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  1. #ifndef _LINUX_STRING_H_
  2. #define _LINUX_STRING_H_
  3.  
  4. /* We don't want strings.h stuff being used by user stuff by accident */
  5.  
  6. #ifndef __KERNEL__
  7. #include <string.h>
  8. #else
  9.  
  10. #include <linux/compiler.h>     /* for inline */
  11. #include <linux/types.h>        /* for size_t */
  12. #include <linux/stddef.h>       /* for NULL */
  13. #include <stdarg.h>
  14.  
  15. extern char *strndup_user(const char __user *, long);
  16. extern void *memdup_user(const void __user *, size_t);
  17.  
  18. /*
  19.  * Include machine specific inline routines
  20.  */
  21. #include <asm/string.h>
  22.  
  23. #ifndef __HAVE_ARCH_STRCPY
  24. extern char * strcpy(char *,const char *);
  25. #endif
  26. #ifndef __HAVE_ARCH_STRNCPY
  27. extern char * strncpy(char *,const char *, __kernel_size_t);
  28. #endif
  29. #ifndef __HAVE_ARCH_STRLCPY
  30. size_t strlcpy(char *, const char *, size_t);
  31. #endif
  32. #ifndef __HAVE_ARCH_STRCAT
  33. extern char * strcat(char *, const char *);
  34. #endif
  35. #ifndef __HAVE_ARCH_STRNCAT
  36. extern char * strncat(char *, const char *, __kernel_size_t);
  37. #endif
  38. #ifndef __HAVE_ARCH_STRLCAT
  39. extern size_t strlcat(char *, const char *, __kernel_size_t);
  40. #endif
  41. #ifndef __HAVE_ARCH_STRCMP
  42. extern int strcmp(const char *,const char *);
  43. #endif
  44. #ifndef __HAVE_ARCH_STRNCMP
  45. extern int strncmp(const char *,const char *,__kernel_size_t);
  46. #endif
  47. #ifndef __HAVE_ARCH_STRNICMP
  48. extern int strnicmp(const char *, const char *, __kernel_size_t);
  49. #endif
  50. #ifndef __HAVE_ARCH_STRCASECMP
  51. extern int strcasecmp(const char *s1, const char *s2);
  52. #endif
  53. #ifndef __HAVE_ARCH_STRNCASECMP
  54. extern int strncasecmp(const char *s1, const char *s2, size_t n);
  55. #endif
  56. #ifndef __HAVE_ARCH_STRCHR
  57. extern char * strchr(const char *,int);
  58. #endif
  59. #ifndef __HAVE_ARCH_STRNCHR
  60. extern char * strnchr(const char *, size_t, int);
  61. #endif
  62. #ifndef __HAVE_ARCH_STRRCHR
  63. extern char * strrchr(const char *,int);
  64. #endif
  65. extern char * __must_check skip_spaces(const char *);
  66.  
  67. extern char *strim(char *);
  68.  
  69. static inline __must_check char *strstrip(char *str)
  70. {
  71.         return strim(str);
  72. }
  73.  
  74. #ifndef __HAVE_ARCH_STRSTR
  75. extern char * strstr(const char *, const char *);
  76. #endif
  77. #ifndef __HAVE_ARCH_STRNSTR
  78. extern char * strnstr(const char *, const char *, size_t);
  79. #endif
  80. #ifndef __HAVE_ARCH_STRLEN
  81. extern __kernel_size_t strlen(const char *);
  82. #endif
  83. #ifndef __HAVE_ARCH_STRNLEN
  84. extern __kernel_size_t strnlen(const char *,__kernel_size_t);
  85. #endif
  86. #ifndef __HAVE_ARCH_STRPBRK
  87. extern char * strpbrk(const char *,const char *);
  88. #endif
  89. #ifndef __HAVE_ARCH_STRSEP
  90. extern char * strsep(char **,const char *);
  91. #endif
  92. #ifndef __HAVE_ARCH_STRSPN
  93. extern __kernel_size_t strspn(const char *,const char *);
  94. #endif
  95. #ifndef __HAVE_ARCH_STRCSPN
  96. extern __kernel_size_t strcspn(const char *,const char *);
  97. #endif
  98.  
  99. #ifndef __HAVE_ARCH_MEMSET
  100. extern void * memset(void *,int,__kernel_size_t);
  101. #endif
  102. #ifndef __HAVE_ARCH_MEMCPY
  103. extern void * memcpy(void *,const void *,__kernel_size_t);
  104. #endif
  105. #ifndef __HAVE_ARCH_MEMMOVE
  106. extern void * memmove(void *,const void *,__kernel_size_t);
  107. #endif
  108. #ifndef __HAVE_ARCH_MEMSCAN
  109. extern void * memscan(void *,int,__kernel_size_t);
  110. #endif
  111. #ifndef __HAVE_ARCH_MEMCMP
  112. extern int memcmp(const void *,const void *,__kernel_size_t);
  113. #endif
  114. #ifndef __HAVE_ARCH_MEMCHR
  115. extern void * memchr(const void *,int,__kernel_size_t);
  116. #endif
  117.  
  118. extern char *kstrdup(const char *s, gfp_t gfp);
  119. extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
  120. extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
  121.  
  122. extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
  123. extern void argv_free(char **argv);
  124.  
  125. extern bool sysfs_streq(const char *s1, const char *s2);
  126. extern int strtobool(const char *s, bool *res);
  127.  
  128. #ifdef CONFIG_BINARY_PRINTF
  129. int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
  130. int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
  131. int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
  132. #endif
  133.  
  134. extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
  135.                         const void *from, size_t available);
  136.  
  137. /**
  138.  * strstarts - does @str start with @prefix?
  139.  * @str: string to examine
  140.  * @prefix: prefix to look for.
  141.  */
  142. static inline bool strstarts(const char *str, const char *prefix)
  143. {
  144.         return strncmp(str, prefix, strlen(prefix)) == 0;
  145. }
  146. #endif
  147. #endif /* _LINUX_STRING_H_ */
  148.