release r2, update credits
[fceu.git] / config.c
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1/* FCE Ultra - NES/Famicom Emulator
2 *
3 * Copyright notice for this file:
4 * Copyright (C) 2002 Ben Parnell
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21/****************************************************************/
22/* FCE Ultra */
23/* */
24/* This file contains routines for reading/writing the */
25/* configuration file. */
26/* */
27/****************************************************************/
28
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#ifdef GP2X
33#include <unistd.h>
34#endif
35
36#include "../../types.h"
37#include "config.h"
38
39static int FReadString(FILE *fp, char *str, int n)
40{
41 int x=0,z;
42 for(;;)
43 {
44 z=fgetc(fp);
45 str[x]=z;
46 x++;
47 if(z<=0) break;
48 if(x>=n) return 0;
49 }
50 if(z<0) return 0;
51 return 1;
52}
53
54static void GetValueR(FILE *fp, char *str, void *v, int c)
55{
56 char buf[256];
57 int s;
58
59 while(FReadString(fp,buf,256))
60 {
61 fread(&s,1,4,fp);
62 if(!strcmp(str, buf))
63 {
64 if(!c) // String, allocate some memory.
65 {
66 if(!(*(char **)v=malloc(s)))
67 goto gogl;
68 fread(*(char **)v,1,s,fp);
69 continue;
70 }
71 else if(s>c || s<c)
72 {
73 gogl:
74 fseek(fp,s,SEEK_CUR);
75 continue;
76 }
77 fread((uint8*)v,1,c,fp);
78 }
79 else
80 fseek(fp,s,SEEK_CUR);
81 }
82 fseek(fp,4,SEEK_SET);
83}
84
85static void SetValueR(FILE *fp, char *str, void *v, int c)
86{
87 fwrite(str,1,strlen(str)+1,fp);
88 fwrite((uint8*)&c,1,4,fp);
89 fwrite((uint8*)v,1,c,fp);
90}
91
92static void SaveParse(CFGSTRUCT *cfgst, FILE *fp)
93{
94 int x=0;
95
96 do
97 {
98 if(!cfgst[x].name) // Link to new config structure
99 {
100 SaveParse(cfgst[x].ptr,fp); // Recursion is sexy. I could
101 // save a little stack space if I made
102 // the file pointer a non-local
103 // variable...
104 x++;
105 continue;
106 }
107
108 if(cfgst[x].len) // Plain data
109 SetValueR(fp,cfgst[x].name,cfgst[x].ptr,cfgst[x].len);
110 else // String
111 if(*(char **)cfgst[x].ptr) // Only save it if there IS a string.
112 SetValueR(fp,cfgst[x].name,*(char **)cfgst[x].ptr,
113 strlen(*(char **)cfgst[x].ptr)+1);
114 x++;
115 } while(cfgst[x].ptr);
116}
117
118int SaveFCEUConfig(char *filename, CFGSTRUCT *cfgst)
119{
120 FILE *fp;
121
122 fp=fopen(filename,"wb");
123 if(fp==NULL) return -1;
124
125 SaveParse(cfgst,fp);
126
127 fclose(fp);
128#ifdef GP2X
129 sync();
130#endif
131 return 0;
132}
133
134static void LoadParse(CFGSTRUCT *cfgst, FILE *fp)
135{
136 int x=0;
137 do
138 {
139 if(!cfgst[x].name) // Link to new config structure
140 {
141 LoadParse(cfgst[x].ptr,fp);
142 x++;
143 continue;
144 }
145 GetValueR(fp,cfgst[x].name,cfgst[x].ptr,cfgst[x].len);
146 x++;
147 } while(cfgst[x].ptr);
148}
149
150int LoadFCEUConfig(char *filename, CFGSTRUCT *cfgst)
151{
152 FILE *fp;
153
154 fp=fopen(filename,"rb");
155 if(fp==NULL) return -1;
156 LoadParse(cfgst,fp);
157 fclose(fp);
158 return 0;
159}