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fmt: add fmt_char

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This commit is contained in:
Vincent Dupont 2018-09-20 19:12:17 +02:00
parent db4ce5eff2
commit 8c5ffa0a8d
3 changed files with 32 additions and 0 deletions
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8
sys/fmt/fmt.c
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@ -415,7 +415,15 @@ size_t fmt_lpad(char *out, size_t in_len, size_t pad_len, char pad_char)
return pad_len;
}
size_t fmt_char(char *out, char c)
{
if (out) {
*out = c;
}
return 1;
}
size_t fmt_to_lower(char *out, const char *str)
{
size_t len = 0;

13
sys/include/fmt.h
View File

@ -310,6 +310,19 @@ size_t fmt_s32_dfp(char *out, int32_t val, int fp_digits);
*/
size_t fmt_float(char *out, float f, unsigned precision);
/**
* @brief Copy @p in char to string (without terminating '\0')
*
* If @p out is NULL, will only return the number of bytes that would have
* been written.
*
* @param[out] out string to write to (or NULL)
* @param[in] c char value to append
*
* @return nr of bytes the function did or would write to out
*/
size_t fmt_char(char *out, char c);
/**
* @brief Count characters until '\0' (exclusive) in @p str
*

11
tests/unittests/tests-fmt/tests-fmt.c
View File

@ -749,6 +749,16 @@ static void test_fmt_str(void)
TEST_ASSERT_EQUAL_STRING(string1, &string2[0]);
}
static void test_fmt_char(void)
{
char string[] = "zzzzzzzzz";
TEST_ASSERT_EQUAL_INT(1, fmt_char(NULL, 'c'));
TEST_ASSERT_EQUAL_INT(1, fmt_char(string, 'c'));
string[1] = '\0';
TEST_ASSERT_EQUAL_STRING("c", &string[0]);
}
static void test_fmt_to_lower(void)
{
const char string_up[] = "AbCdeFGHijkLM";
@ -827,6 +837,7 @@ Test *tests_fmt_tests(void)
new_TestFixture(test_fmt_strlen),
new_TestFixture(test_fmt_strnlen),
new_TestFixture(test_fmt_str),
new_TestFixture(test_fmt_char),
new_TestFixture(test_fmt_to_lower),
new_TestFixture(test_scn_u32_dec),
new_TestFixture(test_fmt_lpad),