/[dtapublic]/projs/emts/trunk/src/lib_c/c_datd/cvxzone.c
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to_be_filed/sf_code/esrgpcpj/shared/c_datd/cvxzone.c revision 29 by dashley, Sat Oct 8 07:08:47 2016 UTC projs/emts/trunk/src/lib_c/c_datd/cvxzone.c revision 269 by dashley, Sat Jun 1 21:29:58 2019 UTC
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1  /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/c_datd/cvxzone.c,v 1.3 2001/10/25 05:33:05 dtashley Exp $  //$Header$
2  **  //-------------------------------------------------------------------------------------------------
3  ** Convex zones for timed automata verification.  //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  //Copyright 2001 David T. Ashley  //reproduced below.
8  //-------------------------------------------------------------------------------------------------  //-------------------------------------------------------------------------------------------------
9  //This source code and any program in which it is compiled/used is provided under the GNU GENERAL  //Permission is hereby granted, free of charge, to any person obtaining a copy of
10  //PUBLIC LICENSE, Version 3, full license text below.  //this software and associated documentation files(the "Software"), to deal in the
11  //-------------------------------------------------------------------------------------------------  //Software without restriction, including without limitation the rights to use,
12  //                    GNU GENERAL PUBLIC LICENSE  //copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
13  //                       Version 3, 29 June 2007  //Software, and to permit persons to whom the Software is furnished to do so,
14  //  //subject to the following conditions :
15  // Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>  //
16  // Everyone is permitted to copy and distribute verbatim copies  //The above copyright notice and this permission notice shall be included in all
17  // of this license document, but changing it is not allowed.  //copies or substantial portions of the Software.
18  //  //
19  //                            Preamble  //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 GNU General Public License is a free, copyleft license for  //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
22  //software and other kinds of works.  //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  //  The licenses for most software and other practical works are designed  //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25  //to take away your freedom to share and change the works.  By contrast,  //SOFTWARE.
26  //the GNU General Public License is intended to guarantee your freedom to  //-------------------------------------------------------------------------------------------------
27  //share and change all versions of a program--to make sure it remains free  /* Convex zones for timed automata verification.
28  //software for all its users.  We, the Free Software Foundation, use the  */
29  //GNU General Public License for most of our software; it applies also to  //-------------------------------------------------------------------------------------------------
30  //any other work released this way by its authors.  You can apply it to  #define MODULE_CVXZONE
31  //your programs, too.  
32  //  #include <assert.h>
33  //  When we speak of free software, we are referring to freedom, not  #include <malloc.h>
34  //price.  Our General Public Licenses are designed to make sure that you  #include <stdio.h>
35  //have the freedom to distribute copies of free software (and charge for  #include <string.h>
36  //them if you wish), that you receive source code or can get it if you  
37  //want it, that you can change the software or use pieces of it in new  #include "ccmalloc.h"
38  //free programs, and that you know you can do these things.  #include "cvxzone.h"
39  //  
40  //  To protect your rights, we need to prevent others from denying you  
41  //these rights or asking you to surrender the rights.  Therefore, you have  /**************************************************************************/
42  //certain responsibilities if you distribute copies of the software, or if  /***** ALLOCATION, DEALLOCATION, AND COPY FUNCTIONS
43  //you modify it: responsibilities to respect the freedom of others.  /**************************************************************************/
44  //  /* Returns the number of constraint slots in memory that should be
45  //  For example, if you distribute copies of such a program, whether  ** allocated as a function of those required.
46  //gratis or for a fee, you must pass on to the recipients the same  */
47  //freedoms that you received.  You must make sure that they, too, receive  static int CVXZONE_cr_num_to_alloc(int crs_reqd_num)
48  //or can get the source code.  And you must show them these terms so they     {
49  //know their rights.     int rv;
50  //  
51  //  Developers that use the GNU GPL protect your rights with two steps:     assert(crs_reqd_num >= 0);
52  //(1) assert copyright on the software, and (2) offer you this License  
53  //giving you legal permission to copy, distribute and/or modify it.     rv = crs_reqd_num + CVXZONE_ZONE_CONST_ALLOC_INC - 1;
54  //  
55  //  For the developers' and authors' protection, the GPL clearly explains     rv = rv - (rv % CVXZONE_ZONE_CONST_ALLOC_INC);
56  //that there is no warranty for this free software.  For both users' and  
57  //authors' sake, the GPL requires that modified versions be marked as     assert(rv >= crs_reqd_num);
58  //changed, so that their problems will not be attributed erroneously to  
59  //authors of previous versions.     return(rv);
60  //     }
61  //  Some devices are designed to deny users access to install or run  
62  //modified versions of the software inside them, although the manufacturer  
63  //can do so.  This is fundamentally incompatible with the aim of  void CVXZONE_new(CVXZONE_zone_ptr *arg)
64  //protecting users' freedom to change the software.  The systematic     {
65  //pattern of such abuse occurs in the area of products for individuals to     /* Eyeball the inputs. */
66  //use, which is precisely where it is most unacceptable.  Therefore, we     assert(arg  != NULL);
67  //have designed this version of the GPL to prohibit the practice for those     assert(*arg == NULL);
68  //products.  If such problems arise substantially in other domains, we  
69  //stand ready to extend this provision to those domains in future versions     /* Allocate the space for the zone itself.
70  //of the GPL, as needed to protect the freedom of users.     */
71  //     *arg = CCMALLOC_malloc(sizeof(CVXZONE_zone));
72  //  Finally, every program is threatened constantly by software patents.  
73  //States should not allow patents to restrict development and use of     /* Zero the space. */
74  //software on general-purpose computers, but in those that do, we wish to     memset(*arg, 0, sizeof(CVXZONE_zone));
75  //avoid the special danger that patents applied to a free program could  
76  //make it effectively proprietary.  To prevent this, the GPL assures that     /* Set any fields that take on non-zero initial values.
77  //patents cannot be used to render the program non-free.     */
78  //     (*arg)->is_canonical = 1;
79  //  The precise terms and conditions for copying, distribution and     }
80  //modification follow.  
81  //  
82  //                       TERMS AND CONDITIONS  void CVXZONE_delete(CVXZONE_zone_ptr *arg)
83  //     {
84  //  0. Definitions.     /* Check the input parameters. */
85  //     assert(arg  != NULL);
86  //  "This License" refers to version 3 of the GNU General Public License.     assert(*arg != NULL);
87  //  
88  //  "Copyright" also means copyright-like laws that apply to other kinds of     /* Free any allocated constraint block.
89  //works, such as semiconductor masks.     */
90  //     if ((*arg)->constraints)
91  //  "The Program" refers to any copyrightable work licensed under this        CCMALLOC_free((*arg)->constraints);
92  //License.  Each licensee is addressed as "you".  "Licensees" and  
93  //"recipients" may be individuals or organizations.     /* Free the record itself.
94  //     */
95  //  To "modify" a work means to copy from or adapt all or part of the work     CCMALLOC_free(*arg);
96  //in a fashion requiring copyright permission, other than the making of an  
97  //exact copy.  The resulting work is called a "modified version" of the     /* Set the caller's pointer to NULL.
98  //earlier work or a work "based on" the earlier work.     */
99  //     *arg = NULL;
100  //  A "covered work" means either the unmodified Program or a work based     }
101  //on the Program.  
102  //  
103  //  To "propagate" a work means to do anything with it that, without  void CVXZONE_copy(CVXZONE_zone_ptr *dst, CVXZONE_zone_ptr *src)
104  //permission, would make you directly or secondarily liable for     {
105  //infringement under applicable copyright law, except executing it on a     CVXZONE_constraint_ptr constraints;
106  //computer or modifying a private copy.  Propagation includes copying,     int n_allocd;
107  //distribution (with or without modification), making available to the  
108  //public, and in some countries other activities as well.     /* Check the input parameters. */
109  //     assert(dst  != NULL);
110  //  To "convey" a work means any kind of propagation that enables other     assert(src  != NULL);
111  //parties to make or receive copies.  Mere interaction with a user through     assert(*dst != NULL);
112  //a computer network, with no transfer of a copy, is not conveying.     assert(*src != NULL);
113  //  
114  //  An interactive user interface displays "Appropriate Legal Notices"     /* Save the victim's pointer to constraints and also the amount of
115  //to the extent that it includes a convenient and prominently visible     ** space allocated.  These will be written over by the memory
116  //feature that (1) displays an appropriate copyright notice, and (2)     ** copy.
117  //tells the user that there is no warranty for the work (except to the     */
118  //extent that warranties are provided), that licensees may convey the     constraints = (*dst)->constraints;
119  //work under this License, and how to view a copy of this License.  If     n_allocd    = (*dst)->n_allocd;
120  //the interface presents a list of user commands or options, such as a  
121  //menu, a prominent item in the list meets this criterion.     /* Do a block copy from source to destination.  This catches
122  //     ** everything except the constraints.
123  //  1. Source Code.     */
124  //     memcpy(*dst, *src, sizeof(CVXZONE_zone));
125  //  The "source code" for a work means the preferred form of the work  
126  //for making modifications to it.  "Object code" means any non-source     /* Write the memory pointer and the amount allocd back.
127  //form of a work.     */
128  //     (*dst)->constraints = constraints;
129  //  A "Standard Interface" means an interface that either is an official     (*dst)->n_allocd    = n_allocd;
130  //standard defined by a recognized standards body, or, in the case of  
131  //interfaces specified for a particular programming language, one that     /* Reallocate the destination constraint block if there is not
132  //is widely used among developers working in that language.     ** enough space to hold the constraints.
133  //     */
134  //  The "System Libraries" of an executable work include anything, other     if ((*dst)->n_used > (*dst)->n_allocd)
135  //than the work as a whole, that (a) is included in the normal form of        {
136  //packaging a Major Component, but which is not part of that Major        if ((*dst)->constraints)
137  //Component, and (b) serves only to enable use of the work with that           {
138  //Major Component, or to implement a Standard Interface for which an           /* There was already a memory area involved, but not large
139  //implementation is available to the public in source code form.  A           ** enough.
140  //"Major Component", in this context, means a major essential component           */
141  //(kernel, window system, and so on) of the specific operating system           CCMALLOC_realloc((*dst)->constraints, CVXZONE_cr_num_to_alloc((*dst)->n_used) * sizeof(CVXZONE_constraint));
142  //(if any) on which the executable work runs, or a compiler used to           }
143  //produce the work, or an object code interpreter used to run it.        else
144  //           {
145  //  The "Corresponding Source" for a work in object code form means all           /* No memory area had been allocated.  Need to allocate it for
146  //the source code needed to generate, install, and (for an executable           ** the first time.
147  //work) run the object code and to modify the work, including scripts to           */
148  //control those activities.  However, it does not include the work's           CCMALLOC_malloc(CVXZONE_cr_num_to_alloc((*dst)->n_used) * sizeof(CVXZONE_constraint));
149  //System Libraries, or general-purpose tools or generally available free           }
150  //programs which are used unmodified in performing those activities but        }
151  //which are not part of the work.  For example, Corresponding Source  
152  //includes interface definition files associated with source files for     /* Copy over the constraint block.
153  //the work, and the source code for shared libraries and dynamically     */
154  //linked subprograms that the work is specifically designed to require,     if ((*dst)->n_used)
155  //such as by intimate data communication or control flow between those        {
156  //subprograms and other parts of the work.        memcpy((*dst)->constraints, (*src)->constraints, (*dst)->n_used * sizeof(CVXZONE_constraint));
157  //        }
158  //  The Corresponding Source need not include anything that users     }
159  //can regenerate automatically from other parts of the Corresponding  
160  //Source.  
161  //  void CVXZONE_clone(CVXZONE_zone_ptr *clone, CVXZONE_zone_ptr *orig)
162  //  The Corresponding Source for a work in source code form is that     {
163  //same work.     /* Check the inputs. */
164  //     assert(clone  != NULL);
165  //  2. Basic Permissions.     assert(orig   != NULL);
166  //     assert(*clone == NULL);
167  //  All rights granted under this License are granted for the term of     assert(*orig  != NULL);
168  //copyright on the Program, and are irrevocable provided the stated  
169  //conditions are met.  This License explicitly affirms your unlimited     /* Allocate the clone.
170  //permission to run the unmodified Program.  The output from running a     */
171  //covered work is covered by this License only if the output, given its     CVXZONE_new(clone);
172  //content, constitutes a covered work.  This License acknowledges your  
173  //rights of fair use or other equivalent, as provided by copyright law.     /* Copy to the clone.
174  //     */
175  //  You may make, run and propagate covered works that you do not     CVXZONE_copy(clone, orig);
176  //convey, without conditions so long as your license otherwise remains     }
177  //in force.  You may convey covered works to others for the sole purpose  
178  //of having them make modifications exclusively for you, or provide you  
179  //with facilities for running those works, provided that you comply with  /**************************************************************************/
180  //the terms of this License in conveying all material for which you do  /***** MAINTENANCE FUNCTIONS                        
181  //not control copyright.  Those thus making or running the covered works  /**************************************************************************/
182  //for you must do so exclusively on your behalf, under your direction  /* Removes (i.e. compresses out) all the unused constraints, i.e. those with
183  //and control, on terms that prohibit them from making any copies of  ** the valid flag not set.  This simply makes the existing constraints contiguous.
184  //your copyrighted material outside their relationship with you.  ** This function does this unconditionally, i.e. the is_canonical flag is not
185  //  ** considered.
186  //  Conveying under any other circumstances is permitted solely under  */
187  //the conditions stated below.  Sublicensing is not allowed; section 10  static void CVXZONE_compress_constraints(CVXZONE_zone_ptr *arg)
188  //makes it unnecessary.     {
189  //     int src_idx, dst_idx;
190  //  3. Protecting Users' Legal Rights From Anti-Circumvention Law.  
191  //     assert(arg  != NULL);
192  //  No covered work shall be deemed part of an effective technological     assert(*arg != NULL);
193  //measure under any applicable law fulfilling obligations under article  
194  //11 of the WIPO copyright treaty adopted on 20 December 1996, or     dst_idx = 0;
195  //similar laws prohibiting or restricting circumvention of such  
196  //measures.     for (src_idx = 0; src_idx < (int)((*arg)->n_used); src_idx++)
197  //        {
198  //  When you convey a covered work, you waive any legal power to forbid        if ((*arg)->constraints[src_idx].valid)
199  //circumvention of technological measures to the extent such circumvention           {
200  //is effected by exercising rights under this License with respect to           if (src_idx != dst_idx)  /* No sense copying something onto itself. */
201  //the covered work, and you disclaim any intention to limit operation or              {
202  //modification of the work as a means of enforcing, against the work's              memcpy((*arg)->constraints + dst_idx,
203  //users, your or third parties' legal rights to forbid circumvention of                     (*arg)->constraints + src_idx,
204  //technological measures.                     sizeof(CVXZONE_constraint));
205  //              }
206  //  4. Conveying Verbatim Copies.           dst_idx++;
207  //           }
208  //  You may convey verbatim copies of the Program's source code as you        }
209  //receive it, in any medium, provided that you conspicuously and  
210  //appropriately publish on each copy an appropriate copyright notice;     /* The copy cycle is complete.  We can infer how many slots were *actually* used.
211  //keep intact all notices stating that this License and any     */
212  //non-permissive terms added in accord with section 7 apply to the code;     (*arg)->n_used = dst_idx;
213  //keep intact all notices of the absence of any warranty; and give all     }
214  //recipients a copy of this License along with the Program.  
215  //  
216  //  You may charge any price or no price for each copy that you convey,  void CVXZONE_maintain_memory_trim(CVXZONE_zone_ptr *arg)
217  //and you may offer support or warranty protection for a fee.     {
218  //     assert(arg  != NULL);
219  //  5. Conveying Modified Source Versions.     assert(*arg != NULL);
220  //  
221  //  You may convey a work based on the Program, or the modifications to     /* First, compact the array of constraints.
222  //produce it from the Program, in the form of source code under the     */
223  //terms of section 4, provided that you also meet all of these conditions:     CVXZONE_compress_constraints(arg);
224  //  
225  //    a) The work must carry prominent notices stating that you modified     /* Now, realloc the array to be the exact right size.
226  //    it, and giving a relevant date.     */
227  //     if ((*arg)->n_used)
228  //    b) The work must carry prominent notices stating that it is        {
229  //    released under this License and any conditions added under section        assert((*arg)->constraints != NULL);
230  //    7.  This requirement modifies the requirement in section 4 to  
231  //    "keep intact all notices".        CCMALLOC_realloc((*arg)->constraints,
232  //                         (*arg)->n_used * sizeof(CVXZONE_constraint));
233  //    c) You must license the entire work, as a whole, under this        }
234  //    License to anyone who comes into possession of a copy.  This     else
235  //    License will therefore apply, along with any applicable section 7        {
236  //    additional terms, to the whole of the work, and all its parts,        if ((*arg)->constraints)
237  //    regardless of how they are packaged.  This License gives no           {
238  //    permission to license the work in any other way, but it does not           CCMALLOC_free((*arg)->constraints);
239  //    invalidate such permission if you have separately received it.           (*arg)->constraints = NULL;
240  //           }
241  //    d) If the work has interactive user interfaces, each must display        }
242  //    Appropriate Legal Notices; however, if the Program has interactive     }
243  //    interfaces that do not display Appropriate Legal Notices, your  
244  //    work need not make them do so.  
245  //  DECMOD_CVXZONE void CVXZONE_maintain_canonize(CVXZONE_zone_ptr *arg)
246  //  A compilation of a covered work with other separate and independent     {
247  //works, which are not by their nature extensions of the covered work,     assert(arg  != NULL);
248  //and which are not combined with it such as to form a larger program,     assert(*arg != NULL);
249  //in or on a volume of a storage or distribution medium, is called an  
250  //"aggregate" if the compilation and its resulting copyright are not  
251  //used to limit the access or legal rights of the compilation's users     }
252  //beyond what the individual works permit.  Inclusion of a covered work  
253  //in an aggregate does not cause this License to apply to the other  //End of cvxzone.c.
 //parts of the aggregate.  
 //  
 //  6. Conveying Non-Source Forms.  
 //  
 //  You may convey a covered work in object code form under the terms  
 //of sections 4 and 5, provided that you also convey the  
 //machine-readable Corresponding Source under the terms of this License,  
 //in one of these ways:  
 //  
 //    a) Convey the object code in, or embodied in, a physical product  
 //    (including a physical distribution medium), accompanied by the  
 //    Corresponding Source fixed on a durable physical medium  
 //    customarily used for software interchange.  
 //  
 //    b) Convey the object code in, or embodied in, a physical product  
 //    (including a physical distribution medium), accompanied by a  
 //    written offer, valid for at least three years and valid for as  
 //    long as you offer spare parts or customer support for that product  
 //    model, to give anyone who possesses the object code either (1) a  
 //    copy of the Corresponding Source for all the software in the  
 //    product that is covered by this License, on a durable physical  
 //    medium customarily used for software interchange, for a price no  
 //    more than your reasonable cost of physically performing this  
 //    conveying of source, or (2) access to copy the  
 //    Corresponding Source from a network server at no charge.  
 //  
 //    c) Convey individual copies of the object code with a copy of the  
 //    written offer to provide the Corresponding Source.  This  
 //    alternative is allowed only occasionally and noncommercially, and  
 //    only if you received the object code with such an offer, in accord  
 //    with subsection 6b.  
 //  
 //    d) Convey the object code by offering access from a designated  
 //    place (gratis or for a charge), and offer equivalent access to the  
 //    Corresponding Source in the same way through the same place at no  
 //    further charge.  You need not require recipients to copy the  
 //    Corresponding Source along with the object code.  If the place to  
 //    copy the object code is a network server, the Corresponding Source  
 //    may be on a different server (operated by you or a third party)  
 //    that supports equivalent copying facilities, provided you maintain  
 //    clear directions next to the object code saying where to find the  
 //    Corresponding Source.  Regardless of what server hosts the  
 //    Corresponding Source, you remain obligated to ensure that it is  
 //    available for as long as needed to satisfy these requirements.  
 //  
 //    e) Convey the object code using peer-to-peer transmission, provided  
 //    you inform other peers where the object code and Corresponding  
 //    Source of the work are being offered to the general public at no  
 //    charge under subsection 6d.  
 //  
 //  A separable portion of the object code, whose source code is excluded  
 //from the Corresponding Source as a System Library, need not be  
 //included in conveying the object code work.  
 //  
 //  A "User Product" is either (1) a "consumer product", which means any  
 //tangible personal property which is normally used for personal, family,  
 //or household purposes, or (2) anything designed or sold for incorporation  
 //into a dwelling.  In determining whether a product is a consumer product,  
 //doubtful cases shall be resolved in favor of coverage.  For a particular  
 //product received by a particular user, "normally used" refers to a  
 //typical or common use of that class of product, regardless of the status  
 //of the particular user or of the way in which the particular user  
 //actually uses, or expects or is expected to use, the product.  A product  
 //is a consumer product regardless of whether the product has substantial  
 //commercial, industrial or non-consumer uses, unless such uses represent  
 //the only significant mode of use of the product.  
 //  
 //  "Installation Information" for a User Product means any methods,  
 //procedures, authorization keys, or other information required to install  
 //and execute modified versions of a covered work in that User Product from  
 //a modified version of its Corresponding Source.  The information must  
 //suffice to ensure that the continued functioning of the modified object  
 //code is in no case prevented or interfered with solely because  
 //modification has been made.  
 //  
 //  If you convey an object code work under this section in, or with, or  
 //specifically for use in, a User Product, and the conveying occurs as  
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 //-------------------------------------------------------------------------------------------------  
 //--------------------------------------------------------------------------------  
 #define MODULE_CVXZONE  
   
 #include <assert.h>  
 #include <malloc.h>  
 #include <stdio.h>  
 #include <string.h>  
   
 #include "ccmalloc.h"  
 #include "cvxzone.h"  
   
   
 /**************************************************************************/  
 /***** ALLOCATION, DEALLOCATION, AND COPY FUNCTIONS  
 /**************************************************************************/  
 /* Returns the number of constraint slots in memory that should be  
 ** allocated as a function of those required.  
 */  
 static int CVXZONE_cr_num_to_alloc(int crs_reqd_num)  
    {  
    int rv;  
   
    assert(crs_reqd_num >= 0);  
   
    rv = crs_reqd_num + CVXZONE_ZONE_CONST_ALLOC_INC - 1;  
   
    rv = rv - (rv % CVXZONE_ZONE_CONST_ALLOC_INC);  
   
    assert(rv >= crs_reqd_num);  
   
    return(rv);  
    }  
   
   
 void CVXZONE_new(CVXZONE_zone_ptr *arg)  
    {  
    /* Eyeball the inputs. */  
    assert(arg  != NULL);  
    assert(*arg == NULL);  
   
    /* Allocate the space for the zone itself.  
    */  
    *arg = CCMALLOC_malloc(sizeof(CVXZONE_zone));  
   
    /* Zero the space. */  
    memset(*arg, 0, sizeof(CVXZONE_zone));  
   
    /* Set any fields that take on non-zero initial values.  
    */  
    (*arg)->is_canonical = 1;  
    }  
   
   
 void CVXZONE_delete(CVXZONE_zone_ptr *arg)  
    {  
    /* Check the input parameters. */  
    assert(arg  != NULL);  
    assert(*arg != NULL);  
   
    /* Free any allocated constraint block.  
    */  
    if ((*arg)->constraints)  
       CCMALLOC_free((*arg)->constraints);  
   
    /* Free the record itself.  
    */  
    CCMALLOC_free(*arg);  
   
    /* Set the caller's pointer to NULL.  
    */  
    *arg = NULL;  
    }  
   
   
 void CVXZONE_copy(CVXZONE_zone_ptr *dst, CVXZONE_zone_ptr *src)  
    {  
    CVXZONE_constraint_ptr constraints;  
    int n_allocd;  
   
    /* Check the input parameters. */  
    assert(dst  != NULL);  
    assert(src  != NULL);  
    assert(*dst != NULL);  
    assert(*src != NULL);  
   
    /* Save the victim's pointer to constraints and also the amount of  
    ** space allocated.  These will be written over by the memory  
    ** copy.  
    */  
    constraints = (*dst)->constraints;  
    n_allocd    = (*dst)->n_allocd;  
   
    /* Do a block copy from source to destination.  This catches  
    ** everything except the constraints.  
    */  
    memcpy(*dst, *src, sizeof(CVXZONE_zone));  
   
    /* Write the memory pointer and the amount allocd back.  
    */  
    (*dst)->constraints = constraints;  
    (*dst)->n_allocd    = n_allocd;  
   
    /* Reallocate the destination constraint block if there is not  
    ** enough space to hold the constraints.  
    */  
    if ((*dst)->n_used > (*dst)->n_allocd)  
       {  
       if ((*dst)->constraints)  
          {  
          /* There was already a memory area involved, but not large  
          ** enough.  
          */  
          CCMALLOC_realloc((*dst)->constraints, CVXZONE_cr_num_to_alloc((*dst)->n_used) * sizeof(CVXZONE_constraint));  
          }  
       else  
          {  
          /* No memory area had been allocated.  Need to allocate it for  
          ** the first time.  
          */  
          CCMALLOC_malloc(CVXZONE_cr_num_to_alloc((*dst)->n_used) * sizeof(CVXZONE_constraint));  
          }  
       }  
   
    /* Copy over the constraint block.  
    */  
    if ((*dst)->n_used)  
       {  
       memcpy((*dst)->constraints, (*src)->constraints, (*dst)->n_used * sizeof(CVXZONE_constraint));  
       }  
    }  
   
   
 void CVXZONE_clone(CVXZONE_zone_ptr *clone, CVXZONE_zone_ptr *orig)  
    {  
    /* Check the inputs. */  
    assert(clone  != NULL);  
    assert(orig   != NULL);  
    assert(*clone == NULL);  
    assert(*orig  != NULL);  
   
    /* Allocate the clone.  
    */  
    CVXZONE_new(clone);  
   
    /* Copy to the clone.  
    */  
    CVXZONE_copy(clone, orig);  
    }  
   
   
 /**************************************************************************/  
 /***** MAINTENANCE FUNCTIONS                          
 /**************************************************************************/  
 /* Removes (i.e. compresses out) all the unused constraints, i.e. those with  
 ** the valid flag not set.  This simply makes the existing constraints contiguous.  
 ** This function does this unconditionally, i.e. the is_canonical flag is not  
 ** considered.  
 */  
 static void CVXZONE_compress_constraints(CVXZONE_zone_ptr *arg)  
    {  
    int src_idx, dst_idx;  
   
    assert(arg  != NULL);  
    assert(*arg != NULL);  
   
    dst_idx = 0;  
   
    for (src_idx = 0; src_idx < (int)((*arg)->n_used); src_idx++)  
       {  
       if ((*arg)->constraints[src_idx].valid)  
          {  
          if (src_idx != dst_idx)  /* No sense copying something onto itself. */  
             {  
             memcpy((*arg)->constraints + dst_idx,  
                    (*arg)->constraints + src_idx,  
                    sizeof(CVXZONE_constraint));  
             }  
          dst_idx++;  
          }  
       }  
   
    /* The copy cycle is complete.  We can infer how many slots were *actually* used.  
    */  
    (*arg)->n_used = dst_idx;  
    }  
   
   
 void CVXZONE_maintain_memory_trim(CVXZONE_zone_ptr *arg)  
    {  
    assert(arg  != NULL);  
    assert(*arg != NULL);  
   
    /* First, compact the array of constraints.  
    */  
    CVXZONE_compress_constraints(arg);  
   
    /* Now, realloc the array to be the exact right size.  
    */  
    if ((*arg)->n_used)  
       {  
       assert((*arg)->constraints != NULL);  
   
       CCMALLOC_realloc((*arg)->constraints,  
                        (*arg)->n_used * sizeof(CVXZONE_constraint));  
       }  
    else  
       {  
       if ((*arg)->constraints)  
          {  
          CCMALLOC_free((*arg)->constraints);  
          (*arg)->constraints = NULL;  
          }  
       }  
    }  
   
   
 DECMOD_CVXZONE void CVXZONE_maintain_canonize(CVXZONE_zone_ptr *arg)  
    {  
    assert(arg  != NULL);  
    assert(*arg != NULL);  
   
   
    }  
   
   
 /******************************************************************************  
 ** $Log: cvxzone.c,v $  
 ** Revision 1.3  2001/10/25 05:33:05  dtashley  
 ** Evening safety checkin after edits.  
 **  
 ** Revision 1.2  2001/10/18 20:39:25  dtashley  
 ** Substantial edits.  
 **  
 ** Revision 1.1  2001/10/18 17:19:03  dtashley  
 ** Initial checkin.  
 *******************************************************************************  
 ** End of CVXZONE.C. */  
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