blob: 9240d5a7bff6ccf9316672c2b144dc75c7566055 [file] [log] [blame]
/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <gpt.h>
#include <string.h>
static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out)
{
uint8_t *name = (uint8_t *)str_in;
int i;
assert((str_in != NULL) && (str_out != NULL) && (name[0] != '\0'));
/* check whether the unicode string is valid */
for (i = 1; i < (EFI_NAMELEN << 1); i += 2) {
if (name[i] != '\0')
return -EINVAL;
}
/* convert the unicode string to ascii string */
for (i = 0; i < (EFI_NAMELEN << 1); i += 2) {
str_out[i >> 1] = name[i];
if (name[i] == '\0')
break;
}
return 0;
}
int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry)
{
int result;
assert((gpt_entry != 0) && (entry != 0));
if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) {
return -EINVAL;
}
memset(entry, 0, sizeof(partition_entry_t));
result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name);
if (result != 0) {
return result;
}
entry->start = (uint64_t)gpt_entry->first_lba * PARTITION_BLOCK_SIZE;
entry->length = (uint64_t)(gpt_entry->last_lba -
gpt_entry->first_lba + 1) *
PARTITION_BLOCK_SIZE;
return 0;
}