Remove CXML

This CL deletes the CXML parser as it is no longer used.

Change-Id: Ic4815b683515ee860a6ae5c7ca39e15573e584bc
Reviewed-on: https://pdfium-review.googlesource.com/30694
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>

1 files changed, 0 insertions, 531 deletions

diff --git a/core/fxcrt/xml/cxml_parser.cpp b/core/fxcrt/xml/cxml_parser.cpp
deleted file mode 100644
index 64bb0ec530..0000000000
--- a/core/fxcrt/xml/cxml_parser.cpp
+++ /dev/null
@@ -1,531 +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 <algorithm>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "core/fxcrt/cfx_utf8decoder.h"
-#include "core/fxcrt/cfx_widetextbuf.h"
-#include "core/fxcrt/fx_extension.h"
-#include "core/fxcrt/fx_fallthrough.h"
-#include "core/fxcrt/xml/cxml_content.h"
-#include "core/fxcrt/xml/cxml_element.h"
-#include "core/fxcrt/xml/cxml_parser.h"
-#include "third_party/base/ptr_util.h"
-#include "third_party/base/stl_util.h"
-
-namespace {
-
-#define FXCRTM_XML_CHARTYPE_Normal 0x00
-#define FXCRTM_XML_CHARTYPE_SpaceChar 0x01
-#define FXCRTM_XML_CHARTYPE_Letter 0x02
-#define FXCRTM_XML_CHARTYPE_Digital 0x04
-#define FXCRTM_XML_CHARTYPE_NameIntro 0x08
-#define FXCRTM_XML_CHARTYPE_NameChar 0x10
-#define FXCRTM_XML_CHARTYPE_HexDigital 0x20
-#define FXCRTM_XML_CHARTYPE_HexLowerLetter 0x40
-#define FXCRTM_XML_CHARTYPE_HexUpperLetter 0x60
-#define FXCRTM_XML_CHARTYPE_HexChar 0x60
-
-const uint8_t g_FXCRT_XML_ByteTypes[256] = {
-    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
-    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
-    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00,
-    0x34, 0x34, 0x34, 0x34, 0x34, 0x34, 0x34, 0x34, 0x34, 0x34, 0x08, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x7A, 0x7A, 0x7A, 0x7A, 0x7A, 0x7A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x00, 0x00, 0x00, 0x00, 0x18,
-    0x00, 0x5A, 0x5A, 0x5A, 0x5A, 0x5A, 0x5A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A, 0x1A,
-    0x1A, 0x1A, 0x01, 0x01,
-};
-
-constexpr int kMaxDepth = 1024;
-
-bool g_FXCRT_XML_IsWhiteSpace(uint8_t ch) {
-  return !!(g_FXCRT_XML_ByteTypes[ch] & FXCRTM_XML_CHARTYPE_SpaceChar);
-}
-
-bool g_FXCRT_XML_IsDigital(uint8_t ch) {
-  return !!(g_FXCRT_XML_ByteTypes[ch] & FXCRTM_XML_CHARTYPE_Digital);
-}
-
-bool g_FXCRT_XML_IsNameIntro(uint8_t ch) {
-  return !!(g_FXCRT_XML_ByteTypes[ch] & FXCRTM_XML_CHARTYPE_NameIntro);
-}
-
-bool g_FXCRT_XML_IsNameChar(uint8_t ch) {
-  return !!(g_FXCRT_XML_ByteTypes[ch] & FXCRTM_XML_CHARTYPE_NameChar);
-}
-
-}  // namespace
-
-CXML_Parser::CXML_Parser()
-    : m_nOffset(0),
-      m_pBuffer(nullptr),
-      m_dwBufferSize(0),
-      m_nBufferOffset(0),
-      m_dwIndex(0) {}
-
-CXML_Parser::~CXML_Parser() {}
-
-bool CXML_Parser::Init(const uint8_t* pBuffer, size_t size) {
-  m_pDataAcc = pdfium::MakeUnique<CXML_DataBufAcc>(pBuffer, size);
-  m_nOffset = 0;
-  return ReadNextBlock();
-}
-
-bool CXML_Parser::ReadNextBlock() {
-  if (!m_pDataAcc->ReadNextBlock())
-    return false;
-
-  m_pBuffer = m_pDataAcc->GetBlockBuffer();
-  m_dwBufferSize = m_pDataAcc->GetBlockSize();
-  m_nBufferOffset = 0;
-  m_dwIndex = 0;
-  return m_dwBufferSize > 0;
-}
-
-bool CXML_Parser::IsEOF() {
-  return m_pDataAcc->IsEOF() && m_dwIndex >= m_dwBufferSize;
-}
-
-void CXML_Parser::SkipWhiteSpaces() {
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF())
-    return;
-
-  do {
-    while (m_dwIndex < m_dwBufferSize &&
-           g_FXCRT_XML_IsWhiteSpace(m_pBuffer[m_dwIndex])) {
-      m_dwIndex++;
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-}
-
-void CXML_Parser::GetName(ByteString* space, ByteString* name) {
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF())
-    return;
-
-  std::ostringstream buf;
-  do {
-    while (m_dwIndex < m_dwBufferSize) {
-      uint8_t ch = m_pBuffer[m_dwIndex];
-      if (ch == ':') {
-        *space = ByteString(buf);
-        buf.str("");
-      } else if (g_FXCRT_XML_IsNameChar(ch)) {
-        buf << static_cast<char>(ch);
-      } else {
-        break;
-      }
-      m_dwIndex++;
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-  *name = ByteString(buf);
-}
-
-void CXML_Parser::SkipLiterals(const ByteStringView& str) {
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF()) {
-    return;
-  }
-  int32_t i = 0, iLen = str.GetLength();
-  do {
-    while (m_dwIndex < m_dwBufferSize) {
-      if (str[i] != m_pBuffer[m_dwIndex++]) {
-        i = 0;
-        continue;
-      }
-      i++;
-      if (i == iLen)
-        break;
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (i == iLen)
-      return;
-
-    if (m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-  while (!m_pDataAcc->IsEOF()) {
-    ReadNextBlock();
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwBufferSize);
-  }
-  m_dwIndex = m_dwBufferSize;
-}
-
-uint32_t CXML_Parser::GetCharRef() {
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF())
-    return 0;
-
-  uint8_t ch;
-  int32_t iState = 0;
-  std::ostringstream buf;
-  uint32_t code = 0;
-  do {
-    while (m_dwIndex < m_dwBufferSize) {
-      ch = m_pBuffer[m_dwIndex];
-      switch (iState) {
-        case 0:
-          if (ch == '#') {
-            m_dwIndex++;
-            iState = 2;
-            break;
-          }
-          iState = 1;
-          FX_FALLTHROUGH;
-        case 1:
-          m_dwIndex++;
-          if (ch == ';') {
-            std::string ref = buf.str();
-            if (ref == "gt")
-              code = '>';
-            else if (ref == "lt")
-              code = '<';
-            else if (ref == "amp")
-              code = '&';
-            else if (ref == "apos")
-              code = '\'';
-            else if (ref == "quot")
-              code = '"';
-            iState = 10;
-            break;
-          }
-          buf << static_cast<char>(ch);
-          break;
-        case 2:
-          if (ch == 'x') {
-            m_dwIndex++;
-            iState = 4;
-            break;
-          }
-          iState = 3;
-          FX_FALLTHROUGH;
-        case 3:
-          m_dwIndex++;
-          if (ch == ';') {
-            iState = 10;
-            break;
-          }
-          if (g_FXCRT_XML_IsDigital(ch))
-            code = code * 10 + FXSYS_DecimalCharToInt(static_cast<wchar_t>(ch));
-          break;
-        case 4:
-          m_dwIndex++;
-          if (ch == ';') {
-            iState = 10;
-            break;
-          }
-          uint8_t nHex =
-              g_FXCRT_XML_ByteTypes[ch] & FXCRTM_XML_CHARTYPE_HexChar;
-          if (nHex) {
-            if (nHex == FXCRTM_XML_CHARTYPE_HexDigital) {
-              code = (code << 4) +
-                     FXSYS_DecimalCharToInt(static_cast<wchar_t>(ch));
-            } else if (nHex == FXCRTM_XML_CHARTYPE_HexLowerLetter) {
-              code = (code << 4) + ch - 87;
-            } else {
-              code = (code << 4) + ch - 55;
-            }
-          }
-          break;
-      }
-      if (iState == 10)
-        break;
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (iState == 10 || m_dwIndex < m_dwBufferSize || IsEOF()) {
-      break;
-    }
-  } while (ReadNextBlock());
-  return code;
-}
-
-WideString CXML_Parser::GetAttrValue() {
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF())
-    return WideString();
-
-  CFX_UTF8Decoder decoder;
-  uint8_t mark = 0;
-  uint8_t ch = 0;
-  do {
-    while (m_dwIndex < m_dwBufferSize) {
-      ch = m_pBuffer[m_dwIndex];
-      if (mark == 0) {
-        if (ch != '\'' && ch != '"')
-          return WideString();
-
-        mark = ch;
-        m_dwIndex++;
-        ch = 0;
-        continue;
-      }
-      m_dwIndex++;
-      if (ch == mark)
-        break;
-
-      if (ch == '&') {
-        decoder.AppendCodePoint(GetCharRef());
-        if (IsEOF())
-          return WideString(decoder.GetResult());
-      } else {
-        decoder.Input(ch);
-      }
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (ch == mark || m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-  return WideString(decoder.GetResult());
-}
-
-void CXML_Parser::GetTagName(bool bStartTag,
-                             bool* bEndTag,
-                             ByteString* space,
-                             ByteString* name) {
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF())
-    return;
-
-  *bEndTag = false;
-  uint8_t ch;
-  int32_t iState = bStartTag ? 1 : 0;
-  do {
-    while (m_dwIndex < m_dwBufferSize) {
-      ch = m_pBuffer[m_dwIndex];
-      switch (iState) {
-        case 0:
-          m_dwIndex++;
-          if (ch != '<')
-            break;
-
-          iState = 1;
-          break;
-        case 1:
-          if (ch == '?') {
-            m_dwIndex++;
-            SkipLiterals("?>");
-            iState = 0;
-            break;
-          }
-          if (ch == '!') {
-            m_dwIndex++;
-            SkipLiterals("-->");
-            iState = 0;
-            break;
-          }
-          if (ch == '/') {
-            m_dwIndex++;
-            GetName(space, name);
-            *bEndTag = true;
-          } else {
-            GetName(space, name);
-            *bEndTag = false;
-          }
-          return;
-      }
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-}
-
-std::unique_ptr<CXML_Element> CXML_Parser::ParseElement(CXML_Element* pParent,
-                                                        bool bStartTag) {
-  return ParseElementInternal(pParent, bStartTag, 0);
-}
-
-std::unique_ptr<CXML_Element> CXML_Parser::ParseElementInternal(
-    CXML_Element* pParent,
-    bool bStartTag,
-    int nDepth) {
-  if (nDepth > kMaxDepth)
-    return nullptr;
-
-  m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-  if (IsEOF())
-    return nullptr;
-
-  ByteString tag_name;
-  ByteString tag_space;
-  bool bEndTag;
-  GetTagName(bStartTag, &bEndTag, &tag_space, &tag_name);
-  if (tag_name.IsEmpty() || bEndTag)
-    return nullptr;
-
-  auto pElement = pdfium::MakeUnique<CXML_Element>(
-      pParent, tag_space.AsStringView(), tag_name.AsStringView());
-  do {
-    ByteString attr_space;
-    ByteString attr_name;
-    while (m_dwIndex < m_dwBufferSize) {
-      SkipWhiteSpaces();
-      if (IsEOF())
-        break;
-
-      if (!g_FXCRT_XML_IsNameIntro(m_pBuffer[m_dwIndex]))
-        break;
-
-      GetName(&attr_space, &attr_name);
-      SkipWhiteSpaces();
-      if (IsEOF())
-        break;
-
-      if (m_pBuffer[m_dwIndex] != '=')
-        break;
-
-      m_dwIndex++;
-      SkipWhiteSpaces();
-      if (IsEOF())
-        break;
-
-      WideString attr_value = GetAttrValue();
-      pElement->SetAttribute(attr_space, attr_name, attr_value);
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-  SkipWhiteSpaces();
-  if (IsEOF())
-    return pElement;
-
-  uint8_t ch = m_pBuffer[m_dwIndex++];
-  if (ch == '/') {
-    m_dwIndex++;
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    return pElement;
-  }
-  if (ch != '>') {
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    return nullptr;
-  }
-  SkipWhiteSpaces();
-  if (IsEOF())
-    return pElement;
-
-  CFX_UTF8Decoder decoder;
-  CFX_WideTextBuf content;
-  bool bCDATA = false;
-  int32_t iState = 0;
-  do {
-    while (m_dwIndex < m_dwBufferSize) {
-      ch = m_pBuffer[m_dwIndex++];
-      switch (iState) {
-        case 0:
-          if (ch == '<') {
-            iState = 1;
-          } else if (ch == '&') {
-            decoder.ClearStatus();
-            decoder.AppendCodePoint(GetCharRef());
-          } else {
-            decoder.Input(ch);
-          }
-          break;
-        case 1:
-          if (ch == '!') {
-            iState = 2;
-          } else if (ch == '?') {
-            SkipLiterals("?>");
-            SkipWhiteSpaces();
-            iState = 0;
-          } else if (ch == '/') {
-            ByteString space;
-            ByteString name;
-            GetName(&space, &name);
-            SkipWhiteSpaces();
-            m_dwIndex++;
-            iState = 10;
-          } else {
-            content << decoder.GetResult();
-            WideString dataStr = content.MakeString();
-            if (!bCDATA)
-              dataStr.TrimRight(L" \t\r\n");
-
-            InsertContentSegment(bCDATA, dataStr.AsStringView(),
-                                 pElement.get());
-            content.Clear();
-            decoder.Clear();
-            bCDATA = false;
-            iState = 0;
-            m_dwIndex--;
-            std::unique_ptr<CXML_Element> pSubElement =
-                ParseElementInternal(pElement.get(), true, nDepth + 1);
-            if (!pSubElement)
-              break;
-
-            pElement->AppendChild(std::move(pSubElement));
-            SkipWhiteSpaces();
-          }
-          break;
-        case 2:
-          if (ch == '[') {
-            SkipLiterals("]]>");
-          } else if (ch == '-') {
-            m_dwIndex++;
-            SkipLiterals("-->");
-          } else {
-            SkipLiterals(">");
-          }
-          decoder.Clear();
-          SkipWhiteSpaces();
-          iState = 0;
-          break;
-      }
-      if (iState == 10) {
-        break;
-      }
-    }
-    m_nOffset = m_nBufferOffset + static_cast<FX_FILESIZE>(m_dwIndex);
-    if (iState == 10 || m_dwIndex < m_dwBufferSize || IsEOF())
-      break;
-  } while (ReadNextBlock());
-  content << decoder.GetResult();
-  WideString dataStr = content.MakeString();
-  dataStr.TrimRight(L" \t\r\n");
-
-  InsertContentSegment(bCDATA, dataStr.AsStringView(), pElement.get());
-  content.Clear();
-  decoder.Clear();
-  bCDATA = false;
-  return pElement;
-}
-
-void CXML_Parser::InsertContentSegment(bool bCDATA,
-                                       const WideStringView& content,
-                                       CXML_Element* pElement) {
-  if (content.IsEmpty())
-    return;
-
-  pElement->AppendChild(pdfium::MakeUnique<CXML_Content>(bCDATA, content));
-}