LCOV - code coverage report
Current view: top level - include/linux - string_helpers.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 2 0.0 %
Date: 2023-03-27 20:00:47 Functions: 0 0 -

          Line data    Source code
       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _LINUX_STRING_HELPERS_H_
       3             : #define _LINUX_STRING_HELPERS_H_
       4             : 
       5             : #include <linux/bits.h>
       6             : #include <linux/ctype.h>
       7             : #include <linux/string.h>
       8             : #include <linux/types.h>
       9             : 
      10             : struct device;
      11             : struct file;
      12             : struct task_struct;
      13             : 
      14             : static inline bool string_is_terminated(const char *s, int len)
      15             : {
      16             :         return memchr(s, '\0', len) ? true : false;
      17             : }
      18             : 
      19             : /* Descriptions of the types of units to
      20             :  * print in */
      21             : enum string_size_units {
      22             :         STRING_UNITS_10,        /* use powers of 10^3 (standard SI) */
      23             :         STRING_UNITS_2,         /* use binary powers of 2^10 */
      24             : };
      25             : 
      26             : void string_get_size(u64 size, u64 blk_size, enum string_size_units units,
      27             :                      char *buf, int len);
      28             : 
      29             : int parse_int_array_user(const char __user *from, size_t count, int **array);
      30             : 
      31             : #define UNESCAPE_SPACE          BIT(0)
      32             : #define UNESCAPE_OCTAL          BIT(1)
      33             : #define UNESCAPE_HEX            BIT(2)
      34             : #define UNESCAPE_SPECIAL        BIT(3)
      35             : #define UNESCAPE_ANY            \
      36             :         (UNESCAPE_SPACE | UNESCAPE_OCTAL | UNESCAPE_HEX | UNESCAPE_SPECIAL)
      37             : 
      38             : #define UNESCAPE_ALL_MASK       GENMASK(3, 0)
      39             : 
      40             : int string_unescape(char *src, char *dst, size_t size, unsigned int flags);
      41             : 
      42             : static inline int string_unescape_inplace(char *buf, unsigned int flags)
      43             : {
      44             :         return string_unescape(buf, buf, 0, flags);
      45             : }
      46             : 
      47             : static inline int string_unescape_any(char *src, char *dst, size_t size)
      48             : {
      49             :         return string_unescape(src, dst, size, UNESCAPE_ANY);
      50             : }
      51             : 
      52             : static inline int string_unescape_any_inplace(char *buf)
      53             : {
      54             :         return string_unescape_any(buf, buf, 0);
      55             : }
      56             : 
      57             : #define ESCAPE_SPACE            BIT(0)
      58             : #define ESCAPE_SPECIAL          BIT(1)
      59             : #define ESCAPE_NULL             BIT(2)
      60             : #define ESCAPE_OCTAL            BIT(3)
      61             : #define ESCAPE_ANY              \
      62             :         (ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_SPECIAL | ESCAPE_NULL)
      63             : #define ESCAPE_NP               BIT(4)
      64             : #define ESCAPE_ANY_NP           (ESCAPE_ANY | ESCAPE_NP)
      65             : #define ESCAPE_HEX              BIT(5)
      66             : #define ESCAPE_NA               BIT(6)
      67             : #define ESCAPE_NAP              BIT(7)
      68             : #define ESCAPE_APPEND           BIT(8)
      69             : 
      70             : #define ESCAPE_ALL_MASK         GENMASK(8, 0)
      71             : 
      72             : int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
      73             :                 unsigned int flags, const char *only);
      74             : 
      75             : static inline int string_escape_mem_any_np(const char *src, size_t isz,
      76             :                 char *dst, size_t osz, const char *only)
      77             : {
      78             :         return string_escape_mem(src, isz, dst, osz, ESCAPE_ANY_NP, only);
      79             : }
      80             : 
      81             : static inline int string_escape_str(const char *src, char *dst, size_t sz,
      82             :                 unsigned int flags, const char *only)
      83             : {
      84             :         return string_escape_mem(src, strlen(src), dst, sz, flags, only);
      85             : }
      86             : 
      87             : static inline int string_escape_str_any_np(const char *src, char *dst,
      88             :                 size_t sz, const char *only)
      89             : {
      90             :         return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);
      91             : }
      92             : 
      93             : static inline void string_upper(char *dst, const char *src)
      94             : {
      95             :         do {
      96             :                 *dst++ = toupper(*src);
      97             :         } while (*src++);
      98             : }
      99             : 
     100             : static inline void string_lower(char *dst, const char *src)
     101             : {
     102             :         do {
     103             :                 *dst++ = tolower(*src);
     104             :         } while (*src++);
     105             : }
     106             : 
     107             : char *kstrdup_quotable(const char *src, gfp_t gfp);
     108             : char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
     109             : char *kstrdup_quotable_file(struct file *file, gfp_t gfp);
     110             : 
     111             : char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n);
     112             : void kfree_strarray(char **array, size_t n);
     113             : 
     114             : char **devm_kasprintf_strarray(struct device *dev, const char *prefix, size_t n);
     115             : 
     116             : static inline const char *str_yes_no(bool v)
     117             : {
     118           0 :         return v ? "yes" : "no";
     119             : }
     120             : 
     121             : static inline const char *str_on_off(bool v)
     122             : {
     123             :         return v ? "on" : "off";
     124             : }
     125             : 
     126             : static inline const char *str_enable_disable(bool v)
     127             : {
     128             :         return v ? "enable" : "disable";
     129             : }
     130             : 
     131             : static inline const char *str_enabled_disabled(bool v)
     132             : {
     133           0 :         return v ? "enabled" : "disabled";
     134             : }
     135             : 
     136             : static inline const char *str_read_write(bool v)
     137             : {
     138             :         return v ? "read" : "write";
     139             : }
     140             : 
     141             : #endif

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