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sf_code/esrgpcpj/shared/tclxtens/pr_randa.c revision 25 by dashley, Sat Oct 8 06:43:03 2016 UTC projs/trunk/shared_source/c_tclxtens_7_5/pr_randa.c revision 71 by dashley, Sat Nov 5 11:07:06 2016 UTC
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1  /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tclxtens/pr_randa.c,v 1.1.1.1 2001/06/13 04:31:15 dtashley Exp $ */  //$Header$
2    //-------------------------------------------------------------------------------------------------
3  //--------------------------------------------------------------------------------  //This file is part of "David T. Ashley's Shared Source Code", a set of shared components
4  //Copyright 2001 David T. Ashley  //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 GNU GENERAL  //This source code and any program in which it is compiled/used is provided under the MIT License,
7  //PUBLIC LICENSE, Version 3, full license text below.  //reproduced below.
8  //-------------------------------------------------------------------------------------------------  //-------------------------------------------------------------------------------------------------
9  //                    GNU GENERAL PUBLIC LICENSE  //Permission is hereby granted, free of charge, to any person obtaining a copy of
10  //                       Version 3, 29 June 2007  //this software and associated documentation files(the "Software"), to deal in the
11  //  //Software without restriction, including without limitation the rights to use,
12  // Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>  //copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
13  // Everyone is permitted to copy and distribute verbatim copies  //Software, and to permit persons to whom the Software is furnished to do so,
14  // of this license document, but changing it is not allowed.  //subject to the following conditions :
15  //  //
16  //                            Preamble  //The above copyright notice and this permission notice shall be included in all
17  //  //copies or substantial portions of the Software.
18  //  The GNU General Public License is a free, copyleft license for  //
19  //software and other kinds of works.  //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  //  The licenses for most software and other practical works are designed  //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
22  //to take away your freedom to share and change the works.  By contrast,  //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23  //the GNU General Public License is intended to guarantee your freedom to  //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  //share and change all versions of a program--to make sure it remains free  //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25  //software for all its users.  We, the Free Software Foundation, use the  //SOFTWARE.
26  //GNU General Public License for most of our software; it applies also to  //-------------------------------------------------------------------------------------------------
27  //any other work released this way by its authors.  You can apply it to  #define MODULE_PR_RANDA
28  //your programs, too.  
29  //  #include "tcl.h"
30  //  When we speak of free software, we are referring to freedom, not  #include "tcldecls.h"
31  //price.  Our General Public Licenses are designed to make sure that you  
32  //have the freedom to distribute copies of free software (and charge for  #include "pr_randa.h"
33  //them if you wish), that you receive source code or can get it if you  
34  //want it, that you can change the software or use pieces of it in new  
35  //free programs, and that you know you can do these things.  /* Random seed used in this module.
36  //  */
37  //  To protect your rights, we need to prevent others from denying you  static unsigned long seed = 1578127215;
38  //these rights or asking you to surrender the rights.  Therefore, you have  
39  //certain responsibilities if you distribute copies of the software, or if  
40  //you modify it: responsibilities to respect the freedom of others.  /* Returns the random successor of the argument.
41  //  ** Uses the power residue method discussed
42  //  For example, if you distribute copies of such a program, whether  ** in a probability book.  Is public so that other
43  //gratis or for a fee, you must pass on to the recipients the same  ** modules may use it.
44  //freedoms that you received.  You must make sure that they, too, receive  */
45  //or can get the source code.  And you must show them these terms so they  DECMOD_PR_RANDA unsigned long PrRandARandSucc(unsigned long arg)
46  //know their rights.     {
47  //     __int64 k16807;
48  //  Developers that use the GNU GPL protect your rights with two steps:     __int64 input_arg;
49  //(1) assert copyright on the software, and (2) offer you this License     __int64 mul_result;
50  //giving you legal permission to copy, distribute and/or modify it.     __int64 return_value;
51  //     __int64 M;
52  //  For the developers' and authors' protection, the GPL clearly explains  
53  //that there is no warranty for this free software.  For both users' and     k16807 = 16807;
54  //authors' sake, the GPL requires that modified versions be marked as     M = 2147483647;
55  //changed, so that their problems will not be attributed erroneously to     input_arg = arg;
56  //authors of previous versions.     mul_result = k16807 * input_arg;
57  //     return_value = mul_result % M;
58  //  Some devices are designed to deny users access to install or run     return((unsigned long)return_value);
59  //modified versions of the software inside them, although the manufacturer     }
60  //can do so.  This is fundamentally incompatible with the aim of  
61  //protecting users' freedom to change the software.  The systematic  
62  //pattern of such abuse occurs in the area of products for individuals to  /* The command which requires the previous value to go on to
63  //use, which is precisely where it is most unacceptable.  Therefore, we  ** the next.
64  //have designed this version of the GPL to prohibit the practice for those  */
65  //products.  If such problems arise substantially in other domains, we  int PrRandA_rngPwrResRndA_cmd(ClientData dummy,
66  //stand ready to extend this provision to those domains in future versions                                Tcl_Interp *interp,
67  //of the GPL, as needed to protect the freedom of users.                                     int objc,
68  //                                     Tcl_Obj *objv[])
69  //  Finally, every program is threatened constantly by software patents.     {
70  //States should not allow patents to restrict development and use of          int i;
71  //software on general-purpose computers, but in those that do, we wish to        //Passed integer if one present.
72  //avoid the special danger that patents applied to a free program could          Tcl_Obj *rv;
73  //make it effectively proprietary.  To prevent this, the GPL assures that        //Object to return.
74  //patents cannot be used to render the program non-free.     char *problem_arg;
75  //        //String value of problem argument if we need to announce
76  //  The precise terms and conditions for copying, distribution and        //it to caller.
77  //modification follow.  
78  //     //We need to break this into three cases.  Either
79  //                       TERMS AND CONDITIONS     //there is one arg, which means use internal seed.
80  //     //Or, there are two args, which means the predecessor
81  //  0. Definitions.     //is supplied.  Or, there are more args, which means
82  //     //error.
83  //  "This License" refers to version 3 of the GNU General Public License.     if (objc == 1)
84  //        {
85  //  "Copyright" also means copyright-like laws that apply to other kinds of        //Use internal seed.
86  //works, such as semiconductor masks.        rv = Tcl_NewIntObj(seed);
87  //        seed = PrRandARandSucc(seed);
88  //  "The Program" refers to any copyrightable work licensed under this        Tcl_SetObjResult(interp, rv);
89  //License.  Each licensee is addressed as "you".  "Licensees" and        return(TCL_OK);
90  //"recipients" may be individuals or organizations.        }
91  //     else if (objc == 2)
92  //  To "modify" a work means to copy from or adapt all or part of the work        {
93  //in a fashion requiring copyright permission, other than the making of an        //Form successor of number passed.
94  //exact copy.  The resulting work is called a "modified version" of the        if (Tcl_GetIntFromObj(interp, objv[1], &i) != TCL_OK)
95  //earlier work or a work "based on" the earlier work.           {
96  //           //We could not retrieve an integer from the passed argument.
97  //  A "covered work" means either the unmodified Program or a work based           //We can't form the successor of a non-integer.
98  //on the Program.           //Error out.
99  //  
100  //  To "propagate" a work means to do anything with it that, without           //Create the return object.
101  //permission, would make you directly or secondarily liable for           rv = Tcl_NewStringObj("rngPwrResRndA: can't parse this argument as an integer: ", -1);
102  //infringement under applicable copyright law, except executing it on a  
103  //computer or modifying a private copy.  Propagation includes copying,           //Tack on the offensive argument.
104  //distribution (with or without modification), making available to the           problem_arg = Tcl_GetString(objv[1]);
105  //public, and in some countries other activities as well.           Tcl_AppendToObj(rv, problem_arg, -1);
106  //  
107  //  To "convey" a work means any kind of propagation that enables other           //Set the return value to be the error message.
108  //parties to make or receive copies.  Mere interaction with a user through           Tcl_SetObjResult(interp, rv);
109  //a computer network, with no transfer of a copy, is not conveying.  
110  //           //Error return.
111  //  An interactive user interface displays "Appropriate Legal Notices"           return(TCL_ERROR);
112  //to the extent that it includes a convenient and prominently visible           }
113  //feature that (1) displays an appropriate copyright notice, and (2)  
114  //tells the user that there is no warranty for the work (except to the        rv = Tcl_NewIntObj(PrRandARandSucc(i));
115  //extent that warranties are provided), that licensees may convey the        Tcl_SetObjResult(interp, rv);
116  //work under this License, and how to view a copy of this License.  If        return(TCL_OK);
117  //the interface presents a list of user commands or options, such as a        }
118  //menu, a prominent item in the list meets this criterion.     else //Wrong number of args.
119  //        {
120  //  1. Source Code.             Tcl_WrongNumArgs(interp,
121  //                         1,
122  //  The "source code" for a work means the preferred form of the work                         objv,
123  //for making modifications to it.  "Object code" means any non-source                         "?N?");
124  //form of a work.        return(TCL_ERROR);
125  //        }
126  //  A "Standard Interface" means an interface that either is an official     }
127  //standard defined by a recognized standards body, or, in the case of  
128  //interfaces specified for a particular programming language, one that  
129  //is widely used among developers working in that language.  //Performs initial registration to the hash table.
130  //  //
131  //  The "System Libraries" of an executable work include anything, other  DECMOD_PR_RANDA void PrRandAInit(Tcl_Interp *interp)
132  //than the work as a whole, that (a) is included in the normal form of     {
133  //packaging a Major Component, but which is not part of that Major     Tcl_CreateObjCommand(interp,
134  //Component, and (b) serves only to enable use of the work with that                               "rngPwrResRndA",
135  //Major Component, or to implement a Standard Interface for which an                          (Tcl_ObjCmdProc *)PrRandA_rngPwrResRndA_cmd,
136  //implementation is available to the public in source code form.  A                                                   NULL,
137  //"Major Component", in this context, means a major essential component                                                   NULL);
138  //(kernel, window system, and so on) of the specific operating system     }
139  //(if any) on which the executable work runs, or a compiler used to  
140  //produce the work, or an object code interpreter used to run it.  
141  //  DECMOD_PR_RANDA const char *PrRandACversion(void)
142  //  The "Corresponding Source" for a work in object code form means all  {  
143  //the source code needed to generate, install, and (for an executable      return ("$Header$");
144  //work) run the object code and to modify the work, including scripts to  }
145  //control those activities.  However, it does not include the work's  
146  //System Libraries, or general-purpose tools or generally available free  
147  //programs which are used unmodified in performing those activities but  DECMOD_PR_RANDA const char *PrRandAHversion(void)
148  //which are not part of the work.  For example, Corresponding Source  {  
149  //includes interface definition files associated with source files for      return (PR_RANDA_H_VERSION);
150  //the work, and the source code for shared libraries and dynamically  }
151  //linked subprograms that the work is specifically designed to require,  
152  //such as by intimate data communication or control flow between those  /* End of pr_randa.c */
 //subprograms and other parts of the work.  
 //  
 //  The Corresponding Source need not include anything that users  
 //can regenerate automatically from other parts of the Corresponding  
 //Source.  
 //  
 //  The Corresponding Source for a work in source code form is that  
 //same work.  
 //  
 //  2. Basic Permissions.  
 //  
 //  All rights granted under this License are granted for the term of  
 //copyright on the Program, and are irrevocable provided the stated  
 //conditions are met.  This License explicitly affirms your unlimited  
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 //covered work is covered by this License only if the output, given its  
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 /* IJS_SM_FILE_PUBLIC */  
   
 #define MODULE_PR_RANDA  
   
 #include "tcl.h"  
 #include "tcldecls.h"  
   
 #include "pr_randa.h"  
   
   
 /* Random seed used in this module.  
 */  
 static unsigned long seed = 1578127215;  
   
   
 /* Returns the random successor of the argument.  
 ** Uses the power residue method discussed  
 ** in a probability book.  Is public so that other  
 ** modules may use it.  
 */  
 DECMOD_PR_RANDA unsigned long PrRandARandSucc(unsigned long arg)  
    {  
    __int64 k16807;  
    __int64 input_arg;  
    __int64 mul_result;  
    __int64 return_value;  
    __int64 M;  
   
    k16807 = 16807;  
    M = 2147483647;  
    input_arg = arg;  
    mul_result = k16807 * input_arg;  
    return_value = mul_result % M;  
    return((unsigned long)return_value);  
    }  
   
   
 /* The command which requires the previous value to go on to  
 ** the next.  
 */  
 int PrRandA_rngPwrResRndA_cmd(ClientData dummy,  
                               Tcl_Interp *interp,  
                                    int objc,  
                                    Tcl_Obj *objv[])  
    {  
         int i;  
       //Passed integer if one present.  
         Tcl_Obj *rv;  
       //Object to return.  
    char *problem_arg;  
       //String value of problem argument if we need to announce  
       //it to caller.  
   
    //We need to break this into three cases.  Either  
    //there is one arg, which means use internal seed.  
    //Or, there are two args, which means the predecessor  
    //is supplied.  Or, there are more args, which means  
    //error.  
    if (objc == 1)  
       {  
       //Use internal seed.  
       rv = Tcl_NewIntObj(seed);  
       seed = PrRandARandSucc(seed);  
       Tcl_SetObjResult(interp, rv);  
       return(TCL_OK);  
       }  
    else if (objc == 2)  
       {  
       //Form successor of number passed.  
       if (Tcl_GetIntFromObj(interp, objv[1], &i) != TCL_OK)  
          {  
          //We could not retrieve an integer from the passed argument.  
          //We can't form the successor of a non-integer.  
          //Error out.  
   
          //Create the return object.  
          rv = Tcl_NewStringObj("rngPwrResRndA: can't parse this argument as an integer: ", -1);  
   
          //Tack on the offensive argument.  
          problem_arg = Tcl_GetString(objv[1]);  
          Tcl_AppendToObj(rv, problem_arg, -1);  
   
          //Set the return value to be the error message.  
          Tcl_SetObjResult(interp, rv);  
   
          //Error return.  
          return(TCL_ERROR);  
          }  
   
       rv = Tcl_NewIntObj(PrRandARandSucc(i));  
       Tcl_SetObjResult(interp, rv);  
       return(TCL_OK);  
       }  
    else //Wrong number of args.  
       {  
            Tcl_WrongNumArgs(interp,  
                        1,  
                        objv,  
                        "?N?");  
       return(TCL_ERROR);  
       }  
    }  
   
   
 //Performs initial registration to the hash table.  
 //  
 DECMOD_PR_RANDA void PrRandAInit(Tcl_Interp *interp)  
    {  
    Tcl_CreateObjCommand(interp,  
                              "rngPwrResRndA",  
                         (Tcl_ObjCmdProc *)PrRandA_rngPwrResRndA_cmd,  
                                                  NULL,  
                                                  NULL);  
    }  
   
   
 DECMOD_PR_RANDA const char *PrRandACversion(void)  
 {    
     return ("$Revision: 1.1.1.1 $ $Modtime: 1/01/01 11:49p $ $Author: dtashley $");  
 }  
   
   
 DECMOD_PR_RANDA const char *PrRandAHversion(void)  
 {    
     return (PR_RANDA_H_VERSION);  
 }  
   
   
 /* $History: pr_randa.c $  
  *  
  * *****************  Version 1  *****************  
  * User: Dtashley     Date: 1/01/01    Time: 11:50p  
  * Created in $/IjuScripter, IjuConsole/Source/Tcl-Tk Extensions  
  * Initial check-in.  
  */  
   
 /* End of PR_RANDA.C */  
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