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annotate src/main/win32/SDL_win32_main.c @ 4504:9faebccfefb3

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Amazingly the Windows code is almost identical to the Mac OS X code. :)
author Sam Lantinga <slouken@libsdl.org>
date Thu, 08 Jul 2010 23:07:34 -0700
parents 41a6675d8700
children ae7799d16c87
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 /* Include the SDL main definition header */
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14 #include "SDL.h"
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15 #include "SDL_main.h"
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16
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17 #ifdef main
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18 # ifndef _WIN32_WCE_EMULATION
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19 # undef main
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20 # endif /* _WIN32_WCE_EMULATION */
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21 #endif /* main */
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22
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23 #if defined(_WIN32_WCE) && _WIN32_WCE < 300
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24 /* seems to be undefined in Win CE although in online help */
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25 #define isspace(a) (((CHAR)a == ' ') || ((CHAR)a == '\t'))
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26 #endif /* _WIN32_WCE < 300 */
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27
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28 static void
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29 UnEscapeQuotes(char *arg)
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30 {
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31 char *last = NULL;
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32
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33 while (*arg) {
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34 if (*arg == '"' && *last == '\\') {
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35 char *c_curr = arg;
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36 char *c_last = last;
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37
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38 while (*c_curr) {
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39 *c_last = *c_curr;
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40 c_last = c_curr;
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41 c_curr++;
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42 }
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43 *c_last = '\0';
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44 }
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45 last = arg;
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46 arg++;
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47 }
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48 }
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49
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50 /* Parse a command line buffer into arguments */
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51 static int
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52 ParseCommandLine(char *cmdline, char **argv)
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53 {
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54 char *bufp;
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55 char *lastp = NULL;
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56 int argc, last_argc;
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57
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58 argc = last_argc = 0;
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59 for (bufp = cmdline; *bufp;) {
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60 /* Skip leading whitespace */
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61 while (isspace(*bufp)) {
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62 ++bufp;
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63 }
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64 /* Skip over argument */
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65 if (*bufp == '"') {
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66 ++bufp;
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67 if (*bufp) {
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68 if (argv) {
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69 argv[argc] = bufp;
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70 }
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71 ++argc;
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72 }
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73 /* Skip over word */
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74 while (*bufp && (*bufp != '"' || *lastp == '\\')) {
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75 lastp = bufp;
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76 ++bufp;
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77 }
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78 } else {
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79 if (*bufp) {
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80 if (argv) {
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81 argv[argc] = bufp;
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82 }
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83 ++argc;
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84 }
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85 /* Skip over word */
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86 while (*bufp && !isspace(*bufp)) {
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87 ++bufp;
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88 }
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89 }
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90 if (*bufp) {
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91 if (argv) {
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92 *bufp = '\0';
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93 }
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94 ++bufp;
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95 }
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96
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97 /* Strip out \ from \" sequences */
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98 if (argv && last_argc != argc) {
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99 UnEscapeQuotes(argv[last_argc]);
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100 }
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101 last_argc = argc;
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102 }
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103 if (argv) {
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104 argv[argc] = NULL;
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105 }
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106 return (argc);
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107 }
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108
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109 /* Show an error message */
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110 static void
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111 ShowError(const char *title, const char *message)
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112 {
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113 /* If USE_MESSAGEBOX is defined, you need to link with user32.lib */
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114 #ifdef USE_MESSAGEBOX
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115 MessageBox(NULL, message, title, MB_ICONEXCLAMATION | MB_OK);
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116 #else
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117 fprintf(stderr, "%s: %s\n", title, message);
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118 #endif
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119 }
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120
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121 /* Pop up an out of memory message, returns to Windows */
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122 static BOOL
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123 OutOfMemory(void)
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124 {
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125 ShowError("Fatal Error", "Out of memory - aborting");
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126 return FALSE;
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127 }
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128
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129 #if defined(_MSC_VER) && !defined(_WIN32_WCE)
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130 /* The VC++ compiler needs main defined */
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131 #define console_main main
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132 #endif
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133
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134 /* This is where execution begins [console apps] */
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135 int
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136 console_main(int argc, char *argv[])
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137 {
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138 int status;
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139
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140 /* Run the application main() code */
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141 status = SDL_main(argc, argv);
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142
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143 /* Exit cleanly, calling atexit() functions */
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144 exit(status);
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145
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146 /* Hush little compiler, don't you cry... */
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147 return 0;
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148 }
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149
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150 /* This is where execution begins [windowed apps] */
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151 int WINAPI
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152 WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPTSTR szCmdLine, int sw)
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153 {
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154 char **argv;
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155 int argc;
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156 char *cmdline;
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157 #ifdef _WIN32_WCE
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158 wchar_t *bufp;
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159 int nLen;
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160 #else
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161 char *bufp;
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162 size_t nLen;
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163 #endif
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164
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165 #ifdef _WIN32_WCE
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166 nLen = wcslen(szCmdLine) + 128 + 1;
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167 bufp = SDL_stack_alloc(wchar_t, nLen * 2);
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168 wcscpy(bufp, TEXT("\""));
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169 GetModuleFileName(NULL, bufp + 1, 128 - 3);
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170 wcscpy(bufp + wcslen(bufp), TEXT("\" "));
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171 wcsncpy(bufp + wcslen(bufp), szCmdLine, nLen - wcslen(bufp));
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172 nLen = wcslen(bufp) + 1;
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173 cmdline = SDL_stack_alloc(char, nLen);
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174 if (cmdline == NULL) {
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175 return OutOfMemory();
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176 }
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177 WideCharToMultiByte(CP_ACP, 0, bufp, -1, cmdline, nLen, NULL, NULL);
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178 #else
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179 /* Grab the command line */
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180 bufp = GetCommandLine();
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181 nLen = SDL_strlen(bufp) + 1;
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182 cmdline = SDL_stack_alloc(char, nLen);
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183 if (cmdline == NULL) {
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184 return OutOfMemory();
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185 }
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186 SDL_strlcpy(cmdline, bufp, nLen);
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187 #endif
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188
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189 /* Parse it into argv and argc */
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190 argc = ParseCommandLine(cmdline, NULL);
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191 argv = SDL_stack_alloc(char *, argc + 1);
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192 if (argv == NULL) {
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193 return OutOfMemory();
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194 }
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195 ParseCommandLine(cmdline, argv);
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196
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197 /* Run the main program */
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198 console_main(argc, argv);
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199
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200 /* Hush little compiler, don't you cry... */
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201 return 0;
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202 }
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203
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204 /* vi: set ts=4 sw=4 expandtab: */