127 lines
2.2 KiB
C
127 lines
2.2 KiB
C
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// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef XFA_FXFA_FORMCALC_CXFA_FMLEXER_H_
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#define XFA_FXFA_FORMCALC_CXFA_FMLEXER_H_
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#include "core/fxcrt/widestring.h"
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#include "v8/include/cppgc/macros.h"
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enum XFA_FM_TOKEN {
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TOKand,
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TOKlparen,
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TOKrparen,
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TOKmul,
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TOKplus,
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TOKcomma,
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TOKminus,
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TOKdot,
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TOKdiv,
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TOKlt,
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TOKassign,
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TOKgt,
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TOKlbracket,
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TOKrbracket,
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TOKor,
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TOKdotscream,
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TOKdotstar,
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TOKdotdot,
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TOKle,
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TOKne,
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TOKeq,
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TOKge,
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TOKdo,
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TOKkseq,
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TOKksge,
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TOKksgt,
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TOKif,
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TOKin,
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TOKksle,
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TOKkslt,
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TOKksne,
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TOKksor,
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TOKnull,
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TOKbreak,
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TOKksand,
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TOKend,
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TOKeof,
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TOKfor,
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TOKnan,
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TOKksnot,
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TOKvar,
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TOKthen,
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TOKelse,
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TOKexit,
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TOKdownto,
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TOKreturn,
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TOKinfinity,
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TOKendwhile,
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TOKforeach,
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TOKendfunc,
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TOKelseif,
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TOKwhile,
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TOKendfor,
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TOKthrow,
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TOKstep,
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TOKupto,
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TOKcontinue,
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TOKfunc,
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TOKendif,
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TOKstar,
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TOKidentifier,
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TOKunderscore,
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TOKdollar,
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TOKexclamation,
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TOKcall,
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TOKstring,
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TOKnumber,
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TOKreserver
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};
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class CXFA_FMLexer {
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CPPGC_STACK_ALLOCATED(); // Raw pointers allowed.
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public:
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class Token {
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public:
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Token();
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explicit Token(XFA_FM_TOKEN token);
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Token(XFA_FM_TOKEN token, WideStringView str);
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Token(const Token& that);
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~Token();
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XFA_FM_TOKEN GetType() const { return m_type; }
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WideStringView GetString() const { return m_string; }
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#ifndef NDEBUG
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WideString ToDebugString() const;
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#endif // NDEBUG
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private:
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XFA_FM_TOKEN m_type = TOKreserver;
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WideStringView m_string;
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};
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explicit CXFA_FMLexer(WideStringView wsFormcalc);
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~CXFA_FMLexer();
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Token NextToken();
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bool IsComplete() const { return m_nCursor >= m_spInput.size(); }
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private:
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Token AdvanceForNumber();
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Token AdvanceForString();
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Token AdvanceForIdentifier();
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void AdvanceForComment();
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void RaiseError() { m_bLexerError = true; }
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pdfium::span<const wchar_t> m_spInput;
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size_t m_nCursor = 0;
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bool m_bLexerError = false;
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};
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#endif // XFA_FXFA_FORMCALC_CXFA_FMLEXER_H_
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