1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19 */
20 // cvar.c -- dynamic variable tracking
21
22 #include "quakedef.h"
23
24 cvar_t *cvar_vars;
25 char *cvar_null_string = "";
26
27 /*
28 ============
29 Cvar_FindVar
30 ============
31 */
Cvar_FindVar(char * var_name)32 cvar_t *Cvar_FindVar (char *var_name)
33 {
34 cvar_t *var;
35
36 for (var=cvar_vars ; var ; var=var->next)
37 if (!Q_strcmp (var_name, var->name))
38 return var;
39
40 return NULL;
41 }
42
43 /*
44 ============
45 Cvar_VariableValue
46 ============
47 */
Cvar_VariableValue(char * var_name)48 float Cvar_VariableValue (char *var_name)
49 {
50 cvar_t *var;
51
52 var = Cvar_FindVar (var_name);
53 if (!var)
54 return 0;
55 return Q_atof (var->string);
56 }
57
58
59 /*
60 ============
61 Cvar_VariableString
62 ============
63 */
Cvar_VariableString(char * var_name)64 char *Cvar_VariableString (char *var_name)
65 {
66 cvar_t *var;
67
68 var = Cvar_FindVar (var_name);
69 if (!var)
70 return cvar_null_string;
71 return var->string;
72 }
73
74
75 /*
76 ============
77 Cvar_CompleteVariable
78 ============
79 */
Cvar_CompleteVariable(char * partial)80 char *Cvar_CompleteVariable (char *partial)
81 {
82 cvar_t *cvar;
83 int len;
84
85 len = Q_strlen(partial);
86
87 if (!len)
88 return NULL;
89
90 // check functions
91 for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
92 if (!Q_strncmp (partial,cvar->name, len))
93 return cvar->name;
94
95 return NULL;
96 }
97
98
99 /*
100 ============
101 Cvar_Set
102 ============
103 */
Cvar_Set(char * var_name,char * value)104 void Cvar_Set (char *var_name, char *value)
105 {
106 cvar_t *var;
107 qboolean changed;
108
109 var = Cvar_FindVar (var_name);
110 if (!var)
111 { // there is an error in C code if this happens
112 Con_Printf ("Cvar_Set: variable %s not found\n", var_name);
113 return;
114 }
115
116 changed = Q_strcmp(var->string, value);
117
118 Z_Free (var->string); // free the old value string
119
120 var->string = Z_Malloc (Q_strlen(value)+1);
121 Q_strcpy (var->string, value);
122 var->value = Q_atof (var->string);
123 // if (var->server && changed)
124 // {
125 // if (sv.active)
126 // SV_BroadcastPrintf ("\"%s\" changed to \"%s\"\n", var->name, var->string);
127 // }
128 }
129
130 /*
131 ============
132 Cvar_SetValue
133 ============
134 */
Cvar_SetValue(char * var_name,float value)135 void Cvar_SetValue (char *var_name, float value)
136 {
137 char val[32];
138
139 sprintf (val, "%f",value);
140 Cvar_Set (var_name, val);
141 }
142
143
144 /*
145 ============
146 Cvar_RegisterVariable
147
148 Adds a freestanding variable to the variable list.
149 ============
150 */
Cvar_RegisterVariable(cvar_t * variable)151 void Cvar_RegisterVariable (cvar_t *variable)
152 {
153 char *oldstr;
154
155 // first check to see if it has allready been defined
156 if (Cvar_FindVar (variable->name))
157 {
158 Con_Printf ("Can't register variable %s, allready defined\n", variable->name);
159 return;
160 }
161
162 // check for overlap with a command
163 if (Cmd_Exists (variable->name))
164 {
165 Con_Printf ("Cvar_RegisterVariable: %s is a command\n", variable->name);
166 return;
167 }
168
169 // copy the value off, because future sets will Z_Free it
170 oldstr = variable->string;
171 variable->string = Z_Malloc (Q_strlen(variable->string)+1);
172 Q_strcpy (variable->string, oldstr);
173 variable->value = Q_atof (variable->string);
174
175 // link the variable in
176 variable->next = cvar_vars;
177 cvar_vars = variable;
178 }
179
180 /*
181 ============
182 Cvar_Command
183
184 Handles variable inspection and changing from the console
185 ============
186 */
Cvar_Command(void)187 qboolean Cvar_Command (void)
188 {
189 cvar_t *v;
190
191 // check variables
192 v = Cvar_FindVar (Cmd_Argv(0));
193 if (!v)
194 return false;
195
196 // perform a variable print or set
197 if (Cmd_Argc() == 1)
198 {
199 Con_Printf ("\"%s\" is \"%s\"\n", v->name, v->string);
200 return true;
201 }
202
203 Cvar_Set (v->name, Cmd_Argv(1));
204 return true;
205 }
206
207
208 /*
209 ============
210 Cvar_WriteVariables
211
212 Writes lines containing "set variable value" for all variables
213 with the archive flag set to true.
214 ============
215 */
Cvar_WriteVariables(FILE * f)216 void Cvar_WriteVariables (FILE *f)
217 {
218 cvar_t *var;
219
220 for (var = cvar_vars ; var ; var = var->next)
221 if (var->archive)
222 fprintf (f, "%s \"%s\"\n", var->name, var->string);
223 }
224
225