allocdp.c

来自「speech signal process tools」· C语言 代码 · 共 29 行

allocdp(p_p_block,n)	/* allocate a double pointer */
int n;
double **p_p_block;
{
	/*
	assume an 8 byte 64 bit double  
	program calls malloc to establish storage for a block of n doubles
	p_block is a pointer to the block
	p_p_block is a pointer to the pointer p_block

	return(0) for sucessful allocation
	return(1) for unsucessful allocation
	*/

	char *p_char,*malloc();
	unsigned size;

	if(*p_p_block!=0)
		{
		printf("allocdp expects a null p_block\n");
		exit(1);
		}
	size= 8*n;
	p_char=malloc(size);
	if(p_char==0)return(1);
	*p_p_block = (double *)p_char;
	return(0);
}