Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/hfs/trans.c |
| 3 | * |
| 4 | * Copyright (C) 1995-1997 Paul H. Hargrove |
| 5 | * This file may be distributed under the terms of the GNU General Public License. |
| 6 | * |
| 7 | * This file contains routines for converting between the Macintosh |
| 8 | * character set and various other encodings. This includes dealing |
| 9 | * with ':' vs. '/' as the path-element separator. |
| 10 | */ |
| 11 | |
| 12 | #include "hfs_fs.h" |
| 13 | |
| 14 | /*================ Global functions ================*/ |
| 15 | |
| 16 | /* |
| 17 | * hfs_mac2triv() |
| 18 | * |
| 19 | * Given a 'Pascal String' (a string preceded by a length byte) in |
| 20 | * the Macintosh character set produce the corresponding filename using |
| 21 | * the 'trivial' name-mangling scheme, returning the length of the |
| 22 | * mangled filename. Note that the output string is not NULL |
| 23 | * terminated. |
| 24 | * |
| 25 | * The name-mangling works as follows: |
| 26 | * The character '/', which is illegal in Linux filenames is replaced |
| 27 | * by ':' which never appears in HFS filenames. All other characters |
| 28 | * are passed unchanged from input to output. |
| 29 | */ |
| 30 | int hfs_mac2triv(char *out, const struct hfs_name *in) |
| 31 | { |
| 32 | const char *p; |
| 33 | char c; |
| 34 | int i, len; |
| 35 | |
| 36 | len = in->len; |
| 37 | p = in->name; |
| 38 | for (i = 0; i < len; i++) { |
| 39 | c = *p++; |
| 40 | *out++ = c == '/' ? ':' : c; |
| 41 | } |
| 42 | return i; |
| 43 | } |
| 44 | |
| 45 | /* |
| 46 | * hfs_triv2mac() |
| 47 | * |
| 48 | * Given an ASCII string (not null-terminated) and its length, |
| 49 | * generate the corresponding filename in the Macintosh character set |
| 50 | * using the 'trivial' name-mangling scheme, returning the length of |
| 51 | * the mangled filename. Note that the output string is not NULL |
| 52 | * terminated. |
| 53 | * |
| 54 | * This routine is a inverse to hfs_mac2triv(). |
| 55 | * A ':' is replaced by a '/'. |
| 56 | */ |
| 57 | void hfs_triv2mac(struct hfs_name *out, struct qstr *in) |
| 58 | { |
| 59 | const char *src; |
| 60 | char *dst, c; |
| 61 | int i, len; |
| 62 | |
| 63 | out->len = len = min((unsigned int)HFS_NAMELEN, in->len); |
| 64 | src = in->name; |
| 65 | dst = out->name; |
| 66 | for (i = 0; i < len; i++) { |
| 67 | c = *src++; |
| 68 | *dst++ = c == ':' ? '/' : c; |
| 69 | } |
| 70 | for (; i < HFS_NAMELEN; i++) |
| 71 | *dst++ = 0; |
| 72 | } |