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sys/fmt: add fmt_hex_bytes size probing

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This commit is contained in:
Juergen Fitschen 2020-05-12 17:39:25 +02:00
parent e272cc920b
commit aeb1230266
2 changed files with 8 additions and 0 deletions
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5
sys/fmt/fmt.c
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@ -160,6 +160,11 @@ size_t fmt_hex_bytes(uint8_t *out, const char *hex)
} }
size_t final_len = len >> 1; size_t final_len = len >> 1;
if (out == NULL) {
return final_len;
}
for (size_t i = 0, j = 0; j < final_len; i += 2, j++) { for (size_t i = 0, j = 0; j < final_len; i += 2, j++) {
out[j] = fmt_hex_byte(hex + i); out[j] = fmt_hex_byte(hex + i);
} }

3
tests/unittests/tests-fmt/tests-fmt.c
View File

@ -176,6 +176,9 @@ static void test_fmt_hex_bytes(void)
TEST_ASSERT_EQUAL_INT(0, val); TEST_ASSERT_EQUAL_INT(0, val);
TEST_ASSERT_EQUAL_INT(0, bytes); TEST_ASSERT_EQUAL_INT(0, bytes);
bytes = fmt_hex_bytes(NULL, "ABCDEF");
TEST_ASSERT_EQUAL_INT(3, bytes);
char hex2[3] = "00"; char hex2[3] = "00";
uint8_t val1[1] = { 0 }; uint8_t val1[1] = { 0 };
bytes = fmt_hex_bytes(val1, hex2); bytes = fmt_hex_bytes(val1, hex2);