-
Notifications
You must be signed in to change notification settings - Fork 28
/
gbaconv.c
199 lines (163 loc) · 4.22 KB
/
gbaconv.c
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
192
193
194
195
196
197
198
199
#include <stdint.h>
#include <stdio.h>
#include <getopt.h>
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
enum save_type { EEPROM_512B,
EEPROM_8K,
FLASH_64K,
FLASH_128K,
SAVE_UNKNOWN };
static const char* save_type_to_string(enum save_type type)
{
switch (type) {
case EEPROM_512B:
return "EEPROM 4kbit";
case EEPROM_8K:
return "EEPROM 64kbit";
case FLASH_64K:
return "FLASH 512kbit";
case FLASH_128K:
return "FLASH 1MBit";
default:
return "Unknown type";
}
}
static bool scan_section(const uint8_t* data, unsigned size)
{
for (unsigned i = 0; i < size; i++) {
if (data[i] != 0xff)
return true;
}
return false;
}
static enum save_type detect_save_type(const uint8_t* data, unsigned size)
{
if (size == 512)
return EEPROM_512B;
if (size == 0x2000)
return EEPROM_8K;
if (size == 0x10000)
return FLASH_64K;
if (size == 0x20000)
return FLASH_128K;
if (size == (0x20000 + 0x2000)) {
if (scan_section(data, 0x10000) && !scan_section(data + 0x10000, 0x10000))
return FLASH_64K;
if (scan_section(data, 0x20000))
return FLASH_128K;
if (scan_section(data + 0x20000, 512) && !scan_section(data + 0x20000 + 512, 0x20000 - 512))
return EEPROM_512B;
if (scan_section(data + 0x20000, 0x2000))
return EEPROM_8K;
}
return SAVE_UNKNOWN;
}
static void dump_srm(FILE* file, const uint8_t* data, enum save_type type)
{
void* buf = malloc(0x20000 + 0x2000);
memset(buf, 0xff, 0x20000 + 0x2000);
switch (type) {
case EEPROM_512B:
fwrite(buf, 1, 0x20000, file);
fwrite(data, 1, 512, file);
fwrite(buf, 1, 0x2000 - 512, file);
break;
case EEPROM_8K:
fwrite(buf, 1, 0x20000, file);
fwrite(data, 1, 0x2000, file);
break;
case FLASH_64K:
fwrite(data, 1, 0x10000, file);
fwrite(buf, 1, 0x20000 + 0x2000 - 0x10000, file);
break;
case FLASH_128K:
fwrite(data, 1, 0x20000, file);
fwrite(buf, 1, 0x2000, file);
break;
default:
break;
}
free(buf);
}
static void dump_sav(FILE* file, const uint8_t* data, enum save_type type)
{
switch (type) {
case EEPROM_512B:
fwrite(data + 0x20000, 1, 512, file);
break;
case EEPROM_8K:
fwrite(data + 0x20000, 1, 0x2000, file);
break;
case FLASH_64K:
fwrite(data, 1, 0x10000, file);
break;
case FLASH_128K:
fwrite(data, 1, 0x20000, file);
break;
default:
break;
}
}
// One shot cowboy code :)
int main(int argc, char* argv[])
{
if (argc != 2) {
fprintf(stderr, "Usage: %s <file>\n", argv[0]);
return 1;
}
FILE* file = fopen(argv[1], "rb");
if (!file) {
fprintf(stderr, "Failed to open file \"%s\"\n", argv[1]);
goto error;
}
fseek(file, 0, SEEK_END);
long len = ftell(file);
rewind(file);
uint8_t* buffer = malloc(len);
if (!buffer) {
fprintf(stderr, "Failed to allocate memory!\n");
goto error;
}
fread(buffer, 1, len, file);
fclose(file);
file = NULL;
char* out_path = strdup(argv[1]);
char* split = strrchr(out_path, '.');
const char* ext = NULL;
if (split) {
*split = '\0';
ext = split + 1;
if (strcasecmp(ext, "srm") == 0)
strcat(out_path, ".sav");
else if (strlen(ext) >= 3)
strcat(out_path, ".srm");
else
ext = NULL;
}
if (!ext) {
fprintf(stderr, "Cannot detect extension!\n");
goto error;
}
enum save_type type = detect_save_type(buffer, len);
printf("Detected save type: %s\n", save_type_to_string(type));
if (type == SAVE_UNKNOWN) {
fprintf(stderr, "Cannot infer save type ...\n");
goto error;
}
file = fopen(out_path, "wb");
if (!file)
goto error;
if (len == (0x20000 + 0x2000))
dump_sav(file, buffer, type);
else
dump_srm(file, buffer, type);
fclose(file);
return 0;
error:
if (file)
fclose(file);
return 1;
}