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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tlv_ds.h"
typedef enum tlv_type_length_enum
{
tlv_u8_e ,
tlv_u16_e,
tlv_u32_e,
tlv_u64_e,
}tlv_type_length_e;
#define tlv_other_e (tlv_u64_e+1)
#pragma pack(1)
typedef struct tlv_uint8
{
uint8_t type;
uint8_t length;
char value[0];
}tlv_u8_t;
typedef struct tlv_uint16
{
uint16_t type;
uint16_t length;
char value[0];
}tlv_u16_t;
typedef struct tlv_uint32
{
uint32_t type;
uint32_t length;
char value[0];
}tlv_u32_t;
typedef struct tlv_uint64
{
uint64_t type;
uint64_t length;
char value[0];
}tlv_u64_t;
#pragma pack()
typedef union tlv_type_union
{
tlv_u8_t *tlv_u8;
tlv_u16_t *tlv_u16;
tlv_u32_t *tlv_u32;
tlv_u64_t *tlv_u64;
}tlv_type_u;
typedef struct _tlv_ds_t _tlv_ds_t;
struct _tlv_ds_t {
tlv_ds_t public;
int8_t *data;
tlv_type_u *tlv_list;
tlv_type_length_e tlv_type;
size_t elem_size;
size_t length;
uint32_t cursor;
};
static __thread _tlv_ds_t *this = NULL;
static size_t tlv_elem_size(void)
{
return this->elem_size;
}
static size_t tlv_length(void)
{
return this->length;
}
#define tlv_init_func_def(_x) \
static int CAT2(tlv_init_, _x)(const void *data, size_t data_len) \
{ \
tlv_type_u tlv_u = {0}; \
if(this->data || this->cursor || this->tlv_list) return -1; \
this->tlv_type = CAT3(tlv_, _x, _e); \
this->data = calloc(1, data_len); \
this->length = data_len; \
memcpy(this->data, data, data_len); \
for(this->cursor = 0; this->cursor < data_len; this->elem_size++) \
{ \
tlv_u.CAT2(tlv_, _x) = (CAT3(tlv_, _x, _t) *)&this->data[this->cursor]; \
if(tlv_u.CAT2(tlv_, _x)->length == 0 || this->cursor + tlv_u.CAT2(tlv_, _x)->length > data_len) { \
this->public.clear(); \
return -1; \
} \
this->cursor += tlv_u.CAT2(tlv_, _x)->length; \
this->tlv_list = realloc(this->tlv_list, (this->elem_size + 1) * sizeof(tlv_type_u)); \
this->tlv_list[this->elem_size] = tlv_u; \
} \
if(this->cursor != data_len) { \
this->public.clear(); \
return -1; \
} \
return 0; \
}
#define tlv_append_func_def(_x) \
static int CAT2(tlv_append_, _x)(_x type, _x length, void *value) \
{\
if(this->tlv_type != CAT3(tlv_, _x, _e) || this->tlv_type != tlv_other_e) return -1; \
this->tlv_type = CAT3(tlv_, _x, _e); \
this->data = realloc(this->data, length); \
this->length += length; \
this->tlv_list = realloc(this->tlv_list, (this->elem_size + 1) * sizeof(tlv_type_u)); \
this->tlv_list[this->elem_size].CAT2(tlv_, _x) = (CAT3(tlv_, _x, _t) *)&this->data[this->cursor]; \
this->tlv_list[this->elem_size].CAT2(tlv_, _x)->type = type; \
this->tlv_list[this->elem_size].CAT2(tlv_, _x)->length = length; \
if(length > sizeof(CAT3(tlv_, _x, _t)) && value) { \
memcpy(this->tlv_list[this->elem_size].CAT2(tlv_, _x)->value, value, (length - sizeof(CAT3(tlv_, _x, _t)))); \
} \
this->elem_size++; \
this->cursor += length; \
return 0; \
}
#define tlv_get_func_def(_x) \
static int CAT2(tlv_get_, _x)(_x type, void *value, size_t value_len) \
{ \
if((this->tlv_type != CAT3(tlv_, _x, _e)) || !this->data || !this->cursor || !this->tlv_list) return -1; \
for(size_t idx = 0; idx < this->elem_size; idx++) \
{ \
if(this->tlv_list[idx].CAT2(tlv_, _x)->type == type && \
this->tlv_list[idx].CAT2(tlv_, _x)->length == (value_len + sizeof(CAT3(tlv_, _x, _t)))) \
{ \
memcpy(value, this->tlv_list[idx].CAT2(tlv_, _x)->value, value_len); \
return 0; \
} \
} \
return -1; \
}
tlv_init_func_def(u8)
tlv_init_func_def(u16)
tlv_init_func_def(u32)
tlv_init_func_def(u64)
tlv_append_func_def(u8)
tlv_append_func_def(u16)
tlv_append_func_def(u32)
tlv_append_func_def(u64)
tlv_get_func_def(u8)
tlv_get_func_def(u16)
tlv_get_func_def(u32)
tlv_get_func_def(u64)
static void tlv_clear(void)
{
if(this->data) free(this->data);
if(this->tlv_list) free(this->tlv_list);
this->data = NULL;
this->tlv_list = NULL;
this->tlv_type = tlv_other_e;
this->elem_size = 0;
this->length = 0;
this->cursor = 0;
}
static void tlv_destory(void)
{
if(!this) return;
this->public.clear();
free(this);
this = NULL;
return;
}
tlv_ds_t *the_tlv(tlv_ds_t *public)
{
this = (_tlv_ds_t *)public;
return &this->public;
}
tlv_ds_t *tlv_ds_create(void)
{
_tlv_ds_t *_this = (_tlv_ds_t *)malloc(sizeof(_tlv_ds_t));
_this->public.init_u8 = &tlv_init_u8;
_this->public.init_u16 = &tlv_init_u16;
_this->public.init_u32 = &tlv_init_u32;
_this->public.init_u64 = &tlv_init_u64;
_this->public.append_u8 = &tlv_append_u8;
_this->public.append_u16= &tlv_append_u16;
_this->public.append_u32= &tlv_append_u32;
_this->public.append_u64= &tlv_append_u64;
_this->public.get_u8 = &tlv_get_u8;
_this->public.get_u16 = &tlv_get_u16;
_this->public.get_u32 = &tlv_get_u32;
_this->public.get_u64 = &tlv_get_u64;
_this->public.elem_size = &tlv_elem_size;
_this->public.length = &tlv_length;
_this->public.clear = &tlv_clear;
_this->public.destory = &tlv_destory;
_this->data = NULL;
_this->tlv_list = NULL;
_this->tlv_type = tlv_other_e;
_this->elem_size = 0;
_this->length = 0;
_this->cursor = 0;
return &_this->public;
}
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