include/linux/string.h

1 /* SPDX-License-Identifier: GPL-2.0 */
23  * memdup_array_user - duplicate array from user space
37 		return ERR_PTR(-EOVERFLOW);  in memdup_array_user()
43  * vmemdup_array_user - duplicate array from user space
57 		return ERR_PTR(-EOVERFLOW);  in vmemdup_array_user()
92  * strscpy - Copy a C-string into a sized buffer
99  * buffers overlap. The destination @dst buffer is always NUL terminated,
100  * unless it's zero-sized.
110  * trailing %NUL) or -E2BIG if @size is 0 or the copy from @src was
124 		memset(__dst + __wrote + 1, 0, __count - __wrote - 1);	\
129  * strscpy_pad() - Copy a C-string into a sized buffer
135  * behavior is undefined if the string buffers overlap. The destination
136  * buffer is always %NUL terminated, unless it's zero-sized.
146  * * -E2BIG if count is 0 or @src was truncated.
288  * mem_is_zero - Check if an area of memory is all 0's.
330  * sysfs_match_string - matches given string in an array
349  * strstarts - does @str start with @prefix?
361  * memzero_explicit - Fill a region of memory (e.g. sensitive
371  * memzero_explicit() doesn't need an arch-specific version as
381  * kbasename - return the last part of a pathname.
392 #include <linux/fortify-string.h>
403  * strtomem_pad - Copy NUL-terminated string to non-NUL-terminated buffer
406  * @src: Pointer to NUL-terminated string
410  * a NUL-terminated string, but with bounds checking on the source size, and
424 		     _dest_len == (size_t)-1);				\
430  * strtomem - Copy NUL-terminated string to non-NUL-terminated buffer
433  * @src: Pointer to NUL-terminated string
436  * a NUL-terminated string, but with bounds checking on the source size, and
450 		     _dest_len == (size_t)-1);				\
455  * memtostr - Copy a possibly non-NUL-term string to a NUL-term string
456  * @dest: Pointer to destination NUL-terminates string
460  * a NUL-terminated string.
462  * Note that sizes of @dest and @src must be known at compile-time.
471 	const size_t _copy_len = min(_dest_len - 1, _src_chars);	\
475 		     _dest_len == 0 || _dest_len == (size_t)-1 ||	\
476 		     _src_len == 0 || _src_len == (size_t)-1);		\
482  * memtostr_pad - Copy a possibly non-NUL-term string to a NUL-term string
484  * @dest: Pointer to destination NUL-terminates string
488  * a NUL-terminated string.
490  * Note that sizes of @dest and @src must be known at compile-time.
499 	const size_t _copy_len = min(_dest_len - 1, _src_chars);	\
503 		     _dest_len == 0 || _dest_len == (size_t)-1 ||	\
504 		     _src_len == 0 || _src_len == (size_t)-1);		\
506 	memset(&dest[_copy_len], 0, _dest_len - _copy_len);		\
510  * memset_after - Set a value after a struct member to the end of a struct
523 	       sizeof(*(obj)) - offsetofend(typeof(*(obj)), member));	\
527  * memset_startat - Set a value starting at a member to the end of a struct
541 	       sizeof(*(obj)) - offsetof(typeof(*(obj)), member));	\
545  * str_has_prefix - Test if a string has a given prefix
550  *  strncmp(str, prefix, sizeof(prefix) - 1)