1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* cook - file construction tool
* Copyright (C) 1997, 1998, 2006, 2007 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate gosub opcodes
*/
#include <common/error_intl.h>
#include <cook/expr/position.h>
#include <cook/opcode.h>
#include <cook/opcode/context.h>
#include <cook/opcode/gosub.h>
#include <cook/opcode/private.h>
#include <common/str_list.h>
#include <common/trace.h>
typedef struct opcode_gosub_ty opcode_gosub_ty;
struct opcode_gosub_ty
{
opcode_ty inherited;
expr_position_ty pos;
};
static void
destructor(opcode_ty *op)
{
opcode_gosub_ty *this;
this = (opcode_gosub_ty *)op;
expr_position_destructor(&this->pos);
}
/*
* NAME
* execute
*
* SYNOPSIS
* opcode_status_ty execute(opcode_ty *, opcode_context_ty *);
*
* DESCRIPTION
* The execute function is used to execute the given opcode within
* the given interpretation context.
*
* RETURNS
* opcode_status_ty to indicate the result of the execution
*/
static opcode_status_ty
execute(const opcode_ty *op, opcode_context_ty *icp)
{
const opcode_gosub_ty *this;
string_list_ty *value;
int flag;
opcode_status_ty result;
trace(("opcode_gosub::execute()\n{\n"));
this = (const opcode_gosub_ty *)op;
result = opcode_status_success;
value = opcode_context_string_list_pop(icp);
flag = string_list_bool(value);
string_list_delete(value);
if (flag)
{
error_with_position
(
&this->pos,
0,
i18n("function call returned non-zero exit status")
);
result = opcode_status_error;
}
trace(("return %s;\n", opcode_status_name(result)));
trace(("}\n"));
return result;
}
/*
* NAME
* method
*
* DESCRIPTION
* The method variable describes this class.
*
* CAVEAT
* This symbol is not exported from this file.
*/
static opcode_method_ty method =
{
"gosub",
sizeof(opcode_gosub_ty),
destructor,
execute,
execute, /* script */
0, /* disassemble */
};
/*
* NAME
* opcode_gosub_new
*
* SYNOPSIS
* opcode_ty *opcode_gosub_new(void);
*
* DESCRIPTION
* The opcode_gosub_new function is used to allocate a new instance
* of a gosub opcode.
*
* RETURNS
* opcode_ty *; use opcode_delete when you are finished with it.
*/
opcode_ty *
opcode_gosub_new(expr_position_ty *pp)
{
opcode_ty *op;
opcode_gosub_ty *this;
trace(("opcode_gosub_new()\n{\n"));
op = opcode_new(&method);
this = (opcode_gosub_ty *)op;
expr_position_copy_constructor(&this->pos, pp);
trace(("return %08lX;\n", (long)op));
trace(("}\n"));
return op;
}
|