src/scriptvm/CoreVMFunctions.cpp

/*
 * Copyright (c) 2014-2019 Christian Schoenebeck
 *
 * http://www.linuxsampler.org
 *
 * This file is part of LinuxSampler and released under the same terms.
 * See README file for details.
 */

#include "CoreVMFunctions.h"

#include <iostream>
#include <algorithm> // for std::sort()
#include <math.h>
#include <stdlib.h>
#include "tree.h"
#include "ScriptVM.h"
#include "../common/RTMath.h"

namespace LinuxSampler {

///////////////////////////////////////////////////////////////////////////
// class VMEmptyResultFunction

VMFnResult* VMEmptyResultFunction::errorResult() {
    result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED | STMT_ERROR_OCCURRED);
    return &result;
}

VMFnResult* VMEmptyResultFunction::successResult() {
    result.flags = STMT_SUCCESS;
    return &result;
}

///////////////////////////////////////////////////////////////////////////
// class VMIntResultFunction

VMFnResult* VMIntResultFunction::errorResult(vmint i) {
    result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED | STMT_ERROR_OCCURRED);
    result.value = i;
    return &result;
}

VMFnResult* VMIntResultFunction::successResult(vmint i) {
    result.flags = STMT_SUCCESS;
    result.value = i;
    return &result;
}

///////////////////////////////////////////////////////////////////////////
// class VMRealResultFunction

VMFnResult* VMRealResultFunction::errorResult(vmfloat f) {
    result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED | STMT_ERROR_OCCURRED);
    result.value = f;
    return &result;
}

VMFnResult* VMRealResultFunction::successResult(vmfloat f) {
    result.flags = STMT_SUCCESS;
    result.value = f;
    return &result;
}

///////////////////////////////////////////////////////////////////////////
// class VMStringResultFunction

VMFnResult* VMStringResultFunction::errorResult(const String& s) {
    result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED | STMT_ERROR_OCCURRED);
    result.value = s;
    return &result;
}

VMFnResult* VMStringResultFunction::successResult(const String& s) {
    result.flags = STMT_SUCCESS;
    result.value = s;
    return &result;
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  message()

bool CoreVMFunction_message::acceptsArgType(vmint iArg, ExprType_t type) const {
    return type == INT_EXPR || type == REAL_EXPR || type == STRING_EXPR;
}

VMFnResult* CoreVMFunction_message::exec(VMFnArgs* args) {
    if (!args->argsCount()) return errorResult();

    uint64_t usecs = RTMath::unsafeMicroSeconds(RTMath::real_clock);

    VMStringExpr* strExpr = dynamic_cast<VMStringExpr*>(args->arg(0));
    if (strExpr) {
        printf("[ScriptVM %.3f] %s\n", usecs/1000000.f, strExpr->evalStr().c_str());
        return successResult();
    }

    VMRealExpr* realExpr = dynamic_cast<VMRealExpr*>(args->arg(0));
    if (realExpr) {
        printf("[ScriptVM %.3f] %f\n", usecs/1000000.f, realExpr->evalReal());
        return successResult();
    }

    VMIntExpr* intExpr = dynamic_cast<VMIntExpr*>(args->arg(0));
    if (intExpr) {
        printf("[ScriptVM %.3f] %lld\n", usecs/1000000.f, (int64_t)intExpr->evalInt());
        return successResult();
    }

    return errorResult();
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  exit()

vmint CoreVMFunction_exit::maxAllowedArgs() const {
    return (vm->isExitResultEnabled()) ? 1 : 0;
}

bool CoreVMFunction_exit::acceptsArgType(vmint iArg, ExprType_t type) const {
    if (!vm->isExitResultEnabled()) return false;
    return type == INT_EXPR || type == STRING_EXPR;
}

VMFnResult* CoreVMFunction_exit::exec(VMFnArgs* args) {
    this->result.flags = STMT_ABORT_SIGNALLED;
    if (vm->isExitResultEnabled() && args->argsCount()) {
        ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
        switch (args->arg(0)->exprType()) {
            case INT_EXPR:
                ctx->exitRes.intLiteral.value = args->arg(0)->asInt()->evalInt();
                ctx->exitRes.value = &ctx->exitRes.intLiteral;
                break;
            case STRING_EXPR:
                ctx->exitRes.stringLiteral.value = args->arg(0)->asString()->evalStr();
                ctx->exitRes.value = &ctx->exitRes.stringLiteral;
                break;
            default:
                ; // noop - just to shut up the compiler
        }
    }
    return &result;
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  wait()

bool CoreVMFunction_wait::acceptsArgUnitType(vmint iArg, StdUnit_t type) const {
    if (iArg == 0)
        return type == VM_NO_UNIT || type == VM_SECOND;
    else
        return type == VM_NO_UNIT;
}

bool CoreVMFunction_wait::acceptsArgUnitPrefix(vmint iArg, StdUnit_t type) const {
    return iArg == 0 && type == VM_SECOND;
}

VMFnResult* CoreVMFunction_wait::exec(VMFnArgs* args) {
    ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
    VMIntExpr* expr = dynamic_cast<VMIntExpr*>(args->arg(0));
    StdUnit_t unit = expr->unitType();
    vmint us = (unit) ? expr->evalInt(VM_MICRO) : expr->evalInt();
    if (us < 0) {
        wrnMsg("wait(): argument may not be negative! Aborting script!");
        this->result.flags = STMT_ABORT_SIGNALLED;
    } else if (us == 0) {
        wrnMsg("wait(): argument may not be zero! Aborting script!");
        this->result.flags = STMT_ABORT_SIGNALLED;
    } else {
        ctx->suspendMicroseconds = us;
        this->result.flags = STMT_SUSPEND_SIGNALLED;
    }
    return &result;
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  abs()

bool CoreVMFunction_abs::acceptsArgType(vmint iArg, ExprType_t type) const {
    return type == INT_EXPR;
}

VMFnResult* CoreVMFunction_abs::exec(VMFnArgs* args) {
    return successResult( ::abs(args->arg(0)->asInt()->evalInt()) );
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  random()

bool CoreVMFunction_random::acceptsArgType(vmint iArg, ExprType_t type) const {
    return type == INT_EXPR;
}

VMFnResult* CoreVMFunction_random::exec(VMFnArgs* args) {
    vmint iMin = args->arg(0)->asInt()->evalInt();
    vmint iMax = args->arg(1)->asInt()->evalInt();
    float f = float(::rand()) / float(RAND_MAX);
    return successResult(
        iMin + roundf( f * float(iMax - iMin) )
    );
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  num_elements()

bool CoreVMFunction_num_elements::acceptsArgType(vmint iArg, ExprType_t type) const {
    return type == INT_ARR_EXPR;
}

VMFnResult* CoreVMFunction_num_elements::exec(VMFnArgs* args) {
    return successResult( args->arg(0)->asIntArray()->arraySize() );
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  inc()

VMFnResult* CoreVMFunction_inc::exec(VMFnArgs* args) {
    VMExpr* arg = args->arg(0);
    VMIntExpr* in = dynamic_cast<VMIntExpr*>(arg);
    VMVariable* out = dynamic_cast<VMVariable*>(arg);
    if (!in || !out) successResult(0);
    vmint i = in->evalInt() + 1;
    IntLiteral tmp(i);
    out->assignExpr(&tmp);
    return successResult(i);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  dec()

VMFnResult* CoreVMFunction_dec::exec(VMFnArgs* args) {
    VMExpr* arg = args->arg(0);
    VMIntExpr* in = dynamic_cast<VMIntExpr*>(arg);
    VMVariable* out = dynamic_cast<VMVariable*>(arg);
    if (!in || !out) successResult(0);
    vmint i = in->evalInt() - 1;
    IntLiteral tmp(i);
    out->assignExpr(&tmp);
    return successResult(i);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  in_range()

VMFnResult* CoreVMFunction_in_range::exec(VMFnArgs* args) {
    vmint i  = args->arg(0)->asInt()->evalInt();
    vmint lo = args->arg(1)->asInt()->evalInt();
    vmint hi = args->arg(2)->asInt()->evalInt();
    if (lo > hi) { // swap lo and hi
        vmint tmp = lo;
        lo = hi;
        hi = tmp;
    }
    return successResult(i >= lo && i <= hi);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  sh_left()

VMFnResult* CoreVMFunction_sh_left::exec(VMFnArgs* args) {
    vmint i = args->arg(0)->asInt()->evalInt();
    vmint n = args->arg(1)->asInt()->evalInt();
    return successResult(i << n);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  sh_right()

VMFnResult* CoreVMFunction_sh_right::exec(VMFnArgs* args) {
    vmint i = args->arg(0)->asInt()->evalInt();
    vmint n = args->arg(1)->asInt()->evalInt();
    return successResult(i >> n);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  min()

VMFnResult* CoreVMFunction_min::exec(VMFnArgs* args) {
    vmint l = args->arg(0)->asInt()->evalInt();
    vmint r = args->arg(1)->asInt()->evalInt();
    return successResult(l < r ? l : r);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  max()

VMFnResult* CoreVMFunction_max::exec(VMFnArgs* args) {
    vmint l = args->arg(0)->asInt()->evalInt();
    vmint r = args->arg(1)->asInt()->evalInt();
    return successResult(l > r ? l : r);
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  array_equal()

VMFnResult* CoreVMFunction_array_equal::exec(VMFnArgs* args) {
    VMIntArrayExpr* l = args->arg(0)->asIntArray();
    VMIntArrayExpr* r = args->arg(1)->asIntArray();
    if (l->arraySize() != r->arraySize()) {
        wrnMsg("array_equal(): the two arrays differ in size");
        return successResult(0); // false
    }
    const vmint n = l->arraySize();
    for (vmint i = 0; i < n; ++i)
        if (l->evalIntElement(i) != r->evalIntElement(i))
            return successResult(0); // false
    return successResult(1); // true
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  search()

ExprType_t CoreVMFunction_search::argType(vmint iArg) const {
    return (iArg == 0) ? INT_ARR_EXPR : INT_EXPR;
}

bool CoreVMFunction_search::acceptsArgType(vmint iArg, ExprType_t type) const {
    if (iArg == 0)
        return type == INT_ARR_EXPR;
    else
        return type == INT_EXPR;
}

VMFnResult* CoreVMFunction_search::exec(VMFnArgs* args) {
    VMIntArrayExpr* a = args->arg(0)->asIntArray();
    const vmint needle = args->arg(1)->asInt()->evalInt();
    const vmint n = a->arraySize();
    for (vmint i = 0; i < n; ++i)
        if (a->evalIntElement(i) == needle)
            return successResult(i);
    return successResult(-1); // not found
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  sort()

ExprType_t CoreVMFunction_sort::argType(vmint iArg) const {
    return (iArg == 0) ? INT_ARR_EXPR : INT_EXPR;
}

bool CoreVMFunction_sort::acceptsArgType(vmint iArg, ExprType_t type) const {
    if (iArg == 0)
        return type == INT_ARR_EXPR;
    else
        return type == INT_EXPR;
}

struct ArrElemPOD {
    VMIntArrayExpr* m_array;
    vmint m_index;
};

static inline void swap(class ArrElemRef a, class ArrElemRef b);

class ArrElemRef : protected ArrElemPOD {
public:
    ArrElemRef() {
        m_array = NULL;
        m_index = 0;
    }
    ArrElemRef(VMIntArrayExpr* a, vmint index) {
        m_array = a;
        m_index = index;
    }
    inline ArrElemRef& operator=(const ArrElemRef& e) {
        setValue(e.getValue());
        return *this;
    }
    inline ArrElemRef& operator=(vmint val) {
        setValue(val);
        return *this;
    }
    inline bool operator==(const ArrElemRef& e) const {
        if (m_index == e.m_index)
            return true;
        return getValue() == e.getValue();
    }
    inline bool operator==(vmint val) const {
        return getValue() == val;
    }
    inline bool operator!=(const ArrElemRef& e) const {
        return !(operator==(e));
    }
    inline bool operator!=(vmint val) const {
        return !(operator==(val));
    }
    inline bool operator<(const ArrElemRef& e) const {
        if (m_index == e.m_index)
            return false;
        return getValue() < e.getValue();
    }
    inline bool operator<(vmint val) const {
        return getValue() < val;
    }
    inline bool operator>(const ArrElemRef& e) const {
        if (m_index == e.m_index)
            return false;
        return getValue() > e.getValue();
    }
    inline bool operator>(vmint val) const {
        return getValue() > val;
    }
    inline bool operator<=(const ArrElemRef& e) const {
        if (m_index == e.m_index)
            return true;
        return getValue() <= e.getValue();
    }
    inline bool operator<=(vmint val) const {
        return getValue() <= val;
    }
    inline bool operator>=(const ArrElemRef& e) const {
        if (m_index == e.m_index)
            return true;
        return getValue() >= e.getValue();
    }
    inline bool operator>=(vmint val) const {
        return getValue() >= val;
    }
    inline operator vmint() const {
        return getValue();
    }
protected:
    inline vmint getValue() const {
        return m_array->evalIntElement(m_index);
    }
    inline void setValue(vmint value) {
        m_array->assignIntElement(m_index, value);
    }

    friend void swap(class ArrElemRef a, class ArrElemRef b);
};

class ArrElemPtr : protected ArrElemPOD {
public:
    ArrElemPtr() {
        m_array = NULL;
        m_index = 0;
    }
    ArrElemPtr(VMIntArrayExpr* a, vmint index) {
        m_array = a;
        m_index = index;
    }
    inline ArrElemRef operator*() {
        return *(ArrElemRef*)this;
    }
};

static inline void swap(ArrElemRef a, ArrElemRef b) {
    vmint valueA = a.getValue();
    vmint valueB = b.getValue();
    a.setValue(valueB);
    b.setValue(valueA);
}

class ArrExprIter : public ArrElemPOD {
public:
    typedef std::random_access_iterator_tag iterator_category;
    typedef vmint value_type;
    typedef ssize_t difference_type;
    typedef ArrElemPtr pointer;
    typedef ArrElemRef reference;

    ArrExprIter(VMIntArrayExpr* a, vmint index) {
        m_array = a;
        m_index = index;
    }
    inline ArrElemRef operator*() {
        return *(ArrElemRef*)this;
    }
    inline ArrExprIter& operator++() { // prefix increment
        ++m_index;
        return *this;
    }
    inline ArrExprIter& operator--() { // prefix decrement
        --m_index;
        return *this;
    }
    inline ArrExprIter operator++(int) { // postfix increment
        ArrExprIter it = *this;
        ++m_index;
        return it;
    }
    inline ArrExprIter operator--(int) { // postfix decrement
        ArrExprIter it = *this;
        --m_index;
        return it;
    }
    inline ArrExprIter& operator+=(difference_type d) {
        m_index += d;
        return *this;
    }
    inline ArrExprIter& operator-=(difference_type d) {
        m_index -= d;
        return *this;
    }
    inline bool operator==(const ArrExprIter& other) const {
        return m_index == other.m_index;
    }
    inline bool operator!=(const ArrExprIter& other) const {
        return m_index != other.m_index;
    }
    inline bool operator<(const ArrExprIter& other) const {
        return m_index < other.m_index;
    }
    inline bool operator>(const ArrExprIter& other) const {
        return m_index > other.m_index;
    }
    inline bool operator<=(const ArrExprIter& other) const {
        return m_index <= other.m_index;
    }
    inline bool operator>=(const ArrExprIter& other) const {
        return m_index >= other.m_index;
    }
    inline difference_type operator+(const ArrExprIter& other) const {
        return m_index + other.m_index;
    }
    inline difference_type operator-(const ArrExprIter& other) const {
        return m_index - other.m_index;
    }
    inline ArrExprIter operator-(difference_type d) const {
        return ArrExprIter(m_array, m_index - d);
    }
    inline ArrExprIter operator+(difference_type d) const {
        return ArrExprIter(m_array, m_index + d);
    }
    inline ArrExprIter operator*(difference_type factor) const {
        return ArrExprIter(m_array, m_index * factor);
    }
};

struct DescArrExprSorter {
    inline bool operator()(const vmint& a, const vmint& b) const {
        return a > b;
    }
};

VMFnResult* CoreVMFunction_sort::exec(VMFnArgs* args) {
    VMIntArrayExpr* a = args->arg(0)->asIntArray();
    bool bAscending =
        (args->argsCount() < 2) ? true : !args->arg(1)->asInt()->evalInt();
    vmint n = a->arraySize();
    ArrExprIter itBegin(a, 0);
    ArrExprIter itEnd(a, n);
    if (bAscending) {
        std::sort(itBegin, itEnd);
    } else {
        DescArrExprSorter sorter;
        std::sort(itBegin, itEnd, sorter);
    }
    return successResult();
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  real_to_int()  and  int()

VMFnResult* CoreVMFunction_real_to_int::exec(VMFnArgs* args) {
    vmfloat f = args->arg(0)->asReal()->evalReal();
    return successResult(vmint(f));
}

///////////////////////////////////////////////////////////////////////////
// built-in script function:  int_to_real()  and  real()

VMFnResult* CoreVMFunction_int_to_real::exec(VMFnArgs* args) {
    vmint i = args->arg(0)->asInt()->evalInt();
    return successResult(i);
}

} // namespace LinuxSampler
1	schoenebeck	2581	/*
2	schoenebeck	3551	* Copyright (c) 2014-2019 Christian Schoenebeck
3	schoenebeck	2581	*
4			* http://www.linuxsampler.org
5			*
6			* This file is part of LinuxSampler and released under the same terms.
7			* See README file for details.
8			*/
9
10			#include "CoreVMFunctions.h"
11
12			#include <iostream>
13	schoenebeck	3221	#include <algorithm> // for std::sort()
14	schoenebeck	2619	#include <math.h>
15			#include <stdlib.h>
16	schoenebeck	2581	#include "tree.h"
17			#include "ScriptVM.h"
18	schoenebeck	3285	#include "../common/RTMath.h"
19	schoenebeck	2581
20			namespace LinuxSampler {
21
22	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
23			// class VMEmptyResultFunction
24
25	schoenebeck	2581	VMFnResult* VMEmptyResultFunction::errorResult() {
26			result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
27			return &result;
28			}
29
30	schoenebeck	2598	VMFnResult* VMEmptyResultFunction::successResult() {
31			result.flags = STMT_SUCCESS;
32			return &result;
33	schoenebeck	2596	}
34
35	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
36			// class VMIntResultFunction
37
38	schoenebeck	3557	VMFnResult* VMIntResultFunction::errorResult(vmint i) {
39	schoenebeck	2598	result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
40			result.value = i;
41			return &result;
42	schoenebeck	2596	}
43
44	schoenebeck	3557	VMFnResult* VMIntResultFunction::successResult(vmint i) {
45	schoenebeck	2581	result.flags = STMT_SUCCESS;
46	schoenebeck	2598	result.value = i;
47	schoenebeck	2581	return &result;
48			}
49
50	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
51	schoenebeck	3573	// class VMRealResultFunction
52
53			VMFnResult* VMRealResultFunction::errorResult(vmfloat f) {
54			result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
55			result.value = f;
56			return &result;
57			}
58
59			VMFnResult* VMRealResultFunction::successResult(vmfloat f) {
60			result.flags = STMT_SUCCESS;
61			result.value = f;
62			return &result;
63			}
64
65			///////////////////////////////////////////////////////////////////////////
66	schoenebeck	2727	// class VMStringResultFunction
67
68	schoenebeck	2581	VMFnResult* VMStringResultFunction::errorResult(const String& s) {
69			result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
70			result.value = s;
71			return &result;
72			}
73
74			VMFnResult* VMStringResultFunction::successResult(const String& s) {
75			result.flags = STMT_SUCCESS;
76			result.value = s;
77			return &result;
78			}
79
80	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
81			// built-in script function: message()
82
83	schoenebeck	3557	bool CoreVMFunction_message::acceptsArgType(vmint iArg, ExprType_t type) const {
84	schoenebeck	3573	return type == INT_EXPR \|\| type == REAL_EXPR \|\| type == STRING_EXPR;
85	schoenebeck	2581	}
86
87			VMFnResult* CoreVMFunction_message::exec(VMFnArgs* args) {
88			if (!args->argsCount()) return errorResult();
89
90	schoenebeck	3285	uint64_t usecs = RTMath::unsafeMicroSeconds(RTMath::real_clock);
91
92	schoenebeck	2581	VMStringExpr* strExpr = dynamic_cast<VMStringExpr*>(args->arg(0));
93			if (strExpr) {
94	schoenebeck	3285	printf("[ScriptVM %.3f] %s\n", usecs/1000000.f, strExpr->evalStr().c_str());
95	schoenebeck	2581	return successResult();
96			}
97
98	schoenebeck	3573	VMRealExpr* realExpr = dynamic_cast<VMRealExpr*>(args->arg(0));
99			if (realExpr) {
100			printf("[ScriptVM %.3f] %f\n", usecs/1000000.f, realExpr->evalReal());
101			return successResult();
102			}
103
104	schoenebeck	2581	VMIntExpr* intExpr = dynamic_cast<VMIntExpr*>(args->arg(0));
105			if (intExpr) {
106	schoenebeck	3557	printf("[ScriptVM %.3f] %lld\n", usecs/1000000.f, (int64_t)intExpr->evalInt());
107	schoenebeck	2581	return successResult();
108			}
109
110			return errorResult();
111			}
112
113	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
114			// built-in script function: exit()
115
116	schoenebeck	3557	vmint CoreVMFunction_exit::maxAllowedArgs() const {
117	schoenebeck	3551	return (vm->isExitResultEnabled()) ? 1 : 0;
118			}
119
120	schoenebeck	3557	bool CoreVMFunction_exit::acceptsArgType(vmint iArg, ExprType_t type) const {
121	schoenebeck	3551	if (!vm->isExitResultEnabled()) return false;
122			return type == INT_EXPR \|\| type == STRING_EXPR;
123			}
124
125	schoenebeck	2581	VMFnResult* CoreVMFunction_exit::exec(VMFnArgs* args) {
126			this->result.flags = STMT_ABORT_SIGNALLED;
127	schoenebeck	3551	if (vm->isExitResultEnabled() && args->argsCount()) {
128			ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
129			switch (args->arg(0)->exprType()) {
130			case INT_EXPR:
131			ctx->exitRes.intLiteral.value = args->arg(0)->asInt()->evalInt();
132			ctx->exitRes.value = &ctx->exitRes.intLiteral;
133			break;
134			case STRING_EXPR:
135			ctx->exitRes.stringLiteral.value = args->arg(0)->asString()->evalStr();
136			ctx->exitRes.value = &ctx->exitRes.stringLiteral;
137			break;
138			default:
139			; // noop - just to shut up the compiler
140			}
141			}
142	schoenebeck	2581	return &result;
143			}
144
145	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
146			// built-in script function: wait()
147
148	schoenebeck	3561	bool CoreVMFunction_wait::acceptsArgUnitType(vmint iArg, StdUnit_t type) const {
149			if (iArg == 0)
150			return type == VM_NO_UNIT \|\| type == VM_SECOND;
151			else
152			return type == VM_NO_UNIT;
153			}
154
155	schoenebeck	3564	bool CoreVMFunction_wait::acceptsArgUnitPrefix(vmint iArg, StdUnit_t type) const {
156			return iArg == 0 && type == VM_SECOND;
157	schoenebeck	3561	}
158
159	schoenebeck	2581	VMFnResult* CoreVMFunction_wait::exec(VMFnArgs* args) {
160			ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
161			VMIntExpr* expr = dynamic_cast<VMIntExpr*>(args->arg(0));
162	schoenebeck	3564	StdUnit_t unit = expr->unitType();
163			vmint us = (unit) ? expr->evalInt(VM_MICRO) : expr->evalInt();
164	schoenebeck	2972	if (us < 0) {
165			wrnMsg("wait(): argument may not be negative! Aborting script!");
166			this->result.flags = STMT_ABORT_SIGNALLED;
167			} else if (us == 0) {
168			wrnMsg("wait(): argument may not be zero! Aborting script!");
169			this->result.flags = STMT_ABORT_SIGNALLED;
170			} else {
171			ctx->suspendMicroseconds = us;
172			this->result.flags = STMT_SUSPEND_SIGNALLED;
173			}
174	schoenebeck	2581	return &result;
175			}
176
177	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
178			// built-in script function: abs()
179
180	schoenebeck	3557	bool CoreVMFunction_abs::acceptsArgType(vmint iArg, ExprType_t type) const {
181	schoenebeck	2619	return type == INT_EXPR;
182			}
183
184			VMFnResult* CoreVMFunction_abs::exec(VMFnArgs* args) {
185			return successResult( ::abs(args->arg(0)->asInt()->evalInt()) );
186			}
187
188	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
189			// built-in script function: random()
190
191	schoenebeck	3557	bool CoreVMFunction_random::acceptsArgType(vmint iArg, ExprType_t type) const {
192	schoenebeck	2619	return type == INT_EXPR;
193			}
194
195			VMFnResult* CoreVMFunction_random::exec(VMFnArgs* args) {
196	schoenebeck	3557	vmint iMin = args->arg(0)->asInt()->evalInt();
197			vmint iMax = args->arg(1)->asInt()->evalInt();
198	schoenebeck	2620	float f = float(::rand()) / float(RAND_MAX);
199	schoenebeck	2619	return successResult(
200			iMin + roundf( f * float(iMax - iMin) )
201			);
202			}
203
204	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
205			// built-in script function: num_elements()
206
207	schoenebeck	3557	bool CoreVMFunction_num_elements::acceptsArgType(vmint iArg, ExprType_t type) const {
208	schoenebeck	2619	return type == INT_ARR_EXPR;
209			}
210
211			VMFnResult* CoreVMFunction_num_elements::exec(VMFnArgs* args) {
212			return successResult( args->arg(0)->asIntArray()->arraySize() );
213			}
214
215	schoenebeck	2945	///////////////////////////////////////////////////////////////////////////
216			// built-in script function: inc()
217
218			VMFnResult* CoreVMFunction_inc::exec(VMFnArgs* args) {
219			VMExpr* arg = args->arg(0);
220			VMIntExpr* in = dynamic_cast<VMIntExpr*>(arg);
221			VMVariable* out = dynamic_cast<VMVariable*>(arg);
222			if (!in \|\| !out) successResult(0);
223	schoenebeck	3557	vmint i = in->evalInt() + 1;
224	schoenebeck	2945	IntLiteral tmp(i);
225			out->assignExpr(&tmp);
226			return successResult(i);
227			}
228
229			///////////////////////////////////////////////////////////////////////////
230			// built-in script function: dec()
231
232			VMFnResult* CoreVMFunction_dec::exec(VMFnArgs* args) {
233			VMExpr* arg = args->arg(0);
234			VMIntExpr* in = dynamic_cast<VMIntExpr*>(arg);
235			VMVariable* out = dynamic_cast<VMVariable*>(arg);
236			if (!in \|\| !out) successResult(0);
237	schoenebeck	3557	vmint i = in->evalInt() - 1;
238	schoenebeck	2945	IntLiteral tmp(i);
239			out->assignExpr(&tmp);
240			return successResult(i);
241			}
242
243	schoenebeck	2965	///////////////////////////////////////////////////////////////////////////
244	schoenebeck	3076	// built-in script function: in_range()
245
246			VMFnResult* CoreVMFunction_in_range::exec(VMFnArgs* args) {
247	schoenebeck	3557	vmint i = args->arg(0)->asInt()->evalInt();
248			vmint lo = args->arg(1)->asInt()->evalInt();
249			vmint hi = args->arg(2)->asInt()->evalInt();
250	schoenebeck	3076	if (lo > hi) { // swap lo and hi
251	schoenebeck	3557	vmint tmp = lo;
252	schoenebeck	3076	lo = hi;
253			hi = tmp;
254			}
255			return successResult(i >= lo && i <= hi);
256			}
257
258			///////////////////////////////////////////////////////////////////////////
259	schoenebeck	2965	// built-in script function: sh_left()
260
261			VMFnResult* CoreVMFunction_sh_left::exec(VMFnArgs* args) {
262	schoenebeck	3557	vmint i = args->arg(0)->asInt()->evalInt();
263			vmint n = args->arg(1)->asInt()->evalInt();
264	schoenebeck	2965	return successResult(i << n);
265			}
266
267			///////////////////////////////////////////////////////////////////////////
268			// built-in script function: sh_right()
269
270			VMFnResult* CoreVMFunction_sh_right::exec(VMFnArgs* args) {
271	schoenebeck	3557	vmint i = args->arg(0)->asInt()->evalInt();
272			vmint n = args->arg(1)->asInt()->evalInt();
273	schoenebeck	2965	return successResult(i >> n);
274			}
275
276	schoenebeck	2970	///////////////////////////////////////////////////////////////////////////
277			// built-in script function: min()
278
279			VMFnResult* CoreVMFunction_min::exec(VMFnArgs* args) {
280	schoenebeck	3557	vmint l = args->arg(0)->asInt()->evalInt();
281			vmint r = args->arg(1)->asInt()->evalInt();
282	schoenebeck	2970	return successResult(l < r ? l : r);
283			}
284
285			///////////////////////////////////////////////////////////////////////////
286			// built-in script function: max()
287
288			VMFnResult* CoreVMFunction_max::exec(VMFnArgs* args) {
289	schoenebeck	3557	vmint l = args->arg(0)->asInt()->evalInt();
290			vmint r = args->arg(1)->asInt()->evalInt();
291	schoenebeck	2970	return successResult(l > r ? l : r);
292			}
293
294	schoenebeck	3221	///////////////////////////////////////////////////////////////////////////
295			// built-in script function: array_equal()
296
297			VMFnResult* CoreVMFunction_array_equal::exec(VMFnArgs* args) {
298			VMIntArrayExpr* l = args->arg(0)->asIntArray();
299			VMIntArrayExpr* r = args->arg(1)->asIntArray();
300			if (l->arraySize() != r->arraySize()) {
301			wrnMsg("array_equal(): the two arrays differ in size");
302			return successResult(0); // false
303			}
304	schoenebeck	3557	const vmint n = l->arraySize();
305			for (vmint i = 0; i < n; ++i)
306	schoenebeck	3221	if (l->evalIntElement(i) != r->evalIntElement(i))
307			return successResult(0); // false
308			return successResult(1); // true
309			}
310
311			///////////////////////////////////////////////////////////////////////////
312			// built-in script function: search()
313
314	schoenebeck	3557	ExprType_t CoreVMFunction_search::argType(vmint iArg) const {
315	schoenebeck	3221	return (iArg == 0) ? INT_ARR_EXPR : INT_EXPR;
316			}
317
318	schoenebeck	3557	bool CoreVMFunction_search::acceptsArgType(vmint iArg, ExprType_t type) const {
319	schoenebeck	3221	if (iArg == 0)
320			return type == INT_ARR_EXPR;
321			else
322			return type == INT_EXPR;
323			}
324
325			VMFnResult* CoreVMFunction_search::exec(VMFnArgs* args) {
326			VMIntArrayExpr* a = args->arg(0)->asIntArray();
327	schoenebeck	3557	const vmint needle = args->arg(1)->asInt()->evalInt();
328			const vmint n = a->arraySize();
329			for (vmint i = 0; i < n; ++i)
330	schoenebeck	3221	if (a->evalIntElement(i) == needle)
331			return successResult(i);
332			return successResult(-1); // not found
333			}
334
335			///////////////////////////////////////////////////////////////////////////
336			// built-in script function: sort()
337
338	schoenebeck	3557	ExprType_t CoreVMFunction_sort::argType(vmint iArg) const {
339	schoenebeck	3221	return (iArg == 0) ? INT_ARR_EXPR : INT_EXPR;
340			}
341
342	schoenebeck	3557	bool CoreVMFunction_sort::acceptsArgType(vmint iArg, ExprType_t type) const {
343	schoenebeck	3221	if (iArg == 0)
344			return type == INT_ARR_EXPR;
345			else
346			return type == INT_EXPR;
347			}
348
349			struct ArrElemPOD {
350			VMIntArrayExpr* m_array;
351	schoenebeck	3557	vmint m_index;
352	schoenebeck	3221	};
353
354	schoenebeck	3222	static inline void swap(class ArrElemRef a, class ArrElemRef b);
355	schoenebeck	3221
356			class ArrElemRef : protected ArrElemPOD {
357			public:
358			ArrElemRef() {
359			m_array = NULL;
360			m_index = 0;
361			}
362	schoenebeck	3557	ArrElemRef(VMIntArrayExpr* a, vmint index) {
363	schoenebeck	3221	m_array = a;
364			m_index = index;
365			}
366			inline ArrElemRef& operator=(const ArrElemRef& e) {
367			setValue(e.getValue());
368			return *this;
369			}
370	schoenebeck	3557	inline ArrElemRef& operator=(vmint val) {
371	schoenebeck	3221	setValue(val);
372			return *this;
373			}
374			inline bool operator==(const ArrElemRef& e) const {
375			if (m_index == e.m_index)
376			return true;
377			return getValue() == e.getValue();
378			}
379	schoenebeck	3557	inline bool operator==(vmint val) const {
380	schoenebeck	3221	return getValue() == val;
381			}
382			inline bool operator!=(const ArrElemRef& e) const {
383			return !(operator==(e));
384			}
385	schoenebeck	3557	inline bool operator!=(vmint val) const {
386	schoenebeck	3221	return !(operator==(val));
387			}
388			inline bool operator<(const ArrElemRef& e) const {
389			if (m_index == e.m_index)
390			return false;
391			return getValue() < e.getValue();
392			}
393	schoenebeck	3557	inline bool operator<(vmint val) const {
394	schoenebeck	3221	return getValue() < val;
395			}
396			inline bool operator>(const ArrElemRef& e) const {
397			if (m_index == e.m_index)
398			return false;
399			return getValue() > e.getValue();
400			}
401	schoenebeck	3557	inline bool operator>(vmint val) const {
402	schoenebeck	3221	return getValue() > val;
403			}
404			inline bool operator<=(const ArrElemRef& e) const {
405			if (m_index == e.m_index)
406			return true;
407			return getValue() <= e.getValue();
408			}
409	schoenebeck	3557	inline bool operator<=(vmint val) const {
410	schoenebeck	3221	return getValue() <= val;
411			}
412			inline bool operator>=(const ArrElemRef& e) const {
413			if (m_index == e.m_index)
414			return true;
415			return getValue() >= e.getValue();
416			}
417	schoenebeck	3557	inline bool operator>=(vmint val) const {
418	schoenebeck	3221	return getValue() >= val;
419			}
420	schoenebeck	3557	inline operator vmint() const {
421	schoenebeck	3221	return getValue();
422			}
423			protected:
424	schoenebeck	3557	inline vmint getValue() const {
425	schoenebeck	3221	return m_array->evalIntElement(m_index);
426			}
427	schoenebeck	3557	inline void setValue(vmint value) {
428	schoenebeck	3221	m_array->assignIntElement(m_index, value);
429			}
430
431	schoenebeck	3222	friend void swap(class ArrElemRef a, class ArrElemRef b);
432	schoenebeck	3221	};
433
434			class ArrElemPtr : protected ArrElemPOD {
435			public:
436			ArrElemPtr() {
437			m_array = NULL;
438			m_index = 0;
439			}
440	schoenebeck	3557	ArrElemPtr(VMIntArrayExpr* a, vmint index) {
441	schoenebeck	3221	m_array = a;
442			m_index = index;
443			}
444			inline ArrElemRef operator*() {
445			return (ArrElemRef)this;
446			}
447			};
448
449	schoenebeck	3222	static inline void swap(ArrElemRef a, ArrElemRef b) {
450	schoenebeck	3557	vmint valueA = a.getValue();
451			vmint valueB = b.getValue();
452	schoenebeck	3221	a.setValue(valueB);
453			b.setValue(valueA);
454			}
455
456			class ArrExprIter : public ArrElemPOD {
457			public:
458			typedef std::random_access_iterator_tag iterator_category;
459	schoenebeck	3557	typedef vmint value_type;
460	schoenebeck	3221	typedef ssize_t difference_type;
461			typedef ArrElemPtr pointer;
462			typedef ArrElemRef reference;
463
464	schoenebeck	3557	ArrExprIter(VMIntArrayExpr* a, vmint index) {
465	schoenebeck	3221	m_array = a;
466			m_index = index;
467			}
468			inline ArrElemRef operator*() {
469			return (ArrElemRef)this;
470			}
471			inline ArrExprIter& operator++() { // prefix increment
472			++m_index;
473			return *this;
474			}
475			inline ArrExprIter& operator--() { // prefix decrement
476			--m_index;
477			return *this;
478			}
479			inline ArrExprIter operator++(int) { // postfix increment
480			ArrExprIter it = *this;
481			++m_index;
482			return it;
483			}
484			inline ArrExprIter operator--(int) { // postfix decrement
485			ArrExprIter it = *this;
486			--m_index;
487			return it;
488			}
489	schoenebeck	3345	inline ArrExprIter& operator+=(difference_type d) {
490			m_index += d;
491			return *this;
492			}
493			inline ArrExprIter& operator-=(difference_type d) {
494			m_index -= d;
495			return *this;
496			}
497	schoenebeck	3221	inline bool operator==(const ArrExprIter& other) const {
498			return m_index == other.m_index;
499			}
500			inline bool operator!=(const ArrExprIter& other) const {
501			return m_index != other.m_index;
502			}
503			inline bool operator<(const ArrExprIter& other) const {
504			return m_index < other.m_index;
505			}
506			inline bool operator>(const ArrExprIter& other) const {
507			return m_index > other.m_index;
508			}
509			inline bool operator<=(const ArrExprIter& other) const {
510			return m_index <= other.m_index;
511			}
512			inline bool operator>=(const ArrExprIter& other) const {
513			return m_index >= other.m_index;
514			}
515			inline difference_type operator+(const ArrExprIter& other) const {
516			return m_index + other.m_index;
517			}
518			inline difference_type operator-(const ArrExprIter& other) const {
519			return m_index - other.m_index;
520			}
521			inline ArrExprIter operator-(difference_type d) const {
522			return ArrExprIter(m_array, m_index - d);
523			}
524			inline ArrExprIter operator+(difference_type d) const {
525			return ArrExprIter(m_array, m_index + d);
526			}
527			inline ArrExprIter operator*(difference_type factor) const {
528			return ArrExprIter(m_array, m_index * factor);
529			}
530			};
531
532			struct DescArrExprSorter {
533	schoenebeck	3557	inline bool operator()(const vmint& a, const vmint& b) const {
534	schoenebeck	3221	return a > b;
535			}
536			};
537
538			VMFnResult* CoreVMFunction_sort::exec(VMFnArgs* args) {
539			VMIntArrayExpr* a = args->arg(0)->asIntArray();
540			bool bAscending =
541			(args->argsCount() < 2) ? true : !args->arg(1)->asInt()->evalInt();
542	schoenebeck	3557	vmint n = a->arraySize();
543	schoenebeck	3221	ArrExprIter itBegin(a, 0);
544			ArrExprIter itEnd(a, n);
545			if (bAscending) {
546			std::sort(itBegin, itEnd);
547			} else {
548			DescArrExprSorter sorter;
549			std::sort(itBegin, itEnd, sorter);
550			}
551			return successResult();
552			}
553
554	schoenebeck	3573	///////////////////////////////////////////////////////////////////////////
555			// built-in script function: real_to_int() and int()
556
557			VMFnResult* CoreVMFunction_real_to_int::exec(VMFnArgs* args) {
558			vmfloat f = args->arg(0)->asReal()->evalReal();
559			return successResult(vmint(f));
560			}
561
562			///////////////////////////////////////////////////////////////////////////
563			// built-in script function: int_to_real() and real()
564
565			VMFnResult* CoreVMFunction_int_to_real::exec(VMFnArgs* args) {
566			vmint i = args->arg(0)->asInt()->evalInt();
567			return successResult(i);
568			}
569
570	schoenebeck	2581	} // namespace LinuxSampler