142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_STRING_HELPERS_H_
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#define _LINUX_STRING_HELPERS_H_
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#include <linux/bits.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/types.h>
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struct device;
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struct file;
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struct task_struct;
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static inline bool string_is_terminated(const char *s, int len)
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{
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return memchr(s, '\0', len) ? true : false;
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}
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/* Descriptions of the types of units to
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* print in */
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enum string_size_units {
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STRING_UNITS_10, /* use powers of 10^3 (standard SI) */
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STRING_UNITS_2, /* use binary powers of 2^10 */
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};
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void string_get_size(u64 size, u64 blk_size, enum string_size_units units,
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char *buf, int len);
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int parse_int_array_user(const char __user *from, size_t count, int **array);
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#define UNESCAPE_SPACE BIT(0)
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#define UNESCAPE_OCTAL BIT(1)
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#define UNESCAPE_HEX BIT(2)
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#define UNESCAPE_SPECIAL BIT(3)
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#define UNESCAPE_ANY \
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(UNESCAPE_SPACE | UNESCAPE_OCTAL | UNESCAPE_HEX | UNESCAPE_SPECIAL)
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#define UNESCAPE_ALL_MASK GENMASK(3, 0)
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int string_unescape(char *src, char *dst, size_t size, unsigned int flags);
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static inline int string_unescape_inplace(char *buf, unsigned int flags)
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{
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return string_unescape(buf, buf, 0, flags);
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}
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static inline int string_unescape_any(char *src, char *dst, size_t size)
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{
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return string_unescape(src, dst, size, UNESCAPE_ANY);
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}
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static inline int string_unescape_any_inplace(char *buf)
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{
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return string_unescape_any(buf, buf, 0);
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}
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#define ESCAPE_SPACE BIT(0)
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#define ESCAPE_SPECIAL BIT(1)
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#define ESCAPE_NULL BIT(2)
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#define ESCAPE_OCTAL BIT(3)
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#define ESCAPE_ANY \
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(ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_SPECIAL | ESCAPE_NULL)
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#define ESCAPE_NP BIT(4)
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#define ESCAPE_ANY_NP (ESCAPE_ANY | ESCAPE_NP)
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#define ESCAPE_HEX BIT(5)
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#define ESCAPE_NA BIT(6)
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#define ESCAPE_NAP BIT(7)
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#define ESCAPE_APPEND BIT(8)
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#define ESCAPE_ALL_MASK GENMASK(8, 0)
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int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
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unsigned int flags, const char *only);
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static inline int string_escape_mem_any_np(const char *src, size_t isz,
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char *dst, size_t osz, const char *only)
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{
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return string_escape_mem(src, isz, dst, osz, ESCAPE_ANY_NP, only);
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}
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static inline int string_escape_str(const char *src, char *dst, size_t sz,
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unsigned int flags, const char *only)
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{
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return string_escape_mem(src, strlen(src), dst, sz, flags, only);
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}
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static inline int string_escape_str_any_np(const char *src, char *dst,
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size_t sz, const char *only)
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{
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return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);
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}
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static inline void string_upper(char *dst, const char *src)
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{
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do {
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*dst++ = toupper(*src);
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} while (*src++);
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}
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static inline void string_lower(char *dst, const char *src)
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{
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do {
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*dst++ = tolower(*src);
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} while (*src++);
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}
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char *kstrdup_quotable(const char *src, gfp_t gfp);
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char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
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char *kstrdup_quotable_file(struct file *file, gfp_t gfp);
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char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n);
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void kfree_strarray(char **array, size_t n);
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char **devm_kasprintf_strarray(struct device *dev, const char *prefix, size_t n);
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static inline const char *str_yes_no(bool v)
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{
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return v ? "yes" : "no";
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}
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static inline const char *str_on_off(bool v)
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{
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return v ? "on" : "off";
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}
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static inline const char *str_enable_disable(bool v)
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{
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return v ? "enable" : "disable";
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}
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static inline const char *str_enabled_disabled(bool v)
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{
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return v ? "enabled" : "disabled";
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}
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static inline const char *str_read_write(bool v)
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{
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return v ? "read" : "write";
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}
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#endif
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