Main Page | Class Hierarchy | Alphabetical List | Class List | Directories | File List | Class Members | File Members | Related Pages

Long.d

Go to the documentation of this file.
00001 /*******************************************************************************
00002 
00003         @file Long.d
00004         
00005         Copyright (c) 2004 Kris Bell
00006         
00007         This software is provided 'as-is', without any express or implied
00008         warranty. In no event will the authors be held liable for damages
00009         of any kind arising from the use of this software.
00010         
00011         Permission is hereby granted to anyone to use this software for any 
00012         purpose, including commercial applications, and to alter it and/or 
00013         redistribute it freely, subject to the following restrictions:
00014         
00015         1. The origin of this software must not be misrepresented; you must 
00016            not claim that you wrote the original software. If you use this 
00017            software in a product, an acknowledgment within documentation of 
00018            said product would be appreciated but is not required.
00019 
00020         2. Altered source versions must be plainly marked as such, and must 
00021            not be misrepresented as being the original software.
00022 
00023         3. This notice may not be removed or altered from any distribution
00024            of the source.
00025 
00026         4. Derivative works are permitted, but they must carry this notice
00027            in full and credit the original source.
00028 
00029 
00030                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00031 
00032         
00033         @version        Initial version, Feb 2005
00034         @author         Kris
00035 
00036 
00037 *******************************************************************************/
00038 
00039 module mango.format.Long;
00040 
00041 private import mango.format.Number;
00042 
00043 /******************************************************************************
00044 
00045         A set of functions for converting between string and longint 
00046         values. Additional methods are inherited via the super-class
00047         Number.
00048 
00049         While these functions are all static, they are encapsulated within 
00050         a class inheritance to preserve some namespace cohesion. One might 
00051         use structs for encapsualtion instead, but then inheritance would 
00052         be lost. Note that the root class, Styled, is abstract to prevent 
00053         accidental instantiation of these classes.
00054 
00055 ******************************************************************************/
00056 
00057 class Long : Number
00058 {       
00059         alias Number.format format;
00060 
00061         /**********************************************************************
00062 
00063                 Format a longint based upon the Style provided. This
00064                 is used by the Format class to convert integer values.
00065                 See classes Styled & Format for more information.
00066 
00067         **********************************************************************/
00068 
00069         final static int format (long i, inout Style style)
00070         {
00071                 return style.emit (format (style.workspace[0..style.width], i, cast(NFormat) style.type, style.flags));
00072         }
00073 
00074 
00075         /**********************************************************************
00076 
00077                 Convert a longint using the provided NFormat and flags.
00078 
00079                 The traditional printf() conversion specifiers are adhered 
00080                 to, and the following types are supported:
00081 
00082                 u - unsigned decimal
00083                 d - signed decimal
00084                 o - octal
00085                 x - lowercase hexadecimal
00086                 X - uppercase hexadecimal
00087                 b - binary
00088 
00089                 Modifiers supported include:
00090 
00091                 #      : prefix the conversion with a type identifier
00092                 +      : prefix positive decimals with a '+'
00093                 space  : prefix positive decimals with one space
00094                 0      : left-pad the number with zeros
00095 
00096                 These modifiers are specifed via the 'flags' provided, 
00097                 and are represented via these identifiers:
00098 
00099                 #     : Flags.Hash
00100                 +     : Flags.Plus
00101                 space : Flags.Space
00102                 0     : Flags.Zero
00103 
00104         **********************************************************************/
00105 
00106         final static char[] format (long i, NFormat fmt = NFormat.Decimal, Flags flags = 0)
00107         {
00108                 return format (new char[64], i, fmt, flags);
00109         }
00110 
00111 
00112         /**********************************************************************
00113 
00114                 Parse a longint value from the provided 'src' string. 
00115                 The 'radix' used defaults to 10, but can specified as
00116                 desired. In particular, one should specify a radix of
00117                 zero to parse that also (via a type specifier).
00118 
00119         **********************************************************************/
00120 
00121         final static ulong parse (char[] src, uint radix=10, uint* ate=null)
00122         {
00123                 bool    sign;
00124                 ulong   value;
00125                 uint    count = trim (src, sign, &radix);
00126 
00127                 foreach (char c; src[count..length])
00128                         {
00129                         if (c >= '0' && c <= '9')
00130                            {}
00131                         else
00132                            if (c >= 'a' && c <= 'f')
00133                                c -= 39;
00134                            else
00135                               if (c >= 'A' && c <= 'F')
00136                                   c -= 7;
00137                               else
00138                                  break;
00139 
00140                         value = value * radix + (c - '0');
00141                         ++count;
00142                         }
00143 
00144                 if (ate)
00145                     *ate = count;
00146                 return sign ? -value : value;
00147         }
00148 }
00149 
00150 

Generated on Fri Nov 11 18:44:21 2005 for Mango by  doxygen 1.4.0