Cleanup the xfa/src/fgas directory.

This CL moves the code from xfa/src/fgas/src up one level. It then takes the
headers in xfa/src/fgas/include and moves them to their correct folder. The
src/ and include/ directories are then removed.

In some cases, when moving from include/ there was another header with the
same name. Those headers were either folded together, or the content of the
conflicting folder moved to an anonymous namespace in the cpp file as they were
not used anywhere else.

Files with duplicate names as core/src/crt were renamed to be fgas_ instead of
fx_. (e.g. fgas_system.h, fgas_memory.h, fgas_stream.h)

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1776303002 .

1 files changed, 306 insertions, 0 deletions

diff --git a/xfa/src/fgas/crt/fgas_algorithm.cpp b/xfa/src/fgas/crt/fgas_algorithm.cpp
new file mode 100644
index 0000000000..60b43ac886
--- /dev/null
+++ b/xfa/src/fgas/crt/fgas_algorithm.cpp
@@ -0,0 +1,306 @@
+// 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 "xfa/src/fgas/crt/fgas_algorithm.h"
+
+#include "core/include/fxcrt/fx_basic.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static const FX_CHAR g_FXBase64EncoderMap[64] = {
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
+    'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
+    'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/',
+};
+
+struct FX_BASE64DATA {
+  FX_DWORD data1 : 2;
+  FX_DWORD data2 : 6;
+  FX_DWORD data3 : 4;
+  FX_DWORD data4 : 4;
+  FX_DWORD data5 : 6;
+  FX_DWORD data6 : 2;
+  FX_DWORD data7 : 8;
+};
+
+static void FX_Base64EncodePiece(const FX_BASE64DATA& src,
+                                 int32_t iBytes,
+                                 FX_CHAR dst[4]) {
+  dst[0] = g_FXBase64EncoderMap[src.data2];
+  FX_DWORD b = src.data1 << 4;
+  if (iBytes > 1) {
+    b |= src.data4;
+  }
+  dst[1] = g_FXBase64EncoderMap[b];
+  if (iBytes > 1) {
+    b = src.data3 << 2;
+    if (iBytes > 2) {
+      b |= src.data6;
+    }
+    dst[2] = g_FXBase64EncoderMap[b];
+    if (iBytes > 2) {
+      dst[3] = g_FXBase64EncoderMap[src.data5];
+    } else {
+      dst[3] = '=';
+    }
+  } else {
+    dst[2] = dst[3] = '=';
+  }
+}
+int32_t FX_Base64EncodeA(const uint8_t* pSrc, int32_t iSrcLen, FX_CHAR* pDst) {
+  FXSYS_assert(pSrc != NULL);
+  if (iSrcLen < 1) {
+    return 0;
+  }
+  if (pDst == NULL) {
+    int32_t iDstLen = iSrcLen / 3 * 4;
+    if ((iSrcLen % 3) != 0) {
+      iDstLen += 4;
+    }
+    return iDstLen;
+  }
+  FX_BASE64DATA srcData;
+  int32_t iBytes = 3;
+  FX_CHAR* pDstEnd = pDst;
+  while (iSrcLen > 0) {
+    if (iSrcLen > 2) {
+      ((uint8_t*)&srcData)[0] = *pSrc++;
+      ((uint8_t*)&srcData)[1] = *pSrc++;
+      ((uint8_t*)&srcData)[2] = *pSrc++;
+      iSrcLen -= 3;
+    } else {
+      *((FX_DWORD*)&srcData) = 0;
+      ((uint8_t*)&srcData)[0] = *pSrc++;
+      if (iSrcLen > 1) {
+        ((uint8_t*)&srcData)[1] = *pSrc++;
+      }
+      iBytes = iSrcLen;
+      iSrcLen = 0;
+    }
+    FX_Base64EncodePiece(srcData, iBytes, pDstEnd);
+    pDstEnd += 4;
+  }
+  return pDstEnd - pDst;
+}
+
+static const uint8_t g_FXBase64DecoderMap[256] = {
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x3E, 0xFF, 0xFF, 0xFF, 0x3F,
+    0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
+    0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
+    0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24,
+    0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
+    0x31, 0x32, 0x33, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+    0xFF, 0xFF, 0xFF, 0xFF,
+};
+static void FX_Base64DecodePiece(const FX_CHAR src[4],
+                                 int32_t iChars,
+                                 FX_BASE64DATA& dst,
+                                 int32_t& iBytes) {
+  FXSYS_assert(iChars > 0 && iChars < 5);
+  iBytes = 1;
+  dst.data2 = g_FXBase64DecoderMap[(uint8_t)src[0]];
+  if (iChars > 1) {
+    uint8_t b = g_FXBase64DecoderMap[(uint8_t)src[1]];
+    dst.data1 = b >> 4;
+    dst.data4 = b;
+    if (iChars > 2) {
+      iBytes = 2;
+      b = g_FXBase64DecoderMap[(uint8_t)src[2]];
+      dst.data3 = b >> 2;
+      dst.data6 = b;
+      if (iChars > 3) {
+        iBytes = 3;
+        dst.data5 = g_FXBase64DecoderMap[(uint8_t)src[3]];
+      } else {
+        dst.data5 = 0;
+      }
+    } else {
+      dst.data3 = 0;
+    }
+  } else {
+    dst.data1 = 0;
+  }
+}
+int32_t FX_Base64DecodeA(const FX_CHAR* pSrc, int32_t iSrcLen, uint8_t* pDst) {
+  FXSYS_assert(pSrc != NULL);
+  if (iSrcLen < 1) {
+    return 0;
+  }
+  while (iSrcLen > 0 && pSrc[iSrcLen - 1] == '=') {
+    iSrcLen--;
+  }
+  if (iSrcLen < 1) {
+    return 0;
+  }
+  if (pDst == NULL) {
+    int32_t iDstLen = iSrcLen / 4 * 3;
+    iSrcLen %= 4;
+    if (iSrcLen == 1) {
+      iDstLen += 1;
+    } else if (iSrcLen == 2) {
+      iDstLen += 1;
+    } else if (iSrcLen == 3) {
+      iDstLen += 2;
+    }
+    return iDstLen;
+  }
+  FX_CHAR srcData[4];
+  FX_BASE64DATA dstData;
+  int32_t iChars = 4, iBytes;
+  uint8_t* pDstEnd = pDst;
+  while (iSrcLen > 0) {
+    if (iSrcLen > 3) {
+      *((FX_DWORD*)srcData) = *((FX_DWORD*)pSrc);
+      pSrc += 4;
+      iSrcLen -= 4;
+    } else {
+      *((FX_DWORD*)&dstData) = 0;
+      *((FX_DWORD*)srcData) = 0;
+      srcData[0] = *pSrc++;
+      if (iSrcLen > 1) {
+        srcData[1] = *pSrc++;
+      }
+      if (iSrcLen > 2) {
+        srcData[2] = *pSrc++;
+      }
+      iChars = iSrcLen;
+      iSrcLen = 0;
+    }
+    FX_Base64DecodePiece(srcData, iChars, dstData, iBytes);
+    *pDstEnd++ = ((uint8_t*)&dstData)[0];
+    if (iBytes > 1) {
+      *pDstEnd++ = ((uint8_t*)&dstData)[1];
+    }
+    if (iBytes > 2) {
+      *pDstEnd++ = ((uint8_t*)&dstData)[2];
+    }
+  }
+  return pDstEnd - pDst;
+}
+int32_t FX_Base64DecodeW(const FX_WCHAR* pSrc, int32_t iSrcLen, uint8_t* pDst) {
+  FXSYS_assert(pSrc != NULL);
+  if (iSrcLen < 1) {
+    return 0;
+  }
+  while (iSrcLen > 0 && pSrc[iSrcLen - 1] == '=') {
+    iSrcLen--;
+  }
+  if (iSrcLen < 1) {
+    return 0;
+  }
+  if (pDst == NULL) {
+    int32_t iDstLen = iSrcLen / 4 * 3;
+    iSrcLen %= 4;
+    if (iSrcLen == 1) {
+      iDstLen += 1;
+    } else if (iSrcLen == 2) {
+      iDstLen += 1;
+    } else if (iSrcLen == 3) {
+      iDstLen += 2;
+    }
+    return iDstLen;
+  }
+  FX_CHAR srcData[4];
+  FX_BASE64DATA dstData;
+  int32_t iChars = 4, iBytes;
+  uint8_t* pDstEnd = pDst;
+  while (iSrcLen > 0) {
+    if (iSrcLen > 3) {
+      srcData[0] = (FX_CHAR)*pSrc++;
+      srcData[1] = (FX_CHAR)*pSrc++;
+      srcData[2] = (FX_CHAR)*pSrc++;
+      srcData[3] = (FX_CHAR)*pSrc++;
+      iSrcLen -= 4;
+    } else {
+      *((FX_DWORD*)&dstData) = 0;
+      *((FX_DWORD*)srcData) = 0;
+      srcData[0] = (FX_CHAR)*pSrc++;
+      if (iSrcLen > 1) {
+        srcData[1] = (FX_CHAR)*pSrc++;
+      }
+      if (iSrcLen > 2) {
+        srcData[2] = (FX_CHAR)*pSrc++;
+      }
+      iChars = iSrcLen;
+      iSrcLen = 0;
+    }
+    FX_Base64DecodePiece(srcData, iChars, dstData, iBytes);
+    *pDstEnd++ = ((uint8_t*)&dstData)[0];
+    if (iBytes > 1) {
+      *pDstEnd++ = ((uint8_t*)&dstData)[1];
+    }
+    if (iBytes > 2) {
+      *pDstEnd++ = ((uint8_t*)&dstData)[2];
+    }
+  }
+  return pDstEnd - pDst;
+}
+
+static const uint8_t g_FXHex2DecMap[256] = {
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  1,  2,  3, 4, 5, 6, 7, 8, 9,  0,  0,
+    0,  0,  0,  0, 0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 10, 11, 12,
+    13, 14, 15, 0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0,  0,  0,
+    0,  0,  0,  0, 0, 0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0,
+};
+uint8_t FX_Hex2Dec(uint8_t hexHigh, uint8_t hexLow) {
+  return (g_FXHex2DecMap[hexHigh] << 4) + g_FXHex2DecMap[hexLow];
+}
+int32_t FX_SeparateStringW(const FX_WCHAR* pStr,
+                           int32_t iStrLen,
+                           FX_WCHAR delimiter,
+                           CFX_WideStringArray& pieces) {
+  if (pStr == NULL) {
+    return 0;
+  }
+  if (iStrLen < 0) {
+    iStrLen = FXSYS_wcslen(pStr);
+  }
+  const FX_WCHAR* pToken = pStr;
+  const FX_WCHAR* pEnd = pStr + iStrLen;
+  while (TRUE) {
+    if (pStr >= pEnd || delimiter == *pStr) {
+      CFX_WideString sub(pToken, pStr - pToken);
+      pieces.Add(sub);
+      pToken = pStr + 1;
+      if (pStr >= pEnd) {
+        break;
+      }
+    }
+    pStr++;
+  }
+  return pieces.GetSize();
+}
+#ifdef __cplusplus
+}
+#endif