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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
/*
Simple DirectMedia Layer
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#if defined(__clang_analyzer__) && !defined(SDL_DISABLE_ANALYZE_MACROS)
#define SDL_DISABLE_ANALYZE_MACROS 1
#endif
#include "../SDL_internal.h"
#if defined(__WIN32__) || defined(__WINGDK__)
#include "../core/windows/SDL_windows.h"
#endif
#if defined(__ANDROID__)
#include "../core/android/SDL_android.h"
#endif
#include "SDL_stdinc.h"
#if (defined(__WIN32__) || defined(__WINGDK__)) && (!defined(HAVE_SETENV) || !defined(HAVE_GETENV))
/* Note this isn't thread-safe! */
static char *SDL_envmem = NULL; /* Ugh, memory leak */
static size_t SDL_envmemlen = 0;
#endif
/* Put a variable into the environment */
/* Note: Name may not contain a '=' character. (Reference: http://www.unix.com/man-page/Linux/3/setenv/) */
#if defined(HAVE_SETENV)
int SDL_setenv(const char *name, const char *value, int overwrite)
{
/* Input validation */
if (name == NULL || *name == '\0' || SDL_strchr(name, '=') != NULL || value == NULL) {
return -1;
}
return setenv(name, value, overwrite);
}
#elif defined(__WIN32__) || defined(__WINGDK__)
int SDL_setenv(const char *name, const char *value, int overwrite)
{
/* Input validation */
if (name == NULL || *name == '\0' || SDL_strchr(name, '=') != NULL || value == NULL) {
return -1;
}
if (!overwrite) {
if (GetEnvironmentVariableA(name, NULL, 0) > 0) {
return 0; /* asked not to overwrite existing value. */
}
}
if (!SetEnvironmentVariableA(name, *value ? value : NULL)) {
return -1;
}
return 0;
}
/* We have a real environment table, but no real setenv? Fake it w/ putenv. */
#elif (defined(HAVE_GETENV) && defined(HAVE_PUTENV) && !defined(HAVE_SETENV))
int SDL_setenv(const char *name, const char *value, int overwrite)
{
size_t len;
char *new_variable;
/* Input validation */
if (name == NULL || *name == '\0' || SDL_strchr(name, '=') != NULL || value == NULL) {
return -1;
}
if (getenv(name) != NULL) {
if (overwrite) {
unsetenv(name);
} else {
return 0; /* leave the existing one there. */
}
}
/* This leaks. Sorry. Get a better OS so we don't have to do this. */
len = SDL_strlen(name) + SDL_strlen(value) + 2;
new_variable = (char *)SDL_malloc(len);
if (new_variable == NULL) {
return -1;
}
SDL_snprintf(new_variable, len, "%s=%s", name, value);
return putenv(new_variable);
}
#else /* roll our own */
static char **SDL_env = (char **)0;
int SDL_setenv(const char *name, const char *value, int overwrite)
{
int added;
size_t len, i;
char **new_env;
char *new_variable;
/* Input validation */
if (name == NULL || *name == '\0' || SDL_strchr(name, '=') != NULL || value == NULL) {
return -1;
}
/* See if it already exists */
if (!overwrite && SDL_getenv(name)) {
return 0;
}
/* Allocate memory for the variable */
len = SDL_strlen(name) + SDL_strlen(value) + 2;
new_variable = (char *)SDL_malloc(len);
if (new_variable == NULL) {
return -1;
}
SDL_snprintf(new_variable, len, "%s=%s", name, value);
value = new_variable + SDL_strlen(name) + 1;
name = new_variable;
/* Actually put it into the environment */
added = 0;
i = 0;
if (SDL_env) {
/* Check to see if it's already there... */
len = (value - name);
for (; SDL_env[i]; ++i) {
if (SDL_strncmp(SDL_env[i], name, len) == 0) {
break;
}
}
/* If we found it, just replace the entry */
if (SDL_env[i]) {
SDL_free(SDL_env[i]);
SDL_env[i] = new_variable;
added = 1;
}
}
/* Didn't find it in the environment, expand and add */
if (!added) {
new_env = SDL_realloc(SDL_env, (i + 2) * sizeof(char *));
if (new_env) {
SDL_env = new_env;
SDL_env[i++] = new_variable;
SDL_env[i++] = (char *)0;
added = 1;
} else {
SDL_free(new_variable);
}
}
return added ? 0 : -1;
}
#endif
/* Retrieve a variable named "name" from the environment */
#if defined(HAVE_GETENV)
char *
SDL_getenv(const char *name)
{
#if defined(__ANDROID__)
/* Make sure variables from the application manifest are available */
Android_JNI_GetManifestEnvironmentVariables();
#endif
/* Input validation */
if (name == NULL || *name == '\0') {
return NULL;
}
return getenv(name);
}
#elif defined(__WIN32__) || defined(__WINGDK__)
char *
SDL_getenv(const char *name)
{
size_t bufferlen;
/* Input validation */
if (name == NULL || *name == '\0') {
return NULL;
}
bufferlen =
GetEnvironmentVariableA(name, SDL_envmem, (DWORD)SDL_envmemlen);
if (bufferlen == 0) {
return NULL;
}
if (bufferlen > SDL_envmemlen) {
char *newmem = (char *)SDL_realloc(SDL_envmem, bufferlen);
if (newmem == NULL) {
return NULL;
}
SDL_envmem = newmem;
SDL_envmemlen = bufferlen;
GetEnvironmentVariableA(name, SDL_envmem, (DWORD)SDL_envmemlen);
}
return SDL_envmem;
}
#else
char *
SDL_getenv(const char *name)
{
size_t len, i;
char *value;
/* Input validation */
if (name == NULL || *name == '\0') {
return NULL;
}
value = (char *)0;
if (SDL_env) {
len = SDL_strlen(name);
for (i = 0; SDL_env[i] && value == NULL; ++i) {
if ((SDL_strncmp(SDL_env[i], name, len) == 0) &&
(SDL_env[i][len] == '=')) {
value = &SDL_env[i][len + 1];
}
}
}
return value;
}
#endif
#ifdef TEST_MAIN
#include <stdio.h>
int main(int argc, char *argv[])
{
char *value;
printf("Checking for non-existent variable... ");
fflush(stdout);
if (!SDL_getenv("EXISTS")) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Setting FIRST=VALUE1 in the environment... ");
fflush(stdout);
if (SDL_setenv("FIRST", "VALUE1", 0) == 0) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Getting FIRST from the environment... ");
fflush(stdout);
value = SDL_getenv("FIRST");
if (value && (SDL_strcmp(value, "VALUE1") == 0)) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Setting SECOND=VALUE2 in the environment... ");
fflush(stdout);
if (SDL_setenv("SECOND", "VALUE2", 0) == 0) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Getting SECOND from the environment... ");
fflush(stdout);
value = SDL_getenv("SECOND");
if (value && (SDL_strcmp(value, "VALUE2") == 0)) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Setting FIRST=NOVALUE in the environment... ");
fflush(stdout);
if (SDL_setenv("FIRST", "NOVALUE", 1) == 0) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Getting FIRST from the environment... ");
fflush(stdout);
value = SDL_getenv("FIRST");
if (value && (SDL_strcmp(value, "NOVALUE") == 0)) {
printf("okay\n");
} else {
printf("failed\n");
}
printf("Checking for non-existent variable... ");
fflush(stdout);
if (!SDL_getenv("EXISTS")) {
printf("okay\n");
} else {
printf("failed\n");
}
return 0;
}
#endif /* TEST_MAIN */
/* vi: set ts=4 sw=4 expandtab: */