diff options
Diffstat (limited to 'drivers/staging/exfat/exfat_nls.c')
| -rw-r--r-- | drivers/staging/exfat/exfat_nls.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/drivers/staging/exfat/exfat_nls.c b/drivers/staging/exfat/exfat_nls.c deleted file mode 100644 index 91e8b0c4dce7..000000000000 --- a/drivers/staging/exfat/exfat_nls.c +++ /dev/null @@ -1,212 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. - */ - -#include <linux/string.h> -#include <linux/nls.h> -#include "exfat.h" - -static u16 bad_uni_chars[] = { - /* " * / : < > ? \ | */ - 0x0022, 0x002A, 0x002F, 0x003A, - 0x003C, 0x003E, 0x003F, 0x005C, 0x007C, - 0 -}; - -static int convert_ch_to_uni(struct nls_table *nls, u16 *uni, u8 *ch, - bool *lossy) -{ - int len; - - *uni = 0x0; - - if (ch[0] < 0x80) { - *uni = (u16)ch[0]; - return 1; - } - - len = nls->char2uni(ch, NLS_MAX_CHARSET_SIZE, uni); - if (len < 0) { - /* conversion failed */ - pr_info("%s: fail to use nls\n", __func__); - if (lossy) - *lossy = true; - *uni = (u16)'_'; - if (!strcmp(nls->charset, "utf8")) - return 1; - else - return 2; - } - - return len; -} - -static int convert_uni_to_ch(struct nls_table *nls, u8 *ch, u16 uni, - bool *lossy) -{ - int len; - - ch[0] = 0x0; - - if (uni < 0x0080) { - ch[0] = (u8)uni; - return 1; - } - - len = nls->uni2char(uni, ch, NLS_MAX_CHARSET_SIZE); - if (len < 0) { - /* conversion failed */ - pr_info("%s: fail to use nls\n", __func__); - if (lossy) - *lossy = true; - ch[0] = '_'; - return 1; - } - - return len; -} - -u16 nls_upper(struct super_block *sb, u16 a) -{ - struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info); - - if (EXFAT_SB(sb)->options.casesensitive) - return a; - if (p_fs->vol_utbl && p_fs->vol_utbl[get_col_index(a)]) - return p_fs->vol_utbl[get_col_index(a)][get_row_index(a)]; - else - return a; -} - -static u16 *nls_wstrchr(u16 *str, u16 wchar) -{ - while (*str) { - if (*(str++) == wchar) - return str; - } - - return NULL; -} - -int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b) -{ - int i; - - for (i = 0; i < MAX_NAME_LENGTH; i++, a++, b++) { - if (nls_upper(sb, *a) != nls_upper(sb, *b)) - return 1; - if (*a == 0x0) - return 0; - } - return 0; -} - -void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring, - struct uni_name_t *p_uniname) -{ - int i, j, len; - u8 buf[MAX_CHARSET_SIZE]; - u16 *uniname = p_uniname->name; - struct nls_table *nls = EXFAT_SB(sb)->nls_io; - - if (!nls) { - len = utf16s_to_utf8s(uniname, MAX_NAME_LENGTH, - UTF16_HOST_ENDIAN, p_cstring, - MAX_NAME_LENGTH); - p_cstring[len] = 0; - return; - } - - i = 0; - while (i < (MAX_NAME_LENGTH - 1)) { - if (*uniname == (u16)'\0') - break; - - len = convert_uni_to_ch(nls, buf, *uniname, NULL); - - if (len > 1) { - for (j = 0; j < len; j++) - *p_cstring++ = (char)*(buf + j); - } else { /* len == 1 */ - *p_cstring++ = (char)*buf; - } - - uniname++; - i++; - } - - *p_cstring = '\0'; -} - -void nls_cstring_to_uniname(struct super_block *sb, - struct uni_name_t *p_uniname, u8 *p_cstring, - bool *p_lossy) -{ - int i, j; - bool lossy = false; - u8 *end_of_name; - u8 upname[MAX_NAME_LENGTH * 2]; - u16 *uniname = p_uniname->name; - struct nls_table *nls = EXFAT_SB(sb)->nls_io; - - /* strip all trailing spaces */ - end_of_name = p_cstring + strlen(p_cstring); - - while (*(--end_of_name) == ' ') { - if (end_of_name < p_cstring) - break; - } - *(++end_of_name) = '\0'; - - if (strcmp(p_cstring, ".") && strcmp(p_cstring, "..")) { - /* strip all trailing periods */ - while (*(--end_of_name) == '.') { - if (end_of_name < p_cstring) - break; - } - *(++end_of_name) = '\0'; - } - - if (*p_cstring == '\0') - lossy = true; - - if (!nls) { - i = utf8s_to_utf16s(p_cstring, MAX_NAME_LENGTH, - UTF16_HOST_ENDIAN, uniname, - MAX_NAME_LENGTH); - for (j = 0; j < i; j++) - SET16_A(upname + j * 2, nls_upper(sb, uniname[j])); - uniname[i] = '\0'; - } else { - i = 0; - j = 0; - while (j < (MAX_NAME_LENGTH - 1)) { - if (*(p_cstring + i) == '\0') - break; - - i += convert_ch_to_uni(nls, uniname, - (u8 *)(p_cstring + i), &lossy); - - if ((*uniname < 0x0020) || - nls_wstrchr(bad_uni_chars, *uniname)) - lossy = true; - - SET16_A(upname + j * 2, nls_upper(sb, *uniname)); - - uniname++; - j++; - } - - if (*(p_cstring + i) != '\0') - lossy = true; - *uniname = (u16)'\0'; - } - - p_uniname->name_len = j; - p_uniname->name_hash = calc_checksum_2byte(upname, j << 1, 0, - CS_DEFAULT); - - if (p_lossy) - *p_lossy = lossy; -} |