src/script/qscriptasm_p.h

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  41
  42 #ifndef QSCRIPTASM_P_H
  43 #define QSCRIPTASM_P_H
  44
  45 //
  46 //  W A R N I N G
  47 //  -------------
  48 //
  49 // This file is not part of the Qt API.  It exists purely as an
  50 // implementation detail.  This header file may change from version to
  51 // version without notice, or even be removed.
  52 //
  53 // We mean it.
  54 //
  55
  56 #include <QtCore/qglobal.h>
  57
  58 #ifndef QT_NO_SCRIPT
  59
  60 #include <QtCore/qvector.h>
  61
  62 #include "qscriptvalueimplfwd_p.h"
  63
  64 QT_BEGIN_NAMESPACE
  65
  66 class QTextStream;
  67
  68 class QScriptInstruction
  69 {
  70 public:
  71     enum Operator {
  72 #define Q_SCRIPT_DEFINE_OPERATOR(op) OP_##op,
  73 #include "instruction.table"
  74 #undef Q_SCRIPT_DEFINE_OPERATOR
  75         OP_Dummy
  76     };
  77
  78 public:
  79     Operator op;
  80     QScriptValueImpl operand[2];
  81 #if defined(Q_SCRIPT_DIRECT_CODE)
  82     void *code;
  83 #endif
  84
  85     void print(QTextStream &out) const;
  86
  87     static const char *opcode[];
  88 };
  89
  90 namespace QScript {
  91
  92 class NodePool;
  93
  94 class ExceptionHandlerDescriptor
  95 {
  96 public:
  97     ExceptionHandlerDescriptor()
  98         : m_startInstruction(0),
  99           m_endInstruction(0),
 100           m_handlerInstruction(0) {}
 101
 102     ExceptionHandlerDescriptor(
 103         int startInstruction,
 104         int endInstruction,
 105         int handlerInstruction)
 106         : m_startInstruction(startInstruction),
 107           m_endInstruction(endInstruction),
 108           m_handlerInstruction(handlerInstruction) {}
 109
 110     inline int startInstruction() const { return m_startInstruction; }
 111     inline int endInstruction() const { return m_endInstruction; }
 112     inline int handlerInstruction() const { return m_handlerInstruction; }
 113
 114 private:
 115     int m_startInstruction;
 116     int m_endInstruction;
 117     int m_handlerInstruction;
 118 };
 119
 120 class CompilationUnit
 121 {
 122 public:
 123     CompilationUnit(): m_valid(true),
 124         m_errorLineNumber(-1) {}
 125
 126     bool isValid() const { return m_valid; }
 127
 128     void setError(const QString &message, int lineNumber)
 129     {
 130         m_errorMessage = message;
 131         m_errorLineNumber = lineNumber;
 132         m_valid = false;
 133     }
 134
 135     QString errorMessage() const
 136         { return m_errorMessage; }
 137     int errorLineNumber() const
 138         { return m_errorLineNumber; }
 139
 140     QVector<QScriptInstruction> instructions() const
 141         { return m_instructions; }
 142     void setInstructions(const QVector<QScriptInstruction> &instructions)
 143         { m_instructions = instructions; }
 144
 145     QVector<ExceptionHandlerDescriptor> exceptionHandlers() const
 146         { return m_exceptionHandlers; }
 147     void setExceptionHandlers(const QVector<ExceptionHandlerDescriptor> &exceptionHandlers)
 148         { m_exceptionHandlers = exceptionHandlers; }
 149
 150 private:
 151     bool m_valid;
 152     QString m_errorMessage;
 153     int m_errorLineNumber;
 154     QVector<QScriptInstruction> m_instructions;
 155     QVector<ExceptionHandlerDescriptor> m_exceptionHandlers;
 156 };
 157
 158 class Code
 159 {
 160 public:
 161     Code();
 162     ~Code();
 163
 164     void init(const CompilationUnit &compilation, NodePool *astPool);
 165
 166 public: // attributes
 167     bool optimized;
 168     QScriptInstruction *firstInstruction;
 169     QScriptInstruction *lastInstruction;
 170     QVector<ExceptionHandlerDescriptor> exceptionHandlers;
 171     NodePool *astPool;
 172
 173 private:
 174     Q_DISABLE_COPY(Code)
 175 };
 176
 177
 178 } // namespace QScript
 179
 180 QT_END_NAMESPACE
 181
 182 #endif // QT_NO_SCRIPT
 183 #endif // QSCRIPTASM_P_H