124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
#ifndef __KVT_H
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#define __KVT_H
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#include <stdint.h>
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#include <stdio.h>
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#include "mavl.h"
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/**
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* @addtogroup DATAMGMT Data Structures & Algos
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* @{
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*/
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/**
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* @defgroup KTV Key-Type-Value-Store
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* @{
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*/
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#define CW_KTV_MAX_KEY_LEN 1024
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struct cw_KTV {
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char *key;
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const struct cw_Type *type;
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union {
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uint32_t dword;
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uint16_t word;
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uint8_t byte;
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void *ptr;
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int boolean;
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} val;
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};
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typedef struct cw_KTV cw_KTV_t;
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/**
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* @class cw_Type
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* @author 7u83
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* @file ktv.h
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* @brief Representation of a cw_Type objetc
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*/
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struct cw_Type {
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/** A human readable name for this type */
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const char *name;
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/** A pointer to a function to delete elements of this type */
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void (*del) (struct cw_KTV * data);
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/** A method to put this object to a buffer */
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int (*put) (const struct cw_KTV * data, uint8_t * dst);
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/** The get method */
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struct cw_KTV *(*get) (struct cw_KTV * data, const uint8_t * src, int len);
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/** A pointer to a function to convert elements of this type to a string.
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* This function is mainly used to store elements to an SQL database
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* or to json strings
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* @param data pointer to KTV object
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* @param dst buffer where to put the string in
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* @param max_len maximum length of buffer
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* @return The number of bytes written to dst
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*/
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int (*to_str) (const struct cw_KTV * data, char *dst, int max_len);
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/** Cereate an item of this type from a string, which was previously
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created by the #del function. */
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struct cw_KTV *(*from_str) (struct cw_KTV * data, const char *src);
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int (*len)(cw_KTV_t *);
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};
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typedef struct cw_Type cw_Type_t;
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extern const struct cw_Type cw_type_byte;
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extern const struct cw_Type cw_type_word;
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extern const struct cw_Type cw_type_dword;
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extern const struct cw_Type cw_type_bstr16;
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#define CW_TYPE_BYTE (&cw_type_byte)
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#define CW_TYPE_WORD (&cw_type_word)
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#define CW_TYPE_DWORD (&cw_type_dword)
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#define CW_TYPE_BSTR16 (&cw_type_bstr16)
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/*
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void cw_kvstore_mavl_delete(const void *data);
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*/
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cw_KTV_t *cw_ktv_add(mavl_t kvstore, const char *key, const struct cw_Type *type,
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const uint8_t * data, int len);
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const char * cw_ktv_add_from_str(mavl_t kvtstore, const char *key, const struct cw_Type *type,
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const char * str);
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int cw_ktv_mavlcmp(const void *v1, const void *v2);
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int cw_ktv_mavlcmp_type_by_name(const void *v1,const void *v2);
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void cw_ktv_mavldel(void *data);
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/**
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* Create a KTV store
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* @return a #mavl_t object representing the KTV store
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*/
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#define cw_ktv_create()\
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mavl_create(cw_ktv_mavlcmp, cw_ktv_mavldel, sizeof(cw_KTV_t))
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#define cw_ktv_create_types_tree()\
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mavl_create(cw_ktv_mavlcmp_type_by_name,NULL,sizeof(struct cw_Type *))
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int cw_ktv_read_line (FILE *f, char * key, char * type, char *val);
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int cw_ktv_read_file(FILE * file, mavl_t ktv, mavl_t types);
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cw_KTV_t * cw_ktv_get(mavl_t ktv, const char *key, const cw_Type_t * type);
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uint8_t cw_ktv_get_byte(mavl_t ktv,const char *key, uint8_t def);
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uint16_t cw_ktv_get_word(mavl_t ktv,const char *key, uint16_t def);
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extern const cw_Type_t * cw_ktv_std_types[];
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#define CW_KTV_STD_TYPES cw_ktv_std_types
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/**
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* @} KTV
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* @} DATAMGMT
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*/
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#endif /* __KVT_H */
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