diff options
Diffstat (limited to 'core/src/fpdfapi/fpdf_parser')
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp | 32 | ||||
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp | 163 | ||||
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp | 17 |
3 files changed, 120 insertions, 92 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp index 3ea554b2d8..e68fcb6800 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp @@ -8,7 +8,6 @@ #include "../../../include/fpdfapi/fpdf_parser.h" #include "../../../include/fpdfapi/fpdf_module.h" #include "../../../include/fxcodec/fx_codec.h" -#include "../../../include/fxcrt/fx_ext.h" #define _STREAM_MAX_SIZE_ 20 * 1024 * 1024 @@ -129,32 +128,37 @@ FX_DWORD HexDecode(const uint8_t* src_buf, } dest_buf = FX_Alloc(uint8_t, i / 2 + 1); dest_size = 0; - bool bFirst = true; + FX_BOOL bFirstDigit = TRUE; for (i = 0; i < src_size; i++) { uint8_t ch = src_buf[i]; if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t') continue; - if (ch == '>') { - ++i; + int digit; + if (ch <= '9' && ch >= '0') { + digit = ch - '0'; + } else if (ch <= 'f' && ch >= 'a') { + digit = ch - 'a' + 10; + } else if (ch <= 'F' && ch >= 'A') { + digit = ch - 'A' + 10; + } else if (ch == '>') { + i++; break; - } - if (!std::isxdigit(ch)) + } else { continue; - - int digit = FXSYS_toHexDigit(ch); - if (bFirst) + } + if (bFirstDigit) { dest_buf[dest_size] = digit * 16; - else + } else { dest_buf[dest_size++] += digit; - - bFirst = !bFirst; + } + bFirstDigit = !bFirstDigit; } - if (!bFirst) + if (!bFirstDigit) { dest_size++; + } return i; } - FX_DWORD RunLengthDecode(const uint8_t* src_buf, FX_DWORD src_size, uint8_t*& dest_buf, diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp index 949c3a4f6f..f5ada7c6eb 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp @@ -13,7 +13,6 @@ #include "../../../include/fpdfapi/fpdf_module.h" #include "../../../include/fpdfapi/fpdf_page.h" #include "../../../include/fpdfapi/fpdf_parser.h" -#include "../../../include/fxcrt/fx_ext.h" #include "../../../include/fxcrt/fx_safe_types.h" #include "../fpdf_page/pageint.h" #include "parser_int.h" @@ -164,83 +163,85 @@ FX_DWORD CPDF_Parser::StartParse(IFX_FileRead* pFileAccess, m_bXRefStream = FALSE; m_LastXRefOffset = 0; m_bOwnFileRead = bOwnFileRead; - int32_t offset = GetHeaderOffset(pFileAccess); if (offset == -1) { - if (bOwnFileRead && pFileAccess) + if (bOwnFileRead && pFileAccess) { pFileAccess->Release(); + } return PDFPARSE_ERROR_FORMAT; } m_Syntax.InitParser(pFileAccess, offset); - uint8_t ch; - if (!m_Syntax.GetCharAt(5, ch)) + if (!m_Syntax.GetCharAt(5, ch)) { return PDFPARSE_ERROR_FORMAT; - if (std::isdigit(ch)) - m_FileVersion = FXSYS_toDecimalDigit(ch) * 10; - - if (!m_Syntax.GetCharAt(7, ch)) + } + if (ch >= '0' && ch <= '9') { + m_FileVersion = (ch - '0') * 10; + } + if (!m_Syntax.GetCharAt(7, ch)) { return PDFPARSE_ERROR_FORMAT; - if (std::isdigit(ch)) - m_FileVersion += FXSYS_toDecimalDigit(ch); - - if (m_Syntax.m_FileLen < m_Syntax.m_HeaderOffset + 9) + } + if (ch >= '0' && ch <= '9') { + m_FileVersion += ch - '0'; + } + if (m_Syntax.m_FileLen < m_Syntax.m_HeaderOffset + 9) { return PDFPARSE_ERROR_FORMAT; - + } m_Syntax.RestorePos(m_Syntax.m_FileLen - m_Syntax.m_HeaderOffset - 9); - if (!bReParse) + if (!bReParse) { m_pDocument = new CPDF_Document(this); - + } FX_BOOL bXRefRebuilt = FALSE; if (m_Syntax.SearchWord(FX_BSTRC("startxref"), TRUE, FALSE, 4096)) { FX_FILESIZE startxref_offset = m_Syntax.SavePos(); void* pResult = FXSYS_bsearch(&startxref_offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), CompareFileSize); - if (!pResult) + if (pResult == NULL) { m_SortedOffset.Add(startxref_offset); - + } m_Syntax.GetKeyword(); FX_BOOL bNumber; CFX_ByteString xrefpos_str = m_Syntax.GetNextWord(bNumber); - if (!bNumber) + if (!bNumber) { return PDFPARSE_ERROR_FORMAT; - + } m_LastXRefOffset = (FX_FILESIZE)FXSYS_atoi64(xrefpos_str); if (!LoadAllCrossRefV4(m_LastXRefOffset) && !LoadAllCrossRefV5(m_LastXRefOffset)) { - if (!RebuildCrossRef()) + if (!RebuildCrossRef()) { return PDFPARSE_ERROR_FORMAT; - + } bXRefRebuilt = TRUE; m_LastXRefOffset = 0; } } else { - if (!RebuildCrossRef()) + if (!RebuildCrossRef()) { return PDFPARSE_ERROR_FORMAT; - + } bXRefRebuilt = TRUE; } FX_DWORD dwRet = SetEncryptHandler(); - if (dwRet != PDFPARSE_ERROR_SUCCESS) + if (dwRet != PDFPARSE_ERROR_SUCCESS) { return dwRet; - + } m_pDocument->LoadDoc(); - if (!m_pDocument->GetRoot() || m_pDocument->GetPageCount() == 0) { - if (bXRefRebuilt) + if (m_pDocument->GetRoot() == NULL || m_pDocument->GetPageCount() == 0) { + if (bXRefRebuilt) { return PDFPARSE_ERROR_FORMAT; - + } ReleaseEncryptHandler(); - if (!RebuildCrossRef()) + if (!RebuildCrossRef()) { return PDFPARSE_ERROR_FORMAT; - + } dwRet = SetEncryptHandler(); - if (dwRet != PDFPARSE_ERROR_SUCCESS) + if (dwRet != PDFPARSE_ERROR_SUCCESS) { return dwRet; - + } m_pDocument->LoadDoc(); - if (!m_pDocument->GetRoot()) + if (m_pDocument->GetRoot() == NULL) { return PDFPARSE_ERROR_FORMAT; + } } FXSYS_qsort(m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), CompareFileSize); @@ -249,12 +250,13 @@ FX_DWORD CPDF_Parser::StartParse(IFX_FileRead* pFileAccess, ReleaseEncryptHandler(); RebuildCrossRef(); RootObjNum = GetRootObjNum(); - if (RootObjNum == 0) + if (RootObjNum == 0) { return PDFPARSE_ERROR_FORMAT; - + } dwRet = SetEncryptHandler(); - if (dwRet != PDFPARSE_ERROR_SUCCESS) + if (dwRet != PDFPARSE_ERROR_SUCCESS) { return dwRet; + } } if (m_pSecurityHandler && !m_pSecurityHandler->IsMetadataEncrypted()) { CPDF_Reference* pMetadata = @@ -458,8 +460,9 @@ FX_BOOL CPDF_Parser::LoadLinearizedCrossRefV4(FX_FILESIZE pos, int32_t offset = FXSYS_atoi(pEntry); if (offset == 0) { for (int32_t c = 0; c < 10; c++) { - if (!std::isdigit(pEntry[c])) + if (pEntry[c] < '0' || pEntry[c] > '9') { return FALSE; + } } } m_CrossRef.SetAtGrow(objnum, offset); @@ -558,8 +561,9 @@ bool CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos, FX_FILESIZE offset = (FX_FILESIZE)FXSYS_atoi64(pEntry); if (offset == 0) { for (int32_t c = 0; c < 10; c++) { - if (!std::isdigit(pEntry[c])) + if (pEntry[c] < '0' || pEntry[c] > '9') { return false; + } } } m_CrossRef.SetAtGrow(objnum, offset); @@ -627,32 +631,28 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { uint8_t byte = buffer[i]; switch (status) { case 0: - if (PDFCharIsWhitespace(byte)) + if (PDFCharIsWhitespace(byte)) { status = 1; - - if (std::isdigit(byte)) { + } + if (byte <= '9' && byte >= '0') { --i; status = 1; } - if (byte == '%') { inside_index = 0; status = 9; } - if (byte == '(') { status = 10; depth = 1; } - if (byte == '<') { inside_index = 1; status = 11; } - - if (byte == '\\') + if (byte == '\\') { status = 13; - + } if (byte == 't') { status = 7; inside_index = 1; @@ -661,10 +661,10 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { case 1: if (PDFCharIsWhitespace(byte)) { break; - } else if (std::isdigit(byte)) { + } else if (byte <= '9' && byte >= '0') { start_pos = pos + i; status = 2; - objnum = FXSYS_toDecimalDigit(byte); + objnum = byte - '0'; } else if (byte == 't') { status = 7; inside_index = 1; @@ -677,8 +677,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { } break; case 2: - if (std::isdigit(byte)) { - objnum = objnum * 10 + FXSYS_toDecimalDigit(byte); + if (byte <= '9' && byte >= '0') { + objnum = objnum * 10 + byte - '0'; break; } else if (PDFCharIsWhitespace(byte)) { status = 3; @@ -689,10 +689,10 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { } break; case 3: - if (std::isdigit(byte)) { + if (byte <= '9' && byte >= '0') { start_pos1 = pos + i; status = 4; - gennum = FXSYS_toDecimalDigit(byte); + gennum = byte - '0'; } else if (PDFCharIsWhitespace(byte)) { break; } else if (byte == 't') { @@ -704,8 +704,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { } break; case 4: - if (std::isdigit(byte)) { - gennum = gennum * 10 + FXSYS_toDecimalDigit(byte); + if (byte <= '9' && byte >= '0') { + gennum = gennum * 10 + byte - '0'; break; } else if (PDFCharIsWhitespace(byte)) { status = 5; @@ -720,9 +720,9 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { inside_index = 1; } else if (PDFCharIsWhitespace(byte)) { break; - } else if (std::isdigit(byte)) { + } else if (byte <= '9' && byte >= '0') { objnum = gennum; - gennum = FXSYS_toDecimalDigit(byte); + gennum = byte - '0'; start_pos = start_pos1; start_pos1 = pos + i; status = 4; @@ -1863,7 +1863,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { break; case 1: if (ch >= '0' && ch <= '7') { - iEscCode = FXSYS_toDecimalDigit(ch); + iEscCode = ch - '0'; status = 2; break; } @@ -1888,7 +1888,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { break; case 2: if (ch >= '0' && ch <= '7') { - iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch); + iEscCode = iEscCode * 8 + ch - '0'; status = 3; } else { buf.AppendChar(iEscCode); @@ -1898,7 +1898,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { break; case 3: if (ch >= '0' && ch <= '7') { - iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch); + iEscCode = iEscCode * 8 + ch - '0'; buf.AppendChar(iEscCode); status = 0; } else { @@ -1923,33 +1923,48 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { } CFX_ByteString CPDF_SyntaxParser::ReadHexString() { uint8_t ch; - if (!GetNextChar(ch)) + if (!GetNextChar(ch)) { return CFX_ByteString(); - + } CFX_BinaryBuf buf; - bool bFirst = true; + FX_BOOL bFirst = TRUE; uint8_t code = 0; while (1) { - if (ch == '>') + if (ch == '>') { break; - - if (std::isxdigit(ch)) { - int val = FXSYS_toHexDigit(ch); + } + if (ch >= '0' && ch <= '9') { + if (bFirst) { + code = (ch - '0') * 16; + } else { + code += ch - '0'; + buf.AppendByte((uint8_t)code); + } + bFirst = !bFirst; + } else if (ch >= 'A' && ch <= 'F') { if (bFirst) { - code = val * 16; + code = (ch - 'A' + 10) * 16; } else { - code += val; + code += ch - 'A' + 10; + buf.AppendByte((uint8_t)code); + } + bFirst = !bFirst; + } else if (ch >= 'a' && ch <= 'f') { + if (bFirst) { + code = (ch - 'a' + 10) * 16; + } else { + code += ch - 'a' + 10; buf.AppendByte((uint8_t)code); } bFirst = !bFirst; } - - if (!GetNextChar(ch)) + if (!GetNextChar(ch)) { break; + } } - if (!bFirst) + if (!bFirst) { buf.AppendByte((uint8_t)code); - + } return buf.GetByteString(); } void CPDF_SyntaxParser::ToNextLine() { diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp index 202f02ac77..335101e85b 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp @@ -5,7 +5,6 @@ // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "../../../include/fpdfapi/fpdf_parser.h" -#include "../../../include/fxcrt/fx_ext.h" // Indexed by 8-bit character code, contains either: // 'W' - for whitespace: NUL, TAB, CR, LF, FF, 0x80, 0xff @@ -280,7 +279,18 @@ FX_BOOL CPDF_SimpleParser::FindTagParam(const CFX_ByteStringC& token, } return FALSE; } - +static int _hex2dec(char ch) { + if (ch >= '0' && ch <= '9') { + return ch - '0'; + } + if (ch >= 'a' && ch <= 'f') { + return ch - 'a' + 10; + } + if (ch >= 'A' && ch <= 'F') { + return ch - 'A' + 10; + } + return 0; +} CFX_ByteString PDF_NameDecode(const CFX_ByteStringC& bstr) { int size = bstr.GetLength(); const FX_CHAR* pSrc = bstr.GetCStr(); @@ -292,8 +302,7 @@ CFX_ByteString PDF_NameDecode(const CFX_ByteStringC& bstr) { FX_CHAR* pDest = pDestStart; for (int i = 0; i < size; i++) { if (pSrc[i] == '#' && i < size - 2) { - *pDest++ = - FXSYS_toHexDigit(pSrc[i + 1]) * 16 + FXSYS_toHexDigit(pSrc[i + 2]); + *pDest++ = _hex2dec(pSrc[i + 1]) * 16 + _hex2dec(pSrc[i + 2]); i += 2; } else { *pDest++ = pSrc[i]; |