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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* GENIUS Calculator
* Copyright (C) 1997-2002 George Lebl
*
* Author: George Lebl
*
* 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 02111-1307,
* USA.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include "calc.h"
#include "mpwrap.h"
#include "eval.h"
#include "dict.h"
#include "util.h"
#include "funclib.h"
#include "matrix.h"
#include "matrixw.h"
#include "matop.h"
#include "compil.h"
#include "utype.h"
typedef struct _UserType UserType;
struct _UserType {
int type;
char *name;
GelUTDestroyFunc destructor;
GelUTCopyFunc copier;
};
static GHashTable *types_ht = NULL;
static GArray *types_ar = NULL;
static int type_cookie = 0;
static void
do_init(void)
{
if(!types_ht)
types_ht = g_hash_table_new(g_str_hash,g_str_equal);
else
types_ar = g_array_new(FALSE,FALSE,sizeof(gpointer));
}
/* make a new unique identifier for a user type and set the destruction
function which is called when a variable of that type is killed */
int
gel_new_user_type(char *name,
GelUTDestroyFunc destructor,
GelUTCopyFunc copier)
{
UserType *ut;
g_return_val_if_fail(name!=NULL,-1);
do_init();
if(g_hash_table_lookup(types_ht,name))
return -1;
ut = g_new0(UserType,1);
ut->type = type_cookie++;
ut->name = g_strdup(name);
ut->destructor = destructor;
ut->copier = copier;
types_ar = g_array_append_val(types_ar,ut);
g_hash_table_insert(types_ht,ut->name,ut);
return ut->type;
}
/* destroy the type itself, not a specific variable */
void
gel_destroy_user_type(int type)
{
UserType *ut;
g_return_if_fail(type<type_cookie);
g_return_if_fail(type>=0);
ut = g_array_index(types_ar,UserType *,type);
if(!ut) return;
g_array_index(types_ar,UserType *,type) = NULL;
g_hash_table_remove(types_ht,ut->name);
g_free(ut->name);
g_free(ut);
}
/* lookup the id of a type */
int
gel_get_user_type(const char *name)
{
UserType *ut;
ut = g_hash_table_lookup (types_ht, name);
if (ut == NULL)
return -1;
else
return ut->type;
}
/* lookup the name of type 'type' */
char *
gel_get_user_type_name(int type)
{
UserType *ut;
g_return_val_if_fail(type<type_cookie,NULL);
g_return_val_if_fail(type>=0,NULL);
ut = g_array_index(types_ar,UserType *,type);
if(!ut) return NULL;
return ut->name;
}
/* make a new variable of type 'type' with data 'data' */
GelETree *
gel_make_new_user_variable(int type, gpointer data)
{
GelETree *n;
UserType *ut;
g_return_val_if_fail(type<type_cookie,NULL);
g_return_val_if_fail(type>=0,NULL);
ut = g_array_index(types_ar,UserType *,type);
if(!ut) return NULL;
GET_NEW_NODE(n);
n->type = USERTYPE_NODE;
n->ut.next = NULL;
n->ut.ttype = ut->type;
n->ut.data = data;
return n;
}
/* free the 'data' of type 'type' using the destructor */
void
gel_free_user_variable_data(int type, gpointer data)
{
UserType *ut;
g_return_if_fail(type<type_cookie);
g_return_if_fail(type>=0);
ut = g_array_index(types_ar,UserType *,type);
if(!ut) return;
if(ut->destructor)
(*ut->destructor)(data);
}
/* copy the 'data' of type 'type' using the copier */
gpointer
gel_copy_user_variable_data(int type, gpointer data)
{
UserType *ut;
g_return_val_if_fail(type<type_cookie,NULL);
g_return_val_if_fail(type>=0,NULL);
ut = g_array_index(types_ar,UserType *,type);
if(!ut) return NULL;
if(ut->copier)
return (*ut->copier)(data);
else
return NULL;
}
|
