Commit 4cf00a61 authored Jun 25, 2024 by Emil Gydesen Committed by Anas Nashif Jun 27, 2024

zephyr: Add zero-len check for utf8_trunc



The function did not check if the provided string had a zero
length before starting to truncate, which meant that last_byte_p
could possible have pointed to the value before the string.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>

parent a895abab

lib/utils/utf8.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -16,7 +16,14 @@

		char utf8_trunc(char utf8_str)
		{
		char *last_byte_p = utf8_str + strlen(utf8_str) - 1;
		const size_t len = strlen(utf8_str);

		if (len == 0U) {
		/* no-op */
		return utf8_str;
		}

		char *last_byte_p = utf8_str + len - 1U;
		uint8_t bytes_truncated;
		char seq_start_byte;

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