1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 /* What is interpreted as whitespace? */
30 #define WHITESPACE " \t\n\r"
31 #define NEWLINE "\n\r"
34 #define GLOB_CHARS "*?["
35 #define DIGITS "0123456789"
36 #define LOWERCASE_LETTERS "abcdefghijklmnopqrstuvwxyz"
37 #define UPPERCASE_LETTERS "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
38 #define LETTERS LOWERCASE_LETTERS UPPERCASE_LETTERS
39 #define ALPHANUMERICAL LETTERS DIGITS
41 #define streq(a,b) (strcmp((a),(b)) == 0)
42 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
43 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
44 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
46 int strcmp_ptr(const char *a, const char *b) _pure_;
48 static inline bool streq_ptr(const char *a, const char *b) {
49 return strcmp_ptr(a, b) == 0;
52 static inline const char* strempty(const char *s) {
56 static inline const char* strnull(const char *s) {
57 return s ? s : "(null)";
60 static inline const char *strna(const char *s) {
64 static inline bool isempty(const char *p) {
68 static inline char *startswith(const char *s, const char *prefix) {
72 if (strncmp(s, prefix, l) == 0)
78 static inline char *startswith_no_case(const char *s, const char *prefix) {
82 if (strncasecmp(s, prefix, l) == 0)
88 char *endswith(const char *s, const char *postfix) _pure_;
89 char *endswith_no_case(const char *s, const char *postfix) _pure_;
91 char *first_word(const char *s, const char *word) _pure_;
93 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
95 #define FOREACH_WORD(word, length, s, state) \
96 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
98 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
99 _FOREACH_WORD(word, length, s, separator, false, state)
101 #define FOREACH_WORD_QUOTED(word, length, s, state) \
102 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
104 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
105 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
107 char *strappend(const char *s, const char *suffix);
108 char *strnappend(const char *s, const char *suffix, size_t length);
110 char *strjoin(const char *x, ...) _sentinel_;
112 #define strjoina(a, ...) \
114 const char *_appendees_[] = { a, __VA_ARGS__ }; \
118 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
119 _len_ += strlen(_appendees_[_i_]); \
120 _p_ = _d_ = alloca(_len_ + 1); \
121 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
122 _p_ = stpcpy(_p_, _appendees_[_i_]); \
127 char *strstrip(char *s);
128 char *delete_chars(char *s, const char *bad);
129 char *truncate_nl(char *s);
131 char *ascii_strlower(char *path);
133 bool chars_intersect(const char *a, const char *b) _pure_;
135 static inline bool _pure_ in_charset(const char *s, const char* charset) {
138 return s[strspn(s, charset)] == '\0';
141 bool string_has_cc(const char *p, const char *ok) _pure_;
143 char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
144 char *ellipsize(const char *s, size_t length, unsigned percent);
146 bool nulstr_contains(const char*nulstr, const char *needle);
148 char* strshorten(char *s, size_t l);
150 char *strreplace(const char *text, const char *old_string, const char *new_string);
152 char *strip_tab_ansi(char **p, size_t *l);
154 char *strextend(char **x, ...) _sentinel_;
156 char *strrep(const char *s, unsigned n);
158 int split_pair(const char *s, const char *sep, char **l, char **r);
160 int free_and_strdup(char **p, const char *s);
162 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
163 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
166 return (void*) haystack;
168 if (haystacklen < needlelen)
174 return memmem(haystack, haystacklen, needle, needlelen);
177 void* memory_erase(void *p, size_t l);
178 char *string_erase(char *x);
180 char *string_free_erase(char *s);
181 DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
182 #define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)
184 bool string_is_safe(const char *p) _pure_;