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1 | /* liblxcapi |
2 | * | |
3 | * Copyright © 2018 Christian Brauner <christian.brauner@ubuntu.com>. | |
4 | * Copyright © 2018 Canonical Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
20 | #ifndef __LXC_STRING_UTILS_H | |
21 | #define __LXC_STRING_UTILS_H | |
22 | ||
23 | #include "config.h" | |
24 | ||
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25 | #include "initutils.h" |
26 | #include "macro.h" | |
27 | ||
28 | /* convert variadic argument lists to arrays (for execl type argument lists) */ | |
29 | extern char **lxc_va_arg_list_to_argv(va_list ap, size_t skip, int do_strdup); | |
30 | extern const char **lxc_va_arg_list_to_argv_const(va_list ap, size_t skip); | |
31 | ||
32 | /* | |
33 | * Some simple string functions; if they return pointers, they are allocated | |
34 | * buffers. | |
35 | */ | |
36 | extern char *lxc_string_replace(const char *needle, const char *replacement, | |
37 | const char *haystack); | |
38 | extern bool lxc_string_in_array(const char *needle, const char **haystack); | |
39 | extern char *lxc_string_join(const char *sep, const char **parts, | |
40 | bool use_as_prefix); | |
41 | /* | |
42 | * Normalize and split path: Leading and trailing / are removed, multiple | |
43 | * / are compactified, .. and . are resolved (.. on the top level is considered | |
44 | * identical to .). | |
45 | * Examples: | |
46 | * / -> { NULL } | |
47 | * foo/../bar -> { bar, NULL } | |
48 | * ../../ -> { NULL } | |
49 | * ./bar/baz/.. -> { bar, NULL } | |
50 | * foo//bar -> { foo, bar, NULL } | |
51 | */ | |
52 | extern char **lxc_normalize_path(const char *path); | |
53 | ||
54 | /* remove multiple slashes from the path, e.g. ///foo//bar -> /foo/bar */ | |
55 | extern char *lxc_deslashify(const char *path); | |
56 | extern char *lxc_append_paths(const char *first, const char *second); | |
57 | ||
58 | /* | |
59 | * Note: the following two functions use strtok(), so they will never | |
60 | * consider an empty element, even if two delimiters are next to | |
61 | * each other. | |
62 | */ | |
63 | extern bool lxc_string_in_list(const char *needle, const char *haystack, | |
64 | char sep); | |
65 | extern char **lxc_string_split(const char *string, char sep); | |
66 | extern char **lxc_string_split_and_trim(const char *string, char sep); | |
67 | extern char **lxc_string_split_quoted(char *string); | |
68 | ||
69 | /* Append string to NULL-terminated string array. */ | |
70 | extern int lxc_append_string(char ***list, char *entry); | |
71 | ||
72 | /* Some simple array manipulation utilities */ | |
73 | typedef void (*lxc_free_fn)(void *); | |
74 | typedef void *(*lxc_dup_fn)(void *); | |
75 | extern int lxc_grow_array(void ***array, size_t *capacity, size_t new_size, | |
76 | size_t capacity_increment); | |
77 | extern void lxc_free_array(void **array, lxc_free_fn element_free_fn); | |
78 | extern size_t lxc_array_len(void **array); | |
79 | ||
80 | extern void **lxc_append_null_to_array(void **array, size_t count); | |
81 | extern void remove_trailing_newlines(char *l); | |
82 | ||
83 | /* Helper functions to parse numbers. */ | |
84 | extern int lxc_safe_uint(const char *numstr, unsigned int *converted); | |
85 | extern int lxc_safe_int(const char *numstr, int *converted); | |
86 | extern int lxc_safe_long(const char *numstr, long int *converted); | |
87 | extern int lxc_safe_long_long(const char *numstr, long long int *converted); | |
88 | extern int lxc_safe_ulong(const char *numstr, unsigned long *converted); | |
89 | extern int lxc_safe_uint64(const char *numstr, uint64_t *converted, int base); | |
90 | /* Handles B, kb, MB, GB. Detects overflows and reports -ERANGE. */ | |
91 | extern int parse_byte_size_string(const char *s, int64_t *converted); | |
92 | ||
93 | /* | |
94 | * Concatenate all passed-in strings into one path. Do not fail. If any piece | |
95 | * is not prefixed with '/', add a '/'. | |
96 | */ | |
97 | __attribute__((sentinel)) extern char *must_concat(const char *first, ...); | |
98 | __attribute__((sentinel)) extern char *must_make_path(const char *first, ...); | |
99 | __attribute__((sentinel)) extern char *must_append_path(char *first, ...); | |
100 | ||
101 | /* Return copy of string @entry. Do not fail. */ | |
102 | extern char *must_copy_string(const char *entry); | |
103 | ||
54d423b8 | 104 | /* Re-allocate a pointer, do not fail */ |
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105 | extern void *must_realloc(void *orig, size_t sz); |
106 | ||
107 | extern int lxc_char_left_gc(const char *buffer, size_t len); | |
108 | ||
109 | extern int lxc_char_right_gc(const char *buffer, size_t len); | |
110 | ||
111 | extern char *lxc_trim_whitespace_in_place(char *buffer); | |
112 | ||
113 | extern int lxc_is_line_empty(const char *line); | |
dca12ddf | 114 | extern void remove_trailing_slashes(char *p); |
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115 | |
116 | #endif /* __LXC_STRING_UTILS_H */ |