Atlas - SDL_windows_main.c
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[FILE BEGIN]
1/*
2    SDL_windows_main.c, placed in the public domain by Sam Lantinga  4/13/98
3
4    The WinMain function -- calls your program's main() function
5*/
6#include "SDL_config.h"
7
8#ifdef __WIN32__
9
10/* Include this so we define UNICODE properly */
11#include "../../core/windows/SDL_windows.h"
12
13/* Include the SDL main definition header */
14#include "SDL.h"
15#include "SDL_main.h"
16
17#ifdef main
18#  undef main
19#endif /* main */
20
21static void
22UnEscapeQuotes(char *arg)
23{
24    char *last = NULL;
25
26    while (*arg) {
27        if (*arg == '"' && (last != NULL && *last == '\\')) {
28            char *c_curr = arg;
29            char *c_last = last;
30
31            while (*c_curr) {
32                *c_last = *c_curr;
33                c_last = c_curr;
34                c_curr++;
35            }
36            *c_last = '\0';
37        }
38        last = arg;
39        arg++;
40    }
41}
42
43/* Parse a command line buffer into arguments */
44static int
45ParseCommandLine(char *cmdline, char **argv)
46{
47    char *bufp;
48    char *lastp = NULL;
49    int argc, last_argc;
50
51    argc = last_argc = 0;
52    for (bufp = cmdline; *bufp;) {
53        /* Skip leading whitespace */
54        while (*bufp == ' ' || *bufp == '\t') {
55            ++bufp;
56        }
57        /* Skip over argument */
58        if (*bufp == '"') {
59            ++bufp;
60            if (*bufp) {
61                if (argv) {
62                    argv[argc] = bufp;
63                }
64                ++argc;
65            }
66            /* Skip over word */
67            lastp = bufp;
68            while (*bufp && (*bufp != '"' || *lastp == '\\')) {
69                lastp = bufp;
70                ++bufp;
71            }
72        } else {
73            if (*bufp) {
74                if (argv) {
75                    argv[argc] = bufp;
76                }
77                ++argc;
78            }
79            /* Skip over word */
80            while (*bufp && (*bufp != ' ' && *bufp != '\t')) {
81                ++bufp;
82            }
83        }
84        if (*bufp) {
85            if (argv) {
86                *bufp = '\0';
87            }
88            ++bufp;
89        }
90
91        /* Strip out \ from \" sequences */
92        if (argv && last_argc != argc) {
93            UnEscapeQuotes(argv[last_argc]);
94        }
95        last_argc = argc;
96    }
97    if (argv) {
98        argv[argc] = NULL;
99    }
100    return (argc);
101}
102
103/* Pop up an out of memory message, returns to Windows */
104static BOOL
105OutOfMemory(void)
106{
107    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal Error", "Out of memory - aborting", NULL);
108    return FALSE;
109}
110
111#if defined(_MSC_VER)
112/* The VC++ compiler needs main/wmain defined */
113# define console_ansi_main main
114# if UNICODE
115#  define console_wmain wmain
116# endif
117#endif
118
119/* WinMain, main, and wmain eventually call into here. */
120static int
121main_utf8(int argc, char *argv[])
122{
123    SDL_SetMainReady();
124
125    /* Run the application main() code */
126    return SDL_main(argc, argv);
127}
128
129/* Gets the arguments with GetCommandLine, converts them to argc and argv
130   and calls main_utf8 */
131static int
132main_getcmdline()
133{
134    char **argv;
135    int argc;
136    char *cmdline;
137    int retval = 0;
138
139    /* Grab the command line */
140    TCHAR *text = GetCommandLine();
141#if UNICODE
142    cmdline = WIN_StringToUTF8(text);
143#else
144    /* !!! FIXME: are these in the system codepage? We need to convert to UTF-8. */
145    cmdline = SDL_strdup(text);
146#endif
147    if (cmdline == NULL) {
148        return OutOfMemory();
149    }
150
151    /* Parse it into argv and argc */
152    argc = ParseCommandLine(cmdline, NULL);
153    argv = SDL_stack_alloc(char *, argc + 1);
154    if (argv == NULL) {
155        return OutOfMemory();
156    }
157    ParseCommandLine(cmdline, argv);
158
159    retval = main_utf8(argc, argv);
160
161    SDL_stack_free(argv);
162    SDL_free(cmdline);
163
164    return retval;
165}
166
167/* This is where execution begins [console apps, ansi] */
168int
169console_ansi_main(int argc, char *argv[])
170{
171    return main_getcmdline();
172}
173
174
175#if UNICODE
176/* This is where execution begins [console apps, unicode] */
177int
178console_wmain(int argc, wchar_t *wargv[], wchar_t *wenvp)
179{
180    int retval = 0;
181    char **argv = SDL_stack_alloc(char*, argc + 1);
182    int i;
183
184    for (i = 0; i < argc; ++i) {
185        argv[i] = WIN_StringToUTF8(wargv[i]);
186    }
187    argv[argc] = NULL;
188
189    retval = main_utf8(argc, argv);
190
191    /* !!! FIXME: we are leaking all the elements of argv we allocated. */
192    SDL_stack_free(argv);
193
194    return retval;
195}
196#endif
197
198/* This is where execution begins [windowed apps] */
199int WINAPI
200WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
201{
202    return main_getcmdline();
203}
204
205#endif /* __WIN32__ */
206
207/* vi: set ts=4 sw=4 expandtab: */
208
[FILE END]
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