src/stdlib/SDL_getenv.c
author Ozkan Sezer <sezeroz@gmail.com>
Fri, 22 Jun 2018 21:03:40 +0300
branchSDL-1.2
changeset 12026 67f391c74aee
parent 6137 4720145f848b
permissions -rw-r--r--
SDLMain.m: replace CPS* stuff with activateIgnoringOtherApps (bug #4114)

CPS stuff are deprecated and emit warnings at runtime, e.g.:

warning: CPSGetCurrentProcess(): This call is deprecated and should not be called anymore
warning: CPSSetForegroundOperationState() (as above)
warning: capture_display; Captured mirror master 0x350000c1 (unit 1) on behalf of slave 0x042716c0 (unit 0)

http://lists.libsdl.org/pipermail/sdl-libsdl.org/2006-April/055749.html
suggests doing something like:

ProcessSerialNumber psn = { 0, kCurrentProcess};
TransformProcessType (&psn, kProcessTransformToForegroundApplication);
SetFrontProcess (&psn);

And SetFrontProcess() is deprecated in 10.9. Processes.h suggests
[[NSApplication sharedApplication] activateIgnoringOtherApps: YES]
to make one's own application frontmost.
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2012 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 #include "SDL_config.h"
    23 
    24 #include "SDL_stdinc.h"
    25 
    26 #ifndef HAVE_GETENV
    27 
    28 #if defined(__WIN32__) && !defined(_WIN32_WCE) && !defined(__SYMBIAN32__)
    29 
    30 #define WIN32_LEAN_AND_MEAN
    31 #include <windows.h>
    32 
    33 /* Note this isn't thread-safe! */
    34 
    35 static char *SDL_envmem = NULL;	/* Ugh, memory leak */
    36 static size_t SDL_envmemlen = 0;
    37 
    38 /* Put a variable of the form "name=value" into the environment */
    39 int SDL_putenv(const char *variable)
    40 {
    41 	size_t bufferlen;
    42 	char *value;
    43 	const char *sep;
    44 
    45 	sep = SDL_strchr(variable, '=');
    46 	if ( sep == NULL ) {
    47 		return -1;
    48 	}
    49 	bufferlen = SDL_strlen(variable)+1;
    50 	if ( bufferlen > SDL_envmemlen ) {
    51 		char *newmem = (char *)SDL_realloc(SDL_envmem, bufferlen);
    52 		if ( newmem == NULL ) {
    53 			return -1;
    54 		}
    55 		SDL_envmem = newmem;
    56 		SDL_envmemlen = bufferlen;
    57 	}
    58 	SDL_strlcpy(SDL_envmem, variable, bufferlen);
    59 	value = SDL_envmem + (sep - variable);
    60 	*value++ = '\0';
    61 	if ( !SetEnvironmentVariable(SDL_envmem, *value ? value : NULL) ) {
    62 		return -1;
    63 	}
    64 	return 0;
    65 }
    66 
    67 /* Retrieve a variable named "name" from the environment */
    68 char *SDL_getenv(const char *name)
    69 {
    70 	size_t bufferlen;
    71 
    72 	bufferlen = GetEnvironmentVariable(name, SDL_envmem, (DWORD)SDL_envmemlen);
    73 	if ( bufferlen == 0 ) {
    74 		return NULL;
    75 	}
    76 	if ( bufferlen > SDL_envmemlen ) {
    77 		char *newmem = (char *)SDL_realloc(SDL_envmem, bufferlen);
    78 		if ( newmem == NULL ) {
    79 			return NULL;
    80 		}
    81 		SDL_envmem = newmem;
    82 		SDL_envmemlen = bufferlen;
    83 		GetEnvironmentVariable(name, SDL_envmem, (DWORD)SDL_envmemlen);
    84 	}
    85 	return SDL_envmem;
    86 }
    87 
    88 #else /* roll our own */
    89 
    90 static char **SDL_env = (char **)0;
    91 
    92 /* Put a variable of the form "name=value" into the environment */
    93 int SDL_putenv(const char *variable)
    94 {
    95 	const char *name, *value;
    96 	int added;
    97 	int len, i;
    98 	char **new_env;
    99 	char *new_variable;
   100 
   101 	/* A little error checking */
   102 	if ( ! variable ) {
   103 		return(-1);
   104 	}
   105 	name = variable;
   106 	for ( value=variable; *value && (*value != '='); ++value ) {
   107 		/* Keep looking for '=' */ ;
   108 	}
   109 	if ( *value ) {
   110 		++value;
   111 	} else {
   112 		return(-1);
   113 	}
   114 
   115 	/* Allocate memory for the variable */
   116 	new_variable = SDL_strdup(variable);
   117 	if ( ! new_variable ) {
   118 		return(-1);
   119 	}
   120 
   121 	/* Actually put it into the environment */
   122 	added = 0;
   123 	i = 0;
   124 	if ( SDL_env ) {
   125 		/* Check to see if it's already there... */
   126 		len = (value - name);
   127 		for ( ; SDL_env[i]; ++i ) {
   128 			if ( SDL_strncmp(SDL_env[i], name, len) == 0 ) {
   129 				break;
   130 			}
   131 		}
   132 		/* If we found it, just replace the entry */
   133 		if ( SDL_env[i] ) {
   134 			SDL_free(SDL_env[i]);
   135 			SDL_env[i] = new_variable;
   136 			added = 1;
   137 		}
   138 	}
   139 
   140 	/* Didn't find it in the environment, expand and add */
   141 	if ( ! added ) {
   142 		new_env = SDL_realloc(SDL_env, (i+2)*sizeof(char *));
   143 		if ( new_env ) {
   144 			SDL_env = new_env;
   145 			SDL_env[i++] = new_variable;
   146 			SDL_env[i++] = (char *)0;
   147 			added = 1;
   148 		} else {
   149 			SDL_free(new_variable);
   150 		}
   151 	}
   152 	return (added ? 0 : -1);
   153 }
   154 
   155 /* Retrieve a variable named "name" from the environment */
   156 char *SDL_getenv(const char *name)
   157 {
   158 	int len, i;
   159 	char *value;
   160 
   161 	value = (char *)0;
   162 	if ( SDL_env ) {
   163 		len = SDL_strlen(name);
   164 		for ( i=0; SDL_env[i] && !value; ++i ) {
   165 			if ( (SDL_strncmp(SDL_env[i], name, len) == 0) &&
   166 			     (SDL_env[i][len] == '=') ) {
   167 				value = &SDL_env[i][len+1];
   168 			}
   169 		}
   170 	}
   171 	return value;
   172 }
   173 
   174 #endif /* __WIN32__ */
   175 
   176 #endif /* !HAVE_GETENV */
   177 
   178 #ifdef TEST_MAIN
   179 #include <stdio.h>
   180 
   181 int main(int argc, char *argv[])
   182 {
   183 	char *value;
   184 
   185 	printf("Checking for non-existent variable... ");
   186 	fflush(stdout);
   187 	if ( ! SDL_getenv("EXISTS") ) {
   188 		printf("okay\n");
   189 	} else {
   190 		printf("failed\n");
   191 	}
   192 	printf("Setting FIRST=VALUE1 in the environment... ");
   193 	fflush(stdout);
   194 	if ( SDL_putenv("FIRST=VALUE1") == 0 ) {
   195 		printf("okay\n");
   196 	} else {
   197 		printf("failed\n");
   198 	}
   199 	printf("Getting FIRST from the environment... ");
   200 	fflush(stdout);
   201 	value = SDL_getenv("FIRST");
   202 	if ( value && (SDL_strcmp(value, "VALUE1") == 0) ) {
   203 		printf("okay\n");
   204 	} else {
   205 		printf("failed\n");
   206 	}
   207 	printf("Setting SECOND=VALUE2 in the environment... ");
   208 	fflush(stdout);
   209 	if ( SDL_putenv("SECOND=VALUE2") == 0 ) {
   210 		printf("okay\n");
   211 	} else {
   212 		printf("failed\n");
   213 	}
   214 	printf("Getting SECOND from the environment... ");
   215 	fflush(stdout);
   216 	value = SDL_getenv("SECOND");
   217 	if ( value && (SDL_strcmp(value, "VALUE2") == 0) ) {
   218 		printf("okay\n");
   219 	} else {
   220 		printf("failed\n");
   221 	}
   222 	printf("Setting FIRST=NOVALUE in the environment... ");
   223 	fflush(stdout);
   224 	if ( SDL_putenv("FIRST=NOVALUE") == 0 ) {
   225 		printf("okay\n");
   226 	} else {
   227 		printf("failed\n");
   228 	}
   229 	printf("Getting FIRST from the environment... ");
   230 	fflush(stdout);
   231 	value = SDL_getenv("FIRST");
   232 	if ( value && (SDL_strcmp(value, "NOVALUE") == 0) ) {
   233 		printf("okay\n");
   234 	} else {
   235 		printf("failed\n");
   236 	}
   237 	printf("Checking for non-existent variable... ");
   238 	fflush(stdout);
   239 	if ( ! SDL_getenv("EXISTS") ) {
   240 		printf("okay\n");
   241 	} else {
   242 		printf("failed\n");
   243 	}
   244 	return(0);
   245 }
   246 #endif /* TEST_MAIN */
   247