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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 01:28:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
347
fs/exfat/exfat_nls.c
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347
fs/exfat/exfat_nls.c
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/*
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* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "exfat_config.h"
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#include "exfat_global.h"
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#include "exfat_data.h"
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#include "exfat_nls.h"
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#include "exfat_api.h"
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#include "exfat_super.h"
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#include "exfat.h"
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#include <linux/nls.h>
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static UINT16 bad_dos_chars[] = {
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0x002B, 0x002C, 0x003B, 0x003D, 0x005B, 0x005D,
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0xFF0B, 0xFF0C, 0xFF1B, 0xFF1D, 0xFF3B, 0xFF3D,
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0
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};
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static UINT16 bad_uni_chars[] = {
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0x0022, 0x002A, 0x002F, 0x003A,
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0x003C, 0x003E, 0x003F, 0x005C, 0x007C,
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0
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};
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static INT32 convert_uni_to_ch(struct nls_table *nls, UINT8 *ch, UINT16 uni, INT32 *lossy);
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static INT32 convert_ch_to_uni(struct nls_table *nls, UINT16 *uni, UINT8 *ch, INT32 *lossy);
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UINT16 nls_upper(struct super_block *sb, UINT16 a)
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{
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FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
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if (EXFAT_SB(sb)->options.casesensitive)
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return(a);
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if ((p_fs->vol_utbl)[get_col_index(a)] != NULL)
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return (p_fs->vol_utbl)[get_col_index(a)][get_row_index(a)];
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else
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return a;
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}
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INT32 nls_dosname_cmp(struct super_block *sb, UINT8 *a, UINT8 *b)
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{
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return(STRNCMP((void *) a, (void *) b, DOS_NAME_LENGTH));
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}
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INT32 nls_uniname_cmp(struct super_block *sb, UINT16 *a, UINT16 *b)
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{
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INT32 i;
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for (i = 0; i < MAX_NAME_LENGTH; i++, a++, b++) {
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if (nls_upper(sb, *a) != nls_upper(sb, *b)) return(1);
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if (*a == 0x0) return(0);
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}
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return(0);
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}
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void nls_uniname_to_dosname(struct super_block *sb, DOS_NAME_T *p_dosname, UNI_NAME_T *p_uniname, INT32 *p_lossy)
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{
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INT32 i, j, len, lossy = FALSE;
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UINT8 buf[MAX_CHARSET_SIZE];
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UINT8 lower = 0, upper = 0;
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UINT8 *dosname = p_dosname->name;
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UINT16 *uniname = p_uniname->name;
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UINT16 *p, *last_period;
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struct nls_table *nls = EXFAT_SB(sb)->nls_disk;
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for (i = 0; i < DOS_NAME_LENGTH; i++) {
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*(dosname+i) = ' ';
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}
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if (!nls_uniname_cmp(sb, uniname, (UINT16 *) UNI_CUR_DIR_NAME)) {
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*(dosname) = '.';
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p_dosname->name_case = 0x0;
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if (p_lossy != NULL) *p_lossy = FALSE;
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return;
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}
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if (!nls_uniname_cmp(sb, uniname, (UINT16 *) UNI_PAR_DIR_NAME)) {
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*(dosname) = '.';
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*(dosname+1) = '.';
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p_dosname->name_case = 0x0;
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if (p_lossy != NULL) *p_lossy = FALSE;
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return;
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}
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last_period = NULL;
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for (p = uniname; *p; p++) {
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if (*p == (UINT16) '.') last_period = p;
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}
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i = 0;
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while (i < DOS_NAME_LENGTH) {
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if (i == 8) {
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if (last_period == NULL) break;
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if (uniname <= last_period) {
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if (uniname < last_period) lossy = TRUE;
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uniname = last_period + 1;
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}
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}
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if (*uniname == (UINT16) '\0') {
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break;
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} else if (*uniname == (UINT16) ' ') {
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lossy = TRUE;
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} else if (*uniname == (UINT16) '.') {
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if (uniname < last_period) lossy = TRUE;
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else i = 8;
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} else if (WSTRCHR(bad_dos_chars, *uniname)) {
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lossy = TRUE;
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*(dosname+i) = '_';
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i++;
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} else {
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len = convert_uni_to_ch(nls, buf, *uniname, &lossy);
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if (len > 1) {
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if ((i >= 8) && ((i+len) > DOS_NAME_LENGTH)) {
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break;
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}
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if ((i < 8) && ((i+len) > 8)) {
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i = 8;
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continue;
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}
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lower = 0xFF;
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for (j = 0; j < len; j++, i++) {
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*(dosname+i) = *(buf+j);
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}
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} else {
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if ((*buf >= 'a') && (*buf <= 'z')) {
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*(dosname+i) = *buf - ('a' - 'A');
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if (i < 8) lower |= 0x08;
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else lower |= 0x10;
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} else if ((*buf >= 'A') && (*buf <= 'Z')) {
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*(dosname+i) = *buf;
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if (i < 8) upper |= 0x08;
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else upper |= 0x10;
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} else {
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*(dosname+i) = *buf;
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}
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i++;
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}
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}
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uniname++;
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}
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if (*dosname == 0xE5) *dosname = 0x05;
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if (*uniname != 0x0) lossy = TRUE;
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if (upper & lower) p_dosname->name_case = 0xFF;
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else p_dosname->name_case = lower;
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if (p_lossy != NULL) *p_lossy = lossy;
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}
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void nls_dosname_to_uniname(struct super_block *sb, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname)
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{
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INT32 i = 0, j, n = 0;
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UINT8 buf[DOS_NAME_LENGTH+2];
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UINT8 *dosname = p_dosname->name;
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UINT16 *uniname = p_uniname->name;
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struct nls_table *nls = EXFAT_SB(sb)->nls_disk;
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if (*dosname == 0x05) {
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*buf = 0xE5;
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i++;
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n++;
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}
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for ( ; i < 8; i++, n++) {
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if (*(dosname+i) == ' ') break;
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if ((*(dosname+i) >= 'A') && (*(dosname+i) <= 'Z') && (p_dosname->name_case & 0x08))
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*(buf+n) = *(dosname+i) + ('a' - 'A');
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else
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*(buf+n) = *(dosname+i);
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}
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if (*(dosname+8) != ' ') {
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*(buf+n) = '.';
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n++;
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}
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for (i = 8; i < DOS_NAME_LENGTH; i++, n++) {
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if (*(dosname+i) == ' ') break;
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if ((*(dosname+i) >= 'A') && (*(dosname+i) <= 'Z') && (p_dosname->name_case & 0x10))
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*(buf+n) = *(dosname+i) + ('a' - 'A');
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else
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*(buf+n) = *(dosname+i);
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}
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*(buf+n) = '\0';
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i = j = 0;
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while (j < (MAX_NAME_LENGTH-1)) {
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if (*(buf+i) == '\0') break;
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i += convert_ch_to_uni(nls, uniname, (buf+i), NULL);
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uniname++;
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j++;
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}
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*uniname = (UINT16) '\0';
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}
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void nls_uniname_to_cstring(struct super_block *sb, UINT8 *p_cstring, UNI_NAME_T *p_uniname)
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{
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INT32 i, j, len;
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UINT8 buf[MAX_CHARSET_SIZE];
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UINT16 *uniname = p_uniname->name;
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struct nls_table *nls = EXFAT_SB(sb)->nls_io;
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i = 0;
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while (i < (MAX_NAME_LENGTH-1)) {
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if (*uniname == (UINT16) '\0') break;
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len = convert_uni_to_ch(nls, buf, *uniname, NULL);
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if (len > 1) {
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for (j = 0; j < len; j++)
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*p_cstring++ = (INT8) *(buf+j);
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} else {
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*p_cstring++ = (INT8) *buf;
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}
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uniname++;
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i++;
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}
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*p_cstring = '\0';
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}
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void nls_cstring_to_uniname(struct super_block *sb, UNI_NAME_T *p_uniname, UINT8 *p_cstring, INT32 *p_lossy)
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{
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INT32 i, j, lossy = FALSE;
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UINT8 *end_of_name;
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UINT16 upname[MAX_NAME_LENGTH];
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UINT16 *uniname = p_uniname->name;
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struct nls_table *nls = EXFAT_SB(sb)->nls_io;
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end_of_name = p_cstring + STRLEN((INT8 *) p_cstring);
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while (*(--end_of_name) == ' ') {
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if (end_of_name < p_cstring) break;
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}
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*(++end_of_name) = '\0';
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if (STRCMP((INT8 *) p_cstring, ".") && STRCMP((INT8 *) p_cstring, "..")) {
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while (*(--end_of_name) == '.') {
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if (end_of_name < p_cstring) break;
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}
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*(++end_of_name) = '\0';
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}
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if (*p_cstring == '\0')
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lossy = TRUE;
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i = j = 0;
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while (j < (MAX_NAME_LENGTH-1)) {
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if (*(p_cstring+i) == '\0') break;
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i += convert_ch_to_uni(nls, uniname, (UINT8 *)(p_cstring+i), &lossy);
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if ((*uniname < 0x0020) || WSTRCHR(bad_uni_chars, *uniname))
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lossy = TRUE;
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*(upname+j) = nls_upper(sb, *uniname);
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uniname++;
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j++;
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}
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if (*(p_cstring+i) != '\0')
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lossy = TRUE;
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*uniname = (UINT16) '\0';
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p_uniname->name_len = j;
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p_uniname->name_hash = calc_checksum_2byte((void *) upname, j<<1, 0, CS_DEFAULT);
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if (p_lossy != NULL)
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*p_lossy = lossy;
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}
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static INT32 convert_ch_to_uni(struct nls_table *nls, UINT16 *uni, UINT8 *ch, INT32 *lossy)
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{
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int len;
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*uni = 0x0;
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if (ch[0] < 0x80) {
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*uni = (UINT16) ch[0];
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return(1);
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}
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if ((len = nls->char2uni(ch, NLS_MAX_CHARSET_SIZE, uni)) < 0) {
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printk("%s: fail to use nls \n", __func__);
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if (lossy != NULL)
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*lossy = TRUE;
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*uni = (UINT16) '_';
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if (!strcmp(nls->charset, "utf8")) return(1);
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else return(2);
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}
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return(len);
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}
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static INT32 convert_uni_to_ch(struct nls_table *nls, UINT8 *ch, UINT16 uni, INT32 *lossy)
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{
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int len;
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ch[0] = 0x0;
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if (uni < 0x0080) {
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ch[0] = (UINT8) uni;
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return(1);
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}
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if ((len = nls->uni2char(uni, ch, NLS_MAX_CHARSET_SIZE)) < 0) {
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printk("%s: fail to use nls \n", __func__);
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if (lossy != NULL) *lossy = TRUE;
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ch[0] = '_';
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return(1);
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}
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return(len);
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}
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