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_STRCAT 29 extern char * strcat(char *, const char *); 30 #endif 31 #ifndef __HAVE_ARCH_STRNCAT 32 extern char * strncat(char *, const char *, __kernel_size_t); 33 #endif 34 #ifndef __HAVE_ARCH_STRLCAT 35 extern size_t strlcat(char *, const char *, __kernel_size_t); 36 #endif 37 #ifndef __HAVE_ARCH_STRCMP 38 extern int strcmp(const char *,const char *); 39 #endif 40 #ifndef __HAVE_ARCH_STRNCMP 41 extern int strncmp(const char *,const char *,__kernel_size_t); 42 #endif 43 #ifndef __HAVE_ARCH_STRNICMP 44 extern int strnicmp(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_STRNCHR 56 extern char * strnchr(const char *, size_t, int); 57 #endif 58 #ifndef __HAVE_ARCH_STRRCHR 59 extern char * strrchr(const char *,int); 60 #endif 61 extern char * __must_check skip_spaces(const char *); 62 63 extern char *strim(char *); 64 65 static inline __must_check char *strstrip(char *str) 66 { 67 return strim(str); 68 } 69 70 #ifndef __HAVE_ARCH_STRSTR 71 extern char * strstr(const char *, const char *); 72 #endif 73 #ifndef __HAVE_ARCH_STRNSTR 74 extern char * strnstr(const char *, const char *, size_t); 75 #endif 76 #ifndef __HAVE_ARCH_STRLEN 77 extern __kernel_size_t strlen(const char *); 78 #endif 79 #ifndef __HAVE_ARCH_STRNLEN 80 extern __kernel_size_t strnlen(const char *,__kernel_size_t); 81 #endif 82 #ifndef __HAVE_ARCH_STRPBRK 83 extern char * strpbrk(const char *,const char *); 84 #endif 85 #ifndef __HAVE_ARCH_STRSEP 86 extern char * strsep(char **,const char *); 87 #endif 88 #ifndef __HAVE_ARCH_STRSPN 89 extern __kernel_size_t strspn(const char *,const char *); 90 #endif 91 #ifndef __HAVE_ARCH_STRCSPN 92 extern __kernel_size_t strcspn(const char *,const char *); 93 #endif 94 95 #ifndef __HAVE_ARCH_MEMSET 96 extern void * memset(void *,int,__kernel_size_t); 97 #endif 98 #ifndef __HAVE_ARCH_MEMCPY 99 extern void * memcpy(void *,const void *,__kernel_size_t); 100 #endif 101 #ifndef __HAVE_ARCH_MEMMOVE 102 extern void * memmove(void *,const void *,__kernel_size_t); 103 #endif 104 #ifndef __HAVE_ARCH_MEMSCAN 105 extern void * memscan(void *,int,__kernel_size_t); 106 #endif 107 #ifndef __HAVE_ARCH_MEMCMP 108 extern int memcmp(const void *,const void *,__kernel_size_t); 109 #endif 110 #ifndef __HAVE_ARCH_MEMCHR 111 extern void * memchr(const void *,int,__kernel_size_t); 112 #endif 113 void *memchr_inv(const void *s, int c, size_t n); 114 115 extern char *kstrdup(const char *s, gfp_t gfp); 116 extern char *kstrndup(const char *s, size_t len, gfp_t gfp); 117 extern void *kmemdup(const void *src, size_t len, gfp_t gfp); 118 119 extern char **argv_split(gfp_t gfp, const char *str, int *argcp); 120 extern void argv_free(char **argv); 121 122 extern bool sysfs_streq(const char *s1, const char *s2); 123 extern int strtobool(const char *s, bool *res); 124 125 #ifdef CONFIG_BINARY_PRINTF 126 int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args); 127 int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf); 128 int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4); 129 #endif 130 131 extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos, 132 const void *from, size_t available); 133 134 /** 135 * strstarts - does @str start with @prefix? 136 * @str: string to examine 137 * @prefix: prefix to look for. 138 */ 139 static inline bool strstarts(const char *str, const char *prefix) 140 { 141 return strncmp(str, prefix, strlen(prefix)) == 0; 142 } 143 144 extern size_t memweight(const void *ptr, size_t bytes); 145 146 /** 147 * kbasename - return the last part of a pathname. 148 * 149 * @path: path to extract the filename from. 150 */ 151 static inline const char *kbasename(const char *path) 152 { 153 const char *tail = strrchr(path, '/'); 154 return tail ? tail + 1 : path; 155 } 156 157 #endif /* _LINUX_STRING_H_ */ 158