mangle.c revision 76d05dc695b06c4e987bb8078f78032441e1430c 
1/**
2 * mangle_name:
3 *
4 * Mangle a filename pointed to by src into a buffer pointed
5 * to by dst; ends on encountering any whitespace.
6 * dst is preserved.
7 *
8 * This verifies that a filename is < FILENAME_MAX characters,
9 * doesn't contain whitespace, zero-pads the output buffer,
10 * and removes redundant slashes.
11 *
12 */
13
14#include <string.h>
15#include "fs.h"
16
17void generic_mangle_name(char *dst, const char *src)
18{
19    char *p = dst;
20    int i = FILENAME_MAX-1;
21
22    while (not_whitespace(*src)) {
23        if (*src == '/') {
24            if (src[1] == '/') {
25                src++;
26                i--;
27                continue;
28            }
29        }
30        i--;
31        *dst++ = *src++;
32    }
33
34    while (1) {
35        if (dst == p)
36            break;
37        if (dst[-1] != '/')
38            break;
39	if ((dst[-1] == '/') && ((dst - 1) == p))
40	    break;
41
42        dst--;
43        i++;
44    }
45
46    i++;
47    for (; i > 0; i --)
48        *dst++ = '\0';
49}
50