vector.c

来自「dos 1.0 其中包含quick basic源代码、内存管理himem emm」· C语言 代码 · 共 54 行

/*  vector.c - simple vector management
 *
 *  Modifications:
 *
 *	12-May-1988 mz	Add VECTOR typedef
 *
 */
#include <malloc.h>
#include "..\h\tools.h"

#define DELTA 10

VECTOR *VectorAlloc (count)
int count;
{
    register VECTOR *v;

    v = (VECTOR *) (*tools_alloc) (sizeof (*v) + (count-1) * sizeof (void *));
    if (v != NULL) {
	v->vmax  = count;
	v->count = 0;
	}
    return v;
}

flagType fAppendVector (ppVec, val)
VECTOR **ppVec;
void * val;
{
    register VECTOR *pVec = *ppVec;

    if (pVec == NULL)
	if ((pVec = VectorAlloc (DELTA)) == NULL)
	    return FALSE;
	else
	    ;
    else
    if (pVec->vmax == pVec->count) {
	register VECTOR *v;

	if ((v = VectorAlloc (DELTA + pVec->vmax)) == NULL)
	    return FALSE;
	Move ((char far *)(pVec->elem),
	      (char far *)(v->elem),
	      sizeof (v->elem[0]) * pVec->count);
	v->count = pVec->count;
	free ((char *) pVec);
	pVec = v;
	}
    pVec->elem[pVec->count++] = (void *) val;
    *ppVec = pVec;
    return TRUE;
}