/* * * Embedded Linux library * * Copyright (C) 2011-2014 Intel Corporation. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #ifndef __ELL_UTIL_H #define __ELL_UTIL_H #include #include #include #include #include #include #include #ifdef __cplusplus extern "C" { #endif #define l_container_of(ptr, type, member) ({ \ const __typeof__(((type *) 0)->member) *__mptr = (ptr); \ (type *)((char *) __mptr - offsetof(type, member)); \ }) #define likely(x) __builtin_expect(!!(x), 1) #define unlikely(x) __builtin_expect(!!(x), 0) #define L_STRINGIFY(val) L_STRINGIFY_ARG(val) #define L_STRINGIFY_ARG(contents) #contents #define L_WARN_ON(condition) __extension__ ({ \ bool r = !!(condition); \ if (unlikely(r)) \ l_warn("WARNING: %s:%s() condition %s failed", \ __FILE__, __func__, \ #condition); \ unlikely(r); \ }) #define L_PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) #define L_UINT_TO_PTR(u) ((void *) ((uintptr_t) (u))) #define L_PTR_TO_INT(p) ((int) ((intptr_t) (p))) #define L_INT_TO_PTR(u) ((void *) ((intptr_t) (u))) #define L_GET_UNALIGNED(ptr) __extension__ \ ({ \ struct __attribute__((packed)) { \ __typeof__(*(ptr)) __v; \ } *__p = (__typeof__(__p)) (ptr); \ __p->__v; \ }) #define L_PUT_UNALIGNED(val, ptr) \ do { \ struct __attribute__((packed)) { \ __typeof__(*(ptr)) __v; \ } *__p = (__typeof__(__p)) (ptr); \ __p->__v = (val); \ } while(0) #if __BYTE_ORDER == __LITTLE_ENDIAN #define L_LE16_TO_CPU(val) (val) #define L_LE32_TO_CPU(val) (val) #define L_LE64_TO_CPU(val) (val) #define L_CPU_TO_LE16(val) (val) #define L_CPU_TO_LE32(val) (val) #define L_CPU_TO_LE64(val) (val) #define L_BE16_TO_CPU(val) bswap_16(val) #define L_BE32_TO_CPU(val) bswap_32(val) #define L_BE64_TO_CPU(val) bswap_64(val) #define L_CPU_TO_BE16(val) bswap_16(val) #define L_CPU_TO_BE32(val) bswap_32(val) #define L_CPU_TO_BE64(val) bswap_64(val) #elif __BYTE_ORDER == __BIG_ENDIAN #define L_LE16_TO_CPU(val) bswap_16(val) #define L_LE32_TO_CPU(val) bswap_32(val) #define L_LE64_TO_CPU(val) bswap_64(val) #define L_CPU_TO_LE16(val) bswap_16(val) #define L_CPU_TO_LE32(val) bswap_32(val) #define L_CPU_TO_LE64(val) bswap_64(val) #define L_BE16_TO_CPU(val) (val) #define L_BE32_TO_CPU(val) (val) #define L_BE64_TO_CPU(val) (val) #define L_CPU_TO_BE16(val) (val) #define L_CPU_TO_BE32(val) (val) #define L_CPU_TO_BE64(val) (val) #else #error "Unknown byte order" #endif #if __STDC_VERSION__ <= 199409L #define inline __inline__ #endif static inline uint8_t l_get_u8(const void *ptr) { return *((const uint8_t *) ptr); } static inline void l_put_u8(uint8_t val, void *ptr) { *((uint8_t *) ptr) = val; } static inline uint16_t l_get_u16(const void *ptr) { return L_GET_UNALIGNED((const uint16_t *) ptr); } static inline void l_put_u16(uint16_t val, void *ptr) { L_PUT_UNALIGNED(val, (uint16_t *) ptr); } static inline uint32_t l_get_u32(const void *ptr) { return L_GET_UNALIGNED((const uint32_t *) ptr); } static inline void l_put_u32(uint32_t val, void *ptr) { L_PUT_UNALIGNED(val, (uint32_t *) ptr); } static inline uint64_t l_get_u64(const void *ptr) { return L_GET_UNALIGNED((const uint64_t *) ptr); } static inline void l_put_u64(uint64_t val, void *ptr) { L_PUT_UNALIGNED(val, (uint64_t *) ptr); } static inline int16_t l_get_s16(const void *ptr) { return L_GET_UNALIGNED((const int16_t *) ptr); } static inline int32_t l_get_s32(const void *ptr) { return L_GET_UNALIGNED((const int32_t *) ptr); } static inline int64_t l_get_s64(const void *ptr) { return L_GET_UNALIGNED((const int64_t *) ptr); } static inline uint16_t l_get_le16(const void *ptr) { return L_LE16_TO_CPU(L_GET_UNALIGNED((const uint16_t *) ptr)); } static inline uint16_t l_get_be16(const void *ptr) { return L_BE16_TO_CPU(L_GET_UNALIGNED((const uint16_t *) ptr)); } static inline uint32_t l_get_le32(const void *ptr) { return L_LE32_TO_CPU(L_GET_UNALIGNED((const uint32_t *) ptr)); } static inline uint32_t l_get_be32(const void *ptr) { return L_BE32_TO_CPU(L_GET_UNALIGNED((const uint32_t *) ptr)); } static inline uint64_t l_get_le64(const void *ptr) { return L_LE64_TO_CPU(L_GET_UNALIGNED((const uint64_t *) ptr)); } static inline uint64_t l_get_be64(const void *ptr) { return L_BE64_TO_CPU(L_GET_UNALIGNED((const uint64_t *) ptr)); } static inline void l_put_le16(uint16_t val, void *ptr) { L_PUT_UNALIGNED(L_CPU_TO_LE16(val), (uint16_t *) ptr); } static inline void l_put_be16(uint16_t val, const void *ptr) { L_PUT_UNALIGNED(L_CPU_TO_BE16(val), (uint16_t *) ptr); } static inline void l_put_le32(uint32_t val, void *ptr) { L_PUT_UNALIGNED(L_CPU_TO_LE32(val), (uint32_t *) ptr); } static inline void l_put_be32(uint32_t val, void *ptr) { L_PUT_UNALIGNED(L_CPU_TO_BE32(val), (uint32_t *) ptr); } static inline void l_put_le64(uint64_t val, void *ptr) { L_PUT_UNALIGNED(L_CPU_TO_LE64(val), (uint64_t *) ptr); } static inline void l_put_be64(uint64_t val, void *ptr) { L_PUT_UNALIGNED(L_CPU_TO_BE64(val), (uint64_t *) ptr); } #define L_AUTO_CLEANUP_VAR(vartype,varname,destroy) \ vartype varname __attribute__((cleanup(destroy))) #define L_AUTO_FREE_VAR(vartype,varname) \ vartype varname __attribute__((cleanup(auto_free))) #define L_ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) void *l_malloc(size_t size) __attribute__ ((warn_unused_result, malloc)); void *l_memdup(const void *mem, size_t size) __attribute__ ((warn_unused_result, malloc)); void l_free(void *ptr); void *l_realloc(void *mem, size_t size) __attribute__ ((warn_unused_result, malloc)); static inline void auto_free(void *a) { void **p = (void **)a; l_free(*p); } static inline size_t minsize(size_t a, size_t b) { if (a <= b) return a; return b; } /** * l_new: * @type: type of structure * @count: amount of structures * * Returns: pointer to allocated memory **/ #define l_new(type, count) \ (type *) (__extension__ ({ \ size_t __n = (size_t) (count); \ size_t __s = sizeof(type); \ void *__p; \ __p = l_malloc(__n * __s); \ memset(__p, 0, __n * __s); \ __p; \ })) char *l_strdup(const char *str); char *l_strndup(const char *str, size_t max); char *l_strdup_printf(const char *format, ...) __attribute__((format(printf, 1, 2))); char *l_strdup_vprintf(const char *format, va_list args); size_t l_strlcpy(char* dst, const char *src, size_t len); bool l_str_has_prefix(const char *str, const char *prefix); bool l_str_has_suffix(const char *str, const char *suffix); char *l_util_hexstring(const unsigned char *buf, size_t len); char *l_util_hexstring_upper(const unsigned char *buf, size_t len); unsigned char *l_util_from_hexstring(const char *str, size_t *out_len); typedef void (*l_util_hexdump_func_t) (const char *str, void *user_data); void l_util_hexdump(bool in, const void *buf, size_t len, l_util_hexdump_func_t function, void *user_data); void l_util_hexdump_two(bool in, const void *buf1, size_t len1, const void *buf2, size_t len2, l_util_hexdump_func_t function, void *user_data); void l_util_hexdumpv(bool in, const struct iovec *iov, size_t n_iov, l_util_hexdump_func_t function, void *user_data); void l_util_debug(l_util_hexdump_func_t function, void *user_data, const char *format, ...) __attribute__((format(printf, 3, 4))); const char *l_util_get_debugfs_path(void); #define L_TFR(expression) \ (__extension__ \ ({ long int __result; \ do __result = (long int) (expression); \ while (__result == -1L && errno == EINTR); \ __result; })) #ifdef __cplusplus } #endif #endif /* __ELL_UTIL_H */