/* * linux/fs/hfs/trans.c * * Copyright (C) 1995-1997 Paul H. Hargrove * This file may be distributed under the terms of the GNU General Public License. * * This file contains routines for converting between the Macintosh * character set and various other encodings. This includes dealing * with ':' vs. '/' as the path-element separator. */ #include <linux/types.h> #include <linux/nls.h> #include "hfs_fs.h" /*================ Global functions ================*/ /* * hfs_mac2asc() * * Given a 'Pascal String' (a string preceded by a length byte) in * the Macintosh character set produce the corresponding filename using * the 'trivial' name-mangling scheme, returning the length of the * mangled filename. Note that the output string is not NULL * terminated. * * The name-mangling works as follows: * The character '/', which is illegal in Linux filenames is replaced * by ':' which never appears in HFS filenames. All other characters * are passed unchanged from input to output. */ int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in) { struct nls_table *nls_disk = HFS_SB(sb)->nls_disk; struct nls_table *nls_io = HFS_SB(sb)->nls_io; const char *src; char *dst; int srclen, dstlen, size; src = in->name; srclen = in->len; if (srclen > HFS_NAMELEN) srclen = HFS_NAMELEN; dst = out; dstlen = HFS_MAX_NAMELEN; if (nls_io) { wchar_t ch; while (srclen > 0) { if (nls_disk) { size = nls_disk->char2uni(src, srclen, &ch); if (size <= 0) { ch = '?'; size = 1; } src += size; srclen -= size; } else { ch = *src++; srclen--; } if (ch == '/') ch = ':'; size = nls_io->uni2char(ch, dst, dstlen); if (size < 0) { if (size == -ENAMETOOLONG) goto out; *dst = '?'; size = 1; } dst += size; dstlen -= size; } } else { char ch; while (--srclen >= 0) *dst++ = (ch = *src++) == '/' ? ':' : ch; } out: return dst - out; } /* * hfs_asc2mac() * * Given an ASCII string (not null-terminated) and its length, * generate the corresponding filename in the Macintosh character set * using the 'trivial' name-mangling scheme, returning the length of * the mangled filename. Note that the output string is not NULL * terminated. * * This routine is a inverse to hfs_mac2triv(). * A ':' is replaced by a '/'. */ void hfs_asc2mac(struct super_block *sb, struct hfs_name *out, struct qstr *in) { struct nls_table *nls_disk = HFS_SB(sb)->nls_disk; struct nls_table *nls_io = HFS_SB(sb)->nls_io; const char *src; char *dst; int srclen, dstlen, size; src = in->name; srclen = in->len; dst = out->name; dstlen = HFS_NAMELEN; if (nls_io) { wchar_t ch; while (srclen > 0) { size = nls_io->char2uni(src, srclen, &ch); if (size < 0) { ch = '?'; size = 1; } src += size; srclen -= size; if (ch == ':') ch = '/'; if (nls_disk) { size = nls_disk->uni2char(ch, dst, dstlen); if (size < 0) { if (size == -ENAMETOOLONG) goto out; *dst = '?'; size = 1; } dst += size; dstlen -= size; } else { *dst++ = ch > 0xff ? '?' : ch; dstlen--; } } } else { char ch; if (dstlen > srclen) dstlen = srclen; while (--dstlen >= 0) *dst++ = (ch = *src++) == ':' ? '/' : ch; } out: out->len = dst - (char *)out->name; dstlen = HFS_NAMELEN - out->len; while (--dstlen >= 0) *dst++ = 0; }