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authorDan Sinclair <dsinclair@chromium.org>2017-05-16 15:14:02 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-05-17 03:08:06 +0000
commit2e9d47ac2c9a4ebf0821d10c766fafa85e6d3cb9 (patch)
tree212ca832851067eb5f40cf49c1dc2ffe81a24ada /xfa/fxfa/fm2js/cxfa_fmparse.cpp
parent7876609b3540137663d48282ad94ba42a3749e73 (diff)
downloadpdfium-2e9d47ac2c9a4ebf0821d10c766fafa85e6d3cb9.tar.xz
Rename formcalc files to better match contents
Most files match the contents. The expression files are named to match their base type even though they contain all the expression subclasses. Change-Id: I3b7705c7b206a9fa1afae8b677f765e8b788e84d Reviewed-on: https://pdfium-review.googlesource.com/5492 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Nicolás Peña <npm@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
Diffstat (limited to 'xfa/fxfa/fm2js/cxfa_fmparse.cpp')
-rw-r--r--xfa/fxfa/fm2js/cxfa_fmparse.cpp998
1 files changed, 998 insertions, 0 deletions
diff --git a/xfa/fxfa/fm2js/cxfa_fmparse.cpp b/xfa/fxfa/fm2js/cxfa_fmparse.cpp
new file mode 100644
index 0000000000..cac7ad1b59
--- /dev/null
+++ b/xfa/fxfa/fm2js/cxfa_fmparse.cpp
@@ -0,0 +1,998 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "xfa/fxfa/fm2js/cxfa_fmparse.h"
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "third_party/base/ptr_util.h"
+
+namespace {
+
+const int kMaxAssignmentChainLength = 12;
+
+} // namespace
+
+CXFA_FMParse::CXFA_FMParse(const CFX_WideStringC& wsFormcalc,
+ CXFA_FMErrorInfo* pErrorInfo)
+ : m_pToken(nullptr), m_pErrorInfo(pErrorInfo) {
+ m_lexer = pdfium::MakeUnique<CXFA_FMLexer>(wsFormcalc, m_pErrorInfo);
+}
+
+CXFA_FMParse::~CXFA_FMParse() {}
+
+void CXFA_FMParse::NextToken() {
+ m_pToken = m_lexer->NextToken();
+ while (m_pToken->m_type == TOKreserver) {
+ if (m_lexer->HasError())
+ break;
+
+ m_pToken = m_lexer->NextToken();
+ }
+}
+
+void CXFA_FMParse::Check(XFA_FM_TOKEN op) {
+ if (m_pToken->m_type != op) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(op),
+ m_pToken->m_wstring.c_str());
+ }
+ NextToken();
+}
+
+void CXFA_FMParse::Error(const wchar_t* msg, ...) {
+ m_pErrorInfo->linenum = m_pToken->m_uLinenum;
+ va_list ap;
+ va_start(ap, msg);
+ m_pErrorInfo->message.FormatV(msg, ap);
+ va_end(ap);
+ ASSERT(!m_pErrorInfo->message.IsEmpty());
+}
+
+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) {
+ return expressions;
+ }
+
+ expr = m_pToken->m_type == TOKfunc ? ParseFunction() : ParseExpression();
+ if (!expr)
+ break;
+ expressions.push_back(std::move(expr));
+ }
+ return expressions;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseFunction() {
+ CFX_WideStringC ident;
+ std::vector<CFX_WideStringC> arguments;
+ std::vector<std::unique_ptr<CXFA_FMExpression>> expressions;
+ uint32_t line = m_pToken->m_uLinenum;
+ NextToken();
+ if (m_pToken->m_type != TOKidentifier) {
+ Error(kFMErrExpectedIdentifier, m_pToken->m_wstring.c_str());
+ } else {
+ ident = m_pToken->m_wstring;
+ NextToken();
+ }
+ Check(TOKlparen);
+ if (m_pToken->m_type == TOKrparen) {
+ NextToken();
+ } else {
+ while (1) {
+ if (m_pToken->m_type == TOKidentifier) {
+ arguments.push_back(m_pToken->m_wstring);
+ NextToken();
+ if (m_pToken->m_type == TOKcomma) {
+ NextToken();
+ continue;
+ }
+ if (m_pToken->m_type == TOKrparen)
+ NextToken();
+ else
+ Check(TOKrparen);
+ } else {
+ Error(kFMErrExpectedIdentifier, m_pToken->m_wstring.c_str());
+ NextToken();
+ }
+ break;
+ }
+ }
+ Check(TOKdo);
+ if (m_pToken->m_type == TOKendfunc) {
+ NextToken();
+ } else {
+ expressions = ParseTopExpression();
+ Check(TOKendfunc);
+ }
+ 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() {
+ std::unique_ptr<CXFA_FMExpression> expr;
+ uint32_t line = m_pToken->m_uLinenum;
+ switch (m_pToken->m_type) {
+ case TOKvar:
+ expr = ParseVarExpression();
+ break;
+ case TOKnull:
+ case TOKnumber:
+ case TOKstring:
+ case TOKplus:
+ case TOKminus:
+ case TOKksnot:
+ case TOKidentifier:
+ case TOKlparen:
+ expr = ParseExpExpression();
+ break;
+ case TOKif:
+ expr = ParseIfExpression();
+ break;
+ case TOKwhile:
+ expr = ParseWhileExpression();
+ break;
+ case TOKfor:
+ expr = ParseForExpression();
+ break;
+ case TOKforeach:
+ expr = ParseForeachExpression();
+ break;
+ case TOKdo:
+ expr = ParseDoExpression();
+ break;
+ case TOKbreak:
+ expr = pdfium::MakeUnique<CXFA_FMBreakExpression>(line);
+ NextToken();
+ break;
+ case TOKcontinue:
+ expr = pdfium::MakeUnique<CXFA_FMContinueExpression>(line);
+ NextToken();
+ break;
+ default:
+ Error(kFMErrUnexpectedExpression, m_pToken->m_wstring.c_str());
+ NextToken();
+ break;
+ }
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseVarExpression() {
+ CFX_WideStringC ident;
+ uint32_t line = m_pToken->m_uLinenum;
+ NextToken();
+ if (m_pToken->m_type != TOKidentifier) {
+ Error(kFMErrExpectedIdentifier, m_pToken->m_wstring.c_str());
+ } else {
+ ident = m_pToken->m_wstring;
+ NextToken();
+ }
+ std::unique_ptr<CXFA_FMExpression> expr;
+ if (m_pToken->m_type == TOKassign) {
+ NextToken();
+ expr = ParseExpExpression();
+ }
+ 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_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseLogicalOrExpression();
+ int level = 1;
+ while (m_pToken->m_type == TOKassign) {
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp2 = ParseLogicalOrExpression();
+ if (level++ == kMaxAssignmentChainLength)
+ Error(kFMErrLongAssignmentChain);
+ if (m_pErrorInfo->message.IsEmpty()) {
+ pExp1 = pdfium::MakeUnique<CXFA_FMAssignExpression>(
+ line, TOKassign, std::move(pExp1), std::move(pExp2));
+ } else {
+ pExp1.reset();
+ }
+ }
+ return pExp1;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseExpExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseSimpleExpression();
+ if (HasError())
+ 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_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseLogicalAndExpression();
+ for (;;) {
+ switch (m_pToken->m_type) {
+ case TOKor:
+ case TOKksor: {
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> e2(
+ ParseLogicalAndExpression());
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMLogicalOrExpression>(
+ line, TOKor, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ }
+ default:
+ break;
+ }
+ break;
+ }
+ return e1;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression>
+CXFA_FMParse::ParseLogicalAndExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseEqualityExpression();
+ for (;;) {
+ switch (m_pToken->m_type) {
+ case TOKand:
+ case TOKksand: {
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> e2 = ParseEqualityExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMLogicalAndExpression>(
+ line, TOKand, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ }
+ default:
+ break;
+ }
+ break;
+ }
+ return e1;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression>
+CXFA_FMParse::ParseEqualityExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseRelationalExpression();
+ for (;;) {
+ std::unique_ptr<CXFA_FMSimpleExpression> e2;
+ switch (m_pToken->m_type) {
+ case TOKeq:
+ case TOKkseq:
+ NextToken();
+ e2 = ParseRelationalExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMEqualityExpression>(
+ line, TOKeq, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ case TOKne:
+ case TOKksne:
+ NextToken();
+ e2 = ParseRelationalExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMEqualityExpression>(
+ line, TOKne, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+ return e1;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression>
+CXFA_FMParse::ParseRelationalExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseAddtiveExpression();
+ for (;;) {
+ std::unique_ptr<CXFA_FMSimpleExpression> e2;
+ switch (m_pToken->m_type) {
+ case TOKlt:
+ case TOKkslt:
+ NextToken();
+ e2 = ParseAddtiveExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKlt, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ case TOKgt:
+ case TOKksgt:
+ NextToken();
+ e2 = ParseAddtiveExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKgt, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ case TOKle:
+ case TOKksle:
+ NextToken();
+ e2 = ParseAddtiveExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKle, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ case TOKge:
+ case TOKksge:
+ NextToken();
+ e2 = ParseAddtiveExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMRelationalExpression>(
+ line, TOKge, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+ return e1;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression>
+CXFA_FMParse::ParseAddtiveExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseMultiplicativeExpression();
+ for (;;) {
+ std::unique_ptr<CXFA_FMSimpleExpression> e2;
+ switch (m_pToken->m_type) {
+ case TOKplus:
+ NextToken();
+ e2 = ParseMultiplicativeExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMAdditiveExpression>(
+ line, TOKplus, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ case TOKminus:
+ NextToken();
+ e2 = ParseMultiplicativeExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMAdditiveExpression>(
+ line, TOKminus, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+ return e1;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression>
+CXFA_FMParse::ParseMultiplicativeExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> e1 = ParseUnaryExpression();
+ for (;;) {
+ std::unique_ptr<CXFA_FMSimpleExpression> e2;
+ switch (m_pToken->m_type) {
+ case TOKmul:
+ NextToken();
+ e2 = ParseUnaryExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMMultiplicativeExpression>(
+ line, TOKmul, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ case TOKdiv:
+ NextToken();
+ e2 = ParseUnaryExpression();
+ if (m_pErrorInfo->message.IsEmpty()) {
+ e1 = pdfium::MakeUnique<CXFA_FMMultiplicativeExpression>(
+ line, TOKdiv, std::move(e1), std::move(e2));
+ } else {
+ e1.reset();
+ }
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+ return e1;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseUnaryExpression() {
+ std::unique_ptr<CXFA_FMSimpleExpression> expr;
+ uint32_t line = m_pToken->m_uLinenum;
+ switch (m_pToken->m_type) {
+ case TOKplus:
+ NextToken();
+ expr = ParseUnaryExpression();
+ if (m_pErrorInfo->message.IsEmpty())
+ expr = pdfium::MakeUnique<CXFA_FMPosExpression>(line, std::move(expr));
+ else
+ expr.reset();
+ break;
+ case TOKminus:
+ NextToken();
+ expr = ParseUnaryExpression();
+ if (m_pErrorInfo->message.IsEmpty())
+ expr = pdfium::MakeUnique<CXFA_FMNegExpression>(line, std::move(expr));
+ else
+ expr.reset();
+ break;
+ case TOKksnot:
+ NextToken();
+ expr = ParseUnaryExpression();
+ if (m_pErrorInfo->message.IsEmpty())
+ expr = pdfium::MakeUnique<CXFA_FMNotExpression>(line, std::move(expr));
+ else
+ expr.reset();
+ break;
+ default:
+ expr = ParsePrimaryExpression();
+ break;
+ }
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression>
+CXFA_FMParse::ParsePrimaryExpression() {
+ std::unique_ptr<CXFA_FMSimpleExpression> expr;
+ uint32_t line = m_pToken->m_uLinenum;
+ switch (m_pToken->m_type) {
+ case TOKnumber:
+ expr = pdfium::MakeUnique<CXFA_FMNumberExpression>(line,
+ m_pToken->m_wstring);
+ NextToken();
+ break;
+ case TOKstring:
+ expr = pdfium::MakeUnique<CXFA_FMStringExpression>(line,
+ m_pToken->m_wstring);
+ NextToken();
+ break;
+ case TOKidentifier: {
+ CFX_WideStringC wsIdentifier(m_pToken->m_wstring);
+ NextToken();
+ if (m_pToken->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();
+ } else {
+ expr =
+ pdfium::MakeUnique<CXFA_FMIdentifierExpression>(line, wsIdentifier);
+ }
+ break;
+ }
+ case TOKif:
+ expr = pdfium::MakeUnique<CXFA_FMIdentifierExpression>(
+ line, m_pToken->m_wstring);
+ NextToken();
+ break;
+ case TOKnull:
+ expr = pdfium::MakeUnique<CXFA_FMNullExpression>(line);
+ NextToken();
+ break;
+ case TOKlparen:
+ expr = ParseParenExpression();
+ break;
+ default:
+ Error(kFMErrUnexpectedExpression, m_pToken->m_wstring.c_str());
+ NextToken();
+ break;
+ }
+ expr = ParsePostExpression(std::move(expr));
+ if (HasError())
+ expr.reset();
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParsePostExpression(
+ std::unique_ptr<CXFA_FMSimpleExpression> expr) {
+ uint32_t line = m_pToken->m_uLinenum;
+ while (1) {
+ switch (m_pToken->m_type) {
+ case TOKlparen: {
+ NextToken();
+ std::vector<std::unique_ptr<CXFA_FMSimpleExpression>> expressions;
+ if (m_pToken->m_type != TOKrparen) {
+ while (m_pToken->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) {
+ break;
+ }
+ }
+ if (m_pToken->m_type != TOKrparen) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(TOKrparen),
+ m_pToken->m_wstring.c_str());
+ }
+ }
+ if (m_pErrorInfo->message.IsEmpty()) {
+ 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();
+ }
+ } else {
+ expr.reset();
+ }
+ break;
+ }
+ case TOKdot:
+ NextToken();
+ if (m_pToken->m_type == TOKidentifier) {
+ CFX_WideStringC tempStr = m_pToken->m_wstring;
+ uint32_t tempLine = m_pToken->m_uLinenum;
+ 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) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(TOKrparen),
+ m_pToken->m_wstring.c_str());
+ }
+ }
+ if (m_pErrorInfo->message.IsEmpty()) {
+ 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();
+ }
+ } else {
+ expr.reset();
+ }
+ } else if (m_pToken->m_type == TOKlbracket) {
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
+ if (HasError())
+ 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>(
+ tempLine, ACCESSOR_NO_INDEX, nullptr, false);
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ line, std::move(expr), TOKdot, tempStr, std::move(s));
+ continue;
+ }
+ } else {
+ Error(kFMErrExpectedIdentifier, m_pToken->m_wstring.c_str());
+ return expr;
+ }
+ break;
+ case TOKdotdot:
+ NextToken();
+ if (m_pToken->m_type == TOKidentifier) {
+ CFX_WideStringC tempStr = m_pToken->m_wstring;
+ uint32_t tempLine = m_pToken->m_uLinenum;
+ NextToken();
+ if (m_pToken->m_type == TOKlbracket) {
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
+ if (HasError())
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMDotDotAccessorExpression>(
+ tempLine, std::move(expr), TOKdotdot, tempStr, std::move(s));
+ } else {
+ std::unique_ptr<CXFA_FMSimpleExpression> s =
+ pdfium::MakeUnique<CXFA_FMIndexExpression>(
+ tempLine, ACCESSOR_NO_INDEX, nullptr, false);
+ expr = pdfium::MakeUnique<CXFA_FMDotDotAccessorExpression>(
+ line, std::move(expr), TOKdotdot, tempStr, std::move(s));
+ continue;
+ }
+ } else {
+ Error(kFMErrExpectedIdentifier, m_pToken->m_wstring.c_str());
+ return expr;
+ }
+ break;
+ case TOKdotscream: {
+ NextToken();
+ if (m_pToken->m_type != TOKidentifier) {
+ Error(kFMErrExpectedIdentifier, m_pToken->m_wstring.c_str());
+ return expr;
+ }
+ CFX_WideStringC tempStr = m_pToken->m_wstring;
+ uint32_t tempLine = m_pToken->m_uLinenum;
+ NextToken();
+ if (m_pToken->m_type != TOKlbracket) {
+ std::unique_ptr<CXFA_FMSimpleExpression> s =
+ pdfium::MakeUnique<CXFA_FMIndexExpression>(
+ tempLine, ACCESSOR_NO_INDEX, nullptr, false);
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ line, std::move(expr), TOKdotscream, tempStr, std::move(s));
+ continue;
+ }
+ std::unique_ptr<CXFA_FMSimpleExpression> s = ParseIndexExpression();
+ if (HasError())
+ return nullptr;
+
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ tempLine, std::move(expr), TOKdotscream, tempStr, std::move(s));
+ break;
+ }
+ case TOKdotstar: {
+ std::unique_ptr<CXFA_FMSimpleExpression> s =
+ pdfium::MakeUnique<CXFA_FMIndexExpression>(line, ACCESSOR_NO_INDEX,
+ nullptr, false);
+ expr = pdfium::MakeUnique<CXFA_FMDotAccessorExpression>(
+ line, std::move(expr), TOKdotstar, L"*", std::move(s));
+ break;
+ }
+ default:
+ return expr;
+ }
+ NextToken();
+ }
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseIndexExpression() {
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp;
+ uint32_t line = m_pToken->m_uLinenum;
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> s;
+ XFA_FM_AccessorIndex accessorIndex = ACCESSOR_NO_RELATIVEINDEX;
+ if (m_pToken->m_type == TOKmul) {
+ pExp = pdfium::MakeUnique<CXFA_FMIndexExpression>(line, accessorIndex,
+ std::move(s), true);
+ NextToken();
+ if (m_pToken->m_type != TOKrbracket) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(TOKrparen),
+ m_pToken->m_wstring.c_str());
+ pExp.reset();
+ }
+ return pExp;
+ }
+ if (m_pToken->m_type == TOKplus) {
+ accessorIndex = ACCESSOR_POSITIVE_INDEX;
+ NextToken();
+ } else if (m_pToken->m_type == TOKminus) {
+ accessorIndex = ACCESSOR_NEGATIVE_INDEX;
+ NextToken();
+ }
+ s = ParseSimpleExpression();
+ if (m_pToken->m_type != TOKrbracket) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(TOKrparen),
+ m_pToken->m_wstring.c_str());
+ } else {
+ pExp = pdfium::MakeUnique<CXFA_FMIndexExpression>(line, accessorIndex,
+ std::move(s), false);
+ }
+ return pExp;
+}
+
+std::unique_ptr<CXFA_FMSimpleExpression> CXFA_FMParse::ParseParenExpression() {
+ Check(TOKlparen);
+
+ if (m_pToken->m_type == TOKrparen) {
+ Error(kFMErrExpectedNonEmptyExpression);
+ NextToken();
+ return nullptr;
+ }
+
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp1 = ParseLogicalOrExpression();
+
+ int level = 1;
+ while (m_pToken->m_type == TOKassign) {
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> pExp2 = ParseLogicalOrExpression();
+ if (level++ == kMaxAssignmentChainLength)
+ Error(kFMErrLongAssignmentChain);
+ if (m_pErrorInfo->message.IsEmpty()) {
+ pExp1 = pdfium::MakeUnique<CXFA_FMAssignExpression>(
+ line, TOKassign, std::move(pExp1), std::move(pExp2));
+ } else {
+ pExp1.reset();
+ }
+ }
+ Check(TOKrparen);
+ return pExp1;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseBlockExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ std::unique_ptr<CXFA_FMExpression> expr;
+ std::vector<std::unique_ptr<CXFA_FMExpression>> expressions;
+
+ while (1) {
+ switch (m_pToken->m_type) {
+ case TOKeof:
+ case TOKendif:
+ case TOKelseif:
+ case TOKelse:
+ case TOKendwhile:
+ case TOKendfor:
+ case TOKend:
+ case TOKendfunc:
+ case TOKreserver:
+ break;
+ case TOKfunc:
+ expr = ParseFunction();
+ if (expr) {
+ expressions.push_back(std::move(expr));
+ }
+ continue;
+ default:
+ expr = ParseExpression();
+ if (expr) {
+ expressions.push_back(std::move(expr));
+ }
+ continue;
+ }
+ break;
+ }
+ std::unique_ptr<CXFA_FMBlockExpression> pExp;
+ if (m_pErrorInfo->message.IsEmpty()) {
+ pExp = pdfium::MakeUnique<CXFA_FMBlockExpression>(line,
+ std::move(expressions));
+ }
+ return pExp;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseIfExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ const wchar_t* pStartPos = m_lexer->GetPos();
+ NextToken();
+ Check(TOKlparen);
+ std::unique_ptr<CXFA_FMSimpleExpression> pExpression;
+ while (m_pToken->m_type != TOKrparen) {
+ pExpression = ParseSimpleExpression();
+ if (m_pToken->m_type != TOKcomma)
+ break;
+ NextToken();
+ }
+ Check(TOKrparen);
+ if (m_pToken->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_wstring = L"if";
+ m_lexer->SetToken(std::move(pNewToken));
+ m_lexer->SetPos(pStartPos);
+ return ParseExpExpression();
+ }
+ Check(TOKthen);
+ std::unique_ptr<CXFA_FMExpression> pIfExpression = ParseBlockExpression();
+ std::unique_ptr<CXFA_FMExpression> pElseExpression;
+ switch (m_pToken->m_type) {
+ case TOKeof:
+ case TOKendif:
+ Check(TOKendif);
+ break;
+ case TOKif:
+ pElseExpression = ParseIfExpression();
+ Check(TOKendif);
+ break;
+ case TOKelseif:
+ pElseExpression = ParseIfExpression();
+ break;
+ case TOKelse:
+ NextToken();
+ pElseExpression = ParseBlockExpression();
+ Check(TOKendif);
+ break;
+ default:
+ Error(kFMErrExpectedEndIf, m_pToken->m_wstring.c_str());
+ NextToken();
+ break;
+ }
+ std::unique_ptr<CXFA_FMIfExpression> pExp;
+ if (m_pErrorInfo->message.IsEmpty()) {
+ pExp = pdfium::MakeUnique<CXFA_FMIfExpression>(line, std::move(pExpression),
+ std::move(pIfExpression),
+ std::move(pElseExpression));
+ }
+ return pExp;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseWhileExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> pCondition = ParseParenExpression();
+ Check(TOKdo);
+ std::unique_ptr<CXFA_FMExpression> pExpression = ParseBlockExpression();
+ Check(TOKendwhile);
+ std::unique_ptr<CXFA_FMExpression> expr;
+ if (m_pErrorInfo->message.IsEmpty()) {
+ expr = pdfium::MakeUnique<CXFA_FMWhileExpression>(
+ line, std::move(pCondition), std::move(pExpression));
+ }
+ return expr;
+}
+
+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:
+ Error(kFMErrUnexpectedExpression, m_pToken->m_wstring.c_str());
+ NextToken();
+ break;
+ }
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseForExpression() {
+ CFX_WideStringC wsVariant;
+ uint32_t line = m_pToken->m_uLinenum;
+ NextToken();
+ if (m_pToken->m_type != TOKidentifier) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(m_pToken->m_type),
+ m_pToken->m_wstring.c_str());
+ }
+ wsVariant = m_pToken->m_wstring;
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> pAssignment;
+ if (m_pToken->m_type == TOKassign) {
+ NextToken();
+ pAssignment = ParseSimpleExpression();
+ } else {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(m_pToken->m_type),
+ m_pToken->m_wstring.c_str());
+ }
+ int32_t iDirection = 0;
+ if (m_pToken->m_type == TOKupto) {
+ iDirection = 1;
+ } else if (m_pToken->m_type == TOKdownto) {
+ iDirection = -1;
+ } else {
+ Error(kFMErrExpectedToken, L"upto or downto", m_pToken->m_wstring.c_str());
+ }
+ NextToken();
+ std::unique_ptr<CXFA_FMSimpleExpression> pAccessor = ParseSimpleExpression();
+ std::unique_ptr<CXFA_FMSimpleExpression> pStep;
+ if (m_pToken->m_type == TOKstep) {
+ NextToken();
+ pStep = ParseSimpleExpression();
+ }
+ Check(TOKdo);
+ std::unique_ptr<CXFA_FMExpression> pList = ParseBlockExpression();
+ Check(TOKendfor);
+ std::unique_ptr<CXFA_FMExpression> expr;
+ if (m_pErrorInfo->message.IsEmpty()) {
+ expr = pdfium::MakeUnique<CXFA_FMForExpression>(
+ line, wsVariant, std::move(pAssignment), std::move(pAccessor),
+ iDirection, std::move(pStep), std::move(pList));
+ }
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseForeachExpression() {
+ 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_uLinenum;
+ NextToken();
+ if (m_pToken->m_type != TOKidentifier) {
+ Error(kFMErrExpectedToken, XFA_FM_KeywordToString(m_pToken->m_type),
+ m_pToken->m_wstring.c_str());
+ }
+ wsIdentifier = m_pToken->m_wstring;
+ NextToken();
+ Check(TOKin);
+ Check(TOKlparen);
+ if (m_pToken->m_type == TOKrparen) {
+ Error(kFMErrUnexpectedExpression, m_pToken->m_wstring.c_str());
+ 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);
+ }
+ Check(TOKdo);
+ pList = ParseBlockExpression();
+ Check(TOKendfor);
+ if (m_pErrorInfo->message.IsEmpty()) {
+ expr = pdfium::MakeUnique<CXFA_FMForeachExpression>(
+ line, wsIdentifier, std::move(pAccessors), std::move(pList));
+ }
+ return expr;
+}
+
+std::unique_ptr<CXFA_FMExpression> CXFA_FMParse::ParseDoExpression() {
+ uint32_t line = m_pToken->m_uLinenum;
+ NextToken();
+ std::unique_ptr<CXFA_FMExpression> expr = ParseBlockExpression();
+ Check(TOKend);
+ if (HasError())
+ return nullptr;
+
+ return pdfium::MakeUnique<CXFA_FMDoExpression>(line, std::move(expr));
+}
+
+bool CXFA_FMParse::HasError() const {
+ return !m_pErrorInfo->message.IsEmpty();
+}