1 // SPDX-License-Identifier: GPL-2.0
24  * memdup - duplicate region of memory
40  * strtobool - convert common user inputs into boolean values
45  * [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL.  Value
51 		return -EINVAL;  in strtobool()
82 	return -EINVAL;  in strtobool()
86  * strlcpy - Copy a C-string into a sized buffer
92  * NUL-terminated string that fits in the buffer (unless,
101 #pragma clang diagnostic ignored "-Wignored-attributes"
108 		size_t len = (ret >= size) ? size - 1 : ret;  in strlcpy()
119  * skip_spaces - Removes leading whitespace from @str.
122  * Returns a pointer to the first non-whitespace character in @str.
132  * strim - Removes leading and trailing whitespace from @s.
135  * Note that the first trailing whitespace is replaced with a %NUL-terminator
136  * in the given string @s. Returns a pointer to the first non-whitespace
148 	end = s + size - 1;  in strim()
150 		end--;  in strim()
157  * strreplace - Replace all occurrences of character in string.
172 static void *check_bytes8(const u8 *start, u8 value, unsigned int bytes)  in check_bytes8()  argument
175 		if (*start != value)  in check_bytes8()
176 			return (void *)start;  in check_bytes8()
177 		start++;  in check_bytes8()
178 		bytes--;  in check_bytes8()
184  * memchr_inv - Find an unmatching character in an area of memory.
185  * @start: The memory area
192 void *memchr_inv(const void *start, int c, size_t bytes)  in memchr_inv()  argument
194 	u8 value = c;  in memchr_inv()  local
199 		return check_bytes8(start, value, bytes);  in memchr_inv()
201 	value64 = value;  in memchr_inv()
206 	prefix = (unsigned long)start % 8;  in memchr_inv()
210 		prefix = 8 - prefix;  in memchr_inv()
211 		r = check_bytes8(start, value, prefix);  in memchr_inv()
214 		start += prefix;  in memchr_inv()
215 		bytes -= prefix;  in memchr_inv()
221 		if (*(u64 *)start != value64)  in memchr_inv()
222 			return check_bytes8(start, value, 8);  in memchr_inv()
223 		start += 8;  in memchr_inv()
224 		words--;  in memchr_inv()
227 	return check_bytes8(start, value, bytes % 8);  in memchr_inv()