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comparison menu.c @ 866:69a6ec208111

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Menu ROM now pulls real file names from the OS rather than using a fake list
author Michael Pavone <pavone@retrodev.com>
date Fri, 06 Nov 2015 12:19:39 -0800
parents
children 1bab7e01ae98
comparison
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865:305c85c0b954 866:69a6ec208111
1 #include <stdint.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <stdio.h>
5 #include "blastem.h"
6 #include "menu.h"
7 #include "backend.h"
8 #include "util.h"
9
10
11 uint16_t menu_read_w(uint32_t address, void * context)
12 {
13 //This should return the status of the last request with 0
14 //meaning either the request is complete or no request is pending
15 //in the current implementation, the operations happen instantly
16 //in emulated time so we can always return 0
17 return 0;
18 }
19
20 void * menu_write_w(uint32_t address, void * context, uint16_t value)
21 {
22 m68k_context *m68k = context;
23 genesis_context *gen = m68k->system;
24 menu_context *menu = gen->extra;
25 if (!menu) {
26 gen->extra = menu = calloc(1, sizeof(menu_context));
27 menu->curpath = strdup(get_home_dir());
28 }
29 if (menu->state) {
30 uint32_t dst = menu->latch << 16 | value;
31 switch (address >> 2)
32 {
33 case 0: {
34 size_t num_entries;
35 dir_entry *entries = get_dir_list(menu->curpath, &num_entries);
36 for (size_t i = 0; i < num_entries; i++)
37 {
38 uint8_t *dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
39 if (!dest) {
40 break;
41 }
42 *(dest++) = entries[i].is_dir;
43 *(dest++) = 1;
44 dst += 2;
45 uint8_t term = 0;
46 for (char *cpos = entries[i].name; *cpos; cpos++)
47 {
48 dest[1] = *cpos;
49 dest[0] = cpos[1];
50 if (cpos[1]) {
51 cpos++;
52 } else {
53 term = 1;
54 }
55 dst += 2;
56 if (!(dst & 0xFFFF)) {
57 //we may have walked off the end of a memory block, get a fresh native pointer
58 dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
59 if (!dest) {
60 break;
61 }
62 } else {
63 dest += 2;
64 }
65 }
66 if (!term) {
67 *(dest++) = 0;
68 *dest = 0;
69 dst += 2;
70 }
71 }
72 free_dir_list(entries, num_entries);
73 break;
74 }
75 default:
76 fprintf(stderr, "WARNING: write to undefined menu port %X\n", address);
77 }
78 menu->state = 0;
79 } else {
80 menu->latch = value;
81 menu->state = 1;
82 }
83
84 return context;
85 }