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 const char *empty_to_null(const char *p) {
70 return isempty(p) ? NULL : p;
73 static inline const char *strdash_if_empty(const char *str) {
74 return isempty(str) ? "-" : str;
77 static inline char *startswith(const char *s, const char *prefix) {
81 if (strncmp(s, prefix, l) == 0)
87 static inline char *startswith_no_case(const char *s, const char *prefix) {
91 if (strncasecmp(s, prefix, l) == 0)
97 char *endswith(const char *s, const char *postfix) _pure_;
98 char *endswith_no_case(const char *s, const char *postfix) _pure_;
100 char *first_word(const char *s, const char *word) _pure_;
102 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
104 #define FOREACH_WORD(word, length, s, state) \
105 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
107 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
108 _FOREACH_WORD(word, length, s, separator, false, state)
110 #define FOREACH_WORD_QUOTED(word, length, s, state) \
111 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
113 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
114 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
116 char *strappend(const char *s, const char *suffix);
117 char *strnappend(const char *s, const char *suffix, size_t length);
119 char *strjoin(const char *x, ...) _sentinel_;
121 #define strjoina(a, ...) \
123 const char *_appendees_[] = { a, __VA_ARGS__ }; \
127 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
128 _len_ += strlen(_appendees_[_i_]); \
129 _p_ = _d_ = alloca(_len_ + 1); \
130 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
131 _p_ = stpcpy(_p_, _appendees_[_i_]); \
136 char *strstrip(char *s);
137 char *delete_chars(char *s, const char *bad);
138 char *truncate_nl(char *s);
140 char ascii_tolower(char x);
141 char *ascii_strlower(char *s);
142 char *ascii_strlower_n(char *s, size_t n);
144 char ascii_toupper(char x);
145 char *ascii_strupper(char *s);
147 int ascii_strcasecmp_n(const char *a, const char *b, size_t n);
148 int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m);
150 bool chars_intersect(const char *a, const char *b) _pure_;
152 static inline bool _pure_ in_charset(const char *s, const char* charset) {
155 return s[strspn(s, charset)] == '\0';
158 bool string_has_cc(const char *p, const char *ok) _pure_;
160 char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
161 char *ellipsize(const char *s, size_t length, unsigned percent);
163 bool nulstr_contains(const char*nulstr, const char *needle);
165 char* strshorten(char *s, size_t l);
167 char *strreplace(const char *text, const char *old_string, const char *new_string);
169 char *strip_tab_ansi(char **p, size_t *l);
171 char *strextend(char **x, ...) _sentinel_;
173 char *strrep(const char *s, unsigned n);
175 int split_pair(const char *s, const char *sep, char **l, char **r);
177 int free_and_strdup(char **p, const char *s);
179 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
180 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
183 return (void*) haystack;
185 if (haystacklen < needlelen)
191 return memmem(haystack, haystacklen, needle, needlelen);
194 void* memory_erase(void *p, size_t l);
195 char *string_erase(char *x);
197 char *string_free_erase(char *s);
198 DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
199 #define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)
201 bool string_is_safe(const char *p) _pure_;