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