);
+}
+
+inline int32_t FXSYS_toupper(int32_t ch) {
+  return ch < 'a' || ch > 'z' ? ch : (ch - 0x20);
+}
+
+inline bool FXSYS_iswalpha(wchar_t wch) {
+  return (wch >= L'A' && wch <= L'Z') || (wch >= L'a' && wch <= L'z');
+}
+
+inline bool FXSYS_iswdigit(wchar_t wch) {
+  return wch >= L'0' && wch <= L'9';
+}
+
+inline bool FXSYS_iswalnum(wchar_t wch) {
+  return FXSYS_iswalpha(wch) || FXSYS_iswdigit(wch);
+}
+
+inline bool FXSYS_iswspace(wchar_t c) {
+  return (c == 0x20) || (c == 0x0d) || (c == 0x0a) || (c == 0x09);
+}
+
+inline bool FXSYS_isHexDigit(const char c) {
+  return !((c & 0x80) || !std::isxdigit(c));
+}
+
+inline int FXSYS_toHexDigit(const char c) {
+  if (!FXSYS_isHexDigit(c))
+    return 0;
+  char upchar = std::toupper(c);
+  return upchar > '9' ? upchar - 'A' + 10 : upchar - '0';
+}
+
+inline bool FXSYS_isDecimalDigit(const char c) {
+  return !((c & 0x80) || !std::isdigit(c));
+}
+
+inline bool FXSYS_isDecimalDigit(const wchar_t c) {
+  return !!std::iswdigit(c);
+}
+
+inline int FXSYS_toDecimalDigit(const char c) {
+  return FXSYS_isDecimalDigit(c) ? c - '0' : 0;
+}
+
+inline int FXSYS_toDecimalDigit(const wchar_t c) {
+  return std::iswdigit(c) ? c - L'0' : 0;
+}
+
+float FXSYS_FractionalScale(size_t scale_factor, int value);
+int FXSYS_FractionalScaleCount();
+
+void* FX_Random_MT_Start(uint32_t dwSeed);
+void FX_Random_MT_Close(void* pContext);
+uint32_t FX_Random_MT_Generate(void* pContext);
+void FX_Random_GenerateBase(uint32_t* pBuffer, int32_t iCount);
+void FX_Random_GenerateMT(uint32_t* pBuffer, int32_t iCount);
+
+#ifdef PDF_ENABLE_XFA
+struct FX_GUID {
+  uint32_t data1;
+  uint16_t data2;
+  uint16_t data3;
+  uint8_t data4[8];
+};
+void FX_GUID_CreateV4(FX_GUID* pGUID);
+CFX_ByteString FX_GUID_ToString(const FX_GUID* pGUID, bool bSeparator = true);
+#endif  // PDF_ENABLE_XFA
+
+#endif  // CORE_FXCRT_FX_EXTENSION_H_