/[svn]/linuxsampler/trunk/src/scriptvm/CoreVMFunctions.h
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Diff of /linuxsampler/trunk/src/scriptvm/CoreVMFunctions.h

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revision 3572 by schoenebeck, Sat Aug 24 09:18:57 2019 UTC revision 3573 by schoenebeck, Tue Aug 27 21:36:53 2019 UTC
# Line 56  public: Line 56  public:
56    
57  /**  /**
58   * An instance of this class is returned by built-in function implementations   * An instance of this class is returned by built-in function implementations
59     * which return a real number (floating point) value as function return value.
60     */
61    class VMRealResult : public VMFnResult, public VMRealExpr {
62    public:
63        StmtFlags_t flags; ///< general completion status (i.e. success or failure) of the function call
64        vmfloat value; ///< result value of the function call
65    
66        VMRealResult() : flags(STMT_SUCCESS), value(0) {}
67        vmfloat evalReal() OVERRIDE { return value; }
68        VMExpr* resultValue() OVERRIDE { return this; }
69        StmtFlags_t resultFlags() OVERRIDE { return flags; }
70        bool isConstExpr() const OVERRIDE { return false; }
71        MetricPrefix_t unitPrefix(vmuint i) const OVERRIDE { return VM_NO_PREFIX; }
72        StdUnit_t unitType() const OVERRIDE { return VM_NO_UNIT; }
73        bool isFinal() const OVERRIDE { return false; }
74    };
75    
76    /**
77     * An instance of this class is returned by built-in function implementations
78   * which return a string value as function return value.   * which return a string value as function return value.
79   */   */
80  class VMStringResult : public VMFnResult, public VMStringExpr {  class VMStringResult : public VMFnResult, public VMStringExpr {
# Line 101  protected: Line 120  protected:
120  };  };
121    
122  /**  /**
123     * Abstract base class for built-in script functions which return a real number
124     * (floating point scalar) as their function return value.
125     */
126    class VMRealResultFunction : public VMFunction {
127    protected:
128        virtual ~VMRealResultFunction() {}
129        ExprType_t returnType() OVERRIDE { return REAL_EXPR; }
130        VMFnResult* errorResult(vmfloat f = 0);
131        VMFnResult* successResult(vmfloat f = 0);
132        bool modifiesArg(vmint iArg) const OVERRIDE { return false; }
133    protected:
134        VMRealResult result;
135    };
136    
137    /**
138   * Abstract base class for built-in script functions which return a string as   * Abstract base class for built-in script functions which return a string as
139   * their function return value.   * their function return value.
140   */   */
# Line 322  public: Line 356  public:
356      VMFnResult* exec(VMFnArgs* args) OVERRIDE;      VMFnResult* exec(VMFnArgs* args) OVERRIDE;
357  };  };
358    
359    /**
360     * Implements the built-in real_to_int() script function and its short hand
361     * variant int(). The behaviour of the two built-in script functions are
362     * identical ATM.
363     */
364    class CoreVMFunction_real_to_int : public VMIntResultFunction {
365    public:
366        vmint minRequiredArgs() const OVERRIDE { return 1; }
367        vmint maxAllowedArgs() const OVERRIDE { return 1; }
368        bool acceptsArgType(vmint iArg, ExprType_t type) const OVERRIDE { return type == REAL_EXPR; }
369        ExprType_t argType(vmint iArg) const OVERRIDE { return REAL_EXPR; }
370        VMFnResult* exec(VMFnArgs* args) OVERRIDE;
371    };
372    
373    /**
374     * Implements the built-in int_to_real() script function and its short hand
375     * variant real(). The behaviour of the two built-in script functions are
376     * identical ATM.
377     */
378    class CoreVMFunction_int_to_real : public VMRealResultFunction {
379    public:
380        vmint minRequiredArgs() const OVERRIDE { return 1; }
381        vmint maxAllowedArgs() const OVERRIDE { return 1; }
382        bool acceptsArgType(vmint iArg, ExprType_t type) const OVERRIDE { return type == INT_EXPR; }
383        ExprType_t argType(vmint iArg) const OVERRIDE { return INT_EXPR; }
384        VMFnResult* exec(VMFnArgs* args) OVERRIDE;
385    };
386    
387  } // namespace LinuxSampler  } // namespace LinuxSampler
388    
389  #endif // LS_COREVMFUNCTIONS_H  #endif // LS_COREVMFUNCTIONS_H
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