eudora-mac/sort.c

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COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
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#include "sort.h"
#define FILE_NUM 36
/* Copyright (c) 1990-1992 by the University of Illinois Board of Trustees */
/* Copyright (c) 1994 by QUALCOMM Incorporated */

#pragma segment Misc

#define ARRAY(i)				(array+i*size)
void QSort(UPtr array, int size, int f, int l, int (*compare)(), void (*swap)());
/**********************************************************************
 * QuickSort - sort an array
 * Algorithms, Reingold, Nievergelt, Deo, p. 286
 **********************************************************************/
void QuickSort(UPtr array, int size, int f, int l, int (*compare)(), void (*swap)())
{
	int i,j;
	if (f>=l) return;

#ifdef NEVER
	ComposeLogS(-1,nil,"\pSort %d %d",f,l);
#endif	
	CycleBalls();
	
	(*swap)(ARRAY(f),ARRAY((f+l)/2));
	
	for (i=f+1; i<=l && (*compare)(ARRAY(i),ARRAY(f))<0; i++);
	
	for (j=l; j>=f && (*compare)(ARRAY(j),ARRAY(f))>0; j--);
	
	while (i<j)
	{
		(*swap)(ARRAY(i),ARRAY(j));
		for (i++; (*compare)(ARRAY(i),ARRAY(f))<0; i++);
		for (j--; (*compare)(ARRAY(j),ARRAY(f))>0; j--);
	}
	
	(*swap)(ARRAY(f),ARRAY(j));
	
	if ((j-1)-f > l-(j+1))
	{
		QuickSort(array,size,j+1,l,compare,swap);
		QuickSort(array,size,f,j-1,compare,swap);
	}
	else
	{
		QuickSort(array,size,f,j-1,compare,swap);
		QuickSort(array,size,j+1,l,compare,swap);
	}
}

#define VectorSwap(x,y) do{M_T1=(*vector)[x];(*vector)[x]=(*vector)[y];(*vector)[y]=M_T1;}while(0)
/**********************************************************************
 * VQuickSort - sort a vector into something else
 * Algorithms, Reingold, Nievergelt, Deo, p. 286
 **********************************************************************/
void VQuickSort(short **vector, short f, short l, void *data, int (*compare)())
{
	int i,j;
	if (f>=l) return;

#ifdef NEVER
	ComposeLogS(-1,nil,"\pSort %d %d",f,l);
#endif	
	CycleBalls();
	
	VectorSwap(f,(f+l)/2);
	
	for (i=f+1; i<=l && (*compare)(vector,data,i,f)<0; i++);
	
	for (j=l; j>=f && (*compare)(vector,data,j,f)>0; j--);
	
	while (i<j)
	{
		VectorSwap(i,j);
		for (i++; (*compare)(vector,data,i,f)<0; i++);
		for (j--; (*compare)(vector,data,j,f)>0; j--);
	}
	
	VectorSwap(f,j);
	
	if ((j-1)-f > l-(j+1))
	{
		VQuickSort(vector,j+1,l,data,compare);
		VQuickSort(vector,f,j-1,data,compare);
	}
	else
	{
		VQuickSort(vector,f,j-1,data,compare);
		VQuickSort(vector,j+1,l,data,compare);
	}
}

void StrSwap(UPtr s1, UPtr s2)
{
	Str255 temp;
	
	BMD(s1,temp,*(unsigned char *)s1+1);
	BMD(s2,s1,