1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 Copyright 2010 Lennart Poettering
15 /* What is interpreted as whitespace? */
16 #define WHITESPACE " \t\n\r"
17 #define NEWLINE "\n\r"
20 #define GLOB_CHARS "*?["
21 #define DIGITS "0123456789"
22 #define LOWERCASE_LETTERS "abcdefghijklmnopqrstuvwxyz"
23 #define UPPERCASE_LETTERS "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
24 #define LETTERS LOWERCASE_LETTERS UPPERCASE_LETTERS
25 #define ALPHANUMERICAL LETTERS DIGITS
26 #define HEXDIGITS DIGITS "abcdefABCDEF"
28 #define streq(a,b) (strcmp((a),(b)) == 0)
29 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
30 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
31 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
33 int strcmp_ptr(const char *a, const char *b) _pure_;
35 static inline bool streq_ptr(const char *a, const char *b) {
36 return strcmp_ptr(a, b) == 0;
39 static inline const char* strempty(const char *s) {
43 static inline const char* strnull(const char *s) {
47 static inline const char *strna(const char *s) {
51 static inline bool isempty(const char *p) {
55 static inline const char *empty_to_null(const char *p) {
56 return isempty(p) ? NULL : p;
59 #if 0 /// UNNEEDED by elogind
60 static inline const char *empty_to_dash(const char *str) {
61 return isempty(str) ? "-" : str;
65 static inline char *startswith(const char *s, const char *prefix) {
69 if (strncmp(s, prefix, l) == 0)
75 #if 0 /// UNNEEDED by elogind
76 static inline char *startswith_no_case(const char *s, const char *prefix) {
80 if (strncasecmp(s, prefix, l) == 0)
87 char *endswith(const char *s, const char *postfix) _pure_;
88 char *endswith_no_case(const char *s, const char *postfix) _pure_;
90 char *first_word(const char *s, const char *word) _pure_;
92 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
94 #define FOREACH_WORD(word, length, s, state) \
95 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
97 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
98 _FOREACH_WORD(word, length, s, separator, false, state)
100 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
101 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
103 char *strappend(const char *s, const char *suffix);
104 char *strnappend(const char *s, const char *suffix, size_t length);
106 char *strjoin_real(const char *x, ...) _sentinel_;
107 #define strjoin(a, ...) strjoin_real((a), __VA_ARGS__, NULL)
109 #define strjoina(a, ...) \
111 const char *_appendees_[] = { a, __VA_ARGS__ }; \
115 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
116 _len_ += strlen(_appendees_[_i_]); \
117 _p_ = _d_ = alloca(_len_ + 1); \
118 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
119 _p_ = stpcpy(_p_, _appendees_[_i_]); \
124 char *strstrip(char *s);
125 #if 0 /// UNNEEDED by elogind
126 char *delete_chars(char *s, const char *bad);
128 char *delete_trailing_chars(char *s, const char *bad);
129 char *truncate_nl(char *s);
131 #if 0 /// UNNEEDED by elogind
132 static inline char *skip_leading_chars(const char *s, const char *bad) {
140 return (char*) s + strspn(s, bad);
143 char ascii_tolower(char x);
144 char *ascii_strlower(char *s);
145 char *ascii_strlower_n(char *s, size_t n);
147 char ascii_toupper(char x);
148 char *ascii_strupper(char *s);
150 int ascii_strcasecmp_n(const char *a, const char *b, size_t n);
151 int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m);
153 bool chars_intersect(const char *a, const char *b) _pure_;
156 static inline bool _pure_ in_charset(const char *s, const char* charset) {
159 return s[strspn(s, charset)] == '\0';
162 bool string_has_cc(const char *p, const char *ok) _pure_;
164 char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
165 static inline char *ellipsize(const char *s, size_t length, unsigned percent) {
166 return ellipsize_mem(s, strlen(s), length, percent);
169 char *cellescape(char *buf, size_t len, const char *s);
171 /* This limit is arbitrary, enough to give some idea what the string contains */
172 #define CELLESCAPE_DEFAULT_LENGTH 64
174 bool nulstr_contains(const char *nulstr, const char *needle);
176 char* strshorten(char *s, size_t l);
178 char *strreplace(const char *text, const char *old_string, const char *new_string);
180 char *strip_tab_ansi(char **ibuf, size_t *_isz, size_t highlight[2]);
182 char *strextend_with_separator(char **x, const char *separator, ...) _sentinel_;
184 #define strextend(x, ...) strextend_with_separator(x, NULL, __VA_ARGS__)
186 char *strrep(const char *s, unsigned n);
188 int split_pair(const char *s, const char *sep, char **l, char **r);
190 int free_and_strdup(char **p, const char *s);
192 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
193 static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
196 return (void*) haystack;
198 if (haystacklen < needlelen)
204 return memmem(haystack, haystacklen, needle, needlelen);
207 #if !HAVE_EXPLICIT_BZERO
208 void explicit_bzero(void *p, size_t l);
211 char *string_erase(char *x);
213 char *string_free_erase(char *s);
214 DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
215 #define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)
217 bool string_is_safe(const char *p) _pure_;
219 static inline size_t strlen_ptr(const char *s) {
226 /* Like startswith(), but operates on arbitrary memory blocks */
227 static inline void *memory_startswith(const void *p, size_t sz, const char *token) {
238 if (memcmp(p, token, n) != 0)
241 return (uint8_t*) p + n;