attributeblock.cpp

来自「我们自己写的miniSQL代码」· C++ 代码 · 共 81 行

// AttributeBlock.cpp: implementation of the AttributeBlock class.
//
//////////////////////////////////////////////////////////////////////

#include <memory.h>

#include "AttributeBlock.h"
#include "api_inte_struct.h"



//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

AttributeBlock::AttributeBlock()
{

}

AttributeBlock::~AttributeBlock()
{

}

void AttributeBlock::add_attri_list(table_info *ti,char* attri_head)
{
	int i;
	char* p = attri_head;
	for (i = 0; i < ti->n_attribute; i++)
	{
		//place order
		//attribute name
		//type
		//type length
		//is_unique
		memcpy(p,ti->attribute_name[i],sizeof(ti->attribute_name[i]));
		p += sizeof(ti->attribute_name[i]);
		
		*(int*) p = ti->type[i];
		p += sizeof(int);
		
		*(int*) p = ti->type_length[i];
		p += sizeof(int);

		*(int*) p = ti->is_unique[i];
		p += sizeof(int);

		if ( p - attri_head < 0 ) return; // need error handling
	}
}

void AttributeBlock::get_attri_list(char *attri_head,struct table_info* ti)
//need modify
//add n_attribute input
{
	char* p = attri_head;
	int i;
	for (i = 0 ; i< ti->n_attribute ; i++)
	{
		//place order
		//attribute name
		//type
		//type length
		//is_unique
		memcpy(ti->attribute_name[i], p ,sizeof(ti->attribute_name[i]));
		p += sizeof(ti->attribute_name[i]);
		
		ti->type[i] = *(int*) p ;
		p += sizeof(int);
		
		ti->type_length[i] = *(int*) p ;
		p += sizeof(int);

		ti->is_unique[i] = *(int*) p  ;
		p += sizeof(int);

	// need error handling
	}
}