diff options
Diffstat (limited to 'drivers/partition/gpt.c')
-rw-r--r-- | drivers/partition/gpt.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/partition/gpt.c b/drivers/partition/gpt.c new file mode 100644 index 00000000..9cc917d3 --- /dev/null +++ b/drivers/partition/gpt.c @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <debug.h> +#include <errno.h> +#include <gpt.h> +#include <string.h> +#include <utils.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; + } + + zeromem(entry, 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; +} |