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-rw-r--r--core/fpdfapi/parser/cpdf_simple_parser.cpp107
1 files changed, 61 insertions, 46 deletions
diff --git a/core/fpdfapi/parser/cpdf_simple_parser.cpp b/core/fpdfapi/parser/cpdf_simple_parser.cpp
index b49f8423c3..9e3bf54022 100644
--- a/core/fpdfapi/parser/cpdf_simple_parser.cpp
+++ b/core/fpdfapi/parser/cpdf_simple_parser.cpp
@@ -6,6 +6,8 @@
#include "core/fpdfapi/parser/cpdf_simple_parser.h"
+#include <vector>
+
#include "core/fpdfapi/parser/fpdf_parser_utility.h"
CPDF_SimpleParser::CPDF_SimpleParser(const uint8_t* pData, uint32_t dwSize)
@@ -18,9 +20,12 @@ std::pair<const uint8_t*, uint32_t> CPDF_SimpleParser::ParseWord() {
const uint8_t* pStart = nullptr;
uint8_t dwSize = 0;
uint8_t ch;
+
+ // Skip whitespace and comment lines.
while (1) {
if (m_dwSize <= m_dwCurPos)
return std::make_pair(pStart, dwSize);
+
ch = m_pData[m_dwCurPos++];
while (PDFCharIsWhitespace(ch)) {
if (m_dwSize <= m_dwCurPos)
@@ -34,6 +39,7 @@ std::pair<const uint8_t*, uint32_t> CPDF_SimpleParser::ParseWord() {
while (1) {
if (m_dwSize <= m_dwCurPos)
return std::make_pair(pStart, dwSize);
+
ch = m_pData[m_dwCurPos++];
if (PDFCharIsLineEnding(ch))
break;
@@ -43,36 +49,41 @@ std::pair<const uint8_t*, uint32_t> CPDF_SimpleParser::ParseWord() {
uint32_t start_pos = m_dwCurPos - 1;
pStart = m_pData + start_pos;
if (PDFCharIsDelimiter(ch)) {
+ // Find names
if (ch == '/') {
while (1) {
if (m_dwSize <= m_dwCurPos)
- return std::make_pair(pStart, dwSize);
+ break;
+
ch = m_pData[m_dwCurPos++];
if (!PDFCharIsOther(ch) && !PDFCharIsNumeric(ch)) {
m_dwCurPos--;
dwSize = m_dwCurPos - start_pos;
- return std::make_pair(pStart, dwSize);
+ break;
}
}
- } else {
- dwSize = 1;
- if (ch == '<') {
- if (m_dwSize <= m_dwCurPos)
- return std::make_pair(pStart, dwSize);
- ch = m_pData[m_dwCurPos++];
- if (ch == '<')
- dwSize = 2;
- else
- m_dwCurPos--;
- } else if (ch == '>') {
- if (m_dwSize <= m_dwCurPos)
- return std::make_pair(pStart, dwSize);
- ch = m_pData[m_dwCurPos++];
- if (ch == '>')
- dwSize = 2;
- else
- m_dwCurPos--;
- }
+ return std::make_pair(pStart, dwSize);
+ }
+
+ dwSize = 1;
+ if (ch == '<') {
+ if (m_dwSize <= m_dwCurPos)
+ return std::make_pair(pStart, dwSize);
+
+ ch = m_pData[m_dwCurPos++];
+ if (ch == '<')
+ dwSize = 2;
+ else
+ m_dwCurPos--;
+ } else if (ch == '>') {
+ if (m_dwSize <= m_dwCurPos)
+ return std::make_pair(pStart, dwSize);
+
+ ch = m_pData[m_dwCurPos++];
+ if (ch == '>')
+ dwSize = 2;
+ else
+ m_dwCurPos--;
}
return std::make_pair(pStart, dwSize);
}
@@ -96,41 +107,46 @@ ByteStringView CPDF_SimpleParser::GetWord() {
const uint8_t* pStart;
uint32_t dwSize;
std::tie(pStart, dwSize) = ParseWord();
- if (dwSize == 1 && pStart[0] == '<') {
- while (m_dwCurPos < m_dwSize && m_pData[m_dwCurPos] != '>') {
+
+ if (dwSize != 1)
+ return ByteStringView(pStart, dwSize);
+
+ if (pStart[0] == '<') {
+ while (m_dwCurPos < m_dwSize && m_pData[m_dwCurPos] != '>')
m_dwCurPos++;
- }
- if (m_dwCurPos < m_dwSize) {
+
+ if (m_dwCurPos < m_dwSize)
m_dwCurPos++;
- }
+
return ByteStringView(pStart,
static_cast<size_t>(m_dwCurPos - (pStart - m_pData)));
}
- if (dwSize == 1 && pStart[0] == '(') {
+
+ if (pStart[0] == '(') {
int level = 1;
while (m_dwCurPos < m_dwSize) {
if (m_pData[m_dwCurPos] == ')') {
level--;
- if (level == 0) {
+ if (level == 0)
break;
- }
}
+
if (m_pData[m_dwCurPos] == '\\') {
- if (m_dwSize <= m_dwCurPos) {
+ if (m_dwSize <= m_dwCurPos)
break;
- }
+
m_dwCurPos++;
} else if (m_pData[m_dwCurPos] == '(') {
level++;
}
- if (m_dwSize <= m_dwCurPos) {
+ if (m_dwSize <= m_dwCurPos)
break;
- }
+
m_dwCurPos++;
}
- if (m_dwCurPos < m_dwSize) {
+ if (m_dwCurPos < m_dwSize)
m_dwCurPos++;
- }
+
return ByteStringView(pStart,
static_cast<size_t>(m_dwCurPos - (pStart - m_pData)));
}
@@ -140,30 +156,29 @@ ByteStringView CPDF_SimpleParser::GetWord() {
bool CPDF_SimpleParser::FindTagParamFromStart(const ByteStringView& token,
int nParams) {
nParams++;
- uint32_t* pBuf = FX_Alloc(uint32_t, nParams);
+
+ std::vector<uint32_t> pBuf(nParams);
int buf_index = 0;
int buf_count = 0;
m_dwCurPos = 0;
while (1) {
pBuf[buf_index++] = m_dwCurPos;
- if (buf_index == nParams) {
+ if (buf_index == nParams)
buf_index = 0;
- }
+
buf_count++;
- if (buf_count > nParams) {
+ if (buf_count > nParams)
buf_count = nParams;
- }
+
ByteStringView word = GetWord();
- if (word.IsEmpty()) {
- FX_Free(pBuf);
+ if (word.IsEmpty())
return false;
- }
+
if (word == token) {
- if (buf_count < nParams) {
+ if (buf_count < nParams)
continue;
- }
+
m_dwCurPos = pBuf[buf_index];
- FX_Free(pBuf);
return true;
}
}