include/linux/string_helpers.h

   1 #ifndef _LINUX_STRING_HELPERS_H_
   2 #define _LINUX_STRING_HELPERS_H_
   3
   4 #include <linux/types.h>
   5
   6 struct file;
   7
   8 /* Descriptions of the types of units to
   9  * print in */
  10 enum string_size_units {
  11         STRING_UNITS_10,        /* use powers of 10^3 (standard SI) */
  12         STRING_UNITS_2,         /* use binary powers of 2^10 */
  13 };
  14
  15 void string_get_size(u64 size, u64 blk_size, enum string_size_units units,
  16                      char *buf, int len);
  17
  18 #define UNESCAPE_SPACE          0x01
  19 #define UNESCAPE_OCTAL          0x02
  20 #define UNESCAPE_HEX            0x04
  21 #define UNESCAPE_SPECIAL        0x08
  22 #define UNESCAPE_ANY            \
  23         (UNESCAPE_SPACE | UNESCAPE_OCTAL | UNESCAPE_HEX | UNESCAPE_SPECIAL)
  24
  25 int string_unescape(char *src, char *dst, size_t size, unsigned int flags);
  26
  27 static inline int string_unescape_inplace(char *buf, unsigned int flags)
  28 {
  29         return string_unescape(buf, buf, 0, flags);
  30 }
  31
  32 static inline int string_unescape_any(char *src, char *dst, size_t size)
  33 {
  34         return string_unescape(src, dst, size, UNESCAPE_ANY);
  35 }
  36
  37 static inline int string_unescape_any_inplace(char *buf)
  38 {
  39         return string_unescape_any(buf, buf, 0);
  40 }
  41
  42 #define ESCAPE_SPACE            0x01
  43 #define ESCAPE_SPECIAL          0x02
  44 #define ESCAPE_NULL             0x04
  45 #define ESCAPE_OCTAL            0x08
  46 #define ESCAPE_ANY              \
  47         (ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_SPECIAL | ESCAPE_NULL)
  48 #define ESCAPE_NP               0x10
  49 #define ESCAPE_ANY_NP           (ESCAPE_ANY | ESCAPE_NP)
  50 #define ESCAPE_HEX              0x20
  51
  52 int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
  53                 unsigned int flags, const char *only);
  54
  55 static inline int string_escape_mem_any_np(const char *src, size_t isz,
  56                 char *dst, size_t osz, const char *only)
  57 {
  58         return string_escape_mem(src, isz, dst, osz, ESCAPE_ANY_NP, only);
  59 }
  60
  61 static inline int string_escape_str(const char *src, char *dst, size_t sz,
  62                 unsigned int flags, const char *only)
  63 {
  64         return string_escape_mem(src, strlen(src), dst, sz, flags, only);
  65 }
  66
  67 static inline int string_escape_str_any_np(const char *src, char *dst,
  68                 size_t sz, const char *only)
  69 {
  70         return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);
  71 }
  72
  73 char *kstrdup_quotable(const char *src, gfp_t gfp);
  74 char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
  75 char *kstrdup_quotable_file(struct file *file, gfp_t gfp);
  76
  77 #endif