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Unified Diff: core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp

Issue 1433513002: Revert "Revert "Revert "Revert "Cleanup some numeric code."""" (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: Created 5 years, 1 month ago
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« core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp ('K') | « core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp ('k') | core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp » ('j') | core/src/fpdftext/fpdf_text.cpp » ('J')
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Index: core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index f5ada7c6eb6c3c3d0712cb45dacbe7f4a48d79c2..949c3a4f6f54481d72caeecc6d5574b4da115d86 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -13,6 +13,7 @@
#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"
@@ -163,85 +164,83 @@ 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 (ch >= '0' && ch <= '9') {
- m_FileVersion = (ch - '0') * 10;
- }
- if (!m_Syntax.GetCharAt(7, ch)) {
+ if (std::isdigit(ch))
+ m_FileVersion = FXSYS_toDecimalDigit(ch) * 10;
+
+ if (!m_Syntax.GetCharAt(7, ch))
return PDFPARSE_ERROR_FORMAT;
- }
- if (ch >= '0' && ch <= '9') {
- m_FileVersion += ch - '0';
- }
- if (m_Syntax.m_FileLen < m_Syntax.m_HeaderOffset + 9) {
+ if (std::isdigit(ch))
+ m_FileVersion += FXSYS_toDecimalDigit(ch);
+
+ 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 == NULL) {
+ if (!pResult)
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() == NULL || m_pDocument->GetPageCount() == 0) {
- if (bXRefRebuilt) {
+ if (!m_pDocument->GetRoot() || 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() == NULL) {
+ if (!m_pDocument->GetRoot())
return PDFPARSE_ERROR_FORMAT;
- }
}
FXSYS_qsort(m_SortedOffset.GetData(), m_SortedOffset.GetSize(),
sizeof(FX_FILESIZE), CompareFileSize);
@@ -250,13 +249,12 @@ 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 =
@@ -460,9 +458,8 @@ 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 (pEntry[c] < '0' || pEntry[c] > '9') {
+ if (!std::isdigit(pEntry[c]))
return FALSE;
- }
}
}
m_CrossRef.SetAtGrow(objnum, offset);
@@ -561,9 +558,8 @@ 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 (pEntry[c] < '0' || pEntry[c] > '9') {
+ if (!std::isdigit(pEntry[c]))
return false;
- }
}
}
m_CrossRef.SetAtGrow(objnum, offset);
@@ -631,28 +627,32 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
uint8_t byte = buffer[i];
switch (status) {
case 0:
- if (PDFCharIsWhitespace(byte)) {
+ if (PDFCharIsWhitespace(byte))
status = 1;
- }
- if (byte <= '9' && byte >= '0') {
+
+ if (std::isdigit(byte)) {
--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 (byte <= '9' && byte >= '0') {
+ } else if (std::isdigit(byte)) {
start_pos = pos + i;
status = 2;
- objnum = byte - '0';
+ objnum = FXSYS_toDecimalDigit(byte);
} else if (byte == 't') {
status = 7;
inside_index = 1;
@@ -677,8 +677,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
}
break;
case 2:
- if (byte <= '9' && byte >= '0') {
- objnum = objnum * 10 + byte - '0';
+ if (std::isdigit(byte)) {
+ objnum = objnum * 10 + FXSYS_toDecimalDigit(byte);
break;
} else if (PDFCharIsWhitespace(byte)) {
status = 3;
@@ -689,10 +689,10 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
}
break;
case 3:
- if (byte <= '9' && byte >= '0') {
+ if (std::isdigit(byte)) {
start_pos1 = pos + i;
status = 4;
- gennum = byte - '0';
+ gennum = FXSYS_toDecimalDigit(byte);
} else if (PDFCharIsWhitespace(byte)) {
break;
} else if (byte == 't') {
@@ -704,8 +704,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
}
break;
case 4:
- if (byte <= '9' && byte >= '0') {
- gennum = gennum * 10 + byte - '0';
+ if (std::isdigit(byte)) {
+ gennum = gennum * 10 + FXSYS_toDecimalDigit(byte);
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 (byte <= '9' && byte >= '0') {
+ } else if (std::isdigit(byte)) {
objnum = gennum;
- gennum = byte - '0';
+ gennum = FXSYS_toDecimalDigit(byte);
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 = ch - '0';
+ iEscCode = FXSYS_toDecimalDigit(ch);
status = 2;
break;
}
@@ -1888,7 +1888,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() {
break;
case 2:
if (ch >= '0' && ch <= '7') {
- iEscCode = iEscCode * 8 + ch - '0';
+ iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch);
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 + ch - '0';
+ iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch);
buf.AppendChar(iEscCode);
status = 0;
} else {
@@ -1923,48 +1923,33 @@ 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;
- FX_BOOL bFirst = TRUE;
+ bool bFirst = true;
uint8_t code = 0;
while (1) {
- if (ch == '>') {
+ if (ch == '>')
break;
- }
- 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 = (ch - 'A' + 10) * 16;
- } else {
- code += ch - 'A' + 10;
- buf.AppendByte((uint8_t)code);
- }
- bFirst = !bFirst;
- } else if (ch >= 'a' && ch <= 'f') {
+
+ if (std::isxdigit(ch)) {
+ int val = FXSYS_toHexDigit(ch);
if (bFirst) {
- code = (ch - 'a' + 10) * 16;
+ code = val * 16;
} else {
- code += ch - 'a' + 10;
+ code += val;
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() {
« core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp ('K') | « core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp ('k') | core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp » ('j') | core/src/fpdftext/fpdf_text.cpp » ('J')

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