//

//

//      utility.c

//

//      Utility routines.

//      

//

//      Author:     Nick Thompson & Pablo Fernicola, with thanks to the QuickDraw 3D team

//

//      Copyright © 1992-95 Apple Computer, Inc., All Rights Reserved

//

//

#include "Tumbler_prototypes.h"

#include "Tumbler_utility.h"

//

//  PStrCmp returns true if the two given pascal strings are equal.

//

short PStrCmp(char *s1, char *s2)

{   short       size, index;

    size = s1[0] + 1;

    while (size--) {

        if (*(s1++) != *(s2++))

            return(false);

    }

    return(true);

}

//--------------------------------------------------------------------------------

// Given two rects, this function centers the second one within the first. 

void    CenterRectInRect(Rect *outerRect, Rect *innerRect)

{

    PositionRectInRect(outerRect, innerRect, FixRatio(1, 2), FixRatio(1, 2));

}

//-------------------------------------------------------------------------------------------

// Given two rectangles, this function positions the second within the first

// one so that it maintains the spacing specified by the horzRatio and

// vertRatio parameters.  In other words, to center an inner rectangle

// hoizontally, but have its center be 1/3 from the top of the outer rectangle,

// call this function with horzRatio = FixRatio(1, 2), vertRatio =

// FixRatio(1, 3).  We use Fixed rather than floating point to avoid

// complications when mixing MC68881/non-MC68881 versions of Utilities. 

void    PositionRectInRect(Rect *outerRect, Rect *innerRect, Fixed horzRatio, Fixed vertRatio)

{

    short   outerRectHeight;

    short   outerRectWidth;

    short   innerRectHeight;

    short   innerRectWidth;

    short   yLocation;

    short   xLocation;

    outerRectHeight = outerRect->bottom - outerRect->top;

    outerRectWidth = outerRect->right - outerRect->left;

    innerRectHeight = innerRect->bottom - innerRect->top;

    innerRectWidth = innerRect->right - innerRect->left;

        yLocation = Fix2Long(FixMul(Long2Fix(outerRectHeight - innerRectHeight), vertRatio))

            + outerRect->top;

        xLocation = Fix2Long(FixMul(Long2Fix(outerRectWidth - innerRectWidth), horzRatio))

            + outerRect->left;

    innerRect->top = yLocation;

    innerRect->left = xLocation;

    innerRect->bottom = yLocation + innerRectHeight;

    innerRect->right = xLocation + innerRectWidth;

}