annotate src/main/win32/SDL_win32_main.c @ 1484:b2b476a4a73c

Added documentation on how to build a completely useless SDL library. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 08 Mar 2006 08:30:17 +0000
parents 4aac8563c296
children 14717b52abc0
rev   line source
754
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1 /*
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2 SDL_main.c, placed in the public domain by Sam Lantinga 4/13/98
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3
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4 The WinMain function -- calls your program's main() function
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9
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10 #define WIN32_LEAN_AND_MEAN
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11 #include <windows.h>
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12
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13 #ifdef _WIN32_WCE
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14 # define DIR_SEPERATOR TEXT("\\")
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15 # undef _getcwd
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16 # define _getcwd(str,len) wcscpy(str,TEXT(""))
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17 # define setbuf(f,b)
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18 # define setvbuf(w,x,y,z)
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19 # define fopen _wfopen
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20 # define freopen _wfreopen
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21 # define remove(x) DeleteFile(x)
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22 #else
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23 # define DIR_SEPERATOR TEXT("/")
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24 # include <direct.h>
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25 #endif
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26
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27 /* Include the SDL main definition header */
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28 #include "SDL.h"
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29 #include "SDL_main.h"
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30
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31 #ifdef main
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32 # ifndef _WIN32_WCE_EMULATION
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33 # undef main
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34 # endif /* _WIN32_WCE_EMULATION */
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35 #endif /* main */
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36
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37 /* The standard output files */
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38 #define STDOUT_FILE TEXT("stdout.txt")
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39 #define STDERR_FILE TEXT("stderr.txt")
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40
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41 #ifndef NO_STDIO_REDIRECT
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42 # ifdef _WIN32_WCE
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43 static wchar_t stdoutPath[MAX_PATH];
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44 static wchar_t stderrPath[MAX_PATH];
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45 # else
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46 static char stdoutPath[MAX_PATH];
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47 static char stderrPath[MAX_PATH];
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48 # endif
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49 #endif
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50
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51 #if defined(_WIN32_WCE) && _WIN32_WCE < 300
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52 /* seems to be undefined in Win CE although in online help */
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53 #define isspace(a) (((CHAR)a == ' ') || ((CHAR)a == '\t'))
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54 #endif /* _WIN32_WCE < 300 */
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55
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56 /* Parse a command line buffer into arguments */
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57 static int ParseCommandLine(char *cmdline, char **argv)
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58 {
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59 char *bufp;
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60 int argc;
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61
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62 argc = 0;
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63 for ( bufp = cmdline; *bufp; ) {
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64 /* Skip leading whitespace */
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65 while ( isspace(*bufp) ) {
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66 ++bufp;
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67 }
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68 /* Skip over argument */
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69 if ( *bufp == '"' ) {
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70 ++bufp;
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71 if ( *bufp ) {
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72 if ( argv ) {
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73 argv[argc] = bufp;
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74 }
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75 ++argc;
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76 }
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77 /* Skip over word */
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78 while ( *bufp && (*bufp != '"') ) {
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79 ++bufp;
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80 }
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81 } else {
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82 if ( *bufp ) {
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83 if ( argv ) {
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84 argv[argc] = bufp;
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85 }
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86 ++argc;
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87 }
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88 /* Skip over word */
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89 while ( *bufp && ! isspace(*bufp) ) {
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90 ++bufp;
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91 }
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92 }
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93 if ( *bufp ) {
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94 if ( argv ) {
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95 *bufp = '\0';
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96 }
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97 ++bufp;
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98 }
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99 }
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100 if ( argv ) {
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101 argv[argc] = NULL;
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102 }
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103 return(argc);
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104 }
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105
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106 /* Show an error message */
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107 static void ShowError(const char *title, const char *message)
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108 {
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109 /* If USE_MESSAGEBOX is defined, you need to link with user32.lib */
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110 #ifdef USE_MESSAGEBOX
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111 MessageBox(NULL, message, title, MB_ICONEXCLAMATION|MB_OK);
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112 #else
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113 fprintf(stderr, "%s: %s\n", title, message);
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114 #endif
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115 }
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116
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117 /* Pop up an out of memory message, returns to Windows */
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118 static BOOL OutOfMemory(void)
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119 {
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120 ShowError("Fatal Error", "Out of memory - aborting");
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121 return FALSE;
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122 }
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123
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124 /* Remove the output files if there was no output written */
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125 static void __cdecl cleanup_output(void)
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126 {
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127 #ifndef NO_STDIO_REDIRECT
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128 FILE *file;
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129 int empty;
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130 #endif
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131
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132 /* Flush the output in case anything is queued */
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133 fclose(stdout);
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134 fclose(stderr);
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135
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136 #ifndef NO_STDIO_REDIRECT
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137 /* See if the files have any output in them */
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138 if ( stdoutPath[0] ) {
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139 file = fopen(stdoutPath, TEXT("rb"));
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140 if ( file ) {
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141 empty = (fgetc(file) == EOF) ? 1 : 0;
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142 fclose(file);
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143 if ( empty ) {
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144 remove(stdoutPath);
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145 }
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146 }
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147 }
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148 if ( stderrPath[0] ) {
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149 file = fopen(stderrPath, TEXT("rb"));
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150 if ( file ) {
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151 empty = (fgetc(file) == EOF) ? 1 : 0;
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152 fclose(file);
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153 if ( empty ) {
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154 remove(stderrPath);
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155 }
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156 }
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157 }
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158 #endif
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159 }
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160
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161 #if defined(_MSC_VER) && !defined(_WIN32_WCE)
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162 /* The VC++ compiler needs main defined */
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163 #define console_main main
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164 #endif
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165
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166 /* This is where execution begins [console apps] */
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167 int console_main(int argc, char *argv[])
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168 {
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169 size_t n;
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170 char *bufp, *appname;
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171 int status;
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172
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173 /* Get the class name from argv[0] */
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174 appname = argv[0];
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175 if ( (bufp=SDL_strrchr(argv[0], '\\')) != NULL ) {
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176 appname = bufp+1;
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177 } else
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178 if ( (bufp=SDL_strrchr(argv[0], '/')) != NULL ) {
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179 appname = bufp+1;
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180 }
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181
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182 if ( (bufp=SDL_strrchr(appname, '.')) == NULL )
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183 n = SDL_strlen(appname);
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184 else
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185 n = (bufp-appname);
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186
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187 bufp = SDL_stack_alloc(char, n+1);
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188 if ( bufp == NULL ) {
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189 return OutOfMemory();
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190 }
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191 SDL_strlcpy(bufp, appname, n);
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192 appname = bufp;
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193
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194 /* Load SDL dynamic link library */
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195 if ( SDL_Init(SDL_INIT_NOPARACHUTE) < 0 ) {
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196 ShowError("WinMain() error", SDL_GetError());
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197 return(FALSE);
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198 }
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199 atexit(cleanup_output);
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200 atexit(SDL_Quit);
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201
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202 /* Sam:
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203 We still need to pass in the application handle so that
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204 DirectInput will initialize properly when SDL_RegisterApp()
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205 is called later in the video initialization.
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206 */
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207 SDL_SetModuleHandle(GetModuleHandle(NULL));
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208
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209 /* Run the application main() code */
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210 status = SDL_main(argc, argv);
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211
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212 /* Exit cleanly, calling atexit() functions */
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213 exit(status);
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214
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215 /* Hush little compiler, don't you cry... */
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216 return 0;
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217 }
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218
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219 /* This is where execution begins [windowed apps] */
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220 #ifdef _WIN32_WCE
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221 int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPWSTR szCmdLine, int sw)
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222 #else
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223 int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
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224 #endif
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225 {
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226 HINSTANCE handle;
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227 char **argv;
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228 int argc;
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229 char *cmdline;
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230 DWORD pathlen;
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231 #ifdef _WIN32_WCE
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232 wchar_t path[MAX_PATH];
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233 #else
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234 char path[MAX_PATH];
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235 #endif
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236 #ifdef _WIN32_WCE
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237 wchar_t *bufp;
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238 int nLen;
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239 #else
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240 char *bufp;
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241 size_t nLen;
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242 #endif
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243 #ifndef NO_STDIO_REDIRECT
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244 FILE *newfp;
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245 #endif
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246
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247 /* Start up DDHELP.EXE before opening any files, so DDHELP doesn't
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248 keep them open. This is a hack.. hopefully it will be fixed
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249 someday. DDHELP.EXE starts up the first time DDRAW.DLL is loaded.
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250 */
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251 handle = LoadLibrary(TEXT("DDRAW.DLL"));
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252 if ( handle != NULL ) {
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253 FreeLibrary(handle);
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254 }
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255
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256 #ifndef NO_STDIO_REDIRECT
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257 pathlen = GetModuleFileName(NULL, path, SDL_arraysize(path));
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258 while ( pathlen > 0 && path[pathlen] != '\\' ) {
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259 --pathlen;
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260 }
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261 path[pathlen] = '\0';
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262
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263 #ifdef _WIN32_WCE
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264 wcsncpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
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265 wcsncat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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266 #else
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267 SDL_strlcpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
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268 SDL_strlcat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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269 #endif
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270
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271 /* Redirect standard input and standard output */
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272 newfp = freopen(stdoutPath, TEXT("w"), stdout);
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273
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274 #ifndef _WIN32_WCE
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275 if ( newfp == NULL ) { /* This happens on NT */
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276 #if !defined(stdout)
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277 stdout = fopen(stdoutPath, TEXT("w"));
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278 #else
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279 newfp = fopen(stdoutPath, TEXT("w"));
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280 if ( newfp ) {
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281 *stdout = *newfp;
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282 }
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283 #endif
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284 }
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285 #endif /* _WIN32_WCE */
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286
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287 #ifdef _WIN32_WCE
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288 wcsncpy( stderrPath, path, SDL_arraysize(stdoutPath) );
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289 wcsncat( stderrPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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290 #else
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291 SDL_strlcpy( stderrPath, path, SDL_arraysize(stderrPath) );
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292 SDL_strlcat( stderrPath, DIR_SEPERATOR STDERR_FILE, SDL_arraysize(stderrPath) );
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293 #endif
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294
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295 newfp = freopen(stderrPath, TEXT("w"), stderr);
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296 #ifndef _WIN32_WCE
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297 if ( newfp == NULL ) { /* This happens on NT */
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298 #if !defined(stderr)
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299 stderr = fopen(stderrPath, TEXT("w"));
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300 #else
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301 newfp = fopen(stderrPath, TEXT("w"));
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302 if ( newfp ) {
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303 *stderr = *newfp;
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304 }
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305 #endif
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306 }
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307 #endif /* _WIN32_WCE */
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308
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309 setvbuf(stdout, NULL, _IOLBF, BUFSIZ); /* Line buffered */
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310 setbuf(stderr, NULL); /* No buffering */
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311 #endif /* !NO_STDIO_REDIRECT */
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312
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313 #ifdef _WIN32_WCE
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314 nLen = wcslen(szCmdLine)+128+1;
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315 bufp = SDL_stack_alloc(wchar_t, nLen*2);
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316 wcscpy (bufp, TEXT("\""));
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317 GetModuleFileName(NULL, bufp+1, 128-3);
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318 wcscpy (bufp+wcslen(bufp), TEXT("\" "));
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319 wcsncpy(bufp+wcslen(bufp), szCmdLine,nLen-wcslen(bufp));
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320 nLen = wcslen(bufp)+1;
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321 cmdline = SDL_stack_alloc(char, nLen);
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322 if ( cmdline == NULL ) {
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323 return OutOfMemory();
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324 }
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325 WideCharToMultiByte(CP_ACP, 0, bufp, -1, cmdline, nLen, NULL, NULL);
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326 #else
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327 /* Grab the command line */
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328 bufp = GetCommandLine();
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329 nLen = SDL_strlen(bufp)+1;
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330 cmdline = SDL_stack_alloc(char, nLen);
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331 if ( cmdline == NULL ) {
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332 return OutOfMemory();
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333 }
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334 SDL_strlcpy(cmdline, bufp, nLen);
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335 #endif
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336
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337 /* Parse it into argv and argc */
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338 argc = ParseCommandLine(cmdline, NULL);
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339 argv = SDL_stack_alloc(char*, argc+1);
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340 if ( argv == NULL ) {
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341 return OutOfMemory();
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342 }
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343 ParseCommandLine(cmdline, argv);
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344
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345 /* Run the main program (after a little SDL initialization) */
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346 console_main(argc, argv);
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347
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348 /* Hush little compiler, don't you cry... */
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349 return 0;
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350 }