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  1. #ifndef _LINUX_STRING_H_
  2. #define _LINUX_STRING_H_
  3.  
  4.  
  5. #include <linux/compiler.h>     /* for inline */
  6. #include <linux/types.h>        /* for size_t */
  7. #include <linux/stddef.h>       /* for NULL */
  8. #include <stdarg.h>
  9. #include <uapi/linux/string.h>
  10.  
  11. extern char *strndup_user(const char __user *, long);
  12. extern void *memdup_user(const void __user *, size_t);
  13.  
  14. /*
  15.  * Include machine specific inline routines
  16.  */
  17. #include <asm/string.h>
  18.  
  19. #ifndef __HAVE_ARCH_STRCPY
  20. extern char * strcpy(char *,const char *);
  21. #endif
  22. #ifndef __HAVE_ARCH_STRNCPY
  23. extern char * strncpy(char *,const char *, __kernel_size_t);
  24. #endif
  25. #ifndef __HAVE_ARCH_STRLCPY
  26. size_t strlcpy(char *, const char *, size_t);
  27. #endif
  28. #ifndef __HAVE_ARCH_STRSCPY
  29. ssize_t __must_check strscpy(char *, const char *, size_t);
  30. #endif
  31. #ifndef __HAVE_ARCH_STRCAT
  32. extern char * strcat(char *, const char *);
  33. #endif
  34. #ifndef __HAVE_ARCH_STRNCAT
  35. extern char * strncat(char *, const char *, __kernel_size_t);
  36. #endif
  37. #ifndef __HAVE_ARCH_STRLCAT
  38. extern size_t strlcat(char *, const char *, __kernel_size_t);
  39. #endif
  40. #ifndef __HAVE_ARCH_STRCMP
  41. extern int strcmp(const char *,const char *);
  42. #endif
  43. #ifndef __HAVE_ARCH_STRNCMP
  44. extern int strncmp(const char *,const char *,__kernel_size_t);
  45. #endif
  46. #ifndef __HAVE_ARCH_STRCASECMP
  47. extern int strcasecmp(const char *s1, const char *s2);
  48. #endif
  49. #ifndef __HAVE_ARCH_STRNCASECMP
  50. extern int strncasecmp(const char *s1, const char *s2, size_t n);
  51. #endif
  52. #ifndef __HAVE_ARCH_STRCHR
  53. extern char * strchr(const char *,int);
  54. #endif
  55. #ifndef __HAVE_ARCH_STRCHRNUL
  56. extern char * strchrnul(const char *,int);
  57. #endif
  58. #ifndef __HAVE_ARCH_STRNCHR
  59. extern char * strnchr(const char *, size_t, int);
  60. #endif
  61. #ifndef __HAVE_ARCH_STRRCHR
  62. extern char * strrchr(const char *,int);
  63. #endif
  64. extern char * __must_check skip_spaces(const char *);
  65.  
  66. extern char *strim(char *);
  67.  
  68. static inline __must_check char *strstrip(char *str)
  69. {
  70.         return strim(str);
  71. }
  72.  
  73. #ifndef __HAVE_ARCH_STRSTR
  74. extern char * strstr(const char *, const char *);
  75. #endif
  76. #ifndef __HAVE_ARCH_STRNSTR
  77. extern char * strnstr(const char *, const char *, size_t);
  78. #endif
  79. #ifndef __HAVE_ARCH_STRLEN
  80. extern __kernel_size_t strlen(const char *);
  81. #endif
  82. #ifndef __HAVE_ARCH_STRNLEN
  83. extern __kernel_size_t strnlen(const char *,__kernel_size_t);
  84. #endif
  85. #ifndef __HAVE_ARCH_STRPBRK
  86. extern char * strpbrk(const char *,const char *);
  87. #endif
  88. #ifndef __HAVE_ARCH_STRSEP
  89. extern char * strsep(char **,const char *);
  90. #endif
  91. #ifndef __HAVE_ARCH_STRSPN
  92. extern __kernel_size_t strspn(const char *,const char *);
  93. #endif
  94. #ifndef __HAVE_ARCH_STRCSPN
  95. extern __kernel_size_t strcspn(const char *,const char *);
  96. #endif
  97.  
  98. #ifndef __HAVE_ARCH_MEMSET
  99. extern void * memset(void *,int,__kernel_size_t);
  100. #endif
  101. #ifndef __HAVE_ARCH_MEMCPY
  102. extern void * memcpy(void *,const void *,__kernel_size_t);
  103. #endif
  104. #ifndef __HAVE_ARCH_MEMMOVE
  105. extern void * memmove(void *,const void *,__kernel_size_t);
  106. #endif
  107. #ifndef __HAVE_ARCH_MEMSCAN
  108. extern void * memscan(void *,int,__kernel_size_t);
  109. #endif
  110. #ifndef __HAVE_ARCH_MEMCMP
  111. extern int memcmp(const void *,const void *,__kernel_size_t);
  112. #endif
  113. #ifndef __HAVE_ARCH_MEMCHR
  114. extern void * memchr(const void *,int,__kernel_size_t);
  115. #endif
  116. void *memchr_inv(const void *s, int c, size_t n);
  117. char *strreplace(char *s, char old, char new);
  118.  
  119. extern void kfree_const(const void *x);
  120.  
  121. extern char *kstrdup(const char *s, gfp_t gfp);
  122. extern const char *kstrdup_const(const char *s, gfp_t gfp);
  123. extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
  124. extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
  125.  
  126. extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
  127. extern void argv_free(char **argv);
  128.  
  129. extern bool sysfs_streq(const char *s1, const char *s2);
  130. extern int strtobool(const char *s, bool *res);
  131.  
  132. #ifdef CONFIG_BINARY_PRINTF
  133. int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
  134. int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
  135. int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
  136. #endif
  137.  
  138. extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
  139.                                        const void *from, size_t available);
  140.  
  141. /**
  142.  * strstarts - does @str start with @prefix?
  143.  * @str: string to examine
  144.  * @prefix: prefix to look for.
  145.  */
  146. static inline bool strstarts(const char *str, const char *prefix)
  147. {
  148.         return strncmp(str, prefix, strlen(prefix)) == 0;
  149. }
  150.  
  151. size_t memweight(const void *ptr, size_t bytes);
  152. void memzero_explicit(void *s, size_t count);
  153.  
  154. /**
  155.  * kbasename - return the last part of a pathname.
  156.  *
  157.  * @path: path to extract the filename from.
  158.  */
  159. static inline const char *kbasename(const char *path)
  160. {
  161.         const char *tail = strrchr(path, '/');
  162.         return tail ? tail + 1 : path;
  163. }
  164.  
  165. #endif /* _LINUX_STRING_H_ */
  166.