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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 <string.h>
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9 #include <ctype.h>
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10 #include <stdlib.h>
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11
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12 #include <windows.h>
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13 #include <malloc.h> /* For _alloca() */
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14
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15 /* Include the SDL main definition header */
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16 #include "SDL.h"
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17 #include "SDL_main.h"
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18 #ifdef main
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19 #undef main
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20 #endif
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21
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22 /* The standard output files */
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23 #define STDOUT_FILE "stdout.txt"
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24 #define STDERR_FILE "stderr.txt"
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25
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26 /* Parse a command line buffer into arguments */
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27 static int ParseCommandLine(char *cmdline, char **argv)
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28 {
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29 char *bufp;
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30 int argc;
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31
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32 argc = 0;
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33 for ( bufp = cmdline; *bufp; ) {
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34 /* Skip leading whitespace */
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35 while ( isspace(*bufp) ) {
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36 ++bufp;
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37 }
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38 /* Skip over argument */
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39 if ( *bufp == '"' ) {
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40 ++bufp;
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41 if ( *bufp ) {
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42 if ( argv ) {
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43 argv[argc] = bufp;
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44 }
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45 ++argc;
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46 }
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47 /* Skip over word */
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48 while ( *bufp && (*bufp != '"') ) {
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49 ++bufp;
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50 }
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51 } else {
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52 if ( *bufp ) {
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53 if ( argv ) {
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54 argv[argc] = bufp;
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55 }
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56 ++argc;
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57 }
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58 /* Skip over word */
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59 while ( *bufp && ! isspace(*bufp) ) {
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60 ++bufp;
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61 }
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62 }
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63 if ( *bufp ) {
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64 if ( argv ) {
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65 *bufp = '\0';
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66 }
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67 ++bufp;
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68 }
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69 }
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70 if ( argv ) {
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71 argv[argc] = NULL;
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72 }
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73 return(argc);
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74 }
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75
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76 /* Show an error message */
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77 static void ShowError(const char *title, const char *message)
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78 {
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79 /* If USE_MESSAGEBOX is defined, you need to link with user32.lib */
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80 #ifdef USE_MESSAGEBOX
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81 MessageBox(NULL, message, title, MB_ICONEXCLAMATION|MB_OK);
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82 #else
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83 fprintf(stderr, "%s: %s\n", title, message);
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84 #endif
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85 }
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86
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87 /* Pop up an out of memory message, returns to Windows */
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88 static BOOL OutOfMemory(void)
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89 {
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90 ShowError("Fatal Error", "Out of memory - aborting");
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91 return FALSE;
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92 }
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93
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94 /* Remove the output files if there was no output written */
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95 static void cleanup_output(void)
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96 {
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97 FILE *file;
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98 int empty;
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99
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100 /* Flush the output in case anything is queued */
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101 fclose(stdout);
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102 fclose(stderr);
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103
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104 /* See if the files have any output in them */
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105 file = fopen(STDOUT_FILE, "rb");
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106 if ( file ) {
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107 empty = (fgetc(file) == EOF) ? 1 : 0;
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108 fclose(file);
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109 if ( empty ) {
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110 remove(STDOUT_FILE);
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111 }
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112 }
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113 file = fopen(STDERR_FILE, "rb");
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114 if ( file ) {
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115 empty = (fgetc(file) == EOF) ? 1 : 0;
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116 fclose(file);
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117 if ( empty ) {
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118 remove(STDERR_FILE);
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119 }
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120 }
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121 }
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122
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123 #ifdef _MSC_VER /* The VC++ compiler needs main defined */
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124 #define console_main main
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125 #endif
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126
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127 /* This is where execution begins [console apps] */
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128 int console_main(int argc, char *argv[])
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129 {
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130 int n;
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131 char *bufp, *appname;
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132
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133 /* Get the class name from argv[0] */
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134 appname = argv[0];
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135 if ( (bufp=strrchr(argv[0], '\\')) != NULL ) {
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136 appname = bufp+1;
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137 } else
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138 if ( (bufp=strrchr(argv[0], '/')) != NULL ) {
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139 appname = bufp+1;
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140 }
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141
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142 if ( (bufp=strrchr(appname, '.')) == NULL )
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143 n = strlen(appname);
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144 else
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145 n = (bufp-appname);
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146
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147 bufp = (char *)alloca(n+1);
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148 if ( bufp == NULL ) {
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149 return OutOfMemory();
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150 }
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151 strncpy(bufp, appname, n);
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152 bufp[n] = '\0';
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153 appname = bufp;
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154
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155 /* Load SDL dynamic link library */
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156 if ( SDL_Init(SDL_INIT_NOPARACHUTE) < 0 ) {
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157 ShowError("WinMain() error", SDL_GetError());
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158 return(FALSE);
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159 }
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160 atexit(cleanup_output);
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161 atexit(SDL_Quit);
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162
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163 /* Create and register our class, then run main code */
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164 if ( SDL_RegisterApp(appname, CS_BYTEALIGNCLIENT,
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165 GetModuleHandle(NULL)) < 0 ) {
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166 ShowError("WinMain() error", SDL_GetError());
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167 exit(1);
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168 }
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169 SDL_main(argc, argv);
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170
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171 /* Exit cleanly, calling atexit() functions */
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172 exit(0);
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173 }
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174
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175 /* This is where execution begins [windowed apps] */
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176 int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
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177 {
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178 HINSTANCE handle;
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179 char **argv;
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180 int argc;
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181 char *cmdline;
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182 char *bufp;
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183 #ifndef NO_STDIO_REDIRECT
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184 FILE *newfp;
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185 #endif
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186
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187 /* Start up DDHELP.EXE before opening any files, so DDHELP doesn't
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188 keep them open. This is a hack.. hopefully it will be fixed
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189 someday. DDHELP.EXE starts up the first time DDRAW.DLL is loaded.
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190 */
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191 handle = LoadLibrary("DDRAW.DLL");
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192 if ( handle != NULL ) {
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193 FreeLibrary(handle);
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194 }
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195
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196 #ifndef NO_STDIO_REDIRECT
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197 /* Redirect standard input and standard output */
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198 newfp = freopen(STDOUT_FILE, "w", stdout);
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199 if ( newfp == NULL ) { /* This happens on NT */
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200 #if !defined(stdout)
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201 stdout = fopen(STDOUT_FILE, "w");
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202 #else
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203 newfp = fopen(STDOUT_FILE, "w");
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204 if ( newfp ) {
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205 *stdout = *newfp;
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206 }
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207 #endif
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208 }
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209 newfp = freopen(STDERR_FILE, "w", stderr);
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210 if ( newfp == NULL ) { /* This happens on NT */
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211 #if !defined(stderr)
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212 stderr = fopen(STDERR_FILE, "w");
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213 #else
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214 newfp = fopen(STDERR_FILE, "w");
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215 if ( newfp ) {
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216 *stderr = *newfp;
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217 }
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218 #endif
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219 }
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220 setvbuf(stdout, NULL, _IOLBF, BUFSIZ); /* Line buffered */
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221 setbuf(stderr, NULL); /* No buffering */
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222 #endif /* !NO_STDIO_REDIRECT */
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223
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224 /* Grab the command line (use alloca() on Windows) */
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225 bufp = GetCommandLine();
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226 cmdline = (char *)alloca(strlen(bufp)+1);
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227 if ( cmdline == NULL ) {
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228 return OutOfMemory();
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229 }
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230 strcpy(cmdline, bufp);
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231
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232 /* Parse it into argv and argc */
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233 argc = ParseCommandLine(cmdline, NULL);
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234 argv = (char **)alloca((argc+1)*(sizeof *argv));
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235 if ( argv == NULL ) {
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236 return OutOfMemory();
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237 }
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238 ParseCommandLine(cmdline, argv);
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239
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240 /* Run the main program (after a little SDL initialization) */
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241 return(console_main(argc, argv));
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242 }
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