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Double Class Reference

Inheritance diagram for Double:

Number List of all members.

Public Types

typedef double tValue

Private Types

enum  NFormat {
  Binary = 'b', Octal = 'o', Hex = 'x', HexUpper = 'X',
  Decimal = 'd', Unsigned = 'u'
}

Static Private Member Functions

static tValue pow10 (uint exp)
static tValue parse (char[] src, uint *ate=null)
static int format (double i, inout Style style)
static char[] format (char[] dst, tValue x, uint decimals=6, bool scientific=false)
static char[] format (char[] dst, long i, NFormat fmt=NFormat.Decimal, Flags flags=0)
static package uint trim (char[] digits, inout bool sign, uint *radix=null)

Detailed Description

A set of functions for converting between string and floating- point values.

While these functions are all static, they are encapsulated within a class inheritance to preserve some namespace cohesion. One might use structs for encapsualtion instead, but then inheritance would be lost. Note that the root class, Styled, is abstract to prevent accidental instantiation of these classes.

Definition at line 67 of file Double.d.


Member Typedef Documentation

typedef double tValue
 

Definition at line 69 of file Double.d.


Member Enumeration Documentation

enum NFormat [inherited]
 

Enumeration values:
Binary 
Octal 
Hex 
HexUpper 
Decimal 
Unsigned 

Definition at line 58 of file Number.d.


Member Function Documentation

static tValue pow10 uint  exp  )  [inline, static, private]
 

Internal function to convert an exponent specifier to a floating point value.

Definition at line 78 of file Double.d.

References assert().

Referenced by parse().

static tValue parse char[]  src,
uint *  ate = null
[inline, static, private]
 

Convert a formatted string of digits to a floating- point number. Good for general use, but use David Gay's dtoa package if serious rounding adjustments should be applied.

Definition at line 115 of file Double.d.

References memicmp(), pow10(), and Number::trim().

static int format double  i,
inout Style  style
[inline, static, private]
 

Convert float to string based upon Style bits.

Definition at line 192 of file Double.d.

References format().

Referenced by format().

static char [] format char[]  dst,
tValue  x,
uint  decimals = 6,
bool  scientific = false
[inline, static, private]
 

Convert a float to a string. This produces pretty good results for the most part, though one should use David Gay's dtoa package for best accuracy.

Note that the approach first normalizes a base10 mantissa, then pulls digits from the left side whilst emitting them (rightward) to the output.

Definition at line 212 of file Double.d.

References assert().

static char [] format char[]  dst,
long  i,
NFormat  fmt = NFormat.Decimal,
Flags  flags = 0
[inline, static, inherited]
 

Format numeric values into the provided output buffer. The traditional printf() conversion specifiers are adhered to, and the following types are supported:

u - unsigned decimal d - signed decimal o - octal x - lowercase hexadecimal X - uppercase hexadecimal b - binary

Modifiers supported include:

# : prefix the conversion with a type identifier + : prefix positive decimals with a '+' space : prefix positive decimals with one space 0 : left-pad the number with zeros

These modifiers are specifed via the 'flags' provided, and are represented via these identifiers:

# : Flags.Hash + : Flags.Plus space : Flags.Space 0 : Flags.Zero

Definition at line 90 of file Number.d.

References Styled::error().

static package uint trim char[]  digits,
inout bool  sign,
uint *  radix = null
[inline, static, inherited]
 

Strip leading whitespace, extract an optional numeric sign, and optionally strip and return a possible radix prefix.

This can be used as a precursor to the conversion of digits into a number.

Returns the number of matching characters.

Definition at line 197 of file Number.d.

Referenced by Long::parse(), Int::parse(), and parse().


The documentation for this class was generated from the following file:
Generated on Fri May 27 18:12:00 2005 for Mango by  doxygen 1.4.0