Lib:Architecture/Base Layer/Floating Point Arithmetic Module

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Library Module
Floating-Point Arithmetic Module
Layer	Base
API Documentation	Reference Manual
Source Files	src/base/pdf-fp.h src/base/pdf-fp.c

1 Overview
2 Floating-Point Numbers
3 Points
4 Rectangles
5 Quadrilaterals
6 Matrices
7 Interpolation
- 7.1 N-dimensional Linear Interpolation
- 7.2 N-dimensional Cubic Spline Interpolation

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Overview

This module provides system-independent floating point real numbers and several related facilities such as matrix and points manipulations, interpolation routines, real to string and string to real conversion and rounding.

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Floating-Point Numbers

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Points

This module should support the notion of two-dimensional cartesian points. Points are defined by a horizontal coordinate and a vertical coordinate. The coordinates are floating-point numbers.

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Rectangles

A floating-point rectangle

This module should support the notion of rectangles characterized by a upper coordinate, a bottom coordinate, a left coordinate and a right coordinate. The sides defining the rectangle are thus vertical or horizontal and two opposite sides are always parallel.

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Quadrilaterals

A floating-point quadrilateral

Quadrilaterals are like rectangles but the sides can be of a distinct length, vertical and horizontal orientation is not mandatory and opposite sides doesn't need to be parallel.

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Matrices

A floating-point matrix

This module supports matrices composed by three rows of three floating-point numbers. Several matrix-related operations should be supported and are described below.

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