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-rw-r--r--core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp212
1 files changed, 125 insertions, 87 deletions
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp
index 5460615042..a8ae866f81 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp
@@ -4,11 +4,12 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-#include "pageint.h"
+#include "core/src/fpdfapi/fpdf_page/pageint.h"
#include <limits.h>
#include <memory>
+#include <utility>
#include <vector>
#include "core/include/fpdfapi/fpdf_module.h"
@@ -16,8 +17,9 @@
#include "core/include/fxcrt/fx_safe_types.h"
#include "third_party/base/numerics/safe_conversions_impl.h"
-class CPDF_PSEngine;
-typedef enum {
+namespace {
+
+enum PDF_PSOP {
PSOP_ADD,
PSOP_SUB,
PSOP_MUL,
@@ -62,19 +64,62 @@ typedef enum {
PSOP_ROLL,
PSOP_PROC,
PSOP_CONST
-} PDF_PSOP;
+};
+
+class CPDF_PSEngine;
+class CPDF_PSProc;
+
+class CPDF_PSOP {
+ public:
+ explicit CPDF_PSOP(PDF_PSOP op) : m_op(op), m_value(0) {
+ ASSERT(m_op != PSOP_CONST);
+ ASSERT(m_op != PSOP_PROC);
+ }
+ explicit CPDF_PSOP(FX_FLOAT value) : m_op(PSOP_CONST), m_value(value) {}
+ explicit CPDF_PSOP(std::unique_ptr<CPDF_PSProc> proc)
+ : m_op(PSOP_PROC), m_value(0), m_proc(std::move(proc)) {}
+
+ FX_FLOAT GetFloatValue() const {
+ if (m_op == PSOP_CONST)
+ return m_value;
+
+ ASSERT(false);
+ return 0;
+ }
+ CPDF_PSProc* GetProc() const {
+ if (m_op == PSOP_PROC)
+ return m_proc.get();
+ ASSERT(false);
+ return nullptr;
+ }
+
+ PDF_PSOP GetOp() const { return m_op; }
+
+ private:
+ const PDF_PSOP m_op;
+ const FX_FLOAT m_value;
+ std::unique_ptr<CPDF_PSProc> m_proc;
+};
+
class CPDF_PSProc {
public:
- ~CPDF_PSProc();
- FX_BOOL Parse(CPDF_SimpleParser& parser);
+ CPDF_PSProc() {}
+ ~CPDF_PSProc() {}
+
+ FX_BOOL Parse(CPDF_SimpleParser* parser);
FX_BOOL Execute(CPDF_PSEngine* pEngine);
- std::vector<void*> m_Operators;
+
+ private:
+ std::vector<std::unique_ptr<CPDF_PSOP>> m_Operators;
};
-#define PSENGINE_STACKSIZE 100
+
+const size_t PSENGINE_STACKSIZE = 100;
+
class CPDF_PSEngine {
public:
CPDF_PSEngine();
~CPDF_PSEngine();
+
FX_BOOL Parse(const FX_CHAR* string, int size);
FX_BOOL Execute() { return m_MainProc.Execute(this); }
FX_BOOL DoOperator(PDF_PSOP op);
@@ -82,61 +127,51 @@ class CPDF_PSEngine {
void Push(FX_FLOAT value);
void Push(int value) { Push((FX_FLOAT)value); }
FX_FLOAT Pop();
- int GetStackSize() { return m_StackCount; }
+ int GetStackSize() const { return m_StackCount; }
private:
FX_FLOAT m_Stack[PSENGINE_STACKSIZE];
int m_StackCount;
CPDF_PSProc m_MainProc;
};
-CPDF_PSProc::~CPDF_PSProc() {
- for (size_t i = 0; i < m_Operators.size(); i++) {
- if (m_Operators[i] == (void*)PSOP_PROC) {
- delete (CPDF_PSProc*)m_Operators[i + 1];
- i++;
- } else if (m_Operators[i] == (void*)PSOP_CONST) {
- FX_Free((FX_FLOAT*)m_Operators[i + 1]);
- i++;
- }
- }
-}
+
FX_BOOL CPDF_PSProc::Execute(CPDF_PSEngine* pEngine) {
- for (size_t i = 0; i < m_Operators.size(); i++) {
- PDF_PSOP op = (PDF_PSOP)(uintptr_t)m_Operators[i];
- if (op == PSOP_PROC) {
- i++;
- } else if (op == PSOP_CONST) {
- pEngine->Push(*(FX_FLOAT*)m_Operators[i + 1]);
- i++;
- } else if (op == PSOP_IF) {
- if (i < 2 || m_Operators[i - 2] != (void*)PSOP_PROC) {
+ for (size_t i = 0; i < m_Operators.size(); ++i) {
+ const PDF_PSOP op = m_Operators[i]->GetOp();
+ if (op == PSOP_PROC)
+ continue;
+
+ if (op == PSOP_CONST) {
+ pEngine->Push(m_Operators[i]->GetFloatValue());
+ continue;
+ }
+
+ if (op == PSOP_IF) {
+ if (i == 0 || m_Operators[i - 1]->GetOp() != PSOP_PROC)
return FALSE;
- }
- if ((int)pEngine->Pop()) {
- ((CPDF_PSProc*)m_Operators[i - 1])->Execute(pEngine);
- }
+
+ if (static_cast<int>(pEngine->Pop()))
+ m_Operators[i - 1]->GetProc()->Execute(pEngine);
} else if (op == PSOP_IFELSE) {
- if (i < 4 || m_Operators[i - 2] != (void*)PSOP_PROC ||
- m_Operators[i - 4] != (void*)PSOP_PROC) {
+ if (i < 2 || m_Operators[i - 1]->GetOp() != PSOP_PROC ||
+ m_Operators[i - 2]->GetOp() != PSOP_PROC) {
return FALSE;
}
- if ((int)pEngine->Pop()) {
- ((CPDF_PSProc*)m_Operators[i - 3])->Execute(pEngine);
- } else {
- ((CPDF_PSProc*)m_Operators[i - 1])->Execute(pEngine);
- }
+ size_t offset = static_cast<int>(pEngine->Pop()) ? 2 : 1;
+ m_Operators[i - offset]->GetProc()->Execute(pEngine);
} else {
pEngine->DoOperator(op);
}
}
return TRUE;
}
+
CPDF_PSEngine::CPDF_PSEngine() {
m_StackCount = 0;
}
CPDF_PSEngine::~CPDF_PSEngine() {}
void CPDF_PSEngine::Push(FX_FLOAT v) {
- if (m_StackCount == 100) {
+ if (m_StackCount == PSENGINE_STACKSIZE) {
return;
}
m_Stack[m_StackCount++] = v;
@@ -147,42 +182,42 @@ FX_FLOAT CPDF_PSEngine::Pop() {
}
return m_Stack[--m_StackCount];
}
-const struct _PDF_PSOpName {
+const struct PDF_PSOpName {
const FX_CHAR* name;
PDF_PSOP op;
-} _PDF_PSOpNames[] = {{"add", PSOP_ADD}, {"sub", PSOP_SUB},
- {"mul", PSOP_MUL}, {"div", PSOP_DIV},
- {"idiv", PSOP_IDIV}, {"mod", PSOP_MOD},
- {"neg", PSOP_NEG}, {"abs", PSOP_ABS},
- {"ceiling", PSOP_CEILING}, {"floor", PSOP_FLOOR},
- {"round", PSOP_ROUND}, {"truncate", PSOP_TRUNCATE},
- {"sqrt", PSOP_SQRT}, {"sin", PSOP_SIN},
- {"cos", PSOP_COS}, {"atan", PSOP_ATAN},
- {"exp", PSOP_EXP}, {"ln", PSOP_LN},
- {"log", PSOP_LOG}, {"cvi", PSOP_CVI},
- {"cvr", PSOP_CVR}, {"eq", PSOP_EQ},
- {"ne", PSOP_NE}, {"gt", PSOP_GT},
- {"ge", PSOP_GE}, {"lt", PSOP_LT},
- {"le", PSOP_LE}, {"and", PSOP_AND},
- {"or", PSOP_OR}, {"xor", PSOP_XOR},
- {"not", PSOP_NOT}, {"bitshift", PSOP_BITSHIFT},
- {"true", PSOP_TRUE}, {"false", PSOP_FALSE},
- {"if", PSOP_IF}, {"ifelse", PSOP_IFELSE},
- {"pop", PSOP_POP}, {"exch", PSOP_EXCH},
- {"dup", PSOP_DUP}, {"copy", PSOP_COPY},
- {"index", PSOP_INDEX}, {"roll", PSOP_ROLL},
- {NULL, PSOP_PROC}};
+} PDF_PSOpNames[] = {{"add", PSOP_ADD}, {"sub", PSOP_SUB},
+ {"mul", PSOP_MUL}, {"div", PSOP_DIV},
+ {"idiv", PSOP_IDIV}, {"mod", PSOP_MOD},
+ {"neg", PSOP_NEG}, {"abs", PSOP_ABS},
+ {"ceiling", PSOP_CEILING}, {"floor", PSOP_FLOOR},
+ {"round", PSOP_ROUND}, {"truncate", PSOP_TRUNCATE},
+ {"sqrt", PSOP_SQRT}, {"sin", PSOP_SIN},
+ {"cos", PSOP_COS}, {"atan", PSOP_ATAN},
+ {"exp", PSOP_EXP}, {"ln", PSOP_LN},
+ {"log", PSOP_LOG}, {"cvi", PSOP_CVI},
+ {"cvr", PSOP_CVR}, {"eq", PSOP_EQ},
+ {"ne", PSOP_NE}, {"gt", PSOP_GT},
+ {"ge", PSOP_GE}, {"lt", PSOP_LT},
+ {"le", PSOP_LE}, {"and", PSOP_AND},
+ {"or", PSOP_OR}, {"xor", PSOP_XOR},
+ {"not", PSOP_NOT}, {"bitshift", PSOP_BITSHIFT},
+ {"true", PSOP_TRUE}, {"false", PSOP_FALSE},
+ {"if", PSOP_IF}, {"ifelse", PSOP_IFELSE},
+ {"pop", PSOP_POP}, {"exch", PSOP_EXCH},
+ {"dup", PSOP_DUP}, {"copy", PSOP_COPY},
+ {"index", PSOP_INDEX}, {"roll", PSOP_ROLL}};
+
FX_BOOL CPDF_PSEngine::Parse(const FX_CHAR* string, int size) {
CPDF_SimpleParser parser((uint8_t*)string, size);
CFX_ByteStringC word = parser.GetWord();
if (word != "{") {
return FALSE;
}
- return m_MainProc.Parse(parser);
+ return m_MainProc.Parse(&parser);
}
-FX_BOOL CPDF_PSProc::Parse(CPDF_SimpleParser& parser) {
+FX_BOOL CPDF_PSProc::Parse(CPDF_SimpleParser* parser) {
while (1) {
- CFX_ByteStringC word = parser.GetWord();
+ CFX_ByteStringC word = parser->GetWord();
if (word.IsEmpty()) {
return FALSE;
}
@@ -190,31 +225,30 @@ FX_BOOL CPDF_PSProc::Parse(CPDF_SimpleParser& parser) {
return TRUE;
}
if (word == "{") {
- CPDF_PSProc* pProc = new CPDF_PSProc;
- m_Operators.push_back((void*)PSOP_PROC);
- m_Operators.push_back(pProc);
- if (!pProc->Parse(parser)) {
+ std::unique_ptr<CPDF_PSProc> proc(new CPDF_PSProc);
+ std::unique_ptr<CPDF_PSOP> op(new CPDF_PSOP(std::move(proc)));
+ m_Operators.push_back(std::move(op));
+ if (!m_Operators.back()->GetProc()->Parse(parser)) {
return FALSE;
}
} else {
- int i = 0;
- while (_PDF_PSOpNames[i].name) {
- if (word == CFX_ByteStringC(_PDF_PSOpNames[i].name)) {
- m_Operators.push_back((void*)_PDF_PSOpNames[i].op);
+ bool found = false;
+ for (const PDF_PSOpName& op_name : PDF_PSOpNames) {
+ if (word == CFX_ByteStringC(op_name.name)) {
+ std::unique_ptr<CPDF_PSOP> op(new CPDF_PSOP(op_name.op));
+ m_Operators.push_back(std::move(op));
+ found = true;
break;
}
- i++;
}
- if (!_PDF_PSOpNames[i].name) {
- FX_FLOAT* pd = FX_Alloc(FX_FLOAT, 1);
- *pd = FX_atof(word);
- m_Operators.push_back((void*)PSOP_CONST);
- m_Operators.push_back(pd);
+ if (!found) {
+ std::unique_ptr<CPDF_PSOP> op(new CPDF_PSOP(FX_atof(word)));
+ m_Operators.push_back(std::move(op));
}
}
}
}
-#define PI 3.1415926535897932384626433832795f
+
FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) {
int i1, i2;
FX_FLOAT d1, d2;
@@ -279,16 +313,16 @@ FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) {
break;
case PSOP_SIN:
d1 = Pop();
- Push((FX_FLOAT)FXSYS_sin(d1 * PI / 180.0f));
+ Push((FX_FLOAT)FXSYS_sin(d1 * FX_PI / 180.0f));
break;
case PSOP_COS:
d1 = Pop();
- Push((FX_FLOAT)FXSYS_cos(d1 * PI / 180.0f));
+ Push((FX_FLOAT)FXSYS_cos(d1 * FX_PI / 180.0f));
break;
case PSOP_ATAN:
d2 = Pop();
d1 = Pop();
- d1 = (FX_FLOAT)(FXSYS_atan2(d1, d2) * 180.0 / PI);
+ d1 = (FX_FLOAT)(FXSYS_atan2(d1, d2) * 180.0 / FX_PI);
if (d1 < 0) {
d1 += 360;
}
@@ -421,7 +455,7 @@ FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) {
if (n < 0 || n > m_StackCount) {
break;
}
- if (j < 0)
+ if (j < 0) {
for (int i = 0; i < -j; i++) {
FX_FLOAT first = m_Stack[m_StackCount - n];
for (int ii = 0; ii < n - 1; ii++) {
@@ -429,7 +463,7 @@ FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) {
}
m_Stack[m_StackCount - 1] = first;
}
- else
+ } else {
for (int i = 0; i < j; i++) {
FX_FLOAT last = m_Stack[m_StackCount - 1];
int ii;
@@ -438,6 +472,7 @@ FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) {
}
m_Stack[m_StackCount - ii - 1] = last;
}
+ }
break;
}
default:
@@ -820,6 +855,9 @@ FX_BOOL CPDF_StitchFunc::v_Call(FX_FLOAT* inputs, FX_FLOAT* outputs) const {
m_pSubFunctions[i]->Call(&input, kRequiredNumInputs, outputs, nresults);
return TRUE;
}
+
+} // namespace
+
CPDF_Function* CPDF_Function::Load(CPDF_Object* pFuncObj) {
if (!pFuncObj) {
return NULL;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 17:59:26 +0000