Mercurial > sdl-ios-xcode

annotate src/stdlib/SDL_getenv.c @ 4423:7953336267c2

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Disable error checks for reset actuators and set autocenter. Reset actuators and set autocenter might not actually be supported on all implementations. We'll just disable error checking since they aren't critical to neither opening the joystick nor the haptic subsystem.
author Edgar Simo <bobbens@gmail.com>
date Sun, 28 Feb 2010 09:23:23 +0000
parents f7b03b6838cb
children e8916fe9cfc8
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_stdinc.h"
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25
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26 #ifndef HAVE_GETENV
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27
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28 #if defined(__WIN32__) && !defined(_WIN32_WCE)
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29
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30 #define WIN32_LEAN_AND_MEAN
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31 #include <windows.h>
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32
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33 /* Note this isn't thread-safe! */
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34
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35 static char *SDL_envmem = NULL; /* Ugh, memory leak */
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36 static size_t SDL_envmemlen = 0;
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37
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38 /* Put a variable into the environment */
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39 int
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40 SDL_setenv(const char *name, const char *value, int overwrite)
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41 {
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42 if (!overwrite) {
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43 char ch = 0;
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44 const size_t len = GetEnvironmentVariable(name, &ch, sizeof (ch));
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45 if (len > 0) {
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46 return 0; /* asked not to overwrite existing value. */
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47 }
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48 }
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49 if (!SetEnvironmentVariable(name, *value ? value : NULL)) {
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50 return -1;
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51 }
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52 return 0;
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53 }
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54
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55 /* Retrieve a variable named "name" from the environment */
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56 char *
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57 SDL_getenv(const char *name)
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58 {
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59 size_t bufferlen;
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60
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61 bufferlen =
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62 GetEnvironmentVariable(name, SDL_envmem, (DWORD) SDL_envmemlen);
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63 if (bufferlen == 0) {
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64 return NULL;
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65 }
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66 if (bufferlen > SDL_envmemlen) {
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67 char *newmem = (char *) SDL_realloc(SDL_envmem, bufferlen);
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68 if (newmem == NULL) {
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69 return NULL;
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70 }
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71 SDL_envmem = newmem;
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72 SDL_envmemlen = bufferlen;
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73 GetEnvironmentVariable(name, SDL_envmem, (DWORD) SDL_envmemlen);
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74 }
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75 return SDL_envmem;
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76 }
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77
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78 #else /* roll our own */
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79
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80 static char **SDL_env = (char **) 0;
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81
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82 /* Put a variable into the environment */
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83 int
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84 SDL_setenv(const char *name, const char *value, int overwrite)
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85 {
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86 int added;
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87 int len, i;
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88 char **new_env;
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89 char *new_variable;
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90
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91 /* A little error checking */
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92 if (!name || !value) {
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93 return (-1);
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94 }
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95
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96 /* See if it already exists */
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97 if (!overwrite && SDL_getenv(name)) {
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98 return 0;
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99 }
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100
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101 /* Allocate memory for the variable */
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102 len = SDL_strlen(name) + SDL_strlen(value) + 2;
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103 new_variable = (char *) SDL_malloc(len);
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104 if (!new_variable) {
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105 return (-1);
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106 }
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107
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108 SDL_snprintf(new_variable, len, "%s=%s", name, value);
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109 value = new_variable + SDL_strlen(name) + 1;
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110 name = new_variable;
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111
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112 /* Actually put it into the environment */
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113 added = 0;
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114 i = 0;
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115 if (SDL_env) {
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116 /* Check to see if it's already there... */
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117 len = (value - name);
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118 for (; SDL_env[i]; ++i) {
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119 if (SDL_strncmp(SDL_env[i], name, len) == 0) {
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120 break;
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121 }
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122 }
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123 /* If we found it, just replace the entry */
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124 if (SDL_env[i]) {
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125 SDL_free(SDL_env[i]);
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126 SDL_env[i] = new_variable;
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127 added = 1;
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128 }
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129 }
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130
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131 /* Didn't find it in the environment, expand and add */
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132 if (!added) {
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133 new_env = SDL_realloc(SDL_env, (i + 2) * sizeof(char *));
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134 if (new_env) {
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135 SDL_env = new_env;
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136 SDL_env[i++] = new_variable;
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137 SDL_env[i++] = (char *) 0;
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138 added = 1;
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139 } else {
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140 SDL_free(new_variable);
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141 }
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142 }
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143 return (added ? 0 : -1);
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144 }
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145
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146 /* Retrieve a variable named "name" from the environment */
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147 char *
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148 SDL_getenv(const char *name)
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149 {
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diff changeset
150 int len, i;
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151 char *value;
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152
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153 value = (char *) 0;
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154 if (SDL_env) {
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155 len = SDL_strlen(name);
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156 for (i = 0; SDL_env[i] && !value; ++i) {
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157 if ((SDL_strncmp(SDL_env[i], name, len) == 0) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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158 (SDL_env[i][len] == '=')) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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159 value = &SDL_env[i][len + 1];
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160 }
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diff changeset
161 }
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162 }
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163 return value;
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164 }
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165
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166 #endif /* __WIN32__ */
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167
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168 #endif /* !HAVE_GETENV */
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169
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170
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171 /* We have a real environment table, but no real setenv? Fake it w/ putenv. */
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172 #if (defined(HAVE_GETENV) && defined(HAVE_PUTENV) && !defined(HAVE_SETENV))
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173 int
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174 SDL_setenv(const char *name, const char *value, int overwrite)
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175 {
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176 size_t len;
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diff changeset
177 char *new_variable;
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diff changeset
178
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179 if (getenv(name) != NULL) {
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180 if (overwrite) {
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181 unsetenv(name);
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diff changeset
182 } else {
15eea7a1fa97 Implemented SDL_setenv(), moved SDL_putenv() to compat.
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183 return 0; /* leave the existing one there. */
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184 }
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185 }
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186
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187 /* This leaks. Sorry. Get a better OS so we don't have to do this. */
15eea7a1fa97 Implemented SDL_setenv(), moved SDL_putenv() to compat.
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188 len = SDL_strlen(name) + SDL_strlen(value) + 2;
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189 new_variable = (char *) SDL_malloc(len);
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190 if (!new_variable) {
15eea7a1fa97 Implemented SDL_setenv(), moved SDL_putenv() to compat.
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191 return (-1);
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192 }
15eea7a1fa97 Implemented SDL_setenv(), moved SDL_putenv() to compat.
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193
15eea7a1fa97 Implemented SDL_setenv(), moved SDL_putenv() to compat.
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194 SDL_snprintf(new_variable, len, "%s=%s", name, value);
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195 return putenv(new_variable);
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196 }
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197 #endif
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198
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diff changeset
199
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200 #ifdef TEST_MAIN
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201 #include <stdio.h>
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202
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203 int
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204 main(int argc, char *argv[])
1330
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205 {
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206 char *value;
1330
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207
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208 printf("Checking for non-existent variable... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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209 fflush(stdout);
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210 if (!SDL_getenv("EXISTS")) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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211 printf("okay\n");
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212 } else {
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213 printf("failed\n");
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diff changeset
214 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
215 printf("Setting FIRST=VALUE1 in the environment... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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216 fflush(stdout);
3591
db4af3cb938e Updated test code to use SDL_setenv()
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diff changeset
217 if (SDL_setenv("FIRST", "VALUE1", 0) == 0) {
1895
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diff changeset
218 printf("okay\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
219 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
220 printf("failed\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
221 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
222 printf("Getting FIRST from the environment... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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223 fflush(stdout);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
224 value = SDL_getenv("FIRST");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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225 if (value && (SDL_strcmp(value, "VALUE1") == 0)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
226 printf("okay\n");
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diff changeset
227 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
228 printf("failed\n");
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diff changeset
229 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
230 printf("Setting SECOND=VALUE2 in the environment... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
231 fflush(stdout);
3591
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diff changeset
232 if (SDL_setenv("SECOND", "VALUE2", 0) == 0) {
1895
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233 printf("okay\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
234 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
235 printf("failed\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1472
diff changeset
236 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
237 printf("Getting SECOND from the environment... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
238 fflush(stdout);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
239 value = SDL_getenv("SECOND");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
240 if (value && (SDL_strcmp(value, "VALUE2") == 0)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
241 printf("okay\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
242 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
243 printf("failed\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
244 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
245 printf("Setting FIRST=NOVALUE in the environment... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
246 fflush(stdout);
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diff changeset
247 if (SDL_setenv("FIRST", "NOVALUE", 1) == 0) {
1895
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diff changeset
248 printf("okay\n");
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diff changeset
249 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
250 printf("failed\n");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1472
diff changeset
251 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1472
diff changeset
252 printf("Getting FIRST from the environment... ");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
253 fflush(stdout);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1472
diff changeset
254 value = SDL_getenv("FIRST");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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255 if (value && (SDL_strcmp(value, "NOVALUE") == 0)) {
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256 printf("okay\n");
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257 } else {
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258 printf("failed\n");
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259 }
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260 printf("Checking for non-existent variable... ");
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261 fflush(stdout);
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262 if (!SDL_getenv("EXISTS")) {
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263 printf("okay\n");
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264 } else {
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265 printf("failed\n");
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266 }
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267 return (0);
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268 }
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269 #endif /* TEST_MAIN */
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270
1895
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271 /* vi: set ts=4 sw=4 expandtab: */