/* * Copyright (C) International Business Machines Corp., 2000-2004 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/fs.h> #include <linux/slab.h> #include "jfs_incore.h" #include "jfs_filsys.h" #include "jfs_unicode.h" #include "jfs_debug.h" /* * NAME: jfs_strfromUCS() * * FUNCTION: Convert little-endian unicode string to character string * */ int jfs_strfromUCS_le(char *to, const __le16 * from, int len, struct nls_table *codepage) { int i; int outlen = 0; static int warn_again = 5; /* Only warn up to 5 times total */ int warn = !!warn_again; /* once per string */ if (codepage) { for (i = 0; (i < len) && from[i]; i++) { int charlen; charlen = codepage->uni2char(le16_to_cpu(from[i]), &to[outlen], NLS_MAX_CHARSET_SIZE); if (charlen > 0) outlen += charlen; else to[outlen++] = '?'; } } else { for (i = 0; (i < len) && from[i]; i++) { if (unlikely(le16_to_cpu(from[i]) & 0xff00)) { to[i] = '?'; if (unlikely(warn)) { warn--; warn_again--; printk(KERN_ERR "non-latin1 character 0x%x found in JFS file name\n", le16_to_cpu(from[i])); printk(KERN_ERR "mount with iocharset=utf8 to access\n"); } } else to[i] = (char) (le16_to_cpu(from[i])); } outlen = i; } to[outlen] = 0; return outlen; } /* * NAME: jfs_strtoUCS() * * FUNCTION: Convert character string to unicode string * */ static int jfs_strtoUCS(wchar_t * to, const unsigned char *from, int len, struct nls_table *codepage) { int charlen; int i; if (codepage) { for (i = 0; len && *from; i++, from += charlen, len -= charlen) { charlen = codepage->char2uni(from, len, &to[i]); if (charlen < 1) { jfs_err("jfs_strtoUCS: char2uni returned %d.", charlen); jfs_err("charset = %s, char = 0x%x", codepage->charset, *from); return charlen; } } } else { for (i = 0; (i < len) && from[i]; i++) to[i] = (wchar_t) from[i]; } to[i] = 0; return i; } /* * NAME: get_UCSname() * * FUNCTION: Allocate and translate to unicode string * */ int get_UCSname(struct component_name * uniName, struct dentry *dentry) { struct nls_table *nls_tab = JFS_SBI(dentry->d_sb)->nls_tab; int length = dentry->d_name.len; if (length > JFS_NAME_MAX) return -ENAMETOOLONG; uniName->name = kmalloc((length + 1) * sizeof(wchar_t), GFP_NOFS); if (uniName->name == NULL) return -ENOSPC; uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name, length, nls_tab); if (uniName->namlen < 0) { kfree(uniName->name); return uniName->namlen; } return 0; }