| Haojian Zhuang | 91f5646 | 2016-07-28 14:19:36 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <assert.h> |
| 32 | #include <debug.h> |
| 33 | #include <errno.h> |
| 34 | #include <gpt.h> |
| 35 | #include <string.h> |
| 36 | |
| 37 | static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out) |
| 38 | { |
| 39 | uint8_t *name = (uint8_t *)str_in; |
| 40 | int i; |
| 41 | |
| 42 | assert((str_in != NULL) && (str_out != NULL) && (name[0] != '\0')); |
| 43 | |
| 44 | /* check whether the unicode string is valid */ |
| 45 | for (i = 1; i < (EFI_NAMELEN << 1); i += 2) { |
| 46 | if (name[i] != '\0') |
| 47 | return -EINVAL; |
| 48 | } |
| 49 | /* convert the unicode string to ascii string */ |
| 50 | for (i = 0; i < (EFI_NAMELEN << 1); i += 2) { |
| 51 | str_out[i >> 1] = name[i]; |
| 52 | if (name[i] == '\0') |
| 53 | break; |
| 54 | } |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry) |
| 59 | { |
| 60 | int result; |
| 61 | |
| 62 | assert((gpt_entry != 0) && (entry != 0)); |
| 63 | |
| 64 | if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) { |
| 65 | return -EINVAL; |
| 66 | } |
| 67 | |
| 68 | memset(entry, 0, sizeof(partition_entry_t)); |
| 69 | result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name); |
| 70 | if (result != 0) { |
| 71 | return result; |
| 72 | } |
| 73 | entry->start = (uint64_t)gpt_entry->first_lba * PARTITION_BLOCK_SIZE; |
| 74 | entry->length = (uint64_t)(gpt_entry->last_lba - |
| 75 | gpt_entry->first_lba + 1) * |
| 76 | PARTITION_BLOCK_SIZE; |
| 77 | return 0; |
| 78 | } |