/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_STRING_HELPERS_H_#define _LINUX_STRING_HELPERS_H_#include <linux/bits.h>#include <linux/ctype.h>#include <linux/string_choices.h>#include <linux/string.h>#include <linux/types.h>struct device;struct file;struct task_struct;static inline bool string_is_terminated(const char *s, int len)return memchr(s, '\0' , len) ? true : false ;/* Descriptions of the types of units to print in */ enum string_size_units {/* use powers of 10^3 (standard SI) */ /* use binary powers of 2^10 */ /* Modifiers */ int string_get_size(u64 size, u64 blk_size, const enum string_size_units units,char *buf, int len);int parse_int_array(const char *buf, size_t count, int **array);int parse_int_array_user(const char __user *from, size_t count, int **array);#define UNESCAPE_SPACE BIT(0)#define UNESCAPE_OCTAL BIT(1)#define UNESCAPE_HEX BIT(2)#define UNESCAPE_SPECIAL BIT(3)#define UNESCAPE_ANY \#define UNESCAPE_ALL_MASK GENMASK(3, 0)int string_unescape(char *src, char *dst, size_t size, unsigned int flags);static inline int string_unescape_inplace(char *buf, unsigned int flags)return string_unescape(buf, buf, 0, flags);static inline int string_unescape_any(char *src, char *dst, size_t size)return string_unescape(src, dst, size, UNESCAPE_ANY);static inline int string_unescape_any_inplace(char *buf)return string_unescape_any(buf, buf, 0);#define ESCAPE_SPACE BIT(0)#define ESCAPE_SPECIAL BIT(1)#define ESCAPE_NULL BIT(2)#define ESCAPE_OCTAL BIT(3)#define ESCAPE_ANY \#define ESCAPE_NP BIT(4)#define ESCAPE_ANY_NP (ESCAPE_ANY | ESCAPE_NP)#define ESCAPE_HEX BIT(5)#define ESCAPE_NA BIT(6)#define ESCAPE_NAP BIT(7)#define ESCAPE_APPEND BIT(8)#define ESCAPE_ALL_MASK GENMASK(8, 0)int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,unsigned int flags, const char *only);static inline int string_escape_mem_any_np(const char *src, size_t isz,char *dst, size_t osz, const char *only)return string_escape_mem(src, isz, dst, osz, ESCAPE_ANY_NP, only);static inline int string_escape_str(const char *src, char *dst, size_t sz,unsigned int flags, const char *only)return string_escape_mem(src, strlen(src), dst, sz, flags, only);static inline int string_escape_str_any_np(const char *src, char *dst,const char *only)return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);static inline void string_upper(char *dst, const char *src)do {while (*src++);static inline void string_lower(char *dst, const char *src)do {while (*src++);char *kstrdup_quotable(const char *src, gfp_t gfp);char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);char *kstrdup_quotable_file(struct file *file, gfp_t gfp);char *kstrdup_and_replace(const char *src, char old, char new , gfp_t gfp);char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n);void kfree_strarray(char **array, size_t n);char **devm_kasprintf_strarray(struct device *dev, const char *prefix, size_t n);#endif quality 94%
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