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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <stdbool.h>
#include <stddef.h>
#include <string.h>
#include "alloc-util.h"
#include "macro.h"
#include "string-util-fundamental.h"
/* What is interpreted as whitespace? */
#define WHITESPACE " \t\n\r"
#define NEWLINE "\n\r"
#define QUOTES "\"\'"
#define COMMENTS "#;"
#define GLOB_CHARS "*?["
#define DIGITS "0123456789"
#define LOWERCASE_LETTERS "abcdefghijklmnopqrstuvwxyz"
#define UPPERCASE_LETTERS "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define LETTERS LOWERCASE_LETTERS UPPERCASE_LETTERS
#define ALPHANUMERICAL LETTERS DIGITS
#define HEXDIGITS DIGITS "abcdefABCDEF"
#define LOWERCASE_HEXDIGITS DIGITS "abcdef"
static inline char* strstr_ptr(const char *haystack, const char *needle) {
if (!haystack || !needle)
return NULL;
return strstr(haystack, needle);
}
static inline char *strstrafter(const char *haystack, const char *needle) {
char *p;
/* Returns NULL if not found, or pointer to first character after needle if found */
p = strstr_ptr(haystack, needle);
if (!p)
return NULL;
return p + strlen(needle);
}
static inline const char* strnull(const char *s) {
return s ?: "(null)";
}
static inline const char *strna(const char *s) {
return s ?: "n/a";
}
static inline const char* true_false(bool b) {
return b ? "true" : "false";
}
static inline const char* plus_minus(bool b) {
return b ? "+" : "-";
}
static inline const char* one_zero(bool b) {
return b ? "1" : "0";
}
static inline const char* enable_disable(bool b) {
return b ? "enable" : "disable";
}
static inline const char *empty_to_null(const char *p) {
return isempty(p) ? NULL : p;
}
static inline const char *empty_to_na(const char *p) {
return isempty(p) ? "n/a" : p;
}
static inline const char *empty_to_dash(const char *str) {
return isempty(str) ? "-" : str;
}
static inline bool empty_or_dash(const char *str) {
return !str ||
str[0] == 0 ||
(str[0] == '-' && str[1] == 0);
}
static inline const char *empty_or_dash_to_null(const char *p) {
return empty_or_dash(p) ? NULL : p;
}
char *first_word(const char *s, const char *word) _pure_;
char *strnappend(const char *s, const char *suffix, size_t length);
char *strjoin_real(const char *x, ...) _sentinel_;
#define strjoin(a, ...) strjoin_real((a), __VA_ARGS__, NULL)
#define strjoina(a, ...) \
({ \
const char *_appendees_[] = { a, __VA_ARGS__ }; \
char *_d_, *_p_; \
size_t _len_ = 0; \
size_t _i_; \
for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
_len_ += strlen(_appendees_[_i_]); \
_p_ = _d_ = newa(char, _len_ + 1); \
for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
_p_ = stpcpy(_p_, _appendees_[_i_]); \
*_p_ = 0; \
_d_; \
})
char *strstrip(char *s);
char *delete_chars(char *s, const char *bad);
char *delete_trailing_chars(char *s, const char *bad);
char *truncate_nl(char *s);
static inline char *skip_leading_chars(const char *s, const char *bad) {
if (!s)
return NULL;
if (!bad)
bad = WHITESPACE;
return (char*) s + strspn(s, bad);
}
char ascii_tolower(char x);
char *ascii_strlower(char *s);
char *ascii_strlower_n(char *s, size_t n);
char ascii_toupper(char x);
char *ascii_strupper(char *s);
int ascii_strcasecmp_n(const char *a, const char *b, size_t n);
int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m);
bool chars_intersect(const char *a, const char *b) _pure_;
static inline bool _pure_ in_charset(const char *s, const char* charset) {
assert(s);
assert(charset);
return s[strspn(s, charset)] == '\0';
}
static inline bool char_is_cc(char p) {
/* char is unsigned on some architectures, e.g. aarch64. So, compiler may warn the condition
* p >= 0 is always true. See #19543. Hence, let's cast to unsigned before the comparison. Note
* that the cast in the right hand side is redundant, as according to the C standard, compilers
* automatically cast a signed value to unsigned when comparing with an unsigned variable. Just
* for safety and readability. */
return (uint8_t) p < (uint8_t) ' ' || p == 127;
}
bool string_has_cc(const char *p, const char *ok) _pure_;
char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
static inline char *ellipsize(const char *s, size_t length, unsigned percent) {
return ellipsize_mem(s, strlen(s), length, percent);
}
char *cellescape(char *buf, size_t len, const char *s);
/* This limit is arbitrary, enough to give some idea what the string contains */
#define CELLESCAPE_DEFAULT_LENGTH 64
char* strshorten(char *s, size_t l);
int strgrowpad0(char **s, size_t l);
char *strreplace(const char *text, const char *old_string, const char *new_string);
char *strip_tab_ansi(char **ibuf, size_t *_isz, size_t highlight[2]);
char *strextend_with_separator_internal(char **x, const char *separator, ...) _sentinel_;
#define strextend_with_separator(x, separator, ...) strextend_with_separator_internal(x, separator, __VA_ARGS__, NULL)
#define strextend(x, ...) strextend_with_separator_internal(x, NULL, __VA_ARGS__, NULL)
int strextendf_with_separator(char **x, const char *separator, const char *format, ...) _printf_(3,4);
#define strextendf(x, ...) strextendf_with_separator(x, NULL, __VA_ARGS__)
char *strrep(const char *s, unsigned n);
int split_pair(const char *s, const char *sep, char **l, char **r);
int free_and_strdup(char **p, const char *s);
static inline int free_and_strdup_warn(char **p, const char *s) {
int r;
r = free_and_strdup(p, s);
if (r < 0)
return log_oom();
return r;
}
int free_and_strndup(char **p, const char *s, size_t l);
bool string_is_safe(const char *p) _pure_;
DISABLE_WARNING_STRINGOP_TRUNCATION;
static inline void strncpy_exact(char *buf, const char *src, size_t buf_len) {
strncpy(buf, src, buf_len);
}
REENABLE_WARNING;
/* Like startswith_no_case(), but operates on arbitrary memory blocks.
* It works only for ASCII strings.
*/
static inline void *memory_startswith_no_case(const void *p, size_t sz, const char *token) {
assert(token);
size_t n = strlen(token);
if (sz < n)
return NULL;
assert(p);
for (size_t i = 0; i < n; i++)
if (ascii_tolower(((char *)p)[i]) != ascii_tolower(token[i]))
return NULL;
return (uint8_t*) p + n;
}
static inline char* str_realloc(char *p) {
/* Reallocate *p to actual size. Ignore failure, and return the original string on error. */
if (!p)
return NULL;
return realloc(p, strlen(p) + 1) ?: p;
}
char* string_erase(char *x);
int string_truncate_lines(const char *s, size_t n_lines, char **ret);
int string_extract_line(const char *s, size_t i, char **ret);
int string_contains_word_strv(const char *string, const char *separators, char **words, const char **ret_word);
static inline int string_contains_word(const char *string, const char *separators, const char *word) {
return string_contains_word_strv(string, separators, STRV_MAKE(word), NULL);
}
bool streq_skip_trailing_chars(const char *s1, const char *s2, const char *ok);
char *string_replace_char(char *str, char old_char, char new_char);
size_t strspn_from_end(const char *str, const char *accept);
char *startswith_strv(const char *string, char **strv);
#define STARTSWITH_SET(p, ...) \
startswith_strv(p, STRV_MAKE(__VA_ARGS__))
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