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string-util: introduce string_replace_char()

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This commit is contained in:
Yu Watanabe 2022-04-20 01:58:28 +09:00
parent e4e1353c25
commit 072f5f9b18
3 changed files with 22 additions and 0 deletions
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12
src/basic/string-util.c
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@ -1162,3 +1162,15 @@ bool streq_skip_trailing_chars(const char *s1, const char *s2, const char *ok) {
return in_charset(s1, ok) && in_charset(s2, ok);
}
char *string_replace_char(char *str, char old_char, char new_char) {
assert(str);
assert(old_char != '\0');
assert(new_char != '\0');
assert(old_char != new_char);
for (char *p = strchr(str, old_char); p; p = strchr(p + 1, old_char))
*p = new_char;
return str;
}

2
src/basic/string-util.h
View File

@ -233,3 +233,5 @@ static inline int string_contains_word(const char *string, const char *separator
}
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);

8
src/test/test-string-util.c
View File

@ -935,6 +935,14 @@ TEST(strextendf) {
assert_se(streq(p, "<77>,<99>,< 88>,<00001234>"));
}
TEST(string_replace_char) {
assert_se(streq(string_replace_char(strdupa(""), 'a', 'b'), ""));
assert_se(streq(string_replace_char(strdupa("abc"), 'a', 'b'), "bbc"));
assert_se(streq(string_replace_char(strdupa("hoge"), 'a', 'b'), "hoge"));
assert_se(streq(string_replace_char(strdupa("aaaa"), 'a', 'b'), "bbbb"));
assert_se(streq(string_replace_char(strdupa("aaaa"), 'a', '\t'), "\t\t\t\t"));
}
TEST(streq_skip_trailing_chars) {
/* NULL is WHITESPACE by default*/
assert_se(streq_skip_trailing_chars("foo bar", "foo bar", NULL));