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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0fd16012ad
There's a common pattern of dynamically allocating an array of char pointers and then also dynamically allocating each string in this array. Provide a helper for freeing such a string array with one call. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/* 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/ctype.h>
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#include <linux/types.h>
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struct file;
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struct task_struct;
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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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#define UNESCAPE_SPACE 0x01
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#define UNESCAPE_OCTAL 0x02
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#define UNESCAPE_HEX 0x04
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#define UNESCAPE_SPECIAL 0x08
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#define UNESCAPE_ANY \
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(UNESCAPE_SPACE | UNESCAPE_OCTAL | UNESCAPE_HEX | UNESCAPE_SPECIAL)
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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 0x01
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#define ESCAPE_SPECIAL 0x02
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#define ESCAPE_NULL 0x04
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#define ESCAPE_OCTAL 0x08
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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 0x10
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#define ESCAPE_ANY_NP (ESCAPE_ANY | ESCAPE_NP)
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#define ESCAPE_HEX 0x20
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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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int string_escape_mem_ascii(const char *src, size_t isz, char *dst,
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size_t osz);
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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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void kfree_strarray(char **array, size_t n);
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#endif
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