projects / thirdparty / e2fsprogs.git / blame
| Commit | Line | Data |
|---|---|---|
| c2f9875c GKB |
1 | /* |
| 2 | * Copyright (c) 2018 Collabora Ltd. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it would be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | */ | |
| 15 | ||
| 16 | /* | |
| 17 | * This code is adapted from the Linux Kernel. We have a | |
| 18 | * userspace version here such that the hashes will match that | |
| 19 | * implementation. | |
| 20 | */ | |
| 21 | ||
| 22 | #include "nls.h" | |
| 23 | #include "utf8n.h" | |
| 24 | ||
| 25 | #include <limits.h> | |
| 26 | #include <errno.h> | |
| 27 | ||
| 28 | static int utf8_casefold(const struct nls_table *table, | |
| 29 | const unsigned char *str, size_t len, | |
| 30 | unsigned char *dest, size_t dlen) | |
| 31 | { | |
| 32 | const struct utf8data *data = utf8nfkdicf(table->version); | |
| 33 | struct utf8cursor cur; | |
| 34 | size_t nlen = 0; | |
| 35 | ||
| 36 | if (utf8ncursor(&cur, data, str, len) < 0) | |
| 37 | goto invalid_seq; | |
| 38 | ||
| 39 | for (nlen = 0; nlen < dlen; nlen++) { | |
| 40 | dest[nlen] = utf8byte(&cur); | |
| 41 | if (!dest[nlen]) | |
| 42 | return nlen; | |
| 43 | if (dest[nlen] == -1) | |
| 44 | break; | |
| 45 | } | |
| 46 | ||
| 47 | return -ENAMETOOLONG; | |
| 48 | ||
| 49 | invalid_seq: | |
| 50 | if (dlen < len) | |
| 51 | return -ENAMETOOLONG; | |
| 52 | ||
| 53 | /* Signal invalid sequence */ | |
| 54 | return -EINVAL; | |
| 55 | } | |
| 56 | ||
| 57 | static int utf8_normalize(const struct nls_table *table, | |
| 58 | const unsigned char *str, size_t len, | |
| 59 | unsigned char *dest, size_t dlen) | |
| 60 | { | |
| 61 | const struct utf8data *data = utf8nfkdi(table->version); | |
| 62 | struct utf8cursor cur; | |
| 63 | ssize_t nlen = 0; | |
| 64 | ||
| 65 | if (utf8ncursor(&cur, data, str, len) < 0) | |
| 66 | goto invalid_seq; | |
| 67 | ||
| 68 | for (nlen = 0; nlen < dlen; nlen++) { | |
| 69 | dest[nlen] = utf8byte(&cur); | |
| 70 | if (!dest[nlen]) | |
| 71 | return nlen; | |
| 72 | if (dest[nlen] == -1) | |
| 73 | break; | |
| 74 | } | |
| 75 | ||
| 76 | return -ENAMETOOLONG; | |
| 77 | ||
| 78 | invalid_seq: | |
| 79 | if (dlen < len) | |
| 80 | return -ENAMETOOLONG; | |
| 81 | ||
| 82 | /* Signal invalid sequence */ | |
| 83 | return -EINVAL; | |
| 84 | } | |
| 85 | ||
| 86 | const static struct nls_ops utf8_ops = { | |
| 87 | .casefold = utf8_casefold, | |
| 88 | .normalize = utf8_normalize, | |
| 89 | ||
| 90 | }; | |
| 91 | ||
| 92 | const struct nls_table nls_utf8_11_0 = { | |
| 93 | .ops = &utf8_ops, | |
| 94 | .version = UNICODE_AGE(11, 0, 0), | |
| 95 | }; |