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