/* * linux/fs/isofs/joliet.c * * (C) 1996 Gordon Chaffee * * Joliet: Microsoft's Unicode extensions to iso9660 */ #include <linux/types.h> #include <linux/nls.h> #include "isofs.h" /* * Convert Unicode 16 to UTF8 or ASCII. */ static int uni16_to_x8(unsigned char *ascii, u16 *uni, int len, struct nls_table *nls) { wchar_t *ip, ch; unsigned char *op; ip = uni; op = ascii; while ((ch = get_unaligned(ip)) && len) { int llen; ch = be16_to_cpu(ch); if ((llen = nls->uni2char(ch, op, NLS_MAX_CHARSET_SIZE)) > 0) op += llen; else *op++ = '?'; ip++; len--; } *op = 0; return (op - ascii); } /* Convert big endian wide character string to utf8 */ static int wcsntombs_be(__u8 *s, const __u8 *pwcs, int inlen, int maxlen) { const __u8 *ip; __u8 *op; int size; __u16 c; op = s; ip = pwcs; while ((*ip || ip[1]) && (maxlen > 0) && (inlen > 0)) { c = (*ip << 8) | ip[1]; if (c > 0x7f) { size = utf8_wctomb(op, c, maxlen); if (size == -1) { /* Ignore character and move on */ maxlen--; } else { op += size; maxlen -= size; } } else { *op++ = (__u8) c; } ip += 2; inlen--; } return (op - s); } int get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode) { unsigned char utf8; struct nls_table *nls; unsigned char len = 0; utf8 = ISOFS_SB(inode->i_sb)->s_utf8; nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset; if (utf8) { len = wcsntombs_be(outname, de->name, de->name_len[0] >> 1, PAGE_SIZE); } else { len = uni16_to_x8(outname, (u16 *) de->name, de->name_len[0] >> 1, nls); } if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) { len -= 2; } /* * Windows doesn't like periods at the end of a name, * so neither do we */ while (len >= 2 && (outname[len-1] == '.')) { len--; } return len; }