src/scriptvm/CoreVMFunctions.cpp

/*
 * Copyright (c) 2014-2015 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 <math.h>
#include <stdlib.h>
#include "tree.h"
#include "ScriptVM.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(int i) {
    result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED | STMT_ERROR_OCCURRED);
    result.value = i;
    return &result;
}

VMFnResult* VMIntResultFunction::successResult(int i) {
    result.flags = STMT_SUCCESS;
    result.value = i;
    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(int iArg, ExprType_t type) const {
    return type == INT_EXPR || type == STRING_EXPR;
}

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

    VMStringExpr* strExpr = dynamic_cast<VMStringExpr*>(args->arg(0));
    if (strExpr) {
        std::cout << "[ScriptVM] " << strExpr->evalStr() << "\n";
        return successResult();
    }

    VMIntExpr* intExpr = dynamic_cast<VMIntExpr*>(args->arg(0));
    if (intExpr) {
        std::cout << "[ScriptVM] " << intExpr->evalInt() << "\n";
        return successResult();
    }

    return errorResult();
}

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

VMFnResult* CoreVMFunction_exit::exec(VMFnArgs* args) {
    this->result.flags = STMT_ABORT_SIGNALLED;
    return &result;
}

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

VMFnResult* CoreVMFunction_wait::exec(VMFnArgs* args) {
    ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
    VMIntExpr* expr = dynamic_cast<VMIntExpr*>(args->arg(0));
    ctx->suspendMicroseconds = expr->evalInt();
    this->result.flags = STMT_SUSPEND_SIGNALLED;
    return &result;
}

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

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

VMFnResult* CoreVMFunction_random::exec(VMFnArgs* args) {
    int iMin = args->arg(0)->asInt()->evalInt();
    int 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(int 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);
    int 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);
    int i = in->evalInt() - 1;
    IntLiteral tmp(i);
    out->assignExpr(&tmp);
    return successResult(i);
}

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

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

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

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

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

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

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

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

} // namespace LinuxSampler
1	/*
2	* Copyright (c) 2014-2015 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 <math.h>
14	#include <stdlib.h>
15	#include "tree.h"
16	#include "ScriptVM.h"
17
18	namespace LinuxSampler {
19
20	///////////////////////////////////////////////////////////////////////////
21	// class VMEmptyResultFunction
22
23	VMFnResult* VMEmptyResultFunction::errorResult() {
24	result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
25	return &result;
26	}
27
28	VMFnResult* VMEmptyResultFunction::successResult() {
29	result.flags = STMT_SUCCESS;
30	return &result;
31	}
32
33	///////////////////////////////////////////////////////////////////////////
34	// class VMIntResultFunction
35
36	VMFnResult* VMIntResultFunction::errorResult(int i) {
37	result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
38	result.value = i;
39	return &result;
40	}
41
42	VMFnResult* VMIntResultFunction::successResult(int i) {
43	result.flags = STMT_SUCCESS;
44	result.value = i;
45	return &result;
46	}
47
48	///////////////////////////////////////////////////////////////////////////
49	// class VMStringResultFunction
50
51	VMFnResult* VMStringResultFunction::errorResult(const String& s) {
52	result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
53	result.value = s;
54	return &result;
55	}
56
57	VMFnResult* VMStringResultFunction::successResult(const String& s) {
58	result.flags = STMT_SUCCESS;
59	result.value = s;
60	return &result;
61	}
62
63	///////////////////////////////////////////////////////////////////////////
64	// built-in script function: message()
65
66	bool CoreVMFunction_message::acceptsArgType(int iArg, ExprType_t type) const {
67	return type == INT_EXPR \|\| type == STRING_EXPR;
68	}
69
70	VMFnResult* CoreVMFunction_message::exec(VMFnArgs* args) {
71	if (!args->argsCount()) return errorResult();
72
73	VMStringExpr* strExpr = dynamic_cast<VMStringExpr*>(args->arg(0));
74	if (strExpr) {
75	std::cout << "[ScriptVM] " << strExpr->evalStr() << "\n";
76	return successResult();
77	}
78
79	VMIntExpr* intExpr = dynamic_cast<VMIntExpr*>(args->arg(0));
80	if (intExpr) {
81	std::cout << "[ScriptVM] " << intExpr->evalInt() << "\n";
82	return successResult();
83	}
84
85	return errorResult();
86	}
87
88	///////////////////////////////////////////////////////////////////////////
89	// built-in script function: exit()
90
91	VMFnResult* CoreVMFunction_exit::exec(VMFnArgs* args) {
92	this->result.flags = STMT_ABORT_SIGNALLED;
93	return &result;
94	}
95
96	///////////////////////////////////////////////////////////////////////////
97	// built-in script function: wait()
98
99	VMFnResult* CoreVMFunction_wait::exec(VMFnArgs* args) {
100	ExecContext* ctx = dynamic_cast<ExecContext*>(vm->currentVMExecContext());
101	VMIntExpr* expr = dynamic_cast<VMIntExpr*>(args->arg(0));
102	ctx->suspendMicroseconds = expr->evalInt();
103	this->result.flags = STMT_SUSPEND_SIGNALLED;
104	return &result;
105	}
106
107	///////////////////////////////////////////////////////////////////////////
108	// built-in script function: abs()
109
110	bool CoreVMFunction_abs::acceptsArgType(int iArg, ExprType_t type) const {
111	return type == INT_EXPR;
112	}
113
114	VMFnResult* CoreVMFunction_abs::exec(VMFnArgs* args) {
115	return successResult( ::abs(args->arg(0)->asInt()->evalInt()) );
116	}
117
118	///////////////////////////////////////////////////////////////////////////
119	// built-in script function: random()
120
121	bool CoreVMFunction_random::acceptsArgType(int iArg, ExprType_t type) const {
122	return type == INT_EXPR;
123	}
124
125	VMFnResult* CoreVMFunction_random::exec(VMFnArgs* args) {
126	int iMin = args->arg(0)->asInt()->evalInt();
127	int iMax = args->arg(1)->asInt()->evalInt();
128	float f = float(::rand()) / float(RAND_MAX);
129	return successResult(
130	iMin + roundf( f * float(iMax - iMin) )
131	);
132	}
133
134	///////////////////////////////////////////////////////////////////////////
135	// built-in script function: num_elements()
136
137	bool CoreVMFunction_num_elements::acceptsArgType(int iArg, ExprType_t type) const {
138	return type == INT_ARR_EXPR;
139	}
140
141	VMFnResult* CoreVMFunction_num_elements::exec(VMFnArgs* args) {
142	return successResult( args->arg(0)->asIntArray()->arraySize() );
143	}
144
145	///////////////////////////////////////////////////////////////////////////
146	// built-in script function: inc()
147
148	VMFnResult* CoreVMFunction_inc::exec(VMFnArgs* args) {
149	VMExpr* arg = args->arg(0);
150	VMIntExpr* in = dynamic_cast<VMIntExpr*>(arg);
151	VMVariable* out = dynamic_cast<VMVariable*>(arg);
152	if (!in \|\| !out) successResult(0);
153	int i = in->evalInt() + 1;
154	IntLiteral tmp(i);
155	out->assignExpr(&tmp);
156	return successResult(i);
157	}
158
159	///////////////////////////////////////////////////////////////////////////
160	// built-in script function: dec()
161
162	VMFnResult* CoreVMFunction_dec::exec(VMFnArgs* args) {
163	VMExpr* arg = args->arg(0);
164	VMIntExpr* in = dynamic_cast<VMIntExpr*>(arg);
165	VMVariable* out = dynamic_cast<VMVariable*>(arg);
166	if (!in \|\| !out) successResult(0);
167	int i = in->evalInt() - 1;
168	IntLiteral tmp(i);
169	out->assignExpr(&tmp);
170	return successResult(i);
171	}
172
173	///////////////////////////////////////////////////////////////////////////
174	// built-in script function: sh_left()
175
176	VMFnResult* CoreVMFunction_sh_left::exec(VMFnArgs* args) {
177	int i = args->arg(0)->asInt()->evalInt();
178	int n = args->arg(1)->asInt()->evalInt();
179	return successResult(i << n);
180	}
181
182	///////////////////////////////////////////////////////////////////////////
183	// built-in script function: sh_right()
184
185	VMFnResult* CoreVMFunction_sh_right::exec(VMFnArgs* args) {
186	int i = args->arg(0)->asInt()->evalInt();
187	int n = args->arg(1)->asInt()->evalInt();
188	return successResult(i >> n);
189	}
190
191	///////////////////////////////////////////////////////////////////////////
192	// built-in script function: min()
193
194	VMFnResult* CoreVMFunction_min::exec(VMFnArgs* args) {
195	int l = args->arg(0)->asInt()->evalInt();
196	int r = args->arg(1)->asInt()->evalInt();
197	return successResult(l < r ? l : r);
198	}
199
200	///////////////////////////////////////////////////////////////////////////
201	// built-in script function: max()
202
203	VMFnResult* CoreVMFunction_max::exec(VMFnArgs* args) {
204	int l = args->arg(0)->asInt()->evalInt();
205	int r = args->arg(1)->asInt()->evalInt();
206	return successResult(l > r ? l : r);
207	}
208
209	} // namespace LinuxSampler