mirror of
https://github.com/AsahiLinux/u-boot
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352 lines
8.1 KiB
C
352 lines
8.1 KiB
C
/*
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* (C) Copyright 2002
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* Stäubli Faverges - <www.staubli.com>
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* Pierre AUBERT p.aubert@staubli.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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 as
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* published by the Free Software Foundation; either version 2 of
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* 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., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <config.h>
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#include <linux/ctype.h>
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#include "dos.h"
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#include "fdos.h"
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static int dir_read (Fs_t *fs,
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Slot_t *dir,
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Directory_t *dirent,
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int num,
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struct vfat_state *v);
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static int unicode_read (char *in, char *out, int num);
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static int match (const char *s, const char *p);
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static unsigned char sum_shortname (char *name);
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static int check_vfat (struct vfat_state *v, Directory_t *dir);
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static char *conv_name (char *name, char *ext, char Case, char *ans);
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/*-----------------------------------------------------------------------------
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* clear_vfat --
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*-----------------------------------------------------------------------------
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*/
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static void clear_vfat (struct vfat_state *v)
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{
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v -> subentries = 0;
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v -> status = 0;
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}
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/*-----------------------------------------------------------------------------
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* vfat_lookup --
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*-----------------------------------------------------------------------------
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*/
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int vfat_lookup (Slot_t *dir,
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Fs_t *fs,
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Directory_t *dirent,
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int *entry,
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int *vfat_start,
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char *filename,
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int flags,
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char *outname,
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Slot_t *file)
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{
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int found;
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struct vfat_state vfat;
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char newfile [VSE_NAMELEN];
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int vfat_present = 0;
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if (*entry == -1) {
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return -1;
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}
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found = 0;
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clear_vfat (&vfat);
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while (1) {
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if (dir_read (fs, dir, dirent, *entry, &vfat) < 0) {
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if (vfat_start) {
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*vfat_start = *entry;
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}
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break;
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}
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(*entry)++;
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/* Empty slot */
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if (dirent -> name[0] == '\0'){
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if (vfat_start == 0) {
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break;
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}
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continue;
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}
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if (dirent -> attr == ATTR_VSE) {
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/* VSE entry, continue */
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continue;
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}
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if ( (dirent -> name [0] == DELMARK) ||
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((dirent -> attr & ATTR_DIRECTORY) != 0 &&
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(flags & ACCEPT_DIR) == 0) ||
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((dirent -> attr & ATTR_VOLUME) != 0 &&
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(flags & ACCEPT_LABEL) == 0) ||
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(((dirent -> attr & (ATTR_DIRECTORY | ATTR_VOLUME)) == 0) &&
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(flags & ACCEPT_PLAIN) == 0)) {
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clear_vfat (&vfat);
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continue;
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}
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vfat_present = check_vfat (&vfat, dirent);
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if (vfat_start) {
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*vfat_start = *entry - 1;
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if (vfat_present) {
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*vfat_start -= vfat.subentries;
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}
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}
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if (dirent -> attr & ATTR_VOLUME) {
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strncpy (newfile, dirent -> name, 8);
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newfile [8] = '\0';
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strncat (newfile, dirent -> ext, 3);
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newfile [11] = '\0';
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}
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else {
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conv_name (dirent -> name, dirent -> ext, dirent -> Case, newfile);
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}
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if (flags & MATCH_ANY) {
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found = 1;
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break;
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}
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if ((vfat_present && match (vfat.name, filename)) ||
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(match (newfile, filename))) {
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found = 1;
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break;
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}
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clear_vfat (&vfat);
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}
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if (found) {
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if ((flags & DO_OPEN) && file) {
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if (open_file (file, dirent) < 0) {
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return (-1);
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}
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}
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if (outname) {
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if (vfat_present) {
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strcpy (outname, vfat.name);
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}
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else {
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strcpy (outname, newfile);
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}
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}
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return (0); /* File found */
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} else {
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*entry = -1;
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return -1; /* File not found */
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}
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}
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/*-----------------------------------------------------------------------------
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* dir_read -- Read one directory entry
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*-----------------------------------------------------------------------------
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*/
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static int dir_read (Fs_t *fs,
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Slot_t *dir,
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Directory_t *dirent,
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int num,
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struct vfat_state *v)
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{
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/* read the directory entry */
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if (read_file (fs,
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dir,
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(char *)dirent,
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num * MDIR_SIZE,
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MDIR_SIZE) != MDIR_SIZE) {
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return (-1);
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}
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if (v && (dirent -> attr == ATTR_VSE)) {
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struct vfat_subentry *vse;
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unsigned char id, last_flag;
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char *c;
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vse = (struct vfat_subentry *) dirent;
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id = vse -> id & VSE_MASK;
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last_flag = (vse -> id & VSE_LAST);
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if (id > MAX_VFAT_SUBENTRIES) {
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/* Invalid VSE entry */
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return (-1);
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}
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/* Decode VSE */
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if(v -> sum != vse -> sum) {
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clear_vfat (v);
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v -> sum = vse -> sum;
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}
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v -> status |= 1 << (id - 1);
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if (last_flag) {
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v -> subentries = id;
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}
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c = &(v -> name [VSE_NAMELEN * (id - 1)]);
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c += unicode_read (vse->text1, c, VSE1SIZE);
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c += unicode_read (vse->text2, c, VSE2SIZE);
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c += unicode_read (vse->text3, c, VSE3SIZE);
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if (last_flag) {
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*c = '\0'; /* Null terminate long name */
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}
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}
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return (0);
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}
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/*-----------------------------------------------------------------------------
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* unicode_read --
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*-----------------------------------------------------------------------------
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*/
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static int unicode_read (char *in, char *out, int num)
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{
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int j;
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for (j = 0; j < num; ++j) {
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if (in [1])
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*out = '_';
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else
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*out = in [0];
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out ++;
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in += 2;
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}
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return num;
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}
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/*-----------------------------------------------------------------------------
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* match --
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*-----------------------------------------------------------------------------
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*/
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static int match (const char *s, const char *p)
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{
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for (; *p != '\0'; ) {
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if (toupper (*s) != toupper (*p)) {
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return (0);
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}
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p++;
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s++;
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}
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if (*s != '\0') {
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return (0);
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}
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else {
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return (1);
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}
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}
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/*-----------------------------------------------------------------------------
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* sum_shortname --
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*-----------------------------------------------------------------------------
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*/
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static unsigned char sum_shortname (char *name)
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{
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unsigned char sum;
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int j;
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for (j = sum = 0; j < 11; ++j) {
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sum = ((sum & 1) ? 0x80 : 0) + (sum >> 1) +
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(name [j] ? name [j] : ' ');
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}
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return (sum);
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}
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/*-----------------------------------------------------------------------------
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* check_vfat --
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* Return 1 if long name is valid, 0 else
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*-----------------------------------------------------------------------------
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*/
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static int check_vfat (struct vfat_state *v, Directory_t *dir)
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{
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char name[12];
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if (v -> subentries == 0) {
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return 0;
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}
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strncpy (name, dir -> name, 8);
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strncpy (name + 8, dir -> ext, 3);
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name [11] = '\0';
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if (v -> sum != sum_shortname (name)) {
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return 0;
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}
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if( (v -> status & ((1 << v -> subentries) - 1)) !=
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(1 << v -> subentries) - 1) {
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return 0;
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}
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v->name [VSE_NAMELEN * v -> subentries] = 0;
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return 1;
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}
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/*-----------------------------------------------------------------------------
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* conv_name --
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*-----------------------------------------------------------------------------
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*/
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static char *conv_name (char *name, char *ext, char Case, char *ans)
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{
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char tname [9], text [4];
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int i;
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i = 0;
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while (i < 8 && name [i] != ' ' && name [i] != '\0') {
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tname [i] = name [i];
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i++;
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}
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tname [i] = '\0';
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if (Case & BASECASE) {
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for (i = 0; i < 8 && tname [i]; i++) {
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tname [i] = tolower (tname [i]);
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}
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}
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i = 0;
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while (i < 3 && ext [i] != ' ' && ext [i] != '\0') {
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text [i] = ext [i];
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i++;
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}
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text [i] = '\0';
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if (Case & EXTCASE){
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for (i = 0; i < 3 && text [i]; i++) {
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text [i] = tolower (text [i]);
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}
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}
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if (*text) {
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strcpy (ans, tname);
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strcat (ans, ".");
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strcat (ans, text);
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}
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else {
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strcpy(ans, tname);
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}
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return (ans);
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}
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