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basic: add new ascii_strcasecmp_n() call

This commit is contained in:
Lennart Poettering 2016-01-13 02:21:16 +01:00
parent 4b2e9cfcf0
commit 522d85ae0a
3 changed files with 45 additions and 0 deletions
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15
src/basic/string-util.c
View File

@ -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;

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

@ -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) {

28
src/test/test-string-util.c
View File

@ -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;
}