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path: root/xfa/fxfa/fm2js/cxfa_fmparse.cpp
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Diffstat (limited to 'xfa/fxfa/fm2js/cxfa_fmparse.cpp')
-rw-r--r--xfa/fxfa/fm2js/cxfa_fmparse.cpp1147
1 files changed, 670 insertions, 477 deletions
diff --git a/xfa/fxfa/fm2js/cxfa_fmparse.cpp b/xfa/fxfa/fm2js/cxfa_fmparse.cpp
index 723a735936..8e163a40d0 100644
--- a/xfa/fxfa/fm2js/cxfa_fmparse.cpp
+++ b/xfa/fxfa/fm2js/cxfa_fmparse.cpp
@@ -18,18 +18,14 @@ const int kMaxAssignmentChainLength = 12;
} // namespace
-CXFA_FMParse::CXFA_FMParse(const CFX_WideStringC& wsFormcalc)
- : m_pToken(nullptr), m_ParserError(false) {
+CXFA_FMParse::CXFA_FMParse(const CFX_WideStringC& wsFormcalc) : m_error(false) {
m_lexer = pdfium::MakeUnique<CXFA_FMLexer>(wsFormcalc);
+ m_token = m_lexer->NextToken();
}
CXFA_FMParse::~CXFA_FMParse() {}
std::unique_ptr<CXFA_FMFunctionDefinition> CXFA_FMParse::Parse() {
- NextToken();
- if (HasError())
- return nullptr;
-
auto expressions = ParseTopExpression();
if (HasError())
return nullptr;
@@ -39,93 +35,122 @@ std::unique_ptr<CXFA_FMFunctionDefinition> CXFA_FMParse::Parse() {
1, true, L"", std::move(arguments), std::move(expressions));
}
-void CXFA_FMParse::NextToken() {
- m_pToken = m_lexer->NextToken();
- while (m_pToken->m_type == TOKreserver) {
- if (HasError())
- break;
- m_pToken = m_lexer->NextToken();
- }
+bool CXFA_FMParse::NextToken() {
+ if (HasError())
+ return false;
+ m_token = m_lexer->NextToken();
+ while (!HasError() && m_token->m_type == TOKreserver)
+ m_token = m_lexer->NextToken();
+ return !HasError();
}
-void CXFA_FMParse::Check(XFA_FM_TOKEN op) {
- if (m_pToken->m_type != op)
- m_ParserError = true;
- NextToken();
+bool CXFA_FMParse::CheckThenNext(XFA_FM_TOKEN op) {
+ if (HasError())
+ return false;
+
+ if (m_token->m_type != op) {
+ m_error = true;
+ return false;
+ }
+ return NextToken();
}
std::vector<std::unique_ptr<CXFA_FMExpression>>
CXFA_FMParse::ParseTopExpression() {
std::unique_ptr<CXFA_FMExpression> expr;
std::vector<std::unique_ptr<CXFA_FMExpression>> expressions;
- while (1) {
- if (m_pToken->m_type == TOKeof || m_pToken->m_type == TOKendfunc ||
- m_pToken->m_type == TOKendif || m_pToken->m_type == TOKelseif ||
- m_pToken->m_type == TOKelse || m_pToken->m_type == TOKreserver) {
+ if (HasError())
+ return expressions;
+
+ while (!HasError()) {
+ if (m_token->m_type == TOKeof || m_token->m_type == TOKendfunc ||
+ m_token->m_type == TOKendif || m_token->m_type == TOKelseif ||
+ m_token->m_type == TOKelse || m_token->m_type == TOKreserver) {
return expressions;
}
- expr = m_pToken->m_type == TOKfunc ? ParseFunction() : ParseExpression();
- if (!expr)
+ expr = m_token->m_type == TOKfunc ? ParseFunction() : ParseExpression();
+ if (!expr) {
+ m_error = true;
+ expressions.clear();
break;
+ }
expressions.push_back(std::move(expr));
}
+ if (HasError())
+ expressions.clear();
return expressions;
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseFunction() {
+ if (HasError())
+ return nullptr;
+
CFX_WideStringC ident;
std::vector<CFX_WideStringC> arguments;
std::vector<std::unique_ptr<CXFA_FMExpression>> expressions;
- uint32_t line = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type != TOKidentifier) {
- m_ParserError = true;
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
} else {
- ident = m_pToken->m_string;
- NextToken();
+ ident = m_token->m_string;
+ if (!NextToken())
+ return nullptr;
}
- Check(TOKlparen);
- if (m_pToken->m_type == TOKrparen) {
- NextToken();
+ if (!CheckThenNext(TOKlparen))
+ return nullptr;
+ if (m_token->m_type == TOKrparen) {
+ if (!NextToken())
+ return nullptr;
} else {
while (1) {
- if (m_pToken->m_type == TOKidentifier) {
- arguments.push_back(m_pToken->m_string);
- NextToken();
- if (m_pToken->m_type == TOKcomma) {
- NextToken();
- continue;
- }
- if (m_pToken->m_type == TOKrparen)
- NextToken();
- else
- Check(TOKrparen);
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
+ }
+ arguments.push_back(m_token->m_string);
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type == TOKcomma) {
+ if (!NextToken())
+ return nullptr;
+ continue;
+ }
+ if (m_token->m_type == TOKrparen) {
+ if (!NextToken())
+ return nullptr;
} else {
- m_ParserError = true;
- NextToken();
+ if (!CheckThenNext(TOKrparen))
+ return nullptr;
}
break;
}
}
- Check(TOKdo);
- if (m_pToken->m_type == TOKendfunc) {
- NextToken();
+ if (!CheckThenNext(TOKdo))
+ return nullptr;
+ if (m_token->m_type == TOKendfunc) {
+ if (!NextToken())
+ return nullptr;
} else {
expressions = ParseTopExpression();
- Check(TOKendfunc);
+ if (!expressions.size() || !CheckThenNext(TOKendfunc))
+ return nullptr;
}
- if (HasError())
- return nullptr;
return pdfium::MakeUnique<CXFA_FMFunctionDefinition>(
line, false, ident, std::move(arguments), std::move(expressions));
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseExpression() {
+ if (HasError())
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> expr;
- uint32_t line = m_pToken->m_line_num;
- switch (m_pToken->m_type) {
+ uint32_t line = m_token->m_line_num;
+ switch (m_token->m_type) {
case TOKvar:
expr = ParseVarExpression();
break;
@@ -156,86 +181,111 @@ std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseExpression() {
break;
case TOKbreak:
expr = pdfium::MakeUnique<CXFA_FMBreakExpression>(line);
- NextToken();
+ if (!NextToken())
+ return nullptr;
break;
case TOKcontinue:
expr = pdfium::MakeUnique<CXFA_FMContinueExpression>(line);
- NextToken();
+ if (!NextToken())
+ return nullptr;
break;
default:
- m_ParserError = true;
- NextToken();
- break;
+ m_error = true;
+ return nullptr;
}
return expr;
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseVarExpression() {
+ if (HasError())
+ return nullptr;
+
CFX_WideStringC ident;
- uint32_t line = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type != TOKidentifier) {
- m_ParserError = true;
- } else {
- ident = m_pToken->m_string;
- NextToken();
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
}
+
+ ident = m_token->m_string;
+ if (!NextToken())
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> expr;
- if (m_pToken->m_type == TOKassign) {
- NextToken();
+ if (m_token->m_type == TOKassign) {
+ if (!NextToken())
+ return nullptr;
+
expr = ParseExpExpression();
+ if (!expr)
+ return nullptr;
}
- if (HasError())
- return nullptr;
return pdfium::MakeUnique<CXFA_FMVarExpression>(line, ident, std::move(expr));
}
std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseSimpleExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseLogicalOrExpression();
+ if (!pExp1)
+ return nullptr;
int level = 1;
- while (m_pToken->m_type == TOKassign) {
- NextToken();
+ while (m_token->m_type == TOKassign) {
+ if (!NextToken())
+ return nullptr;
std::unique_ptr<CXFA_FMSimpleExpression> pExp2 = ParseLogicalOrExpression();
- if (level++ == kMaxAssignmentChainLength)
- m_ParserError = true;
- if (!HasError()) {
- pExp1 = pdfium::MakeUnique<CXFA_FMAssignExpression>(
- line, TOKassign, std::move(pExp1), std::move(pExp2));
- } else {
- pExp1.reset();
+ if (!pExp2)
+ return nullptr;
+ if (level++ == kMaxAssignmentChainLength) {
+ m_error = true;
+ return nullptr;
}
+ pExp1 = pdfium::MakeUnique<CXFA_FMAssignExpression>(
+ line, TOKassign, std::move(pExp1), std::move(pExp2));
}
return pExp1;
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseExpExpression() {
- uint32_t line = m_pToken->m_line_num;
- std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseSimpleExpression();
if (HasError())
return nullptr;
+ uint32_t line = m_token->m_line_num;
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseSimpleExpression();
+ if (!pExp1)
+ return nullptr;
return pdfium::MakeUnique<CXFA_FMExpExpression>(line, std::move(pExp1));
}
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseLogicalOrExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseLogicalAndExpression();
+ if (!e1)
+ return nullptr;
+
for (;;) {
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKor:
case TOKksor: {
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> e2(
ParseLogicalAndExpression());
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMLogicalOrExpression>(
- line, TOKor, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMLogicalOrExpression>(
+ line, TOKor, std::move(e1), std::move(e2));
continue;
}
default:
@@ -248,20 +298,27 @@ CXFA_FMParse::ParseLogicalOrExpression() {
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseLogicalAndExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseEqualityExpression();
+ if (!e1)
+ return nullptr;
+
for (;;) {
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKand:
case TOKksand: {
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> e2 = ParseEqualityExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMLogicalAndExpression>(
- line, TOKand, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMLogicalAndExpression>(
+ line, TOKand, std::move(e1), std::move(e2));
continue;
}
default:
@@ -274,32 +331,39 @@ CXFA_FMParse::ParseLogicalAndExpression() {
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseEqualityExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseRelationalExpression();
+ if (!e1)
+ return nullptr;
for (;;) {
std::unique_ptr<CXFA_FMSimpleExpression> e2;
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKeq:
case TOKkseq:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseRelationalExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMEqualityExpression>(
- line, TOKeq, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMEqualityExpression>(
+ line, TOKeq, std::move(e1), std::move(e2));
continue;
case TOKne:
case TOKksne:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseRelationalExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMEqualityExpression>(
- line, TOKne, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMEqualityExpression>(
+ line, TOKne, std::move(e1), std::move(e2));
continue;
default:
break;
@@ -311,54 +375,64 @@ CXFA_FMParse::ParseEqualityExpression() {
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseRelationalExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseAddtiveExpression();
+ if (!e1)
+ return nullptr;
+
for (;;) {
std::unique_ptr<CXFA_FMSimpleExpression> e2;
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKlt:
case TOKkslt:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseAddtiveExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
- line, TOKlt, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKlt, std::move(e1), std::move(e2));
continue;
case TOKgt:
case TOKksgt:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseAddtiveExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
- line, TOKgt, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKgt, std::move(e1), std::move(e2));
continue;
case TOKle:
case TOKksle:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseAddtiveExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
- line, TOKle, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKle, std::move(e1), std::move(e2));
continue;
case TOKge:
case TOKksge:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseAddtiveExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
- line, TOKge, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKge, std::move(e1), std::move(e2));
continue;
default:
break;
@@ -370,30 +444,38 @@ CXFA_FMParse::ParseRelationalExpression() {
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseAddtiveExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseMultiplicativeExpression();
+ if (!e1)
+ return nullptr;
+
for (;;) {
std::unique_ptr<CXFA_FMSimpleExpression> e2;
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKplus:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseMultiplicativeExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMAdditiveExpression>(
- line, TOKplus, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMAdditiveExpression>(
+ line, TOKplus, std::move(e1), std::move(e2));
continue;
case TOKminus:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseMultiplicativeExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMAdditiveExpression>(
- line, TOKminus, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMAdditiveExpression>(
+ line, TOKminus, std::move(e1), std::move(e2));
continue;
default:
break;
@@ -405,30 +487,38 @@ CXFA_FMParse::ParseAddtiveExpression() {
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseMultiplicativeExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseUnaryExpression();
+ if (!e1)
+ return nullptr;
+
for (;;) {
std::unique_ptr<CXFA_FMSimpleExpression> e2;
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKmul:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseUnaryExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMMultiplicativeExpression>(
- line, TOKmul, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMMultiplicativeExpression>(
+ line, TOKmul, std::move(e1), std::move(e2));
continue;
case TOKdiv:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
e2 = ParseUnaryExpression();
- if (!HasError()) {
- e1 = pdfium::MakeUnique<CXFA_FMMultiplicativeExpression>(
- line, TOKdiv, std::move(e1), std::move(e2));
- } else {
- e1.reset();
- }
+ if (!e2)
+ return nullptr;
+
+ e1 = pdfium::MakeUnique<CXFA_FMMultiplicativeExpression>(
+ line, TOKdiv, std::move(e1), std::move(e2));
continue;
default:
break;
@@ -439,35 +529,46 @@ CXFA_FMParse::ParseMultiplicativeExpression() {
}
std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseUnaryExpression() {
+ if (HasError())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> expr;
- uint32_t line = m_pToken->m_line_num;
- switch (m_pToken->m_type) {
+ uint32_t line = m_token->m_line_num;
+ switch (m_token->m_type) {
case TOKplus:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
expr = ParseUnaryExpression();
- if (!HasError())
- expr = pdfium::MakeUnique<CXFA_FMPosExpression>(line, std::move(expr));
- else
- expr.reset();
+ if (!expr)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMPosExpression>(line, std::move(expr));
break;
case TOKminus:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
expr = ParseUnaryExpression();
- if (!HasError())
- expr = pdfium::MakeUnique<CXFA_FMNegExpression>(line, std::move(expr));
- else
- expr.reset();
+ if (!expr)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMNegExpression>(line, std::move(expr));
break;
case TOKksnot:
- NextToken();
+ if (!NextToken())
+ return nullptr;
+
expr = ParseUnaryExpression();
- if (!HasError())
- expr = pdfium::MakeUnique<CXFA_FMNotExpression>(line, std::move(expr));
- else
- expr.reset();
+ if (!expr)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMNotExpression>(line, std::move(expr));
break;
default:
expr = ParsePrimaryExpression();
+ if (!expr)
+ return nullptr;
break;
}
return expr;
@@ -475,29 +576,39 @@ std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseUnaryExpression() {
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParsePrimaryExpression() {
+ if (HasError())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> expr;
- uint32_t line = m_pToken->m_line_num;
- switch (m_pToken->m_type) {
+ uint32_t line = m_token->m_line_num;
+ switch (m_token->m_type) {
case TOKnumber:
expr =
- pdfium::MakeUnique<CXFA_FMNumberExpression>(line, m_pToken->m_string);
- NextToken();
+ pdfium::MakeUnique<CXFA_FMNumberExpression>(line, m_token->m_string);
+ if (!NextToken())
+ return nullptr;
break;
case TOKstring:
expr =
- pdfium::MakeUnique<CXFA_FMStringExpression>(line, m_pToken->m_string);
- NextToken();
+ pdfium::MakeUnique<CXFA_FMStringExpression>(line, m_token->m_string);
+ if (!NextToken())
+ return nullptr;
break;
case TOKidentifier: {
- CFX_WideStringC wsIdentifier(m_pToken->m_string);
- NextToken();
- if (m_pToken->m_type == TOKlbracket) {
+ CFX_WideStringC wsIdentifier(m_token->m_string);
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type == TOKlbracket) {
std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
- if (s) {
- expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
- line, nullptr, TOKdot, wsIdentifier, std::move(s));
- }
- NextToken();
+ if (!s)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ line, nullptr, TOKdot, wsIdentifier, std::move(s));
+ if (!expr)
+ return nullptr;
+ if (!NextToken())
+ return nullptr;
} else {
expr =
pdfium::MakeUnique<CXFA_FMIdentifierExpression>(line, wsIdentifier);
@@ -505,125 +616,139 @@ CXFA_FMParse::ParsePrimaryExpression() {
break;
}
case TOKif:
- expr = pdfium::MakeUnique<CXFA_FMIdentifierExpression>(
- line, m_pToken->m_string);
- NextToken();
+ expr = pdfium::MakeUnique<CXFA_FMIdentifierExpression>(line,
+ m_token->m_string);
+ if (!expr || !NextToken())
+ return nullptr;
break;
case TOKnull:
expr = pdfium::MakeUnique<CXFA_FMNullExpression>(line);
- NextToken();
+ if (!expr || !NextToken())
+ return nullptr;
break;
case TOKlparen:
expr = ParseParenExpression();
+ if (!expr)
+ return nullptr;
break;
default:
- m_ParserError = true;
- NextToken();
- break;
+ m_error = true;
+ return nullptr;
}
expr = ParsePostExpression(std::move(expr));
- if (HasError())
- expr.reset();
+ if (!expr)
+ return nullptr;
return expr;
}
std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParsePostExpression(
std::unique_ptr<CXFA_FMSimpleExpression> expr) {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
while (1) {
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKlparen: {
- NextToken();
+ if (!NextToken())
+ return nullptr;
std::vector<std::unique_ptr<CXFA_FMSimpleExpression>> expressions;
- if (m_pToken->m_type != TOKrparen) {
- while (m_pToken->m_type != TOKrparen) {
+ if (m_token->m_type != TOKrparen) {
+ while (m_token->m_type != TOKrparen) {
if (std::unique_ptr<CXFA_FMSimpleExpression> expr =
ParseSimpleExpression())
expressions.push_back(std::move(expr));
- if (m_pToken->m_type == TOKcomma) {
- NextToken();
- } else if (m_pToken->m_type == TOKeof ||
- m_pToken->m_type == TOKreserver) {
+ if (m_token->m_type == TOKcomma) {
+ if (!NextToken())
+ return nullptr;
+ } else if (m_token->m_type == TOKeof ||
+ m_token->m_type == TOKreserver) {
break;
}
}
- if (m_pToken->m_type != TOKrparen)
- m_ParserError = true;
- }
- if (!HasError()) {
- expr = pdfium::MakeUnique<CXFA_FMCallExpression>(
- line, std::move(expr), std::move(expressions), false);
- NextToken();
- if (m_pToken->m_type != TOKlbracket)
- continue;
-
- std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
- if (s) {
- expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
- line, std::move(expr), TOKcall, L"", std::move(s));
- } else {
- expr.reset();
+ if (m_token->m_type != TOKrparen) {
+ m_error = true;
+ return nullptr;
}
- } else {
- expr.reset();
}
+ expr = pdfium::MakeUnique<CXFA_FMCallExpression>(
+ line, std::move(expr), std::move(expressions), false);
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKlbracket)
+ continue;
+
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
+ if (!s)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ line, std::move(expr), TOKcall, L"", std::move(s));
break;
}
- case TOKdot:
- NextToken();
- if (m_pToken->m_type == TOKidentifier) {
- CFX_WideStringC tempStr = m_pToken->m_string;
- uint32_t tempLine = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type == TOKlparen) {
- std::unique_ptr<CXFA_FMSimpleExpression> pExpCall;
- NextToken();
- std::vector<std::unique_ptr<CXFA_FMSimpleExpression>> expressions;
- if (m_pToken->m_type != TOKrparen) {
- while (m_pToken->m_type != TOKrparen) {
- std::unique_ptr<CXFA_FMSimpleExpression> exp =
- ParseSimpleExpression();
- expressions.push_back(std::move(exp));
- if (m_pToken->m_type == TOKcomma) {
- NextToken();
- } else if (m_pToken->m_type == TOKeof ||
- m_pToken->m_type == TOKreserver) {
- break;
- }
- }
- if (m_pToken->m_type != TOKrparen)
- m_ParserError = true;
- }
- if (!HasError()) {
- std::unique_ptr<CXFA_FMSimpleExpression> pIdentifier =
- pdfium::MakeUnique<CXFA_FMIdentifierExpression>(tempLine,
- tempStr);
- pExpCall = pdfium::MakeUnique<CXFA_FMCallExpression>(
- line, std::move(pIdentifier), std::move(expressions), true);
- expr = pdfium::MakeUnique<CXFA_FMMethodCallExpression>(
- line, std::move(expr), std::move(pExpCall));
- NextToken();
- if (m_pToken->m_type != TOKlbracket)
- continue;
-
- std::unique_ptr<CXFA_FMSimpleExpression> s =
- ParseIndexExpression();
- if (s) {
- expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
- line, std::move(expr), TOKcall, L"", std::move(s));
- } else {
- expr.reset();
+ case TOKdot: {
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
+ }
+ CFX_WideStringC tempStr = m_token->m_string;
+ uint32_t tempLine = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type == TOKlparen) {
+ std::unique_ptr<CXFA_FMSimpleExpression> pExpCall;
+ if (!NextToken())
+ return nullptr;
+
+ std::vector<std::unique_ptr<CXFA_FMSimpleExpression>> expressions;
+ if (m_token->m_type != TOKrparen) {
+ while (m_token->m_type != TOKrparen) {
+ std::unique_ptr<CXFA_FMSimpleExpression> exp =
+ ParseSimpleExpression();
+ if (!exp)
+ return nullptr;
+
+ expressions.push_back(std::move(exp));
+ if (m_token->m_type == TOKcomma) {
+ if (!NextToken())
+ return nullptr;
+ } else if (m_token->m_type == TOKeof ||
+ m_token->m_type == TOKreserver) {
+ break;
}
- } else {
- expr.reset();
}
- } else if (m_pToken->m_type == TOKlbracket) {
- std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
- if (HasError())
+ if (m_token->m_type != TOKrparen) {
+ m_error = true;
return nullptr;
+ }
+ }
+ std::unique_ptr<CXFA_FMSimpleExpression> pIdentifier =
+ pdfium::MakeUnique<CXFA_FMIdentifierExpression>(tempLine,
+ tempStr);
+ pExpCall = pdfium::MakeUnique<CXFA_FMCallExpression>(
+ line, std::move(pIdentifier), std::move(expressions), true);
+ expr = pdfium::MakeUnique<CXFA_FMMethodCallExpression>(
+ line, std::move(expr), std::move(pExpCall));
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKlbracket)
+ continue;
- expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
- tempLine, std::move(expr), TOKdot, tempStr, std::move(s));
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
+ if (!s)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ line, std::move(expr), TOKcall, L"", std::move(s));
+ } else if (m_token->m_type == TOKlbracket) {
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
+ if (!s)
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ tempLine, std::move(expr), TOKdot, tempStr, std::move(s));
} else {
std::unique_ptr<CXFA_FMSimpleExpression> s =
pdfium::MakeUnique<CXFA_FMIndexExpression>(
@@ -632,20 +757,22 @@ std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParsePostExpression(
line, std::move(expr), TOKdot, tempStr, std::move(s));
continue;
}
- } else {
- m_ParserError = true;
- return expr;
}
break;
- case TOKdotdot:
- NextToken();
- if (m_pToken->m_type == TOKidentifier) {
- CFX_WideStringC tempStr = m_pToken->m_string;
- uint32_t tempLine = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type == TOKlbracket) {
+ case TOKdotdot: {
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
+ }
+ CFX_WideStringC tempStr = m_token->m_string;
+ uint32_t tempLine = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type == TOKlbracket) {
std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
- if (HasError())
+ if (!s)
return nullptr;
expr = pdfium::MakeUnique<CXFA_FMDotDotAccessorExpression>(
@@ -658,21 +785,20 @@ std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParsePostExpression(
line, std::move(expr), TOKdotdot, tempStr, std::move(s));
continue;
}
- } else {
- m_ParserError = true;
- return expr;
}
break;
case TOKdotscream: {
- NextToken();
- if (m_pToken->m_type != TOKidentifier) {
- m_ParserError = true;
- return expr;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
}
- CFX_WideStringC tempStr = m_pToken->m_string;
- uint32_t tempLine = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type != TOKlbracket) {
+ CFX_WideStringC tempStr = m_token->m_string;
+ uint32_t tempLine = m_token->m_line_num;
+ if (NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKlbracket) {
std::unique_ptr<CXFA_FMSimpleExpression> s =
pdfium::MakeUnique<CXFA_FMIndexExpression>(
tempLine, ACCESSOR_NO_INDEX, nullptr, false);
@@ -681,7 +807,7 @@ std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParsePostExpression(
continue;
}
std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
- if (HasError())
+ if (!s)
return nullptr;
expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
@@ -699,80 +825,98 @@ std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParsePostExpression(
default:
return expr;
}
- NextToken();
+ if (!NextToken())
+ return nullptr;
}
return expr;
}
std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseIndexExpression() {
- std::unique_ptr<CXFA_FMSimpleExpression> pExp;
- uint32_t line = m_pToken->m_line_num;
- NextToken();
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> s;
XFA_FM_AccessorIndex accessorIndex = ACCESSOR_NO_RELATIVEINDEX;
- if (m_pToken->m_type == TOKmul) {
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp;
+ if (m_token->m_type == TOKmul) {
pExp = pdfium::MakeUnique<CXFA_FMIndexExpression>(line, accessorIndex,
std::move(s), true);
- NextToken();
- if (m_pToken->m_type != TOKrbracket) {
- m_ParserError = true;
- pExp.reset();
+ if (!pExp || !NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKrbracket) {
+ m_error = true;
+ return nullptr;
}
return pExp;
}
- if (m_pToken->m_type == TOKplus) {
+ if (m_token->m_type == TOKplus) {
accessorIndex = ACCESSOR_POSITIVE_INDEX;
- NextToken();
- } else if (m_pToken->m_type == TOKminus) {
+ if (!NextToken())
+ return nullptr;
+ } else if (m_token->m_type == TOKminus) {
accessorIndex = ACCESSOR_NEGATIVE_INDEX;
- NextToken();
+ if (!NextToken())
+ return nullptr;
}
s = ParseSimpleExpression();
- if (m_pToken->m_type != TOKrbracket) {
- m_ParserError = true;
- } else {
- pExp = pdfium::MakeUnique<CXFA_FMIndexExpression>(line, accessorIndex,
- std::move(s), false);
+ if (!s)
+ return nullptr;
+ if (m_token->m_type != TOKrbracket) {
+ m_error = true;
+ return nullptr;
}
- return pExp;
+ return pdfium::MakeUnique<CXFA_FMIndexExpression>(line, accessorIndex,
+ std::move(s), false);
}
std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseParenExpression() {
- Check(TOKlparen);
+ if (!CheckThenNext(TOKlparen))
+ return nullptr;
- if (m_pToken->m_type == TOKrparen) {
- m_ParserError = true;
- NextToken();
+ if (m_token->m_type == TOKrparen) {
+ m_error = true;
return nullptr;
}
- uint32_t line = m_pToken->m_line_num;
+ uint32_t line = m_token->m_line_num;
std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseLogicalOrExpression();
+ if (!pExp1)
+ return nullptr;
int level = 1;
- while (m_pToken->m_type == TOKassign) {
- NextToken();
+ while (m_token->m_type == TOKassign) {
+ if (!NextToken())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> pExp2 = ParseLogicalOrExpression();
- if (level++ == kMaxAssignmentChainLength)
- m_ParserError = true;
- if (!HasError()) {
- pExp1 = pdfium::MakeUnique<CXFA_FMAssignExpression>(
- line, TOKassign, std::move(pExp1), std::move(pExp2));
- } else {
- pExp1.reset();
+ if (!pExp2)
+ return nullptr;
+ if (level++ == kMaxAssignmentChainLength) {
+ m_error = true;
+ return nullptr;
}
+
+ pExp1 = pdfium::MakeUnique<CXFA_FMAssignExpression>(
+ line, TOKassign, std::move(pExp1), std::move(pExp2));
}
- Check(TOKrparen);
+ if (!CheckThenNext(TOKrparen))
+ return nullptr;
return pExp1;
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseBlockExpression() {
- uint32_t line = m_pToken->m_line_num;
- std::unique_ptr<CXFA_FMExpression> expr;
- std::vector<std::unique_ptr<CXFA_FMExpression>> expressions;
+ if (HasError())
+ return nullptr;
+ uint32_t line = m_token->m_line_num;
+ std::vector<std::unique_ptr<CXFA_FMExpression>> expressions;
while (1) {
- switch (m_pToken->m_type) {
+ std::unique_ptr<CXFA_FMExpression> expr;
+ switch (m_token->m_type) {
case TOKeof:
case TOKendif:
case TOKelseif:
@@ -785,207 +929,256 @@ std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseBlockExpression() {
break;
case TOKfunc:
expr = ParseFunction();
- if (expr) {
- expressions.push_back(std::move(expr));
- }
+ if (!expr)
+ return nullptr;
+
+ expressions.push_back(std::move(expr));
continue;
default:
expr = ParseExpression();
- if (expr) {
- expressions.push_back(std::move(expr));
- }
+ if (!expr)
+ return nullptr;
+
+ expressions.push_back(std::move(expr));
continue;
}
break;
}
- std::unique_ptr<CXFA_FMBlockExpression> pExp;
- if (!HasError()) {
- pExp = pdfium::MakeUnique<CXFA_FMBlockExpression>(line,
- std::move(expressions));
- }
- return pExp;
+ return pdfium::MakeUnique<CXFA_FMBlockExpression>(line,
+ std::move(expressions));
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseIfExpression() {
- uint32_t line = m_pToken->m_line_num;
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
const wchar_t* pStartPos = m_lexer->GetPos();
- NextToken();
- Check(TOKlparen);
+ if (!NextToken() || !CheckThenNext(TOKlparen))
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> pExpression;
- while (m_pToken->m_type != TOKrparen) {
+ while (m_token->m_type != TOKrparen) {
pExpression = ParseSimpleExpression();
- if (m_pToken->m_type != TOKcomma)
+ if (!pExpression)
+ return nullptr;
+ if (m_token->m_type != TOKcomma)
break;
- NextToken();
+ if (!NextToken())
+ return nullptr;
}
- Check(TOKrparen);
- if (m_pToken->m_type != TOKthen) {
+ if (!CheckThenNext(TOKrparen))
+ return nullptr;
+ if (m_token->m_type != TOKthen) {
m_lexer->SetCurrentLine(line);
auto pNewToken = pdfium::MakeUnique<CXFA_FMToken>(line);
- m_pToken = pNewToken.get();
- m_pToken->m_type = TOKidentifier;
- m_pToken->m_string = L"if";
- m_lexer->SetToken(std::move(pNewToken));
+ m_token = std::move(pNewToken);
+ m_token->m_type = TOKidentifier;
+ m_token->m_string = L"if";
m_lexer->SetPos(pStartPos);
return ParseExpExpression();
}
- Check(TOKthen);
+ if (!CheckThenNext(TOKthen))
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> pIfExpression = ParseBlockExpression();
+ if (!pIfExpression)
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> pElseExpression;
- switch (m_pToken->m_type) {
+ switch (m_token->m_type) {
case TOKeof:
case TOKendif:
- Check(TOKendif);
+ if (!CheckThenNext(TOKendif))
+ return nullptr;
break;
case TOKif:
pElseExpression = ParseIfExpression();
- Check(TOKendif);
+ if (!pElseExpression || !CheckThenNext(TOKendif))
+ return nullptr;
break;
case TOKelseif:
pElseExpression = ParseIfExpression();
+ if (!pElseExpression)
+ return nullptr;
break;
case TOKelse:
- NextToken();
+ if (!NextToken())
+ return nullptr;
pElseExpression = ParseBlockExpression();
- Check(TOKendif);
+ if (!pElseExpression || !CheckThenNext(TOKendif))
+ return nullptr;
break;
default:
- m_ParserError = true;
- NextToken();
- break;
+ m_error = true;
+ return nullptr;
}
- std::unique_ptr<CXFA_FMIfExpression> pExp;
- if (!HasError()) {
- pExp = pdfium::MakeUnique<CXFA_FMIfExpression>(line, std::move(pExpression),
- std::move(pIfExpression),
- std::move(pElseExpression));
- }
- return pExp;
+ return pdfium::MakeUnique<CXFA_FMIfExpression>(line, std::move(pExpression),
+ std::move(pIfExpression),
+ std::move(pElseExpression));
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseWhileExpression() {
- uint32_t line = m_pToken->m_line_num;
- NextToken();
+ if (HasError())
+ return nullptr;
+
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> pCondition = ParseParenExpression();
- Check(TOKdo);
+ if (!pCondition || !CheckThenNext(TOKdo))
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> pExpression = ParseBlockExpression();
- Check(TOKendwhile);
- std::unique_ptr<CXFA_FMExpression> expr;
- if (!HasError()) {
- expr = pdfium::MakeUnique<CXFA_FMWhileExpression>(
- line, std::move(pCondition), std::move(pExpression));
- }
- return expr;
+ if (!pExpression || !CheckThenNext(TOKendwhile))
+ return nullptr;
+ return pdfium::MakeUnique<CXFA_FMWhileExpression>(line, std::move(pCondition),
+ std::move(pExpression));
}
std::unique_ptr<CXFA_FMSimpleExpression>
CXFA_FMParse::ParseSubassignmentInForExpression() {
- std::unique_ptr<CXFA_FMSimpleExpression> expr;
- switch (m_pToken->m_type) {
- case TOKidentifier:
- expr = ParseSimpleExpression();
- break;
- default:
- m_ParserError = true;
- NextToken();
- break;
+ if (HasError())
+ return nullptr;
+
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
}
+ std::unique_ptr<CXFA_FMSimpleExpression> expr = ParseSimpleExpression();
+ if (!expr)
+ return nullptr;
return expr;
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseForExpression() {
+ if (HasError())
+ return nullptr;
+
CFX_WideStringC wsVariant;
- uint32_t line = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type != TOKidentifier)
- m_ParserError = true;
-
- wsVariant = m_pToken->m_string;
- NextToken();
- std::unique_ptr<CXFA_FMSimpleExpression> pAssignment;
- if (m_pToken->m_type == TOKassign) {
- NextToken();
- pAssignment = ParseSimpleExpression();
- } else {
- m_ParserError = true;
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
+ }
+
+ wsVariant = m_token->m_string;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKassign) {
+ m_error = true;
+ return nullptr;
}
+ if (!NextToken())
+ return nullptr;
+
+ std::unique_ptr<CXFA_FMSimpleExpression> pAssignment =
+ ParseSimpleExpression();
+ if (!pAssignment)
+ return nullptr;
int32_t iDirection = 0;
- if (m_pToken->m_type == TOKupto)
+ if (m_token->m_type == TOKupto) {
iDirection = 1;
- else if (m_pToken->m_type == TOKdownto)
+ } else if (m_token->m_type == TOKdownto) {
iDirection = -1;
- else
- m_ParserError = true;
+ } else {
+ m_error = true;
+ return nullptr;
+ }
+
+ if (!NextToken())
+ return nullptr;
- NextToken();
std::unique_ptr<CXFA_FMSimpleExpression> pAccessor = ParseSimpleExpression();
+ if (!pAccessor)
+ return nullptr;
+
std::unique_ptr<CXFA_FMSimpleExpression> pStep;
- if (m_pToken->m_type == TOKstep) {
- NextToken();
+ if (m_token->m_type == TOKstep) {
+ if (!NextToken())
+ return nullptr;
pStep = ParseSimpleExpression();
+ if (!pStep)
+ return nullptr;
}
- Check(TOKdo);
+ if (!CheckThenNext(TOKdo))
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> pList = ParseBlockExpression();
- Check(TOKendfor);
+ if (!pList || !CheckThenNext(TOKendfor))
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> expr;
- if (!HasError()) {
- expr = pdfium::MakeUnique<CXFA_FMForExpression>(
- line, wsVariant, std::move(pAssignment), std::move(pAccessor),
- iDirection, std::move(pStep), std::move(pList));
- }
- return expr;
+ if (!expr)
+ return nullptr;
+ return pdfium::MakeUnique<CXFA_FMForExpression>(
+ line, wsVariant, std::move(pAssignment), std::move(pAccessor), iDirection,
+ std::move(pStep), std::move(pList));
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseForeachExpression() {
+ if (HasError())
+ return nullptr;
+
std::unique_ptr<CXFA_FMExpression> expr;
CFX_WideStringC wsIdentifier;
std::vector<std::unique_ptr<CXFA_FMSimpleExpression>> pAccessors;
std::unique_ptr<CXFA_FMExpression> pList;
- uint32_t line = m_pToken->m_line_num;
- NextToken();
- if (m_pToken->m_type != TOKidentifier)
- m_ParserError = true;
-
- wsIdentifier = m_pToken->m_string;
- NextToken();
- Check(TOKin);
- Check(TOKlparen);
- if (m_pToken->m_type == TOKrparen) {
- m_ParserError = true;
- NextToken();
- } else {
- while (m_pToken->m_type != TOKrparen) {
- std::unique_ptr<CXFA_FMSimpleExpression> s = ParseSimpleExpression();
- if (s)
- pAccessors.push_back(std::move(s));
- if (m_pToken->m_type != TOKcomma)
- break;
- NextToken();
- }
- Check(TOKrparen);
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+ if (m_token->m_type != TOKidentifier) {
+ m_error = true;
+ return nullptr;
}
- Check(TOKdo);
- pList = ParseBlockExpression();
- Check(TOKendfor);
- if (!HasError()) {
- expr = pdfium::MakeUnique<CXFA_FMForeachExpression>(
- line, wsIdentifier, std::move(pAccessors), std::move(pList));
+
+ wsIdentifier = m_token->m_string;
+ if (!NextToken() || !CheckThenNext(TOKin) || !CheckThenNext(TOKlparen))
+ return nullptr;
+ if (m_token->m_type == TOKrparen) {
+ m_error = true;
+ return nullptr;
}
- return expr;
+
+ while (m_token->m_type != TOKrparen) {
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseSimpleExpression();
+ if (!s)
+ return nullptr;
+
+ pAccessors.push_back(std::move(s));
+ if (m_token->m_type != TOKcomma)
+ break;
+ if (!NextToken())
+ return nullptr;
+ }
+ if (!CheckThenNext(TOKrparen) || !CheckThenNext(TOKdo))
+ return nullptr;
+
+ pList = ParseBlockExpression();
+ if (!pList || !CheckThenNext(TOKendfor))
+ return nullptr;
+ return pdfium::MakeUnique<CXFA_FMForeachExpression>(
+ line, wsIdentifier, std::move(pAccessors), std::move(pList));
}
std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseDoExpression() {
- uint32_t line = m_pToken->m_line_num;
- NextToken();
- std::unique_ptr<CXFA_FMExpression> expr = ParseBlockExpression();
- Check(TOKend);
if (HasError())
return nullptr;
+ uint32_t line = m_token->m_line_num;
+ if (!NextToken())
+ return nullptr;
+
+ std::unique_ptr<CXFA_FMExpression> expr = ParseBlockExpression();
+ if (!expr || !CheckThenNext(TOKend))
+ return nullptr;
return pdfium::MakeUnique<CXFA_FMDoExpression>(line, std::move(expr));
}
bool CXFA_FMParse::HasError() const {
- return m_ParserError || m_lexer->HasError();
+ return m_error || m_token == nullptr;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 19:13:02 +0000