floatfld.h

CD_高级PALM编程

/********************************************************************
* FILE:				FloatFld.h
*
* DESCRIPTION:	The header file for the Field Fun project module.
*					It contains contants and data type definitions.
*
* VERSION:		1.0
**********************************************************************/

#include "FloatFldRsc.h"

//	Internal Constants

#define	APP_FILE_CREATOR			'PAKA'	// Palm Algorithms for Killer Applications
#define	MIN_ROM_MAJOR				3
#define	MIN_ROM_MINOR				1
#define	MIN_ROM_VERSION			sysMakeROMVersion ( MIN_ROM_MAJOR, MIN_ROM_MINOR, 0, sysROMStageDevelopment, 0 )

// Max # digits on either side of the decimal point of a number.
// Bounded by # of precise digits that can accurately be converted from long long to double
// and successfully stored in a double.

#define	MAX_LHS_DIGITS				17
#define	MAX_RHS_DIGITS				17
#define	VERY_SMALL_NUM			1.0e-15

// Max # digits in full floating point # string. MAX_DIGITS on each side of decimal point,
// + thousands separators each 3 chars on left, plus decimal + sign + terminator char.
// Because of floating point imprecisions, only about 15-16 digits TOTAL can be represented.

 #define	MAX_NSTR_LEN				MAX_LHS_DIGITS + MAX_RHS_DIGITS + (( MAX_LHS_DIGITS / 3 ) + 1 ) + 3
 
 Char		gNumStr [ MAX_NSTR_LEN ];	// Largest # chars in converted number string

// Localization globals

Char		gKSep, gDSep;				// 1000ths and decimal characters

// Internal function prototypes for non-Starter functions
// Check their definitions in the source code for parameter definitions

 static void  		SetPopup ( UInt16 popID, UInt16 listID, Int16 val );
static void		HandlePopup ( UInt16 popID );
static void 		MoveToNextField ( FormPtr frmP, UInt8 key );
static double		StringToDouble ( Char * strP );
static void 		DoubleToString ( double val, Char * dstP, Boolean localize,UInt8 precision,  UInt8 maxLen );
static Boolean 	CheckValidNumChar ( FieldPtr fldP, UInt8 key, UInt8 precision );
static void 		DisplayNumber ( void );