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Fix bug in MED mapper protection bit implementation
author Michael Pavone <pavone@retrodev.com>
date Sun, 28 Apr 2024 23:33:11 -0700
parents 2972a8e16ed2
children
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1 #include <string.h>
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2 #include <stdlib.h>
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3 #include "blastem.h"
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4 #include "util.h"
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5 #include "config.h"
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6 #include "paths.h"
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7 #ifdef _WIN32
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8 #include <windows.h>
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9 #else
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10 #include <unistd.h>
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11 #include <errno.h>
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12 #endif
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13
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14 static char **current_path;
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15
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16 static char *sticky_path_path(void)
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17 {
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18 if (is_config_in_exe_dir(config)) {
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19 return path_append(get_exe_dir(), "sticky_path");
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20 } else {
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21 return path_append(get_config_dir(), "sticky_path");
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22 }
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23 }
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24
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25 static void persist_path(void)
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26 {
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27 char *pathfname = sticky_path_path();
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28 FILE *f = fopen(pathfname, "wb");
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29 if (f) {
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30 if (fwrite(*current_path, 1, strlen(*current_path), f) != strlen(*current_path)) {
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31 warning("Failed to save menu path");
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32 }
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33 fclose(f);
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34 } else {
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35 warning("Failed to save menu path: Could not open %s for writing\n", pathfname);
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36
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37 }
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38 free(pathfname);
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39 }
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40
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41 #ifdef __ANDROID__
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42 #include <SDL.h>
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43 #include <jni.h>
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44 static char *get_external_storage_path()
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45 {
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46 static char *ret;
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47 if (ret) {
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48 return ret;
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49 }
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50 JNIEnv *env = SDL_AndroidGetJNIEnv();
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51 if ((*env)->PushLocalFrame(env, 8) < 0) {
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52 return NULL;
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53 }
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54
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55 jclass Environment = (*env)->FindClass(env, "android/os/Environment");
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56 jmethodID getExternalStorageDirectory =
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57 (*env)->GetStaticMethodID(env, Environment, "getExternalStorageDirectory", "()Ljava/io/File;");
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58 jobject file = (*env)->CallStaticObjectMethod(env, Environment, getExternalStorageDirectory);
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59 if (!file) {
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60 goto cleanup;
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61 }
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62
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63 jmethodID getAbsolutePath = (*env)->GetMethodID(env, (*env)->GetObjectClass(env, file),
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64 "getAbsolutePath", "()Ljava/lang/String;");
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65 jstring path = (*env)->CallObjectMethod(env, file, getAbsolutePath);
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66
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67 char const *tmp = (*env)->GetStringUTFChars(env, path, NULL);
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68 ret = strdup(tmp);
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69 (*env)->ReleaseStringUTFChars(env, path, tmp);
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70
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71 cleanup:
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72 (*env)->PopLocalFrame(env, NULL);
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73 return ret;
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74 }
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75 #endif
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76
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77 void get_initial_browse_path(char **dst)
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78 {
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79 char *base = NULL;
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80 char *remember_path = tern_find_path(config, "ui\0remember_path\0", TVAL_PTR).ptrval;
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81 if (!remember_path || !strcmp("on", remember_path)) {
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82 char *pathfname = sticky_path_path();
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83 FILE *f = fopen(pathfname, "rb");
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84 if (f) {
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85 long pathsize = file_size(f);
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86 if (pathsize > 0) {
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87 base = malloc(pathsize + 1);
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88 if (fread(base, 1, pathsize, f) != pathsize) {
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89 warning("Error restoring saved file browser path");
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90 free(base);
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91 base = NULL;
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92 } else {
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93 base[pathsize] = 0;
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94 }
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95 }
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96 fclose(f);
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97 }
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98 free(pathfname);
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99 if (!current_path) {
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100 atexit(persist_path);
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101 current_path = dst;
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102 }
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103 }
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104 if (!base) {
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105 base = tern_find_path(config, "ui\0initial_path\0", TVAL_PTR).ptrval;
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106 }
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107 if (!base){
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108 #ifdef __ANDROID__
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109 base = get_external_storage_path();
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110 #else
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111 base = "$HOME";
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112 #endif
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113 }
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114 tern_node *vars = tern_insert_ptr(NULL, "HOME", get_home_dir());
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115 vars = tern_insert_ptr(vars, "EXEDIR", get_exe_dir());
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116 *dst = replace_vars(base, vars, 1);
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117 free(base);
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118 tern_free(vars);
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119 }
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120
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121 char *path_append(const char *base, const char *suffix)
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122 {
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123 if (!strcmp(suffix, "..")) {
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124 #ifdef _WIN32
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125 //handle transition from root of a drive to virtual root
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126 if (base[1] == ':' && !base[2]) {
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127 return strdup(PATH_SEP);
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128 }
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129 #endif
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130 size_t len = strlen(base);
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131 while (len > 0) {
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132 --len;
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133 if (is_path_sep(base[len])) {
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134 if (!len) {
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135 //special handling for /
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136 len++;
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137 }
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138 char *ret = malloc(len+1);
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139 memcpy(ret, base, len);
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140 ret[len] = 0;
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141 return ret;
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142 }
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143 }
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144 return strdup(PATH_SEP);
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145 } else {
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146 #ifdef _WIN32
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147 if (base[0] == PATH_SEP[0] && !base[1]) {
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148 //handle transition from virtual root to root of a drive
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149 return strdup(suffix);
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150 }
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151 #endif
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152 if (is_path_sep(base[strlen(base) - 1])) {
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153 return alloc_concat(base, suffix);
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154 } else {
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155 char const *pieces[] = {base, PATH_SEP, suffix};
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156 return alloc_concat_m(3, pieces);
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157 }
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158 }
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159 }
2262
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160
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161 char *path_current_dir(void)
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162 {
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163 size_t size = 128;
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164 char *res = malloc(size);
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165 for (;;) {
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166 #ifdef _WIN32
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167 DWORD actual = GetCurrentDirectoryA(size, res);
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168 if (actual > size) {
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169 res = realloc(res, actual);
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170 size = actual;
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171 } else {
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172 return res;
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173 }
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174 #else
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175 errno = 0;
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176 char *tmp = getcwd(res, size);
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177 if (!tmp) {
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178 if (errno == ERANGE) {
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179 size *= 2;
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180 res = realloc(res, size);
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181 } else {
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182 free(res);
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183 return NULL;
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184 }
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185 } else {
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186 return res;
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187 }
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188 #endif
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189 }
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190 }