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annotate src/main/win32/SDL_win32_main.c @ 4372:ca91f36ef3de SDL-1.2

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1.2 branch: fixed assembly code register clobbering.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 01 Nov 2009 17:51:39 +0000
parents 8b8314cc34a6
children
rev   line source
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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 /* Set a variable to tell if the stdio redirect has been enabled. */
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42 static int stdioRedirectEnabled = 0;
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43
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44 #ifdef _WIN32_WCE
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45 static wchar_t stdoutPath[MAX_PATH];
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46 static wchar_t stderrPath[MAX_PATH];
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47 #else
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48 static char stdoutPath[MAX_PATH];
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49 static char stderrPath[MAX_PATH];
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50 #endif
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51
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52 #if defined(_WIN32_WCE) && _WIN32_WCE < 300
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53 /* seems to be undefined in Win CE although in online help */
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54 #define isspace(a) (((CHAR)a == ' ') || ((CHAR)a == '\t'))
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55 #endif /* _WIN32_WCE < 300 */
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56
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57 static void UnEscapeQuotes( char *arg )
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58 {
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59 char *last = NULL;
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60
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61 while( *arg ) {
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62 if( *arg == '"' && *last == '\\' ) {
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63 char *c_curr = arg;
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64 char *c_last = last;
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65
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66 while( *c_curr ) {
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67 *c_last = *c_curr;
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68 c_last = c_curr;
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69 c_curr++;
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70 }
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71 *c_last = '\0';
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72 }
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73 last = arg;
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74 arg++;
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75 }
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76 }
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77
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78 /* Parse a command line buffer into arguments */
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79 static int ParseCommandLine(char *cmdline, char **argv)
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80 {
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81 char *bufp;
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82 char *lastp = NULL;
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83 int argc, last_argc;
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84
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85 argc = last_argc = 0;
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86 for ( bufp = cmdline; *bufp; ) {
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87 /* Skip leading whitespace */
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88 while ( isspace(*bufp) ) {
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89 ++bufp;
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90 }
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91 /* Skip over argument */
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92 if ( *bufp == '"' ) {
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93 ++bufp;
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94 if ( *bufp ) {
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95 if ( argv ) {
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96 argv[argc] = bufp;
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97 }
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98 ++argc;
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99 }
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100 /* Skip over word */
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101 while ( *bufp && ( *bufp != '"' || *lastp == '\\' ) ) {
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102 lastp = bufp;
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103 ++bufp;
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104 }
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105 } else {
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106 if ( *bufp ) {
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107 if ( argv ) {
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108 argv[argc] = bufp;
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109 }
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110 ++argc;
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111 }
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112 /* Skip over word */
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113 while ( *bufp && ! isspace(*bufp) ) {
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114 ++bufp;
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115 }
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116 }
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117 if ( *bufp ) {
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118 if ( argv ) {
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119 *bufp = '\0';
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120 }
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121 ++bufp;
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122 }
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123
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124 /* Strip out \ from \" sequences */
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125 if( argv && last_argc != argc ) {
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126 UnEscapeQuotes( argv[last_argc] );
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127 }
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128 last_argc = argc;
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129 }
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130 if ( argv ) {
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131 argv[argc] = NULL;
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132 }
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133 return(argc);
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134 }
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135
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136 /* Show an error message */
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137 static void ShowError(const char *title, const char *message)
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138 {
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139 /* If USE_MESSAGEBOX is defined, you need to link with user32.lib */
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140 #ifdef USE_MESSAGEBOX
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141 MessageBox(NULL, message, title, MB_ICONEXCLAMATION|MB_OK);
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142 #else
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143 fprintf(stderr, "%s: %s\n", title, message);
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144 #endif
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145 }
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146
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147 /* Pop up an out of memory message, returns to Windows */
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148 static BOOL OutOfMemory(void)
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149 {
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150 ShowError("Fatal Error", "Out of memory - aborting");
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151 return FALSE;
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152 }
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153
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154 /* SDL_Quit() shouldn't be used with atexit() directly because
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155 calling conventions may differ... */
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156 static void cleanup(void)
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157 {
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158 SDL_Quit();
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159 }
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160
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161 /* Remove the output files if there was no output written */
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162 static void cleanup_output(void) {
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163 FILE *file;
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164 int empty;
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165
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166 /* Flush the output in case anything is queued */
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167 fclose(stdout);
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168 fclose(stderr);
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169
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170 /* Without redirection we're done */
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171 if (!stdioRedirectEnabled) {
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172 return;
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173 }
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174
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175 /* See if the files have any output in them */
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176 if ( stdoutPath[0] ) {
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177 file = fopen(stdoutPath, TEXT("rb"));
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178 if ( file ) {
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179 empty = (fgetc(file) == EOF) ? 1 : 0;
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180 fclose(file);
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181 if ( empty ) {
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182 remove(stdoutPath);
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183 }
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184 }
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185 }
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186 if ( stderrPath[0] ) {
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187 file = fopen(stderrPath, TEXT("rb"));
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188 if ( file ) {
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189 empty = (fgetc(file) == EOF) ? 1 : 0;
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190 fclose(file);
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191 if ( empty ) {
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192 remove(stderrPath);
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193 }
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194 }
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195 }
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196 }
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197
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198 /* Redirect the output (stdout and stderr) to a file */
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199 static void redirect_output(void)
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200 {
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201 DWORD pathlen;
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202 #ifdef _WIN32_WCE
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203 wchar_t path[MAX_PATH];
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204 #else
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205 char path[MAX_PATH];
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206 #endif
4246
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207 FILE *newfp;
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208
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209 pathlen = GetModuleFileName(NULL, path, SDL_arraysize(path));
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210 while ( pathlen > 0 && path[pathlen] != '\\' ) {
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211 --pathlen;
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212 }
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213 path[pathlen] = '\0';
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214
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215 #ifdef _WIN32_WCE
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216 wcsncpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
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217 wcsncat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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218 #else
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219 SDL_strlcpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
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220 SDL_strlcat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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221 #endif
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222
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223 /* Redirect standard input and standard output */
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224 newfp = freopen(stdoutPath, TEXT("w"), stdout);
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225
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226 #ifndef _WIN32_WCE
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227 if ( newfp == NULL ) { /* This happens on NT */
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228 #if !defined(stdout)
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229 stdout = fopen(stdoutPath, TEXT("w"));
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230 #else
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231 newfp = fopen(stdoutPath, TEXT("w"));
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232 if ( newfp ) {
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233 *stdout = *newfp;
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234 }
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235 #endif
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236 }
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237 #endif /* _WIN32_WCE */
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238
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239 #ifdef _WIN32_WCE
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240 wcsncpy( stderrPath, path, SDL_arraysize(stdoutPath) );
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241 wcsncat( stderrPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
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242 #else
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243 SDL_strlcpy( stderrPath, path, SDL_arraysize(stderrPath) );
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244 SDL_strlcat( stderrPath, DIR_SEPERATOR STDERR_FILE, SDL_arraysize(stderrPath) );
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245 #endif
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246
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247 newfp = freopen(stderrPath, TEXT("w"), stderr);
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248 #ifndef _WIN32_WCE
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249 if ( newfp == NULL ) { /* This happens on NT */
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250 #if !defined(stderr)
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251 stderr = fopen(stderrPath, TEXT("w"));
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252 #else
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253 newfp = fopen(stderrPath, TEXT("w"));
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254 if ( newfp ) {
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255 *stderr = *newfp;
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256 }
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diff changeset
257 #endif
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258 }
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259 #endif /* _WIN32_WCE */
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260
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261 setvbuf(stdout, NULL, _IOLBF, BUFSIZ); /* Line buffered */
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262 setbuf(stderr, NULL); /* No buffering */
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263 stdioRedirectEnabled = 1;
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264 }
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265
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266 #if defined(_MSC_VER) && !defined(_WIN32_WCE)
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267 /* The VC++ compiler needs main defined */
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268 #define console_main main
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269 #endif
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270
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271 /* This is where execution begins [console apps] */
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272 int console_main(int argc, char *argv[])
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273 {
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274 size_t n;
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275 char *bufp, *appname;
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276 int status;
754
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277
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278 /* Get the class name from argv[0] */
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279 appname = argv[0];
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280 if ( (bufp=SDL_strrchr(argv[0], '\\')) != NULL ) {
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281 appname = bufp+1;
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282 } else
1336
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283 if ( (bufp=SDL_strrchr(argv[0], '/')) != NULL ) {
754
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284 appname = bufp+1;
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285 }
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286
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287 if ( (bufp=SDL_strrchr(appname, '.')) == NULL )
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288 n = SDL_strlen(appname);
754
623b453a3219 Fixed "dist" make target for newer versions of automake
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289 else
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290 n = (bufp-appname);
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291
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diff changeset
292 bufp = SDL_stack_alloc(char, n+1);
754
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293 if ( bufp == NULL ) {
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294 return OutOfMemory();
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295 }
1769
290b5baf2fca Fixed bug #215
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296 SDL_strlcpy(bufp, appname, n+1);
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297 appname = bufp;
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298
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299 /* Load SDL dynamic link library */
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300 if ( SDL_Init(SDL_INIT_NOPARACHUTE) < 0 ) {
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301 ShowError("WinMain() error", SDL_GetError());
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302 return(FALSE);
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303 }
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304 atexit(cleanup_output);
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305 atexit(cleanup);
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306
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307 /* Sam:
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308 We still need to pass in the application handle so that
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309 DirectInput will initialize properly when SDL_RegisterApp()
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310 is called later in the video initialization.
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311 */
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312 SDL_SetModuleHandle(GetModuleHandle(NULL));
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313
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314 /* Run the application main() code */
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315 status = SDL_main(argc, argv);
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316
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317 /* Exit cleanly, calling atexit() functions */
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318 exit(status);
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319
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320 /* Hush little compiler, don't you cry... */
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321 return 0;
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322 }
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323
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324 /* This is where execution begins [windowed apps] */
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325 #ifdef _WIN32_WCE
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326 int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPWSTR szCmdLine, int sw)
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327 #else
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328 int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
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329 #endif
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330 {
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331 HINSTANCE handle;
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332 char **argv;
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333 int argc;
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334 char *cmdline;
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335 char *env_str;
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336 #ifdef _WIN32_WCE
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337 wchar_t *bufp;
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338 int nLen;
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339 #else
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340 char *bufp;
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341 size_t nLen;
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342 #endif
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343
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344 /* Start up DDHELP.EXE before opening any files, so DDHELP doesn't
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345 keep them open. This is a hack.. hopefully it will be fixed
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346 someday. DDHELP.EXE starts up the first time DDRAW.DLL is loaded.
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347 */
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348 handle = LoadLibrary(TEXT("DDRAW.DLL"));
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349 if ( handle != NULL ) {
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350 FreeLibrary(handle);
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351 }
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352
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353 /* Check for stdio redirect settings and do the redirection */
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354 if ((env_str = SDL_getenv("SDL_STDIO_REDIRECT"))) {
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355 if (SDL_atoi(env_str)) {
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356 redirect_output();
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357 }
1286
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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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363 #endif
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364
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365 #ifdef _WIN32_WCE
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366 nLen = wcslen(szCmdLine)+128+1;
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367 bufp = SDL_stack_alloc(wchar_t, nLen*2);
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368 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;
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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 }
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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) */
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398 console_main(argc, argv);
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399
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400 /* Hush little compiler, don't you cry... */
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401 return 0;
754
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402 }