2 * encoding.c --- convert between encoding magic numbers and strings
4 * Copyright (C) 2018 Collabora Ltd.
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
22 #define ARRAY_SIZE(array) \
23 (sizeof(array) / sizeof(array[0]))
30 } ext4_encoding_map[] = {
32 .encoding_magic = EXT4_ENC_UTF8_12_1,
37 .encoding_magic = EXT4_ENC_UTF8_12_1,
43 static const struct enc_flags {
46 } encoding_flags[] = {
47 { EXT4_ENC_STRICT_MODE_FL, "strict" },
50 /* Return a positive number < 0xff indicating the encoding magic number
51 * or a negative value indicating error. */
52 int e2p_str2encoding(const char *string)
56 for (i = 0 ; i < ARRAY_SIZE(ext4_encoding_map); i++)
57 if (!strcmp(string, ext4_encoding_map[i].name))
58 return ext4_encoding_map[i].encoding_magic;
63 /* Return the name of an encoding or NULL */
64 const char *e2p_encoding2str(int encoding)
69 for (i = 0 ; i < ARRAY_SIZE(ext4_encoding_map); i++)
70 if (ext4_encoding_map[i].encoding_magic == encoding)
71 return ext4_encoding_map[i].name;
72 sprintf(buf, "UNKNOWN_ENCODING_%d", encoding);
76 int e2p_get_encoding_flags(int encoding)
80 for (i = 0 ; i < ARRAY_SIZE(ext4_encoding_map); i++)
81 if (ext4_encoding_map[i].encoding_magic == encoding)
82 return ext4_encoding_map[i].default_flags;
87 int e2p_str2encoding_flags(int encoding, char *param, __u16 *flags)
89 char *f = strtok(param, "-");
90 const struct enc_flags *fl;
91 unsigned int i, neg = 0;
93 if (encoding != EXT4_ENC_UTF8_12_1)
97 if (!strncmp("no", f, 2)) {
102 for (i = 0; i < ARRAY_SIZE(encoding_flags); i++) {
103 fl = &encoding_flags[i];
104 if (!strcmp(fl->param, f)) {
115 f = strtok(NULL, "-");