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/* |
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* Copyright (c) 2014-2015 Christian Schoenebeck |
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* |
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* http://www.linuxsampler.org |
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* |
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* This file is part of LinuxSampler and released under the same terms. |
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* See README file for details. |
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*/ |
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#ifndef LS_COREVMFUNCTIONS_H |
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#define LS_COREVMFUNCTIONS_H |
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#include "../common/global.h" |
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#include "common.h" |
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namespace LinuxSampler { |
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class ScriptVM; |
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/////////////////////////////////////////////////////////////////////////// |
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// convenience base classes for built-in script functions ... |
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/** |
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* An instance of this class is returned by built-in function implementations |
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* which do not return a function return value. |
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*/ |
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class VMEmptyResult : public VMFnResult, public VMExpr { |
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public: |
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StmtFlags_t flags; ///< general completion status (i.e. success or failure) of the function call |
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VMEmptyResult() : flags(STMT_SUCCESS) {} |
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ExprType_t exprType() const { return EMPTY_EXPR; } |
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VMExpr* resultValue() { return this; } |
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StmtFlags_t resultFlags() { return flags; } |
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}; |
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/** |
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* An instance of this class is returned by built-in function implementations |
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* which return an integer value as function return value. |
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*/ |
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class VMIntResult : public VMFnResult, public VMIntExpr { |
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public: |
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StmtFlags_t flags; ///< general completion status (i.e. success or failure) of the function call |
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int value; ///< result value of the function call |
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VMIntResult() : flags(STMT_SUCCESS) {} |
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int evalInt() { return value; } |
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VMExpr* resultValue() { return this; } |
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StmtFlags_t resultFlags() { return flags; } |
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}; |
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/** |
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* An instance of this class is returned by built-in function implementations |
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* which return a string value as function return value. |
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*/ |
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class VMStringResult : public VMFnResult, public VMStringExpr { |
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public: |
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StmtFlags_t flags; ///< general completion status (i.e. success or failure) of the function call |
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String value; ///< result value of the function call |
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VMStringResult() : flags(STMT_SUCCESS) {} |
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String evalStr() { return value; } |
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VMExpr* resultValue() { return this; } |
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StmtFlags_t resultFlags() { return flags; } |
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}; |
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/** |
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* Abstract base class for built-in script functions which do not return any |
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* function return value (void). |
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*/ |
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class VMEmptyResultFunction : public VMFunction { |
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protected: |
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ExprType_t returnType() { return EMPTY_EXPR; } |
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VMFnResult* errorResult(); |
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VMFnResult* successResult(); |
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protected: |
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VMEmptyResult result; |
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}; |
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/** |
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* Abstract base class for built-in script functions which return an integer |
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* (scalar) as their function return value. |
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*/ |
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class VMIntResultFunction : public VMFunction { |
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protected: |
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ExprType_t returnType() { return INT_EXPR; } |
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VMFnResult* errorResult(int i = 0); |
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VMFnResult* successResult(int i = 0); |
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protected: |
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VMIntResult result; |
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}; |
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/** |
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* Abstract base class for built-in script functions which return a string as |
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* their function return value. |
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*/ |
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class VMStringResultFunction : public VMFunction { |
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protected: |
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ExprType_t returnType() { return STRING_EXPR; } |
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VMFnResult* errorResult(const String& s = ""); |
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VMFnResult* successResult(const String& s = ""); |
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protected: |
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VMStringResult result; |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// implementations of core built-in script functions ... |
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/** |
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* Implements the built-in message() script function. |
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*/ |
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class CoreVMFunction_message : public VMEmptyResultFunction { |
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public: |
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int minRequiredArgs() const { return 1; } |
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int maxAllowedArgs() const { return 1; } |
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bool acceptsArgType(int iArg, ExprType_t type) const; |
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ExprType_t argType(int iArg) const { return STRING_EXPR; } |
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VMFnResult* exec(VMFnArgs* args); |
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}; |
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/** |
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* Implements the built-in exit() script function. |
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*/ |
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class CoreVMFunction_exit : public VMEmptyResultFunction { |
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public: |
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int minRequiredArgs() const { return 0; } |
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int maxAllowedArgs() const { return 0; } |
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bool acceptsArgType(int iArg, ExprType_t type) const { return false; } |
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ExprType_t argType(int iArg) const { return INT_EXPR; /*whatever*/ } |
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VMFnResult* exec(VMFnArgs* args); |
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}; |
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/** |
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* Implements the built-in wait() script function. |
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*/ |
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class CoreVMFunction_wait : public VMEmptyResultFunction { |
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public: |
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CoreVMFunction_wait(ScriptVM* vm) : vm(vm) {} |
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int minRequiredArgs() const { return 1; } |
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int maxAllowedArgs() const { return 1; } |
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bool acceptsArgType(int iArg, ExprType_t type) const { return type == INT_EXPR; } |
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ExprType_t argType(int iArg) const { return INT_EXPR; } |
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VMFnResult* exec(VMFnArgs* args); |
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protected: |
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ScriptVM* vm; |
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}; |
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/** |
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* Implements the built-in abs() script function. |
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*/ |
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class CoreVMFunction_abs : public VMIntResultFunction { |
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public: |
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int minRequiredArgs() const { return 1; } |
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int maxAllowedArgs() const { return 1; } |
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bool acceptsArgType(int iArg, ExprType_t type) const; |
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ExprType_t argType(int iArg) const { return INT_EXPR; } |
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VMFnResult* exec(VMFnArgs* args); |
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}; |
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/** |
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* Implements the built-in random() script function. |
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*/ |
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class CoreVMFunction_random : public VMIntResultFunction { |
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public: |
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int minRequiredArgs() const { return 2; } |
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int maxAllowedArgs() const { return 2; } |
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bool acceptsArgType(int iArg, ExprType_t type) const; |
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ExprType_t argType(int iArg) const { return INT_EXPR; } |
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VMFnResult* exec(VMFnArgs* args); |
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}; |
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/** |
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* Implements the built-in num_elements() script function. |
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*/ |
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class CoreVMFunction_num_elements : public VMIntResultFunction { |
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public: |
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int minRequiredArgs() const { return 1; } |
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int maxAllowedArgs() const { return 1; } |
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bool acceptsArgType(int iArg, ExprType_t type) const; |
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ExprType_t argType(int iArg) const { return INT_ARR_EXPR; } |
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VMFnResult* exec(VMFnArgs* args); |
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}; |
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} // namespace LinuxSampler |
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#endif // LS_COREVMFUNCTIONS_H |