4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 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
40 #define HEXDIGITS DIGITS "abcdefABCDEF"
42 #define streq(a,b) (strcmp((a),(b)) == 0)
43 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
44 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
45 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
47 int strcmp_ptr(const char *a, const char *b) _pure_;
49 static inline bool streq_ptr(const char *a, const char *b) {
50 return strcmp_ptr(a, b) == 0;
53 static inline const char* strempty(const char *s) {
57 static inline const char* strnull(const char *s) {
58 return s ? s : "(null)";
61 static inline const char *strna(const char *s) {
65 static inline bool isempty(const char *p) {
69 static inline char *startswith(const char *s, const char *prefix) {
73 if (strncmp(s, prefix, l) == 0)
79 static inline char *startswith_no_case(const char *s, const char *prefix) {
83 if (strncasecmp(s, prefix, l) == 0)
89 char *endswith(const char *s, const char *postfix) _pure_;
90 char *endswith_no_case(const char *s, const char *postfix) _pure_;
92 char *first_word(const char *s, const char *word) _pure_;
94 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
96 #define FOREACH_WORD(word, length, s, state) \
97 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
99 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
100 _FOREACH_WORD(word, length, s, separator, false, state)
102 #define FOREACH_WORD_QUOTED(word, length, s, state) \
103 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
105 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
106 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
108 char *strappend(const char *s, const char *suffix);
109 char *strnappend(const char *s, const char *suffix, size_t length);
111 char *strjoin(const char *x, ...) _sentinel_;
113 #define strjoina(a, ...) \
115 const char *_appendees_[] = { a, __VA_ARGS__ }; \
119 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
120 _len_ += strlen(_appendees_[_i_]); \
121 _p_ = _d_ = alloca(_len_ + 1); \
122 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
123 _p_ = stpcpy(_p_, _appendees_[_i_]); \
128 char *strstrip(char *s);
129 char *delete_chars(char *s, const char *bad);
130 char *truncate_nl(char *s);
132 char ascii_tolower(char x);
133 char *ascii_strlower(char *s);
134 char *ascii_strlower_n(char *s, size_t n);
136 int ascii_strcasecmp_n(const char *a, const char *b, size_t n);
137 int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m);
139 bool chars_intersect(const char *a, const char *b) _pure_;
141 static inline bool _pure_ in_charset(const char *s, const char* charset) {
144 return s[strspn(s, charset)] == '\0';
147 bool string_has_cc(const char *p, const char *ok) _pure_;
149 char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
150 char *ellipsize(const char *s, size_t length, unsigned percent);
152 bool nulstr_contains(const char*nulstr, const char *needle);
154 char* strshorten(char *s, size_t l);
156 char *strreplace(const char *text, const char *old_string, const char *new_string);
158 char *strip_tab_ansi(char **p, size_t *l);
160 char *strextend(char **x, ...) _sentinel_;
162 char *strrep(const char *s, unsigned n);
164 int split_pair(const char *s, const char *sep, char **l, char **r);
166 int free_and_strdup(char **p, const char *s);
168 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
169 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
172 return (void*) haystack;
174 if (haystacklen < needlelen)
180 return memmem(haystack, haystacklen, needle, needlelen);
183 void* memory_erase(void *p, size_t l);
184 char *string_erase(char *x);
186 char *string_free_erase(char *s);
187 DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
188 #define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)
190 bool string_is_safe(const char *p) _pure_;