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-rw-r--r--src/basic/string-util.h324
1 files changed, 324 insertions, 0 deletions
diff --git a/src/basic/string-util.h b/src/basic/string-util.h
new file mode 100644
index 0000000..b6d8be3
--- /dev/null
+++ b/src/basic/string-util.h
@@ -0,0 +1,324 @@
+/* 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"
+#define URI_RESERVED ":/?#[]@!$&'()*+;=" /* [RFC3986] */
+#define URI_UNRESERVED ALPHANUMERICAL "-._~" /* [RFC3986] */
+#define URI_VALID URI_RESERVED URI_UNRESERVED /* [RFC3986] */
+
+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* enabled_disabled(bool b) {
+ return b ? "enabled" : "disabled";
+}
+
+/* This macro's return pointer will have the "const" qualifier set or unset the same way as the input
+ * pointer. */
+#define empty_to_null(p) \
+ ({ \
+ const char *_p = (p); \
+ (typeof(p)) (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;
+}
+#define empty_or_dash_to_null(p) \
+ ({ \
+ const char *_p = (p); \
+ (typeof(p)) (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_full(char *s, size_t *ret_len);
+static inline char *truncate_nl(char *s) {
+ return truncate_nl_full(s, NULL);
+}
+
+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)
+
+char *strextendn(char **x, const char *s, size_t l);
+
+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);
+
+#define strrepa(s, n) \
+ ({ \
+ char *_d_, *_p_; \
+ size_t _len_ = strlen(s) * n; \
+ _p_ = _d_ = newa(char, _len_ + 1); \
+ for (unsigned _i_ = 0; _i_ < n; _i_++) \
+ _p_ = stpcpy(_p_, s); \
+ *_p_ = 0; \
+ _d_; \
+ })
+
+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);
+
+typedef enum MakeCStringMode {
+ MAKE_CSTRING_REFUSE_TRAILING_NUL,
+ MAKE_CSTRING_ALLOW_TRAILING_NUL,
+ MAKE_CSTRING_REQUIRE_TRAILING_NUL,
+ _MAKE_CSTRING_MODE_MAX,
+ _MAKE_CSTRING_MODE_INVALID = -1,
+} MakeCStringMode;
+
+int make_cstring(const char *s, size_t n, MakeCStringMode mode, char **ret);
+
+size_t strspn_from_end(const char *str, const char *accept);
+
+char *strdupspn(const char *a, const char *accept);
+char *strdupcspn(const char *a, const char *reject);
+
+char *find_line_startswith(const char *haystack, const char *needle);
+
+char *startswith_strv(const char *string, char **strv);
+
+#define STARTSWITH_SET(p, ...) \
+ startswith_strv(p, STRV_MAKE(__VA_ARGS__))
+
+bool version_is_valid(const char *s);
+
+bool version_is_valid_versionspec(const char *s);
+
+ssize_t strlevenshtein(const char *x, const char *y);
+
+static inline int strdup_or_null(const char *s, char **ret) {
+ char *c;
+
+ assert(ret);
+
+ /* This is a lot like strdup(), but is happy with NULL strings, and does not treat that as error, but
+ * copies the NULL value. */
+
+ if (!s) {
+ *ret = NULL;
+ return 0;
+ }
+
+ c = strdup(s);
+ if (!c)
+ return -ENOMEM;
+
+ *ret = c;
+ return 1;
+}