src/main/win32/SDL_win32_main.c
author Ryan C. Gordon <icculus@icculus.org>
Sat, 10 Sep 2011 19:37:20 -0400
branchSDL-1.2
changeset 5882 32558685a904
parent 4246 8b8314cc34a6
child 6129 19c7412a6345
permissions -rw-r--r--
Corrected datatype used for LoadLibrary() return value.
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/*
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    SDL_main.c, placed in the public domain by Sam Lantinga  4/13/98
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    The WinMain function -- calls your program's main() function
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#ifdef _WIN32_WCE
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# define DIR_SEPERATOR TEXT("\\")
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# undef _getcwd
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# define _getcwd(str,len)	wcscpy(str,TEXT(""))
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# define setbuf(f,b)
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# define setvbuf(w,x,y,z)
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# define fopen		_wfopen
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# define freopen	_wfreopen
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# define remove(x)	DeleteFile(x)
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#else
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# define DIR_SEPERATOR TEXT("/")
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# include <direct.h>
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#endif
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/* Include the SDL main definition header */
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#include "SDL.h"
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#include "SDL_main.h"
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#ifdef main
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# ifndef _WIN32_WCE_EMULATION
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#  undef main
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# endif /* _WIN32_WCE_EMULATION */
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#endif /* main */
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/* The standard output files */
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#define STDOUT_FILE	TEXT("stdout.txt")
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#define STDERR_FILE	TEXT("stderr.txt")
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/* Set a variable to tell if the stdio redirect has been enabled. */
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static int stdioRedirectEnabled = 0;
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#ifdef _WIN32_WCE
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  static wchar_t stdoutPath[MAX_PATH];
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  static wchar_t stderrPath[MAX_PATH];
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#else
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  static char stdoutPath[MAX_PATH];
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  static char stderrPath[MAX_PATH];
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#endif
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#if defined(_WIN32_WCE) && _WIN32_WCE < 300
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/* seems to be undefined in Win CE although in online help */
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#define isspace(a) (((CHAR)a == ' ') || ((CHAR)a == '\t'))
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#endif /* _WIN32_WCE < 300 */
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static void UnEscapeQuotes( char *arg )
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{
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	char *last = NULL;
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	while( *arg ) {
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		if( *arg == '"' && *last == '\\' ) {
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			char *c_curr = arg;
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			char *c_last = last;
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			while( *c_curr ) {
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				*c_last = *c_curr;
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				c_last = c_curr;
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				c_curr++;
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			}
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			*c_last = '\0';
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		}
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		last = arg;
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		arg++;
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	}
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}
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/* Parse a command line buffer into arguments */
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static int ParseCommandLine(char *cmdline, char **argv)
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{
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	char *bufp;
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	char *lastp = NULL;
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	int argc, last_argc;
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	argc = last_argc = 0;
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	for ( bufp = cmdline; *bufp; ) {
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		/* Skip leading whitespace */
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		while ( isspace(*bufp) ) {
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			++bufp;
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		}
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		/* Skip over argument */
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		if ( *bufp == '"' ) {
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			++bufp;
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			if ( *bufp ) {
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				if ( argv ) {
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					argv[argc] = bufp;
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				}
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				++argc;
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			}
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			/* Skip over word */
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			while ( *bufp && ( *bufp != '"' || *lastp == '\\' ) ) {
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				lastp = bufp;
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				++bufp;
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			}
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		} else {
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			if ( *bufp ) {
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				if ( argv ) {
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					argv[argc] = bufp;
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				}
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				++argc;
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			}
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			/* Skip over word */
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			while ( *bufp && ! isspace(*bufp) ) {
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				++bufp;
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			}
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		}
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		if ( *bufp ) {
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			if ( argv ) {
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				*bufp = '\0';
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			}
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			++bufp;
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		}
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		/* Strip out \ from \" sequences */
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		if( argv && last_argc != argc ) {
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			UnEscapeQuotes( argv[last_argc] );	
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		}
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		last_argc = argc;	
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	}
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	if ( argv ) {
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		argv[argc] = NULL;
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	}
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	return(argc);
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}
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/* Show an error message */
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static void ShowError(const char *title, const char *message)
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{
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/* If USE_MESSAGEBOX is defined, you need to link with user32.lib */
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#ifdef USE_MESSAGEBOX
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	MessageBox(NULL, message, title, MB_ICONEXCLAMATION|MB_OK);
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#else
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	fprintf(stderr, "%s: %s\n", title, message);
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#endif
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}
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/* Pop up an out of memory message, returns to Windows */
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static BOOL OutOfMemory(void)
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{
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	ShowError("Fatal Error", "Out of memory - aborting");
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	return FALSE;
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}
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/* SDL_Quit() shouldn't be used with atexit() directly because
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   calling conventions may differ... */
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static void cleanup(void)
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{
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	SDL_Quit();
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}
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/* Remove the output files if there was no output written */
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static void cleanup_output(void) {
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	FILE *file;
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	int empty;
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	/* Flush the output in case anything is queued */
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	fclose(stdout);
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	fclose(stderr);
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	/* Without redirection we're done */
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	if (!stdioRedirectEnabled) {
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		return;
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	}
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	/* See if the files have any output in them */
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	if ( stdoutPath[0] ) {
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		file = fopen(stdoutPath, TEXT("rb"));
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		if ( file ) {
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			empty = (fgetc(file) == EOF) ? 1 : 0;
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			fclose(file);
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			if ( empty ) {
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				remove(stdoutPath);
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			}
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		}
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	}
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	if ( stderrPath[0] ) {
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		file = fopen(stderrPath, TEXT("rb"));
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		if ( file ) {
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			empty = (fgetc(file) == EOF) ? 1 : 0;
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			fclose(file);
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			if ( empty ) {
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				remove(stderrPath);
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			}
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		}
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	}
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}
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/* Redirect the output (stdout and stderr) to a file */
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static void redirect_output(void)
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{
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	DWORD pathlen;
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#ifdef _WIN32_WCE
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	wchar_t path[MAX_PATH];
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#else
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	char path[MAX_PATH];
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#endif
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	FILE *newfp;
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	pathlen = GetModuleFileName(NULL, path, SDL_arraysize(path));
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	while ( pathlen > 0 && path[pathlen] != '\\' ) {
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		--pathlen;
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	}
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	path[pathlen] = '\0';
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#ifdef _WIN32_WCE
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	wcsncpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
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	wcsncat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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#else
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	SDL_strlcpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
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	SDL_strlcat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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#endif
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	/* Redirect standard input and standard output */
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	newfp = freopen(stdoutPath, TEXT("w"), stdout);
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#ifndef _WIN32_WCE
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	if ( newfp == NULL ) {	/* This happens on NT */
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#if !defined(stdout)
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		stdout = fopen(stdoutPath, TEXT("w"));
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#else
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		newfp = fopen(stdoutPath, TEXT("w"));
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		if ( newfp ) {
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			*stdout = *newfp;
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		}
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#endif
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	}
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#endif /* _WIN32_WCE */
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#ifdef _WIN32_WCE
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	wcsncpy( stderrPath, path, SDL_arraysize(stdoutPath) );
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	wcsncat( stderrPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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#else
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	SDL_strlcpy( stderrPath, path, SDL_arraysize(stderrPath) );
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	SDL_strlcat( stderrPath, DIR_SEPERATOR STDERR_FILE, SDL_arraysize(stderrPath) );
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#endif
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	newfp = freopen(stderrPath, TEXT("w"), stderr);
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#ifndef _WIN32_WCE
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	if ( newfp == NULL ) {	/* This happens on NT */
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#if !defined(stderr)
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		stderr = fopen(stderrPath, TEXT("w"));
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#else
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		newfp = fopen(stderrPath, TEXT("w"));
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		if ( newfp ) {
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			*stderr = *newfp;
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		}
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#endif
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	}
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#endif /* _WIN32_WCE */
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	setvbuf(stdout, NULL, _IOLBF, BUFSIZ);	/* Line buffered */
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	setbuf(stderr, NULL);			/* No buffering */
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	stdioRedirectEnabled = 1;
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}
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#if defined(_MSC_VER) && !defined(_WIN32_WCE)
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/* The VC++ compiler needs main defined */
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#define console_main main
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#endif
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/* This is where execution begins [console apps] */
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int console_main(int argc, char *argv[])
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{
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	size_t n;
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	char *bufp, *appname;
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	int status;
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	/* Get the class name from argv[0] */
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	appname = argv[0];
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	if ( (bufp=SDL_strrchr(argv[0], '\\')) != NULL ) {
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		appname = bufp+1;
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	} else
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	if ( (bufp=SDL_strrchr(argv[0], '/')) != NULL ) {
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		appname = bufp+1;
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	}
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	if ( (bufp=SDL_strrchr(appname, '.')) == NULL )
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		n = SDL_strlen(appname);
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	else
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		n = (bufp-appname);
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	bufp = SDL_stack_alloc(char, n+1);
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	if ( bufp == NULL ) {
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		return OutOfMemory();
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	}
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	SDL_strlcpy(bufp, appname, n+1);
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	appname = bufp;
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	/* Load SDL dynamic link library */
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	if ( SDL_Init(SDL_INIT_NOPARACHUTE) < 0 ) {
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		ShowError("WinMain() error", SDL_GetError());
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		return(FALSE);
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	}
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	atexit(cleanup_output);
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	atexit(cleanup);
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	/* Sam:
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	   We still need to pass in the application handle so that
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	   DirectInput will initialize properly when SDL_RegisterApp()
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	   is called later in the video initialization.
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	 */
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	SDL_SetModuleHandle(GetModuleHandle(NULL));
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	/* Run the application main() code */
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	status = SDL_main(argc, argv);
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   316
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	/* Exit cleanly, calling atexit() functions */
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	exit(status);
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	/* Hush little compiler, don't you cry... */
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	return 0;
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}
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/* This is where execution begins [windowed apps] */
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#ifdef _WIN32_WCE
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int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPWSTR szCmdLine, int sw)
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#else
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int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
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#endif
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{
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	HMODULE handle;
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	char **argv;
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	int argc;
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	char *cmdline;
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	char *env_str;
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#ifdef _WIN32_WCE
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	wchar_t *bufp;
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	int nLen;
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#else
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	char *bufp;
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	size_t nLen;
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#endif
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	/* Start up DDHELP.EXE before opening any files, so DDHELP doesn't
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	   keep them open.  This is a hack.. hopefully it will be fixed 
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	   someday.  DDHELP.EXE starts up the first time DDRAW.DLL is loaded.
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	 */
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	handle = LoadLibrary(TEXT("DDRAW.DLL"));
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	if ( handle != NULL ) {
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		FreeLibrary(handle);
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	}
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	/* Check for stdio redirect settings and do the redirection */
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	if ((env_str = SDL_getenv("SDL_STDIO_REDIRECT"))) {
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		if (SDL_atoi(env_str)) {
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   356
			redirect_output();
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		}
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   358
	}
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   359
#ifndef NO_STDIO_REDIRECT
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   360
	else {
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   361
		redirect_output();
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   362
	}
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#endif
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   364
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   365
#ifdef _WIN32_WCE
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	nLen = wcslen(szCmdLine)+128+1;
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   367
	bufp = SDL_stack_alloc(wchar_t, nLen*2);
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	wcscpy (bufp, TEXT("\""));
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   369
	GetModuleFileName(NULL, bufp+1, 128-3);
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   370
	wcscpy (bufp+wcslen(bufp), TEXT("\" "));
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   371
	wcsncpy(bufp+wcslen(bufp), szCmdLine,nLen-wcslen(bufp));
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   372
	nLen = wcslen(bufp)+1;
1465
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   373
	cmdline = SDL_stack_alloc(char, nLen);
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   374
	if ( cmdline == NULL ) {
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   375
		return OutOfMemory();
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   376
	}
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   377
	WideCharToMultiByte(CP_ACP, 0, bufp, -1, cmdline, nLen, NULL, NULL);
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   378
#else
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   379
	/* Grab the command line */
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   380
	bufp = GetCommandLine();
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   381
	nLen = SDL_strlen(bufp)+1;
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   382
	cmdline = SDL_stack_alloc(char, nLen);
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   383
	if ( cmdline == NULL ) {
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   384
		return OutOfMemory();
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   385
	}
1379
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   386
	SDL_strlcpy(cmdline, bufp, nLen);
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   387
#endif
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   388
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   389
	/* Parse it into argv and argc */
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   390
	argc = ParseCommandLine(cmdline, NULL);
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   391
	argv = SDL_stack_alloc(char*, argc+1);
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   392
	if ( argv == NULL ) {
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   393
		return OutOfMemory();
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   394
	}
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   395
	ParseCommandLine(cmdline, argv);
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   396
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   397
	/* Run the main program (after a little SDL initialization) */
1423
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   398
	console_main(argc, argv);
1379
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diff changeset
   399
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   400
	/* Hush little compiler, don't you cry... */
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diff changeset
   401
	return 0;
754
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   402
}