/*- * Copyright (c) 2015-2016 Landon Fuller <landonf@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGES. * */ #ifndef _BHND_NVRAM_BHND_NVRAM_VALUE_H_ #define _BHND_NVRAM_BHND_NVRAM_VALUE_H_ #include <sys/refcount.h> #ifdef _KERNEL #include <sys/stdarg.h> #else /* !_KERNEL */ #include <stdarg.h> #endif /* _KERNEL */ #include "bhnd_nvram.h" typedef struct bhnd_nvram_val_fmt bhnd_nvram_val_fmt; typedef struct bhnd_nvram_val bhnd_nvram_val; const char *bhnd_nvram_val_fmt_name( const bhnd_nvram_val_fmt *fmt); const bhnd_nvram_val_fmt *bhnd_nvram_val_default_fmt( bhnd_nvram_type type); int bhnd_nvram_val_init(bhnd_nvram_val *value, const bhnd_nvram_val_fmt *fmt, const void *inp, size_t ilen, bhnd_nvram_type itype, uint32_t flags); int bhnd_nvram_val_convert_init( bhnd_nvram_val *value, const bhnd_nvram_val_fmt *fmt, bhnd_nvram_val *src, uint32_t flags); int bhnd_nvram_val_new(bhnd_nvram_val **value, const bhnd_nvram_val_fmt *fmt, const void *inp, size_t ilen, bhnd_nvram_type itype, uint32_t flags); int bhnd_nvram_val_convert_new( bhnd_nvram_val **value, const bhnd_nvram_val_fmt *fmt, bhnd_nvram_val *src, uint32_t flags); bhnd_nvram_val *bhnd_nvram_val_copy(bhnd_nvram_val *value); void bhnd_nvram_val_release( bhnd_nvram_val *value); int bhnd_nvram_val_encode(bhnd_nvram_val *value, void *outp, size_t *olen, bhnd_nvram_type otype); int bhnd_nvram_val_encode_elem( bhnd_nvram_val *value, const void *inp, size_t ilen, void *outp, size_t *olen, bhnd_nvram_type otype); int bhnd_nvram_val_printf(bhnd_nvram_val *value, const char *fmt, char *outp, size_t *olen, ...); int bhnd_nvram_val_vprintf(bhnd_nvram_val *value, const char *fmt, char *outp, size_t *olen, va_list ap); const void *bhnd_nvram_val_bytes(bhnd_nvram_val *value, size_t *olen, bhnd_nvram_type *otype); bhnd_nvram_type bhnd_nvram_val_type(bhnd_nvram_val *value); bhnd_nvram_type bhnd_nvram_val_elem_type( bhnd_nvram_val *value); const void *bhnd_nvram_val_next(bhnd_nvram_val *value, const void *prev, size_t *olen); size_t bhnd_nvram_val_nelem(bhnd_nvram_val *value); /** * NVRAM value flags */ enum { /** * Do not allocate additional space for value data; all data must be * represented inline within the value structure (default). */ BHND_NVRAM_VAL_FIXED = (0<<0), /** * Automatically allocate additional space for value data if it cannot * be represented within the value structure. */ BHND_NVRAM_VAL_DYNAMIC = (1<<0), /** * Copy the value data upon initialization. (default). */ BHND_NVRAM_VAL_COPY_DATA = (0<<1), /** * Do not perform an initial copy of the value data; the data must * remain valid for the lifetime of the NVRAM value. * * Value data will still be copied if the value itself is copied to the * heap. */ BHND_NVRAM_VAL_BORROW_DATA = (1<<1), /** * Do not copy the value data when copying the value to the heap; the * vlaue data is assumed to be statically allocated and must remain * valid for the lifetime of the process. * * Implies BHND_NVRAM_VAL_BORROW_DATA. */ BHND_NVRAM_VAL_STATIC_DATA = (1<<2), }; /** * @internal * * NVRAM value storage types. */ typedef enum { /** * The value structure has an automatic storage duration * (e.g. it is stack allocated, or is otherwise externally managed), * and no destructors will be run prior to deallocation of the value. * * When performing copy/retain, the existing structure must be copied * to a new heap allocation. */ BHND_NVRAM_VAL_STORAGE_AUTO = 0, /** * The value structure was heap allocated and is fully managed by the * the NVRAM value API. * * When performing copy/retain, the existing structure may be retained * as-is. */ BHND_NVRAM_VAL_STORAGE_DYNAMIC = 2, /** * The value structure has a static storage duration, and will never * be deallocated. * * When performing copy/retain, the existing structure may be referenced * without modification. */ BHND_NVRAM_VAL_STORAGE_STATIC = 3, } bhnd_nvram_val_storage; /** * @internal * * NVRAM data storage types. */ typedef enum { /** Value has no active representation. This is the default for * zero-initialized value structures. */ BHND_NVRAM_VAL_DATA_NONE = 0, /** Value data is represented inline */ BHND_NVRAM_VAL_DATA_INLINE = 1, /** * Value represented by an external reference to data with a static * storage location. The data need not be copied if copying the value. */ BHND_NVRAM_VAL_DATA_EXT_STATIC = 2, /** * Value represented by weak external reference, which must be copied * if copying the value. */ BHND_NVRAM_VAL_DATA_EXT_WEAK = 3, /** * Value represented by an external reference that must be deallocated * when deallocating the value. */ BHND_NVRAM_VAL_DATA_EXT_ALLOC = 4, } bhnd_nvram_val_data_storage; /** * NVRAM value */ struct bhnd_nvram_val { volatile u_int refs; /**< reference count */ bhnd_nvram_val_storage val_storage; /**< value structure storage */ const bhnd_nvram_val_fmt *fmt; /**< value format */ bhnd_nvram_val_data_storage data_storage; /**< data storage */ bhnd_nvram_type data_type; /**< data type */ size_t data_len; /**< data size */ /** data representation */ union { uint8_t u8[8]; /**< 8-bit unsigned data */ uint16_t u16[4]; /**< 16-bit unsigned data */ uint32_t u32[2]; /**< 32-bit unsigned data */ uint32_t u64[1]; /**< 64-bit unsigned data */ int8_t i8[8]; /**< 8-bit signed data */ int16_t i16[4]; /**< 16-bit signed data */ int32_t i32[2]; /**< 32-bit signed data */ int64_t i64[1]; /**< 64-bit signed data */ unsigned char ch[8]; /**< 8-bit character data */ bhnd_nvram_bool_t b[8]; /**< 8-bit boolean data */ const void *ptr; /**< external data */ } data; }; /** Declare a bhnd_nvram_val_fmt with name @p _n */ #define BHND_NVRAM_VAL_FMT_DECL(_n) \ extern const bhnd_nvram_val_fmt bhnd_nvram_val_ ## _n ## _fmt; BHND_NVRAM_VAL_FMT_DECL(bcm_decimal); BHND_NVRAM_VAL_FMT_DECL(bcm_hex); BHND_NVRAM_VAL_FMT_DECL(bcm_leddc); BHND_NVRAM_VAL_FMT_DECL(bcm_macaddr); BHND_NVRAM_VAL_FMT_DECL(bcm_string); BHND_NVRAM_VAL_FMT_DECL(uint8); BHND_NVRAM_VAL_FMT_DECL(uint16); BHND_NVRAM_VAL_FMT_DECL(uint32); BHND_NVRAM_VAL_FMT_DECL(uint64); BHND_NVRAM_VAL_FMT_DECL(int8); BHND_NVRAM_VAL_FMT_DECL(int16); BHND_NVRAM_VAL_FMT_DECL(int32); BHND_NVRAM_VAL_FMT_DECL(int64); BHND_NVRAM_VAL_FMT_DECL(char); BHND_NVRAM_VAL_FMT_DECL(bool); BHND_NVRAM_VAL_FMT_DECL(string); BHND_NVRAM_VAL_FMT_DECL(data); BHND_NVRAM_VAL_FMT_DECL(null); BHND_NVRAM_VAL_FMT_DECL(uint8_array); BHND_NVRAM_VAL_FMT_DECL(uint16_array); BHND_NVRAM_VAL_FMT_DECL(uint32_array); BHND_NVRAM_VAL_FMT_DECL(uint64_array); BHND_NVRAM_VAL_FMT_DECL(int8_array); BHND_NVRAM_VAL_FMT_DECL(int16_array); BHND_NVRAM_VAL_FMT_DECL(int32_array); BHND_NVRAM_VAL_FMT_DECL(int64_array); BHND_NVRAM_VAL_FMT_DECL(char_array); BHND_NVRAM_VAL_FMT_DECL(bool_array); BHND_NVRAM_VAL_FMT_DECL(string_array); /** Shared NULL value instance */ #define BHND_NVRAM_VAL_NULL (&bhnd_nvram_val_null) extern bhnd_nvram_val bhnd_nvram_val_null; #endif /* _BHND_NVRAM_BHND_NVRAM_VALUE_H_ */
