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	/*
2	* Copyright (c) 2014-2019 Christian Schoenebeck
3	*
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	#include <algorithm> // for std::sort()
14	#include <math.h>
15	#include <stdlib.h>
16	#include "tree.h"
17	#include "ScriptVM.h"
18	#include "../common/RTMath.h"
19
20	namespace LinuxSampler {
21
22	///////////////////////////////////////////////////////////////////////////
23	// class VMEmptyResultFunction
24
25	VMFnResult* VMEmptyResultFunction::errorResult() {
26	result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
27	return &result;
28	}
29
30	VMFnResult* VMEmptyResultFunction::successResult() {
31	result.flags = STMT_SUCCESS;
32	return &result;
33	}
34
35	///////////////////////////////////////////////////////////////////////////
36	// class VMIntResultFunction
37
38	VMFnResult* VMIntResultFunction::errorResult(vmint i) {
39	result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
40	result.value = i;
41	return &result;
42	}
43
44	VMFnResult* VMIntResultFunction::successResult(vmint i) {
45	result.flags = STMT_SUCCESS;
46	result.value = i;
47	return &result;
48	}
49
50	///////////////////////////////////////////////////////////////////////////
51	// 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	// class VMStringResultFunction
67
68	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	///////////////////////////////////////////////////////////////////////////
81	// built-in script function: message()
82
83	bool CoreVMFunction_message::acceptsArgType(vmint iArg, ExprType_t type) const {
84	return type == INT_EXPR \|\| type == REAL_EXPR \|\| type == STRING_EXPR;
85	}
86
87	VMFnResult* CoreVMFunction_message::exec(VMFnArgs* args) {
88	if (!args->argsCount()) return errorResult();
89
90	uint64_t usecs = RTMath::unsafeMicroSeconds(RTMath::real_clock);
91
92	VMStringExpr* strExpr = dynamic_cast<VMStringExpr*>(args->arg(0));
93	if (strExpr) {
94	printf("[ScriptVM %.3f] %s\n", usecs/1000000.f, strExpr->evalStr().c_str());
95	return successResult();
96	}
97
98	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	VMIntExpr* intExpr = dynamic_cast<VMIntExpr*>(args->arg(0));
105	if (intExpr) {
106	printf("[ScriptVM %.3f] %lld\n", usecs/1000000.f, (int64_t)intExpr->evalInt());
107	return successResult();
108	}
109
110	return errorResult();
111	}
112
113	///////////////////////////////////////////////////////////////////////////
114	// built-in script function: exit()
115
116	vmint CoreVMFunction_exit::maxAllowedArgs() const {
117	return (vm->isExitResultEnabled()) ? 1 : 0;
118	}
119
120	bool CoreVMFunction_exit::acceptsArgType(vmint iArg, ExprType_t type) const {
121	if (!vm->isExitResultEnabled()) return false;
122	return type == INT_EXPR \|\| type == STRING_EXPR;
123	}
124
125	VMFnResult* CoreVMFunction_exit::exec(VMFnArgs* args) {
126	this->result.flags = STMT_ABORT_SIGNALLED;
127	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	return &result;
143	}
144
145	///////////////////////////////////////////////////////////////////////////
146	// built-in script function: wait()
147
148	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	bool CoreVMFunction_wait::acceptsArgUnitPrefix(vmint iArg, StdUnit_t type) const {
156	return iArg == 0 && type == VM_SECOND;
157	}
158
159	VMFnResult* CoreVMFunction_wait::exec(VMFnArgs* args) {
160	ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
161	VMIntExpr* expr = dynamic_cast<VMIntExpr*>(args->arg(0));
162	StdUnit_t unit = expr->unitType();
163	vmint us = (unit) ? expr->evalInt(VM_MICRO) : expr->evalInt();
164	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	return &result;
175	}
176
177	///////////////////////////////////////////////////////////////////////////
178	// built-in script function: abs()
179
180	bool CoreVMFunction_abs::acceptsArgType(vmint iArg, ExprType_t type) const {
181	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	///////////////////////////////////////////////////////////////////////////
189	// built-in script function: random()
190
191	bool CoreVMFunction_random::acceptsArgType(vmint iArg, ExprType_t type) const {
192	return type == INT_EXPR;
193	}
194
195	VMFnResult* CoreVMFunction_random::exec(VMFnArgs* args) {
196	vmint iMin = args->arg(0)->asInt()->evalInt();
197	vmint iMax = args->arg(1)->asInt()->evalInt();
198	float f = float(::rand()) / float(RAND_MAX);
199	return successResult(
200	iMin + roundf( f * float(iMax - iMin) )
201	);
202	}
203
204	///////////////////////////////////////////////////////////////////////////
205	// built-in script function: num_elements()
206
207	bool CoreVMFunction_num_elements::acceptsArgType(vmint iArg, ExprType_t type) const {
208	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	///////////////////////////////////////////////////////////////////////////
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	vmint i = in->evalInt() + 1;
224	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	vmint i = in->evalInt() - 1;
238	IntLiteral tmp(i);
239	out->assignExpr(&tmp);
240	return successResult(i);
241	}
242
243	///////////////////////////////////////////////////////////////////////////
244	// built-in script function: in_range()
245
246	VMFnResult* CoreVMFunction_in_range::exec(VMFnArgs* args) {
247	vmint i = args->arg(0)->asInt()->evalInt();
248	vmint lo = args->arg(1)->asInt()->evalInt();
249	vmint hi = args->arg(2)->asInt()->evalInt();
250	if (lo > hi) { // swap lo and hi
251	vmint tmp = lo;
252	lo = hi;
253	hi = tmp;
254	}
255	return successResult(i >= lo && i <= hi);
256	}
257
258	///////////////////////////////////////////////////////////////////////////
259	// built-in script function: sh_left()
260
261	VMFnResult* CoreVMFunction_sh_left::exec(VMFnArgs* args) {
262	vmint i = args->arg(0)->asInt()->evalInt();
263	vmint n = args->arg(1)->asInt()->evalInt();
264	return successResult(i << n);
265	}
266
267	///////////////////////////////////////////////////////////////////////////
268	// built-in script function: sh_right()
269
270	VMFnResult* CoreVMFunction_sh_right::exec(VMFnArgs* args) {
271	vmint i = args->arg(0)->asInt()->evalInt();
272	vmint n = args->arg(1)->asInt()->evalInt();
273	return successResult(i >> n);
274	}
275
276	///////////////////////////////////////////////////////////////////////////
277	// built-in script function: min()
278
279	VMFnResult* CoreVMFunction_min::exec(VMFnArgs* args) {
280	vmint l = args->arg(0)->asInt()->evalInt();
281	vmint r = args->arg(1)->asInt()->evalInt();
282	return successResult(l < r ? l : r);
283	}
284
285	///////////////////////////////////////////////////////////////////////////
286	// built-in script function: max()
287
288	VMFnResult* CoreVMFunction_max::exec(VMFnArgs* args) {
289	vmint l = args->arg(0)->asInt()->evalInt();
290	vmint r = args->arg(1)->asInt()->evalInt();
291	return successResult(l > r ? l : r);
292	}
293
294	///////////////////////////////////////////////////////////////////////////
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	const vmint n = l->arraySize();
305	for (vmint i = 0; i < n; ++i)
306	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	ExprType_t CoreVMFunction_search::argType(vmint iArg) const {
315	return (iArg == 0) ? INT_ARR_EXPR : INT_EXPR;
316	}
317
318	bool CoreVMFunction_search::acceptsArgType(vmint iArg, ExprType_t type) const {
319	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	const vmint needle = args->arg(1)->asInt()->evalInt();
328	const vmint n = a->arraySize();
329	for (vmint i = 0; i < n; ++i)
330	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	ExprType_t CoreVMFunction_sort::argType(vmint iArg) const {
339	return (iArg == 0) ? INT_ARR_EXPR : INT_EXPR;
340	}
341
342	bool CoreVMFunction_sort::acceptsArgType(vmint iArg, ExprType_t type) const {
343	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	vmint m_index;
352	};
353
354	static inline void swap(class ArrElemRef a, class ArrElemRef b);
355
356	class ArrElemRef : protected ArrElemPOD {
357	public:
358	ArrElemRef() {
359	m_array = NULL;
360	m_index = 0;
361	}
362	ArrElemRef(VMIntArrayExpr* a, vmint index) {
363	m_array = a;
364	m_index = index;
365	}
366	inline ArrElemRef& operator=(const ArrElemRef& e) {
367	setValue(e.getValue());
368	return *this;
369	}
370	inline ArrElemRef& operator=(vmint val) {
371	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	inline bool operator==(vmint val) const {
380	return getValue() == val;
381	}
382	inline bool operator!=(const ArrElemRef& e) const {
383	return !(operator==(e));
384	}
385	inline bool operator!=(vmint val) const {
386	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	inline bool operator<(vmint val) const {
394	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	inline bool operator>(vmint val) const {
402	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	inline bool operator<=(vmint val) const {
410	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	inline bool operator>=(vmint val) const {
418	return getValue() >= val;
419	}
420	inline operator vmint() const {
421	return getValue();
422	}
423	protected:
424	inline vmint getValue() const {
425	return m_array->evalIntElement(m_index);
426	}
427	inline void setValue(vmint value) {
428	m_array->assignIntElement(m_index, value);
429	}
430
431	friend void swap(class ArrElemRef a, class ArrElemRef b);
432	};
433
434	class ArrElemPtr : protected ArrElemPOD {
435	public:
436	ArrElemPtr() {
437	m_array = NULL;
438	m_index = 0;
439	}
440	ArrElemPtr(VMIntArrayExpr* a, vmint index) {
441	m_array = a;
442	m_index = index;
443	}
444	inline ArrElemRef operator*() {
445	return (ArrElemRef)this;
446	}
447	};
448
449	static inline void swap(ArrElemRef a, ArrElemRef b) {
450	vmint valueA = a.getValue();
451	vmint valueB = b.getValue();
452	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	typedef vmint value_type;
460	typedef ssize_t difference_type;
461	typedef ArrElemPtr pointer;
462	typedef ArrElemRef reference;
463
464	ArrExprIter(VMIntArrayExpr* a, vmint index) {
465	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	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	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	inline bool operator()(const vmint& a, const vmint& b) const {
534	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	vmint n = a->arraySize();
543	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	///////////////////////////////////////////////////////////////////////////
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	} // namespace LinuxSampler