/[dtapublic]/projs/trunk/shared_source/c_datd/esrg_int_def.h
ViewVC logotype

Annotation of /projs/trunk/shared_source/c_datd/esrg_int_def.h

Parent Directory Parent Directory | Revision Log Revision Log


Revision 71 - (hide annotations) (download)
Sat Nov 5 11:07:06 2016 UTC (7 years, 6 months ago) by dashley
File MIME type: text/plain
File size: 5277 byte(s)
Set EOL properties appropriately to facilitate simultaneous Linux and Windows development.
1 dashley 71 //$Header$
2     //-------------------------------------------------------------------------------------------------
3     //This file is part of "David T. Ashley's Shared Source Code", a set of shared components
4     //integrated into many of David T. Ashley's projects.
5     //-------------------------------------------------------------------------------------------------
6     //This source code and any program in which it is compiled/used is provided under the MIT License,
7     //reproduced below.
8     //-------------------------------------------------------------------------------------------------
9     //Permission is hereby granted, free of charge, to any person obtaining a copy of
10     //this software and associated documentation files(the "Software"), to deal in the
11     //Software without restriction, including without limitation the rights to use,
12     //copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
13     //Software, and to permit persons to whom the Software is furnished to do so,
14     //subject to the following conditions :
15     //
16     //The above copyright notice and this permission notice shall be included in all
17     //copies or substantial portions of the Software.
18     //
19     //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20     //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21     //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
22     //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23     //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24     //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25     //SOFTWARE.
26     //-------------------------------------------------------------------------------------------------
27     /* This module defines the default integer used by the Tcl/Tk interpreters
28     ** and by other software which does not explicitly deal with arbitrary length
29     ** integers. The hope is that, over time, the Tcl core can be migrated to use
30     ** this functionality. What should happen is that, with the flip of a preprocessor
31     ** switch, the default integer size can be changed.
32     **
33     ** The only real guideline for the size is that it must be at least as large
34     ** as the maximum size of a file.
35     **
36     ** It is felt at the present time that 128-bit integers should be adequate for
37     ** just about everything.
38     */
39     //--------------------------------------------------------------------------------
40     #ifndef ESRG_INT_DEF_H_INCLUDED
41     #define ESRG_INT_DEF_H_INCLUDED
42    
43     #ifdef MODULE_ESRG_INT_DEF
44     #define DECMOD_ESRG_INT_DEF
45     #else
46     #define DECMOD_ESRG_INT_DEF extern
47     #endif
48    
49     //Configuration constants.
50     #define ESRG_INT_DEF_BITSIZE (128)
51     //The size, in bits, of each integer. This must be a multiple of the machines
52     //native integer size.
53     #define ESRG_INT_DEF_NATIVE_BITSIZE (32)
54     //The size, in bits, of the native int of the machine. This may be
55     //any positive integer.
56     #define ESRG_INT_DEF_NLIMBS (ESRG_INT_DEF_BITSIZE/ESRG_INT_DEF_NATIVE_BITSIZE)
57     //The number of native integers required for each of the default
58     //integers.
59    
60     struct ESRG_INT_DEF_struct
61     {
62     unsigned int flags;
63     //The flags, as defined below.
64     #define ESRG_INT_DEF_FLAG_IS_SIGNED (0x00000001)
65     //Integer is signed. Defined at creation time and not changed.
66     #define ESRG_INT_DEF_FLAG_NEG_ROLL (0x00000002)
67     #define ESRG_INT_DEF_FLAG_POS_ROLL (0x00000004)
68     //TRUE if has rolled over in a negative way or positive way.
69     //Depending on what is being done, this may mean result is invalid.
70     #define ESRG_INT_DEF_FLAG_NAN (0x00000008)
71     //TRUE if the result is not a number. This may be from division by zero,
72     //square root of a negative number, etc.
73     unsigned int limbs[ESRG_INT_DEF_NLIMBS];
74     //The limbs of the integer. These are arranged with the least significant
75     //limb as [0], i.e. things are arranged least-significant component first.
76     //If the integer is signed, it is a concatenated two's complement representation--
77     //same as the ideal, but spread over multiple native ints.
78     };
79    
80     typedef struct ESRG_INT_DEF_struct ESRG_INT_DEF_INT;
81    
82     //Required initialization before doing anything.
83     //Destruction is not required--only initialization before
84     //the first assignment or use.
85     DECMOD_ESRG_INT_DEF void ESRG_INT_DEF_Create
86     ( ESRG_INT_DEF_INT *arg ,
87     int is_signed);
88    
89     //Assigns a machine native unsigned integer to the value.
90     DECMOD_ESRG_INT_DEF void ESRG_INT_DEF_AssignU
91     ( ESRG_INT_DEF_INT *arg ,
92     unsigned int aval);
93    
94     //Assigns a machine native signed integer to the value.
95     DECMOD_ESRG_INT_DEF void ESRG_INT_DEF_AssignS
96     ( ESRG_INT_DEF_INT *arg,
97     int aval);
98    
99     //Compares two values to see their relative relationship.
100     //Returned values are -1 if a<b, 0 if a==b, and 1 if a>b.
101     //All cases of signed/unsigned mixes are handled. Only the
102     //bit patterns of the operands are considered--whether they
103     //are the result of rollovers, etc., is not considered.
104     DECMOD_ESRG_INT_DEF int ESRG_INT_DEF_Cmp
105     ( ESRG_INT_DEF_INT *a,
106     ESRG_INT_DEF_INT *b );
107    
108     #endif
109    
110     //End of esrg_int_def.h.

Properties

Name Value
svn:eol-style native
svn:keywords Header

dashley@gmail.com
ViewVC Help
Powered by ViewVC 1.1.25