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author | Roman Zippel <zippel@linux-m68k.org> | 2005-09-06 15:18:49 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-07 16:57:50 -0700 |
commit | 328b9227865026268261a24a97a578907b280415 (patch) | |
tree | 1e0cad4f422252a9c3add879cf847afbb9786cfe /fs/hfs/trans.c | |
parent | 717dd80e999cdc84fb611decec5c5054d37c40d2 (diff) | |
download | kernel_samsung_smdk4412-328b9227865026268261a24a97a578907b280415.zip kernel_samsung_smdk4412-328b9227865026268261a24a97a578907b280415.tar.gz kernel_samsung_smdk4412-328b9227865026268261a24a97a578907b280415.tar.bz2 |
[PATCH] hfs: NLS support
This adds NLS support to HFS. Using the kernel options iocharset and codepage
it's possible to map the disk encoding to a local mapping. If these options
are not used, it falls back to the old direct mapping.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/hfs/trans.c')
-rw-r--r-- | fs/hfs/trans.c | 116 |
1 files changed, 96 insertions, 20 deletions
diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c index fb9720a..e673a88 100644 --- a/fs/hfs/trans.c +++ b/fs/hfs/trans.c @@ -9,12 +9,15 @@ * with ':' vs. '/' as the path-element separator. */ +#include <linux/types.h> +#include <linux/nls.h> + #include "hfs_fs.h" /*================ Global functions ================*/ /* - * hfs_mac2triv() + * hfs_mac2asc() * * Given a 'Pascal String' (a string preceded by a length byte) in * the Macintosh character set produce the corresponding filename using @@ -27,23 +30,58 @@ * by ':' which never appears in HFS filenames. All other characters * are passed unchanged from input to output. */ -int hfs_mac2triv(char *out, const struct hfs_name *in) +int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in) { - const char *p; - char c; - int i, len; + 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; + dstlen = HFS_MAX_NAMELEN; + if (nls_io) { + wchar_t ch; - len = in->len; - p = in->name; - for (i = 0; i < len; i++) { - c = *p++; - *out++ = c == '/' ? ':' : c; + 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; } - return i; +out: + return dst - out; } /* - * hfs_triv2mac() + * hfs_asc2mac() * * Given an ASCII string (not null-terminated) and its length, * generate the corresponding filename in the Macintosh character set @@ -54,19 +92,57 @@ int hfs_mac2triv(char *out, const struct hfs_name *in) * This routine is a inverse to hfs_mac2triv(). * A ':' is replaced by a '/'. */ -void hfs_triv2mac(struct hfs_name *out, struct qstr *in) +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, c; - int i, len; + char *dst; + int srclen, dstlen, size; - out->len = len = min((unsigned int)HFS_NAMELEN, in->len); src = in->name; + srclen = in->len; dst = out->name; - for (i = 0; i < len; i++) { - c = *src++; - *dst++ = c == ':' ? '/' : c; + 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; } - for (; i < HFS_NAMELEN; i++) +out: + out->len = dst - (char *)out->name; + dstlen = HFS_NAMELEN - out->len; + while (--dstlen >= 0) *dst++ = 0; } |