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 char *startswith(const char *s, const char *prefix) {
77 if (strncmp(s, prefix, l) == 0)
83 static inline char *startswith_no_case(const char *s, const char *prefix) {
87 if (strncasecmp(s, prefix, l) == 0)
93 char *endswith(const char *s, const char *postfix) _pure_;
94 char *endswith_no_case(const char *s, const char *postfix) _pure_;
96 char *first_word(const char *s, const char *word) _pure_;
98 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
100 #define FOREACH_WORD(word, length, s, state) \
101 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
103 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
104 _FOREACH_WORD(word, length, s, separator, false, state)
106 #define FOREACH_WORD_QUOTED(word, length, s, state) \
107 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
109 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
110 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
112 char *strappend(const char *s, const char *suffix);
113 char *strnappend(const char *s, const char *suffix, size_t length);
115 char *strjoin(const char *x, ...) _sentinel_;
117 #define strjoina(a, ...) \
119 const char *_appendees_[] = { a, __VA_ARGS__ }; \
123 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
124 _len_ += strlen(_appendees_[_i_]); \
125 _p_ = _d_ = alloca(_len_ + 1); \
126 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
127 _p_ = stpcpy(_p_, _appendees_[_i_]); \
132 char *strstrip(char *s);
133 char *delete_chars(char *s, const char *bad);
134 char *truncate_nl(char *s);
136 char ascii_tolower(char x);
137 char *ascii_strlower(char *s);
138 char *ascii_strlower_n(char *s, size_t n);
140 int ascii_strcasecmp_n(const char *a, const char *b, size_t n);
141 int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m);
143 bool chars_intersect(const char *a, const char *b) _pure_;
145 static inline bool _pure_ in_charset(const char *s, const char* charset) {
148 return s[strspn(s, charset)] == '\0';
151 bool string_has_cc(const char *p, const char *ok) _pure_;
153 char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
154 char *ellipsize(const char *s, size_t length, unsigned percent);
156 bool nulstr_contains(const char*nulstr, const char *needle);
158 char* strshorten(char *s, size_t l);
160 char *strreplace(const char *text, const char *old_string, const char *new_string);
162 char *strip_tab_ansi(char **p, size_t *l);
164 char *strextend(char **x, ...) _sentinel_;
166 char *strrep(const char *s, unsigned n);
168 int split_pair(const char *s, const char *sep, char **l, char **r);
170 int free_and_strdup(char **p, const char *s);
172 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
173 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
176 return (void*) haystack;
178 if (haystacklen < needlelen)
184 return memmem(haystack, haystacklen, needle, needlelen);
187 void* memory_erase(void *p, size_t l);
188 char *string_erase(char *x);
190 char *string_free_erase(char *s);
191 DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
192 #define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)
194 bool string_is_safe(const char *p) _pure_;