windows 上的 _splitpath 函数在 linux 平台下的简单实现

1
2
3
4
5

path，　Full path（完整路径）
drive ， Optional drive letter, followed by a colon (:)（ 磁盘驱动包含：）
dir， Optional directory path, including trailing slash. Forward slashes (/ ), backslashes (\ ), or both may be used.（文件路径，无论是以“/”，“\”）
fname， Base filename (no extension)（文件名）
ext ， Optional filename extension, including leading period (.)（后缀名）

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87

#include <stdio.h>
#include <string.h>
 
#ifndef WIN32
void _splitpath(const char *path, char *drive, char *dir, char *fname, char *ext);
 
static void _split_whole_name(const char *whole_name, char *fname, char *ext);
#endif
 
/* main test */
int main(void)
{
	char *path = "/home/test/dir/f123.txt";
	// char *path = "/home/test/dir/123.txt";
	// char *path = "/home/test/dir/123";
	// char *path = "123";
	// char *path = "123.txt";
 
	char drive[128];
	char dir[128];
	char fname[128];
	char ext[128];
 
	_splitpath(path, drive, dir, fname, ext);
	printf("path  = %s\n", path);
	printf("dir   = %s\n", dir);
	printf("fname = %s\n", fname);
	printf("ext   = %s\n", ext);
	
	return 0;
}
 
#ifndef WIN32
void _splitpath(const char *path, char *drive, char *dir, char *fname, char *ext)
{
	char *p_whole_name;
 
	drive[0] = '\0';
	if (NULL == path)
	{
		dir[0] = '\0';
		fname[0] = '\0';
		ext[0] = '\0';
		return;
	}
 
	if ('/' == path[strlen(path)])
	{
		strcpy(dir, path);
		fname[0] = '\0';
		ext[0] = '\0';
		return;
	}
 
	p_whole_name = rindex(path, '/');
	if (NULL != p_whole_name)
	{
		p_whole_name++;
		_split_whole_name(p_whole_name, fname, ext);
 
		snprintf(dir, p_whole_name - path, "%s", path);
	}
	else
	{
		_split_whole_name(path, fname, ext);
		dir[0] = '\0';
	}
}
 
static void _split_whole_name(const char *whole_name, char *fname, char *ext)
{
	char *p_ext;
 
	p_ext = rindex(whole_name, '.');
	if (NULL != p_ext)
	{
		strcpy(ext, p_ext);
		snprintf(fname, p_ext - whole_name + 1, "%s", whole_name);
	}
	else
	{
		ext[0] = '\0';
		strcpy(fname, whole_name);
	}
}
 
#endif