OXYGENHUB
# 9120e87480a6 enhanced-x16-emulator / src / dirent_win32.h
1.4 KiB · Objective-C · last changed chore(): initial commit 26 days ago source blame history raw
1 
// Commander X16 Emulator
2 
// POSIX dirent.h compatibility shim for MSVC
3 
// Wraps Windows FindFirstFile/FindNextFile APIs
4
5 
#ifndef DIRENT_WIN32_H
6 
#define DIRENT_WIN32_H
7
8 
#ifdef _MSC_VER
9
10 
#include <windows.h>
11 
#include <errno.h>
12 
#include <string.h>
13
14 
struct dirent {
15 
	char d_name[MAX_PATH];
16 
};
17
18 
typedef struct {
19 
	HANDLE           hFind;
20 
	WIN32_FIND_DATAA fdata;
21 
	struct dirent    entry;
22 
	bool             first;
23 
} DIR;
24
25 
static inline DIR *opendir(const char *name)
26 
{
27 
	char path[MAX_PATH];
28 
	size_t len = strlen(name);
29
30 
	if (len == 0 || len + 3 > MAX_PATH) {
31 
		errno = ENOENT;
32 
		return NULL;
33 
	}
34
35 
	snprintf(path, MAX_PATH, "%s\\*", name);
36
37 
	DIR *dir = (DIR *)malloc(sizeof(DIR));
38 
	if (!dir) {
39 
		errno = ENOMEM;
40 
		return NULL;
41 
	}
42
43 
	dir->hFind = FindFirstFileA(path, &dir->fdata);
44 
	if (dir->hFind == INVALID_HANDLE_VALUE) {
45 
		free(dir);
46 
		errno = ENOENT;
47 
		return NULL;
48 
	}
49
50 
	dir->first = true;
51 
	return dir;
52 
}
53
54 
static inline struct dirent *readdir(DIR *dir)
55 
{
56 
	if (!dir)
57 
		return NULL;
58
59 
	if (dir->first) {
60 
		dir->first = false;
61 
	} else {
62 
		if (!FindNextFileA(dir->hFind, &dir->fdata))
63 
			return NULL;
64 
	}
65
66 
	strncpy(dir->entry.d_name, dir->fdata.cFileName, MAX_PATH);
67 
	dir->entry.d_name[MAX_PATH - 1] = '\0';
68 
	return &dir->entry;
69 
}
70
71 
static inline int closedir(DIR *dir)
72 
{
73 
	if (!dir)
74 
		return -1;
75
76 
	FindClose(dir->hFind);
77 
	free(dir);
78 
	return 0;
79 
}
80
81 
#else
82
83 
#include <dirent.h>
84
85 
#endif // _MSC_VER
86
87 
#endif // DIRENT_WIN32_H