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	schoenebeck	2581	/*
2	schoenebeck	2727	* Copyright (c) 2014-2015 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	2619	#include <math.h>
14			#include <stdlib.h>
15	schoenebeck	2581	#include "tree.h"
16			#include "ScriptVM.h"
17
18			namespace LinuxSampler {
19
20	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
21			// class VMEmptyResultFunction
22
23	schoenebeck	2581	VMFnResult* VMEmptyResultFunction::errorResult() {
24			result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
25			return &result;
26			}
27
28	schoenebeck	2598	VMFnResult* VMEmptyResultFunction::successResult() {
29			result.flags = STMT_SUCCESS;
30			return &result;
31	schoenebeck	2596	}
32
33	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
34			// class VMIntResultFunction
35
36	schoenebeck	2598	VMFnResult* VMIntResultFunction::errorResult(int i) {
37			result.flags = StmtFlags_t(STMT_ABORT_SIGNALLED \| STMT_ERROR_OCCURRED);
38			result.value = i;
39			return &result;
40	schoenebeck	2596	}
41
42	schoenebeck	2598	VMFnResult* VMIntResultFunction::successResult(int i) {
43	schoenebeck	2581	result.flags = STMT_SUCCESS;
44	schoenebeck	2598	result.value = i;
45	schoenebeck	2581	return &result;
46			}
47
48	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
49			// class VMStringResultFunction
50
51	schoenebeck	2581	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	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
64			// built-in script function: message()
65
66	schoenebeck	2581	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	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
89			// built-in script function: exit()
90
91	schoenebeck	2581	VMFnResult* CoreVMFunction_exit::exec(VMFnArgs* args) {
92			this->result.flags = STMT_ABORT_SIGNALLED;
93			return &result;
94			}
95
96	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
97			// built-in script function: wait()
98
99	schoenebeck	2581	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	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
108			// built-in script function: abs()
109
110	schoenebeck	2619	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	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
119			// built-in script function: random()
120
121	schoenebeck	2619	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	schoenebeck	2620	float f = float(::rand()) / float(RAND_MAX);
129	schoenebeck	2619	return successResult(
130			iMin + roundf( f * float(iMax - iMin) )
131			);
132			}
133
134	schoenebeck	2727	///////////////////////////////////////////////////////////////////////////
135			// built-in script function: num_elements()
136
137	schoenebeck	2619	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	schoenebeck	2945	///////////////////////////////////////////////////////////////////////////
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	schoenebeck	2965	///////////////////////////////////////////////////////////////////////////
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	schoenebeck	2970	///////////////////////////////////////////////////////////////////////////
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	schoenebeck	2581	} // namespace LinuxSampler