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 78