diff options
| -rw-r--r-- | src/basic/string-util.c | 15 | ||||
| -rw-r--r-- | src/basic/string-util.h | 2 | ||||
| -rw-r--r-- | src/test/test-string-util.c | 28 |
3 files changed, 45 insertions, 0 deletions
diff --git a/src/basic/string-util.c b/src/basic/string-util.c index 849e457439..b7b8c97bc0 100644 --- a/src/basic/string-util.c +++ b/src/basic/string-util.c @@ -348,6 +348,21 @@ char *ascii_strlower_n(char *t, size_t n) { return t; } +int ascii_strcasecmp_n(const char *a, const char *b, size_t n) { + + for (; n > 0; a++, b++, n--) { + int x, y; + + x = (int) (uint8_t) ascii_tolower(*a); + y = (int) (uint8_t) ascii_tolower(*b); + + if (x != y) + return x - y; + } + + return 0; +} + bool chars_intersect(const char *a, const char *b) { const char *p; diff --git a/src/basic/string-util.h b/src/basic/string-util.h index 1ac6bcd6f8..6374e11119 100644 --- a/src/basic/string-util.h +++ b/src/basic/string-util.h @@ -134,6 +134,8 @@ char ascii_tolower(char x); char *ascii_strlower(char *s); char *ascii_strlower_n(char *s, size_t n); +int ascii_strcasecmp_n(const char *a, const char *b, size_t n); + bool chars_intersect(const char *a, const char *b) _pure_; static inline bool _pure_ in_charset(const char *s, const char* charset) { diff --git a/src/test/test-string-util.c b/src/test/test-string-util.c index 25444c794a..4758108706 100644 --- a/src/test/test-string-util.c +++ b/src/test/test-string-util.c @@ -55,7 +55,35 @@ static void test_string_erase(void) { assert_se(streq(string_erase(x), "xxxxxxxxx")); } +static void test_ascii_strcasecmp_n(void) { + + assert_se(ascii_strcasecmp_n("", "", 0) == 0); + assert_se(ascii_strcasecmp_n("", "", 1) == 0); + assert_se(ascii_strcasecmp_n("", "a", 1) < 0); + assert_se(ascii_strcasecmp_n("", "a", 2) < 0); + assert_se(ascii_strcasecmp_n("a", "", 1) > 0); + assert_se(ascii_strcasecmp_n("a", "", 2) > 0); + assert_se(ascii_strcasecmp_n("a", "a", 1) == 0); + assert_se(ascii_strcasecmp_n("a", "a", 2) == 0); + assert_se(ascii_strcasecmp_n("a", "b", 1) < 0); + assert_se(ascii_strcasecmp_n("a", "b", 2) < 0); + assert_se(ascii_strcasecmp_n("b", "a", 1) > 0); + assert_se(ascii_strcasecmp_n("b", "a", 2) > 0); + assert_se(ascii_strcasecmp_n("xxxxyxxxx", "xxxxYxxxx", 9) == 0); + assert_se(ascii_strcasecmp_n("xxxxxxxxx", "xxxxyxxxx", 9) < 0); + assert_se(ascii_strcasecmp_n("xxxxXxxxx", "xxxxyxxxx", 9) < 0); + assert_se(ascii_strcasecmp_n("xxxxxxxxx", "xxxxYxxxx", 9) < 0); + assert_se(ascii_strcasecmp_n("xxxxXxxxx", "xxxxYxxxx", 9) < 0); + + assert_se(ascii_strcasecmp_n("xxxxYxxxx", "xxxxYxxxx", 9) == 0); + assert_se(ascii_strcasecmp_n("xxxxyxxxx", "xxxxxxxxx", 9) > 0); + assert_se(ascii_strcasecmp_n("xxxxyxxxx", "xxxxXxxxx", 9) > 0); + assert_se(ascii_strcasecmp_n("xxxxYxxxx", "xxxxxxxxx", 9) > 0); + assert_se(ascii_strcasecmp_n("xxxxYxxxx", "xxxxXxxxx", 9) > 0); +} + int main(int argc, char *argv[]) { test_string_erase(); + test_ascii_strcasecmp_n(); return 0; } |