diff options
Diffstat (limited to 'e2fsprogs/e2p/hashstr.c')
-rw-r--r-- | e2fsprogs/e2p/hashstr.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/e2fsprogs/e2p/hashstr.c b/e2fsprogs/e2p/hashstr.c new file mode 100644 index 000000000..697ffadc3 --- /dev/null +++ b/e2fsprogs/e2p/hashstr.c | |||
@@ -0,0 +1,70 @@ | |||
1 | /* vi: set sw=4 ts=4: */ | ||
2 | /* | ||
3 | * feature.c --- convert between features and strings | ||
4 | * | ||
5 | * Copyright (C) 1999 Theodore Ts'o <tytso@mit.edu> | ||
6 | * | ||
7 | * This file can be redistributed under the terms of the GNU Library General | ||
8 | * Public License | ||
9 | * | ||
10 | */ | ||
11 | |||
12 | #include <stdio.h> | ||
13 | #include <stdlib.h> | ||
14 | #include <string.h> | ||
15 | #include <ctype.h> | ||
16 | #include <errno.h> | ||
17 | |||
18 | #include "e2p.h" | ||
19 | |||
20 | struct hash { | ||
21 | int num; | ||
22 | const char *string; | ||
23 | }; | ||
24 | |||
25 | static const struct hash hash_list[] = { | ||
26 | { EXT2_HASH_LEGACY, "legacy" }, | ||
27 | { EXT2_HASH_HALF_MD4, "half_md4" }, | ||
28 | { EXT2_HASH_TEA, "tea" }, | ||
29 | { 0, 0 }, | ||
30 | }; | ||
31 | |||
32 | const char *e2p_hash2string(int num) | ||
33 | { | ||
34 | const struct hash *p; | ||
35 | static char buf[20]; | ||
36 | |||
37 | for (p = hash_list; p->string; p++) { | ||
38 | if (num == p->num) | ||
39 | return p->string; | ||
40 | } | ||
41 | sprintf(buf, "HASHALG_%d", num); | ||
42 | return buf; | ||
43 | } | ||
44 | |||
45 | /* | ||
46 | * Returns the hash algorithm, or -1 on error | ||
47 | */ | ||
48 | int e2p_string2hash(char *string) | ||
49 | { | ||
50 | const struct hash *p; | ||
51 | char *eptr; | ||
52 | int num; | ||
53 | |||
54 | for (p = hash_list; p->string; p++) { | ||
55 | if (!strcasecmp(string, p->string)) { | ||
56 | return p->num; | ||
57 | } | ||
58 | } | ||
59 | if (strncasecmp(string, "HASHALG_", 8)) | ||
60 | return -1; | ||
61 | |||
62 | if (string[8] == 0) | ||
63 | return -1; | ||
64 | num = strtol(string+8, &eptr, 10); | ||
65 | if (num > 255 || num < 0) | ||
66 | return -1; | ||
67 | if (*eptr) | ||
68 | return -1; | ||
69 | return num; | ||
70 | } | ||