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
200
|
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "blastem.h"
#include "menu.h"
#include "backend.h"
#include "util.h"
uint16_t menu_read_w(uint32_t address, void * context)
{
//This should return the status of the last request with 0
//meaning either the request is complete or no request is pending
//in the current implementation, the operations happen instantly
//in emulated time so we can always return 0
return 0;
}
int menu_dir_sort(const void *a, const void *b)
{
const dir_entry *da, *db;
da = a;
db = b;
if (da->is_dir != db->is_dir) {
return db->is_dir - da->is_dir;
}
return strcasecmp(((dir_entry *)a)->name, ((dir_entry *)b)->name);
}
void copy_string_from_guest(m68k_context *m68k, uint32_t guest_addr, char *buf, size_t maxchars)
{
char *cur;
char *src = NULL;
for (cur = buf; cur < buf+maxchars; cur+=2, guest_addr+=2, src+=2)
{
if (!src || !(guest_addr & 0xFFFF)) {
//we may have walked off the end of a memory block, get a fresh native pointer
src = get_native_pointer(guest_addr, (void **)m68k->mem_pointers, &m68k->options->gen);
if (!src) {
break;
}
}
*cur = src[1];
cur[1] = *src;
if (!*src || !src[1]) {
break;
}
}
//make sure we terminate the string even if we did not hit a null terminator in the source
buf[maxchars-1] = 0;
}
#ifdef __ANDROID__
#include <SDL.h>
#include <jni.h>
char *get_external_storage_path()
{
static char *ret;
if (ret) {
return ret;
}
JNIEnv *env = SDL_AndroidGetJNIEnv();
if ((*env)->PushLocalFrame(env, 8) < 0) {
return NULL;
}
jclass Environment = (*env)->FindClass(env, "android/os/Environment");
jmethodID getExternalStorageDirectory =
(*env)->GetStaticMethodID(env, Environment, "getExternalStorageDirectory", "()Ljava/io/File;");
jobject file = (*env)->CallStaticObjectMethod(env, Environment, getExternalStorageDirectory);
if (!file) {
goto cleanup;
}
jmethodID getAbsolutePath = (*env)->GetMethodID(env, (*env)->GetObjectClass(env, file),
"getAbsolutePath", "()Ljava/lang/String;");
jstring path = (*env)->CallObjectMethod(env, file, getAbsolutePath);
char const *tmp = (*env)->GetStringUTFChars(env, path, NULL);
ret = strdup(tmp);
(*env)->ReleaseStringUTFChars(env, path, tmp);
cleanup:
(*env)->PopLocalFrame(env, NULL);
return ret;
}
#endif
void * menu_write_w(uint32_t address, void * context, uint16_t value)
{
m68k_context *m68k = context;
genesis_context *gen = m68k->system;
menu_context *menu = gen->extra;
if (!menu) {
gen->extra = menu = calloc(1, sizeof(menu_context));
menu->curpath = tern_find_path(config, "ui\0initial_path\0").ptrval;
if (menu->curpath) {
menu->curpath = strdup(menu->curpath);
} else {
#ifdef __ANDROID__
menu->curpath = strdup(get_external_storage_path());
#else
menu->curpath = strdup(get_home_dir());
#endif
}
}
if (menu->state) {
uint32_t dst = menu->latch << 16 | value;
switch (address >> 2)
{
case 0: {
size_t num_entries;
dir_entry *entries = get_dir_list(menu->curpath, &num_entries);
if (entries) {
qsort(entries, num_entries, sizeof(dir_entry), menu_dir_sort);
}
uint8_t *dest;
for (size_t i = 0; i < num_entries; i++)
{
dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
if (!dest) {
break;
}
*(dest++) = entries[i].is_dir;
*(dest++) = 1;
dst += 2;
uint8_t term = 0;
for (char *cpos = entries[i].name; *cpos; cpos++)
{
dest[1] = *cpos;
dest[0] = cpos[1];
if (cpos[1]) {
cpos++;
} else {
term = 1;
}
dst += 2;
if (!(dst & 0xFFFF)) {
//we may have walked off the end of a memory block, get a fresh native pointer
dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
if (!dest) {
break;
}
} else {
dest += 2;
}
}
if (!term) {
*(dest++) = 0;
*dest = 0;
dst += 2;
}
}
//terminate list
dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
if (dest) {
*dest = dest[1] = 0;
free_dir_list(entries, num_entries);
}
break;
}
case 1: {
char buf[4096];
copy_string_from_guest(m68k, dst, buf, sizeof(buf));
if (!strcmp(buf, "..")) {
size_t len = strlen(menu->curpath);
while (len > 1) {
--len;
if (menu->curpath[len] == '/') {
menu->curpath[len] = 0;
break;
}
}
} else {
char *pieces[] = {menu->curpath, "/", buf};
menu->curpath = alloc_concat_m(3, pieces);
free(pieces[0]);
}
break;
}
case 2: {
char buf[4096];
copy_string_from_guest(m68k, dst, buf, sizeof(buf));
char *pieces[] = {menu->curpath, "/", buf};
gen->next_rom = alloc_concat_m(3, pieces);
m68k->should_return = 1;
break;
}
default:
fprintf(stderr, "WARNING: write to undefined menu port %X\n", address);
}
menu->state = 0;
} else {
menu->latch = value;
menu->state = 1;
}
return context;
}
|
