include/linux/string.h

1 /* SPDX-License-Identifier: GPL-2.0 */
22  * memdup_array_user - duplicate array from user space
36 		return ERR_PTR(-EOVERFLOW);  in memdup_array_user()
42  * vmemdup_array_user - duplicate array from user space
56 		return ERR_PTR(-EOVERFLOW);  in vmemdup_array_user()
91  * strscpy - Copy a C-string into a sized buffer
98  * buffers overlap. The destination @dst buffer is always NUL terminated,
99  * unless it's zero-sized.
109  * trailing %NUL) or -E2BIG if @size is 0 or the copy from @src was
123 		memset(__dst + __wrote + 1, 0, __count - __wrote - 1);	\
128  * strscpy_pad() - Copy a C-string into a sized buffer
134  * behavior is undefined if the string buffers overlap. The destination
135  * buffer is always %NUL terminated, unless it's zero-sized.
145  * * -E2BIG if count is 0 or @src was truncated.
287  * mem_is_zero - Check if an area of memory is all 0's.
327  * sysfs_match_string - matches given string in an array
347  * strstarts - does @str start with @prefix?
359  * memzero_explicit - Fill a region of memory (e.g. sensitive
369  * memzero_explicit() doesn't need an arch-specific version as
379  * kbasename - return the last part of a pathname.
390 #include <linux/fortify-string.h>
401  * strtomem_pad - Copy NUL-terminated string to non-NUL-terminated buffer
404  * @src: Pointer to NUL-terminated string
408  * a NUL-terminated string, but with bounds checking on the source size, and
419 		     _dest_len == (size_t)-1);				\
425  * strtomem - Copy NUL-terminated string to non-NUL-terminated buffer
428  * @src: Pointer to NUL-terminated string
431  * a NUL-terminated string, but with bounds checking on the source size, and
442 		     _dest_len == (size_t)-1);				\
447  * memtostr - Copy a possibly non-NUL-term string to a NUL-term string
448  * @dest: Pointer to destination NUL-terminates string
452  * a NUL-terminated string.
454  * Note that sizes of @dest and @src must be known at compile-time.
460 	const size_t _copy_len = min(_dest_len - 1, _src_chars);	\
464 		     _dest_len == 0 || _dest_len == (size_t)-1 ||	\
465 		     _src_len == 0 || _src_len == (size_t)-1);		\
471  * memtostr_pad - Copy a possibly non-NUL-term string to a NUL-term string
473  * @dest: Pointer to destination NUL-terminates string
477  * a NUL-terminated string.
479  * Note that sizes of @dest and @src must be known at compile-time.
485 	const size_t _copy_len = min(_dest_len - 1, _src_chars);	\
489 		     _dest_len == 0 || _dest_len == (size_t)-1 ||	\
490 		     _src_len == 0 || _src_len == (size_t)-1);		\
492 	memset(&dest[_copy_len], 0, _dest_len - _copy_len);		\
496  * memset_after - Set a value after a struct member to the end of a struct
509 	       sizeof(*(obj)) - offsetofend(typeof(*(obj)), member));	\
513  * memset_startat - Set a value starting at a member to the end of a struct
527 	       sizeof(*(obj)) - offsetof(typeof(*(obj)), member));	\
531  * str_has_prefix - Test if a string has a given prefix
536  *  strncmp(str, prefix, sizeof(prefix) - 1)