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lpsolve.c
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lpsolve.c
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/*
Author: Peter Notebaert
Contact: [email protected]
License terms: LGPL.
Release notes:
interface to the lp_solve 5.5 toolkit.
This file and the MATLAB interface code is originally developed by
Jeffrey C. Kantor ([email protected], [email protected])
for lp_solve version 2.3
The original name was lpmex.c
It is completely revised and redesigned by Peter Notebaert for lp_solve version 5.5
lpsolve.c needs to be linked with hash.c and the lp_solve library.
The hash function is needed to have a quick access from the provided functionname to the
implementation of the function.
Change history:
v5.1.0.0
- First implementation
v5.5.0.1 12 nov 2005
- set_outputfile(lp0, ""); added to disable messages on console
- For routines that return an integer,
CreateDoubleMatrix and SetDoubleMatrix replaced by CreateLongMatrix and SetLongMatrix
v5.5.0.2 19 nov 2005
- For routines that need an lp handle, this handle can now also be the model name.
- New call get_handle to get handle from model name.
v5.5.0.4 25 aug 2006
- New routine guess_basis added.
v5.5.0.5 31 okt 2006
- Fixed a bug in hash routines which could result in a severe error with
model names instead of handles
v5.5.0.6 14 okt 2008
- Revised for PHP
- Removed static variables for multithreading.
v5.5.0.7 4 may 2009
- Sometimes a memory leak could occur. Fixed.
- Added the possibility to call a check routine in the abort callback routine.
- Added the possibility to enable fortify (just add -DFORTIFY at compile command line)
v5.5.0.8 26 jul 2009
- Constants can now also be provided as string. For example 'LE'
- Returned constants can be returned as string by calling return_constants with a non-zero parameter
When return_constants is called without a parameter, it only returns the current setting
*/
#include <stdio.h>
#include <signal.h>
#include <string.h>
#define SRCLPSOLVE
#include "lpsolvecaller.h"
#define NEWLINE "\n"
/* Declare a global lp record */
#define LPSTEP 100
static lprec **lp;
static hashtable *cmdhash, *constanthash, *handlehash;
static int lp_last;
static short initialized = FALSE;
static short interrupted = FALSE;
static char return_constants = FALSE; /* return constants as string N/Y */
#define bufsz 200
enum consttypes { /* must be a power of 2 */
consttype_constrainttype = 1,
consttype_antidegen = 2,
consttype_branch = 4,
consttype_crash = 8,
consttype_verbose = 16,
consttype_solve = 32,
consttype_improve = 64,
consttype_msg = 128,
consttype_node = 256,
consttype_presolve = 512,
consttype_pricer = 1024,
consttype_price = 2048,
consttype_scale = 4096,
consttype_simplex = 8192,
consttype_eps = 16384,
consttype_MPS = 32768,
};
static struct {
char *svalue;
int value;
unsigned int consttype; /* one of the consttypes enums. It can be an or of multiple of them */
unsigned int mask; /* if 0, then value is a bit mask. Else value is a value when masked with this value */
unsigned char usereturn; /* use this constant as return value. If not then it is only used as input constant */
} constants[] = {
{ "<", LE, consttype_constrainttype, ~0, FALSE },
{ "<=", LE, consttype_constrainttype, ~0, FALSE },
{ ">", GE, consttype_constrainttype, ~0, FALSE },
{ ">=", GE, consttype_constrainttype, ~0, FALSE },
{ "=", EQ, consttype_constrainttype, ~0, FALSE },
{ "FR", FR, consttype_constrainttype, ~0, TRUE },
{ "LE", LE, consttype_constrainttype, ~0, TRUE },
{ "GE", GE, consttype_constrainttype, ~0, TRUE },
{ "EQ", EQ, consttype_constrainttype, ~0, TRUE },
{ "NEUTRAL", NEUTRAL, consttype_verbose, 0x07, TRUE },
{ "CRITICAL", CRITICAL, consttype_verbose, 0x07, TRUE },
{ "SEVERE", SEVERE, consttype_verbose, 0x07, TRUE },
{ "IMPORTANT", IMPORTANT, consttype_verbose, 0x07, TRUE },
{ "NORMAL", NORMAL, consttype_verbose, 0x07, TRUE },
{ "DETAILED", DETAILED, consttype_verbose, 0x07, TRUE },
{ "FULL", FULL, consttype_verbose, 0x07, TRUE },
{ "NOMEMORY", NOMEMORY, consttype_solve, ~0, TRUE },
{ "OPTIMAL", OPTIMAL, consttype_solve, ~0, TRUE },
{ "SUBOPTIMAL", SUBOPTIMAL, consttype_solve, ~0, TRUE },
{ "INFEASIBLE", INFEASIBLE, consttype_solve, ~0, TRUE },
{ "UNBOUNDED", UNBOUNDED, consttype_solve, ~0, TRUE },
{ "DEGENERATE", DEGENERATE, consttype_solve, ~0, TRUE },
{ "NUMFAILURE", NUMFAILURE, consttype_solve, ~0, TRUE },
{ "USERABORT", USERABORT, consttype_solve, ~0, TRUE },
{ "TIMEOUT", TIMEOUT, consttype_solve, ~0, TRUE },
{ "PRESOLVED", PRESOLVED, consttype_solve, ~0, TRUE },
{ "PROCFAIL", PROCFAIL, consttype_solve, ~0, TRUE },
{ "PROCBREAK", PROCBREAK, consttype_solve, ~0, TRUE },
{ "FEASFOUND", FEASFOUND, consttype_solve, ~0, TRUE },
{ "NOFEASFOUND", NOFEASFOUND, consttype_solve, ~0, TRUE },
{ "ANTIDEGEN_NONE", ANTIDEGEN_NONE, consttype_antidegen, ~0, TRUE },
{ "ANTIDEGEN_FIXEDVARS", ANTIDEGEN_FIXEDVARS, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_COLUMNCHECK", ANTIDEGEN_COLUMNCHECK, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_STALLING", ANTIDEGEN_STALLING, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_NUMFAILURE", ANTIDEGEN_NUMFAILURE, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_LOSTFEAS", ANTIDEGEN_LOSTFEAS, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_INFEASIBLE", ANTIDEGEN_INFEASIBLE, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_DYNAMIC", ANTIDEGEN_DYNAMIC, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_DURINGBB", ANTIDEGEN_DURINGBB, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_RHSPERTURB", ANTIDEGEN_RHSPERTURB, consttype_antidegen, 0, TRUE },
{ "ANTIDEGEN_BOUNDFLIP", ANTIDEGEN_BOUNDFLIP, consttype_antidegen, 0, TRUE },
{ "BRANCH_CEILING", BRANCH_CEILING, consttype_branch, ~0, TRUE },
{ "BRANCH_FLOOR", BRANCH_FLOOR, consttype_branch, ~0, TRUE },
{ "BRANCH_AUTOMATIC", BRANCH_AUTOMATIC, consttype_branch, ~0, TRUE },
{ "BRANCH_DEFAULT", BRANCH_DEFAULT, consttype_branch, ~0, TRUE },
{ "CRASH_NONE", CRASH_NONE, consttype_crash, ~0, TRUE },
{ "CRASH_MOSTFEASIBLE", CRASH_MOSTFEASIBLE, consttype_crash, ~0, TRUE },
{ "CRASH_LEASTDEGENERATE", CRASH_LEASTDEGENERATE, consttype_crash, ~0, TRUE },
{ "IMPROVE_NONE", IMPROVE_NONE, consttype_improve, ~0, TRUE },
{ "IMPROVE_SOLUTION", IMPROVE_SOLUTION, consttype_improve, 0, TRUE },
{ "IMPROVE_DUALFEAS", IMPROVE_DUALFEAS, consttype_improve, 0, TRUE },
{ "IMPROVE_THETAGAP", IMPROVE_THETAGAP, consttype_improve, 0, TRUE },
{ "IMPROVE_BBSIMPLEX", IMPROVE_BBSIMPLEX, consttype_improve, 0, TRUE },
{ "MSG_PRESOLVE", MSG_PRESOLVE, consttype_msg, 0, TRUE },
{ "MSG_LPFEASIBLE", MSG_LPFEASIBLE, consttype_msg, 0, TRUE },
{ "MSG_LPOPTIMAL", MSG_LPOPTIMAL, consttype_msg, 0, TRUE },
{ "MSG_MILPFEASIBLE", MSG_MILPFEASIBLE, consttype_msg, 0, TRUE },
{ "MSG_MILPEQUAL", MSG_MILPEQUAL, consttype_msg, 0, TRUE },
{ "MSG_MILPBETTER", MSG_MILPBETTER, consttype_msg, 0, TRUE },
{ "NODE_FIRSTSELECT", NODE_FIRSTSELECT, consttype_node, 0x07, TRUE },
{ "NODE_GAPSELECT", NODE_GAPSELECT, consttype_node, 0x07, TRUE },
{ "NODE_RANGESELECT", NODE_RANGESELECT, consttype_node, 0x07, TRUE },
{ "NODE_FRACTIONSELECT", NODE_FRACTIONSELECT, consttype_node, 0x07, TRUE },
{ "NODE_PSEUDOCOSTSELECT", NODE_PSEUDOCOSTSELECT, consttype_node, 0x07, TRUE },
{ "NODE_PSEUDONONINTSELECT", NODE_PSEUDONONINTSELECT, consttype_node, 0x07, TRUE },
{ "NODE_PSEUDORATIOSELECT", NODE_PSEUDORATIOSELECT, consttype_node, 0x07, TRUE },
{ "NODE_USERSELECT", NODE_USERSELECT, consttype_node, 0x07, TRUE },
{ "NODE_WEIGHTREVERSEMODE", NODE_WEIGHTREVERSEMODE, consttype_node, 0, TRUE },
{ "NODE_BRANCHREVERSEMODE", NODE_BRANCHREVERSEMODE, consttype_node, 0, TRUE },
{ "NODE_GREEDYMODE", NODE_GREEDYMODE, consttype_node, 0, TRUE },
{ "NODE_PSEUDOCOSTMODE", NODE_PSEUDOCOSTMODE, consttype_node, 0, TRUE },
{ "NODE_DEPTHFIRSTMODE", NODE_DEPTHFIRSTMODE, consttype_node, 0, TRUE },
{ "NODE_RANDOMIZEMODE", NODE_RANDOMIZEMODE, consttype_node, 0, TRUE },
{ "NODE_GUBMODE", NODE_GUBMODE, consttype_node, 0, TRUE },
{ "NODE_DYNAMICMODE", NODE_DYNAMICMODE, consttype_node, 0, TRUE },
{ "NODE_RESTARTMODE", NODE_RESTARTMODE, consttype_node, 0, TRUE },
{ "NODE_BREADTHFIRSTMODE", NODE_BREADTHFIRSTMODE, consttype_node, 0, TRUE },
{ "NODE_AUTOORDER", NODE_AUTOORDER, consttype_node, 0, TRUE },
{ "NODE_RCOSTFIXING", NODE_RCOSTFIXING, consttype_node, 0, TRUE },
{ "NODE_STRONGINIT", NODE_STRONGINIT, consttype_node, 0, TRUE },
{ "PRESOLVE_NONE", PRESOLVE_NONE, consttype_presolve, ~0, TRUE },
{ "PRESOLVE_ROWS", PRESOLVE_ROWS, consttype_presolve, 0, TRUE },
{ "PRESOLVE_COLS", PRESOLVE_COLS, consttype_presolve, 0, TRUE },
{ "PRESOLVE_LINDEP", PRESOLVE_LINDEP, consttype_presolve, 0, TRUE },
{ "PRESOLVE_SOS", PRESOLVE_SOS, consttype_presolve, 0, TRUE },
{ "PRESOLVE_REDUCEMIP", PRESOLVE_REDUCEMIP, consttype_presolve, 0, TRUE },
{ "PRESOLVE_KNAPSACK", PRESOLVE_KNAPSACK, consttype_presolve, 0, TRUE },
{ "PRESOLVE_ELIMEQ2", PRESOLVE_ELIMEQ2, consttype_presolve, 0, TRUE },
{ "PRESOLVE_IMPLIEDFREE", PRESOLVE_IMPLIEDFREE, consttype_presolve, 0, TRUE },
{ "PRESOLVE_REDUCEGCD", PRESOLVE_REDUCEGCD, consttype_presolve, 0, TRUE },
{ "PRESOLVE_PROBEFIX", PRESOLVE_PROBEFIX, consttype_presolve, 0, TRUE },
{ "PRESOLVE_PROBEREDUCE", PRESOLVE_PROBEREDUCE, consttype_presolve, 0, TRUE },
{ "PRESOLVE_ROWDOMINATE", PRESOLVE_ROWDOMINATE, consttype_presolve, 0, TRUE },
{ "PRESOLVE_COLDOMINATE", PRESOLVE_COLDOMINATE, consttype_presolve, 0, TRUE },
{ "PRESOLVE_MERGEROWS", PRESOLVE_MERGEROWS, consttype_presolve, 0, TRUE },
{ "PRESOLVE_IMPLIEDSLK", PRESOLVE_IMPLIEDSLK, consttype_presolve, 0, TRUE },
{ "PRESOLVE_COLFIXDUAL", PRESOLVE_COLFIXDUAL, consttype_presolve, 0, TRUE },
{ "PRESOLVE_BOUNDS", PRESOLVE_BOUNDS, consttype_presolve, 0, TRUE },
{ "PRESOLVE_DUALS", PRESOLVE_DUALS, consttype_presolve, 0, TRUE },
{ "PRESOLVE_SENSDUALS", PRESOLVE_SENSDUALS, consttype_presolve, 0, TRUE },
{ "PRICER_FIRSTINDEX", PRICER_FIRSTINDEX, consttype_pricer, 0x03, TRUE },
{ "PRICER_DANTZIG", PRICER_DANTZIG, consttype_pricer, 0x03, TRUE },
{ "PRICER_DEVEX", PRICER_DEVEX, consttype_pricer, 0x03, TRUE },
{ "PRICER_STEEPESTEDGE", PRICER_STEEPESTEDGE, consttype_pricer, 0x03, TRUE },
{ "PRICE_PRIMALFALLBACK", PRICE_PRIMALFALLBACK, consttype_price, 0, TRUE },
{ "PRICE_MULTIPLE", PRICE_MULTIPLE, consttype_price, 0, TRUE },
{ "PRICE_PARTIAL", PRICE_PARTIAL, consttype_price, 0, TRUE },
{ "PRICE_ADAPTIVE", PRICE_ADAPTIVE, consttype_price, 0, TRUE },
{ "PRICE_RANDOMIZE", PRICE_RANDOMIZE, consttype_price, 0, TRUE },
{ "PRICE_AUTOPARTIAL", PRICE_AUTOPARTIAL, consttype_price, 0, TRUE },
{ "PRICE_LOOPLEFT", PRICE_LOOPLEFT, consttype_price, 0, TRUE },
{ "PRICE_LOOPALTERNATE", PRICE_LOOPALTERNATE, consttype_price, 0, TRUE },
{ "PRICE_HARRISTWOPASS", PRICE_HARRISTWOPASS, consttype_price, 0, TRUE },
{ "PRICE_TRUENORMINIT", PRICE_TRUENORMINIT, consttype_price, 0, TRUE },
{ "SCALE_NONE", SCALE_NONE, consttype_scale, 0x07, TRUE },
{ "SCALE_EXTREME", SCALE_EXTREME, consttype_scale, 0x07, TRUE },
{ "SCALE_RANGE", SCALE_RANGE, consttype_scale, 0x07, TRUE },
{ "SCALE_MEAN", SCALE_MEAN, consttype_scale, 0x07, TRUE },
{ "SCALE_GEOMETRIC", SCALE_GEOMETRIC, consttype_scale, 0x07, TRUE },
{ "SCALE_CURTISREID", SCALE_CURTISREID, consttype_scale, 0x07, TRUE },
{ "SCALE_QUADRATIC", SCALE_QUADRATIC, consttype_scale, 0, TRUE },
{ "SCALE_LOGARITHMIC", SCALE_LOGARITHMIC, consttype_scale, 0, TRUE },
{ "SCALE_USERWEIGHT", SCALE_USERWEIGHT, consttype_scale, 0, TRUE },
{ "SCALE_POWER2", SCALE_POWER2, consttype_scale, 0, TRUE },
{ "SCALE_EQUILIBRATE", SCALE_EQUILIBRATE, consttype_scale, 0, TRUE },
{ "SCALE_INTEGERS", SCALE_INTEGERS, consttype_scale, 0, TRUE },
{ "SCALE_DYNUPDATE", SCALE_DYNUPDATE, consttype_scale, 0, TRUE },
{ "SCALE_ROWSONLY", SCALE_ROWSONLY, consttype_scale, 0, TRUE },
{ "SCALE_COLSONLY", SCALE_COLSONLY, consttype_scale, 0, TRUE },
{ "SIMPLEX_PRIMAL_PRIMAL", SIMPLEX_PRIMAL_PRIMAL, consttype_simplex, ~0, TRUE },
{ "SIMPLEX_DUAL_PRIMAL", SIMPLEX_DUAL_PRIMAL, consttype_simplex, ~0, TRUE },
{ "SIMPLEX_PRIMAL_DUAL", SIMPLEX_PRIMAL_DUAL, consttype_simplex, ~0, TRUE },
{ "SIMPLEX_DUAL_DUAL", SIMPLEX_DUAL_DUAL, consttype_simplex, ~0, TRUE },
{ "EPS_TIGHT", EPS_TIGHT, consttype_eps, ~0, TRUE },
{ "EPS_MEDIUM", EPS_MEDIUM, consttype_eps, ~0, TRUE },
{ "EPS_LOOSE", EPS_LOOSE, consttype_eps, ~0, TRUE },
{ "EPS_BAGGY", EPS_BAGGY, consttype_eps, ~0, TRUE },
};
static void createconstant(structlpsolve *lpsolve, int value, unsigned int consttype, char *buf)
{
int i;
*buf = 0;
for (i = 0; i < (int) (sizeof(constants)/sizeof(*constants)); i++)
if ((constants[i].usereturn) && ((constants[i].consttype & consttype) != 0)) {
if (((constants[i].mask == 0) && ((constants[i].value & value) == constants[i].value)) ||
((constants[i].mask != 0) && (constants[i].value == (value & constants[i].mask)))) {
if (*buf)
strcat(buf, "|");
strcat(buf, constants[i].svalue);
}
}
}
static void returnconstant(structlpsolve *lpsolve, int value, unsigned int consttype)
{
if (return_constants) {
char buf[bufsz], *ptr = buf;
createconstant(lpsolve, value, consttype, buf);
CreateString(&lpsolve->lpsolvecaller, &ptr, 1, 0);
}
else {
Long *ipr;
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = value;
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
}
static int constantfromstr(structlpsolve *lpsolve, char *buf, unsigned int consttype)
{
hashelem *hp;
int value = 0;
char *ptr, *ptr1, *ptr0 = buf;
while (*ptr0) {
for (ptr = ptr0; (*ptr) && (*ptr != '|'); ptr++)
*ptr = toupper(*ptr);
if (*ptr == '|') {
*ptr = 0;
ptr1 = ptr + 1;
}
else
ptr1 = ptr;
while ((*ptr0) && (isspace(*ptr0)))
ptr0++;
ptr--;
while ((ptr >= ptr0) && (isspace(*ptr)))
*(ptr--) = 0;
hp = findhash(ptr0, constanthash);
if (hp == NULL) {
strcpy(buf, ptr0);
strncat(buf,": Unknown.", bufsz);
ErrMsgTxt(&lpsolve->lpsolvecaller, buf);
}
if ((constants[hp->index].consttype & consttype) == 0) {
strcpy(buf, ptr0);
strncat(buf,": Not allowed here.", bufsz);
ErrMsgTxt(&lpsolve->lpsolvecaller, buf);
}
if ((constants[hp->index].mask) && ((value & constants[hp->index].mask) != 0)) {
strcpy(buf, ptr0);
strncat(buf," cannot be combined with ", bufsz);
createconstant(lpsolve, value & constants[hp->index].mask, consttype, buf + strlen(buf));
ErrMsgTxt(&lpsolve->lpsolvecaller, buf);
}
value |= constants[hp->index].value;
ptr0 = ptr1;
}
return(value);
}
static int constant(structlpsolve *lpsolve, int element, unsigned int consttype)
{
int value;
char buf[bufsz];
if (GetString(&lpsolve->lpsolvecaller, NULL, element, buf, bufsz, FALSE))
value = constantfromstr(lpsolve, buf, consttype);
else
value = (int) GetRealScalar(&lpsolve->lpsolvecaller, element);
return(value);
}
typedef void (impl_routine)(structlpsolve *lpsolve);
static void impl_set_obj_fn(structlpsolve *lpsolve);
static void addallocmem(structlpsolve *lpsolve, void *ptr)
{
struct structallocatedmemory *allocatedmemory;
allocatedmemory = (struct structallocatedmemory *) matCalloc(1, sizeof(*allocatedmemory));
allocatedmemory->ptr = ptr;
allocatedmemory->next = lpsolve->allocatedmemory;
lpsolve->allocatedmemory = allocatedmemory;
}
static void freeallocmem(structlpsolve *lpsolve, void *ptr)
{
struct structallocatedmemory *allocatedmemory, *allocatedmemory0 = NULL;
for (allocatedmemory = lpsolve->allocatedmemory; allocatedmemory != NULL; allocatedmemory = allocatedmemory->next) {
if (allocatedmemory->ptr == ptr) {
if (allocatedmemory0 == NULL)
lpsolve->allocatedmemory = allocatedmemory->next;
else
allocatedmemory0->next = allocatedmemory->next;
matFree(allocatedmemory);
break;
}
allocatedmemory0 = allocatedmemory;
}
}
static void *mallocmem(structlpsolve *lpsolve, size_t size)
{
void *ptr;
ptr = matCalloc(size, 1);
addallocmem(lpsolve, ptr);
return(ptr);
}
static void *callocmem(structlpsolve *lpsolve, size_t nitems, size_t size)
{
void *ptr;
ptr = matCalloc(nitems, size);
addallocmem(lpsolve, ptr);
return(ptr);
}
static void *reallocmem(structlpsolve *lpsolve, void *ptr, size_t size)
{
if (ptr != NULL)
freeallocmem(lpsolve, ptr);
ptr = realloc(ptr, size);
addallocmem(lpsolve, ptr);
return(ptr);
}
static void freemem(structlpsolve *lpsolve, void *ptr)
{
if (ptr != NULL) {
freeallocmem(lpsolve, ptr);
matFree(ptr);
}
}
void exitnow(structlpsolvecaller *lpsolvecaller)
{
longjmp(lpsolvecaller->exit_mark, -1);
}
int EndOfPgr(int x)
{
return(0);
}
static void Check_nrhs(structlpsolve *lpsolve, int nrhs0)
{
if (lpsolve->lpsolvecaller.nrhs - 1 != nrhs0) {
char buf[bufsz];
sprintf(buf, "%s requires %d argument%s.", lpsolve->cmd, nrhs0, (nrhs0 == 1) ? "" : "s");
ErrMsgTxt(&lpsolve->lpsolvecaller, buf);
}
}
/* callback function for lp_solve. Messages are reported via this routine and printed in the application */
static void __WINAPI mylog(lprec *lp, void *userhandle, char *buf)
{
Printf("%s", buf);
}
static int __WINAPI myabort(lprec *lp, void *userhandle)
{
CheckInterrupted((structlpsolvecaller *) userhandle, &interrupted);
return(interrupted);
}
/* put lp on list */
static int create_handle(structlpsolve *lpsolve, lprec *lp0, char *err)
{
int i;
if (lp0 == NULL)
ErrMsgTxt(&lpsolve->lpsolvecaller, err);
for (i = 0; (i <= lp_last) && (lp[i] != NULL); i++);
if (i > lp_last) {
i = ++lp_last;
if ((i % LPSTEP) == 0) {
#if defined FORTIFY
Fortify_Disable(-1);
#endif
if (i == 0)
lp = (lprec **) malloc(LPSTEP * sizeof(*lp));
else
lp = (lprec **) realloc(lp, (i + LPSTEP) * sizeof(*lp));
#if defined FORTIFY
Fortify_Disable(-2);
#endif
memset(lp + i, 0, LPSTEP * sizeof(*lp));
}
}
lp[i] = lp0;
putlogfunc(lp0, mylog, &lpsolve->lpsolvecaller);
set_outputfile(lp0, "");
putabortfunc(lp0, myabort, &lpsolve->lpsolvecaller);
return(i);
}
/* lp validation test */
static int handle_valid(int handle)
{
if (handle < 0 || handle > lp_last || lp[handle] == NULL)
return(0);
else
return(1);
}
/* free lp from list */
static void delete_handle(int handle)
{
if (handle_valid(handle)) {
char *name;
lprec *lp0 = lp[handle];
name = get_lp_name(lp0);
if ((handlehash != NULL) && (name != NULL) && (*name) && (strcmp(name, "Unnamed"))) {
#if defined FORTIFY
Fortify_Disable(-1);
#endif
drophash(name, NULL, handlehash);
#if defined FORTIFY
Fortify_Disable(-2);
#endif
}
delete_lp(lp0);
lp[handle] = NULL;
}
}
static void set_handlename(lprec *lp0, char *name, int h)
{
if (*name) {
#if defined FORTIFY
Fortify_Disable(-1);
#endif
if (handlehash == NULL)
handlehash = create_hash_table(100, 0);
else {
char *oldname;
oldname = get_lp_name(lp0);
if ((oldname != NULL) && (*oldname) && (strcmp(oldname, "Unnamed")))
drophash(oldname, NULL, handlehash);
}
if (findhash(name, handlehash) == NULL)
puthash(name, h, NULL, handlehash);
#if defined FORTIFY
Fortify_Disable(-2);
#endif
}
}
/* An exit function to clean up the lp structure.
called on exit */
void ExitFcn(void)
{
int i;
if (initialized) {
for (i = 0; i <= lp_last; i++)
delete_handle(i);
#if defined FORTIFY
Fortify_Disable(-1);
#endif
free_hash_table(constanthash);
free_hash_table(cmdhash);
if (handlehash != NULL)
free_hash_table(handlehash);
#if defined FORTIFY
Fortify_Disable(-2);
#endif
exit_lpsolve_lib();
# if defined DEBUG
Printf("Terminated%s", NEWLINE);
# endif
}
}
#if defined DEBUG || defined DEMO
/* xxlpsolve('demo') */
/* This demo is not a necessary part of the program */
#endif
static void impl_demo(structlpsolve *lpsolve)
{
int i, h;
lprec *lp0;
/* Printf("%.15f", GetRealScalar(&lpsolve->lpsolvecaller, 1)); */
Check_nrhs(lpsolve, 0);
h = create_handle(lpsolve, make_lp(0, 4), "make_lp failed");
lp0 = lp[h];
Printf("min: 2 C1 +3 C2 -2 C3 +3 C4;%s", NEWLINE);
str_set_obj_fn(lp0, "2 3 -2 3");
Printf("3 C1 +2 C2 +2 C3 +1 C4 <= 4.0;%s", NEWLINE);
str_add_constraint(lp0, "3 2 2 1", LE, 4.0);
Printf("0 C1 +4 C2 +3 C3 +1 C4 >= 3.0;%s", NEWLINE);
str_add_constraint(lp0, "0 4 3 1", GE, 3.0);
set_verbose(lp0, 0);
Printf("solve: %d%s", solve(lp0), NEWLINE);
Printf("obj: %f%s", get_objective(lp0), NEWLINE);
for (i = 1; i <= get_Ncolumns(lp0); i++)
Printf("C%d: %f%s", i, get_var_primalresult(lp0, get_Nrows(lp0) + i), NEWLINE);
write_lp(lp0, "a.lp");
delete_handle(h);
}
/* since always a matrix vector is provided to both add_column and add_columnex, always call the more
performant sparse version of the two routines */
/* return = xxlpsolve('add_column', lp, [column]) */
/* return = xxlpsolve('add_columnex', lp, [column]) */
static void impl_add_column(structlpsolve *lpsolve)
{
int m, count;
int *index;
REAL *vec;
int result;
Long *ipr;
Check_nrhs(lpsolve, 2);
m = get_Nrows(lpsolve->lp);
vec = (REAL *) callocmem(lpsolve, 1 + m, sizeof(*vec));
index = (int *) callocmem(lpsolve, 1 + m, sizeof(*index));
count = GetRealSparseVector(&lpsolve->lpsolvecaller, 2, vec, index, 0, 1 + m, 0);
result = add_columnex(lpsolve->lp, count, vec, index);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = result;
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
freemem(lpsolve, index);
freemem(lpsolve, vec);
}
/* since always a matrix vector is provided to both add_constraint and add_constraintex, always call the more
performant sparse version of the two routines */
/* return = xxlpsolve('add_constraint', lp, [row], constr_type, rh) */
/* return = xxlpsolve('add_constraintex', lp, [row], constr_type, rh) */
static void impl_add_constraint(structlpsolve *lpsolve)
{
int type, n, count;
int *index;
REAL *vec, value;
int result;
Long *ipr;
Check_nrhs(lpsolve, 4);
type = constant(lpsolve, 3, consttype_constrainttype);
value = GetRealScalar(&lpsolve->lpsolvecaller, 4);
n = get_Ncolumns(lpsolve->lp);
vec = (REAL *) callocmem(lpsolve, n, sizeof(*vec));
index = (int *) callocmem(lpsolve, n, sizeof(*index));
count = GetRealSparseVector(&lpsolve->lpsolvecaller, 2, vec, index, 1, n, 0);
result = add_constraintex(lpsolve->lp, count, vec, index, type, value);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = result;
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
freemem(lpsolve, index);
freemem(lpsolve, vec);
}
/* return = xxlpsolve('add_SOS', lp, name, sostype, priority, [sosvars], [weights]) */
static void impl_add_SOS(structlpsolve *lpsolve)
{
int n, *sosvars;
REAL *weights;
int count1, count2;
int result;
char buf[bufsz];
Long *ipr;
Check_nrhs(lpsolve, 6);
GetString(&lpsolve->lpsolvecaller, NULL, 2, buf, bufsz, TRUE);
n = get_Ncolumns(lpsolve->lp);
sosvars = (int *) callocmem(lpsolve, n, sizeof(*sosvars));
weights = (REAL *) callocmem(lpsolve, n, sizeof(*weights));
count1 = GetIntVector(&lpsolve->lpsolvecaller, 5, sosvars, 0, n, FALSE);
count2 = GetRealVector(&lpsolve->lpsolvecaller, 6, weights, 0, n, FALSE);
if (count1 != count2) {
freemem(lpsolve, weights);
freemem(lpsolve, sosvars);
ErrMsgTxt(&lpsolve->lpsolvecaller, "add_SOS: sosvars and weights vector must have same size.");
}
result = add_SOS(lpsolve->lp, buf, (int) GetRealScalar(&lpsolve->lpsolvecaller, 3), (int) GetRealScalar(&lpsolve->lpsolvecaller, 4), count1, sosvars,weights);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = result;
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
freemem(lpsolve, weights);
freemem(lpsolve, sosvars);
}
/* return = xxlpsolve('column_in_lp', lp, [column]) */
static void impl_column_in_lp(structlpsolve *lpsolve)
{
int n;
REAL *vec;
Long *ipr;
Check_nrhs(lpsolve, 2);
n = get_Nrows(lpsolve->lp);
vec = (REAL *) callocmem(lpsolve, 1 + n, sizeof(*vec));
GetRealVector(&lpsolve->lpsolvecaller, 2, vec, 0, 1 + n, TRUE);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = column_in_lp(lpsolve->lp, vec);
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
freemem(lpsolve, vec);
}
/* xxlpsolve('copy_lp', lp) */
static void impl_copy_lp(structlpsolve *lpsolve)
{
Long *ipr;
Check_nrhs(lpsolve, 1);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = create_handle(lpsolve, copy_lp(lpsolve->lp), "copy_lp failed");
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
/* xxlpsolve('default_basis', lp) */
static void impl_default_basis(structlpsolve *lpsolve)
{
Check_nrhs(lpsolve, 1);
default_basis(lpsolve->lp);
}
/* return = xxlpsolve('del_column', lp, column) */
static void impl_del_column(structlpsolve *lpsolve)
{
Long *ipr;
Check_nrhs(lpsolve, 2);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = del_column(lpsolve->lp, (int) GetRealScalar(&lpsolve->lpsolvecaller, 2));
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
/* return = xxlpsolve('del_constraint', lp, del_row) */
static void impl_del_constraint(structlpsolve *lpsolve)
{
Long *ipr;
Check_nrhs(lpsolve, 2);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = del_constraint(lpsolve->lp, (int) GetRealScalar(&lpsolve->lpsolvecaller, 2));
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
/* xxlpsolve('delete_lp', lp) */
/* xxlpsolve('free_lp', lp) */
static void impl_delete_lp(structlpsolve *lpsolve)
{
Check_nrhs(lpsolve, 1);
delete_handle(lpsolve->h);
}
/* xxlpsolve('dualize_lp', lp) */
static void impl_dualize_lp(structlpsolve *lpsolve)
{
Long *ipr;
Check_nrhs(lpsolve, 1);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = dualize_lp(lpsolve->lp);
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
/* return = xxlpsolve('get_anti_degen', lp) */
static void impl_get_anti_degen(structlpsolve *lpsolve)
{
Check_nrhs(lpsolve, 1);
returnconstant(lpsolve, get_anti_degen(lpsolve->lp), consttype_antidegen);
}
/* [bascolumn] = xxlpsolve('get_basis', lp {, nonbasic}) */
static void impl_get_basis(structlpsolve *lpsolve)
{
int n, i, *bascolumn, *bascolumn0;
MYBOOL nonbasic;
Long *ipr, *ipr0;
if (lpsolve->lpsolvecaller.nrhs == 1+1)
n = 1;
else
n = 2;
Check_nrhs(lpsolve, n);
if (n == 1)
nonbasic = 0;
else
nonbasic = (MYBOOL) GetRealScalar(&lpsolve->lpsolvecaller, 2);
n = get_Nrows(lpsolve->lp) + ((nonbasic) ? get_Ncolumns(lpsolve->lp) : 0);
bascolumn0 = bascolumn = (int *) callocmem(lpsolve, 1 + n, sizeof(*bascolumn));
if(get_basis(lpsolve->lp, bascolumn, nonbasic)) {
ipr0 = ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, n, 1, 0);
for (i = 0; i < n; i++)
*(ipr++) = *(++bascolumn);
}
else {
n = 0;
ipr0 = ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, n, 1, 0);
}
SetLongMatrix(&lpsolve->lpsolvecaller, ipr0, n, 1, 0, TRUE);
freemem(lpsolve, bascolumn0);
}
/* return = xxlpsolve('get_basiscrash', lp) */
static void impl_get_basiscrash(structlpsolve *lpsolve)
{
Check_nrhs(lpsolve, 1);
returnconstant(lpsolve, get_basiscrash(lpsolve->lp), consttype_crash);
}
/* return = xxlpsolve('get_bb_depthlimit', lp) */
static void impl_get_bb_depthlimit(structlpsolve *lpsolve)
{
Long *ipr;
Check_nrhs(lpsolve, 1);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = get_bb_depthlimit(lpsolve->lp);
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
/* return = xxlpsolve('get_bb_floorfirst', lp) */
static void impl_get_bb_floorfirst(structlpsolve *lpsolve)
{
Check_nrhs(lpsolve, 1);
returnconstant(lpsolve, get_bb_floorfirst(lpsolve->lp), consttype_branch);
}
/* return = xxlpsolve('get_bb_rule', lp) */
static void impl_get_bb_rule(structlpsolve *lpsolve)
{
Check_nrhs(lpsolve, 1);
returnconstant(lpsolve, get_bb_rule(lpsolve->lp), consttype_node);
}
/* return = xxlpsolve('get_bounds_tighter', lp) */
static void impl_get_bounds_tighter(structlpsolve *lpsolve)
{
Long *ipr;
Check_nrhs(lpsolve, 1);
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*ipr = get_bounds_tighter(lpsolve->lp);
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 0, TRUE);
}
/* return = xxlpsolve('get_break_at_value', lp) */
static void impl_get_break_at_value(structlpsolve *lpsolve)
{
Double *dpr;
Check_nrhs(lpsolve, 1);
dpr = CreateDoubleMatrix(&lpsolve->lpsolvecaller, 1, 1, 0);
*dpr = get_break_at_value(lpsolve->lp);
SetDoubleMatrix(&lpsolve->lpsolvecaller, dpr, 1, 1, 0, TRUE);
}
/* name = xxlpsolve('get_col_name', lp, column) */
/* [names] = xxlpsolve('get_col_name', lp) */
static void impl_get_col_name(structlpsolve *lpsolve)
{
char *name;
if (lpsolve->lpsolvecaller.nrhs == 1+1) {
int n, i;
char **names;
n = get_Ncolumns(lpsolve->lp);
names = (char **) callocmem(lpsolve, n, sizeof(*names));
for (i = 0; i < n; i++) {
name = get_col_name(lpsolve->lp, i + 1);
if (name == NULL)
name = "";
names[i] = (char *) mallocmem(lpsolve, strlen(name) + 1);
strcpy(names[i], name);
}
CreateString(&lpsolve->lpsolvecaller, names, n, 0);
for (i = 0; i < n; i++)
freemem(lpsolve, names[i]);
freemem(lpsolve, names);
}
else {
Check_nrhs(lpsolve, 2);
name = get_col_name(lpsolve->lp, (int) GetRealScalar(&lpsolve->lpsolvecaller, 2));
if (name == NULL)
name = "";
CreateString(&lpsolve->lpsolvecaller, &name, 1, 0);
}
}
/* [column, return] = xxlpsolve('get_column', lp, col_nr) */
/* [column, return] = xxlpsolve('get_columnex', lp, col_nr) */
static void impl_get_column(structlpsolve *lpsolve)
{
int col;
int result;
Double *dpr;
Long *ipr;
Check_nrhs(lpsolve, 2);
col = (int) GetRealScalar(&lpsolve->lpsolvecaller, 2);
dpr = CreateDoubleMatrix(&lpsolve->lpsolvecaller, 1 + get_Nrows(lpsolve->lp), 1, 0);
result = get_column(lpsolve->lp, col, dpr);
SetDoubleMatrix(&lpsolve->lpsolvecaller, dpr, 1 + get_Nrows(lpsolve->lp), 1, 0, TRUE);
if (lpsolve->lpsolvecaller.nlhs > 1) {
ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, 1, 1, 1);
*ipr = result;
SetLongMatrix(&lpsolve->lpsolvecaller, ipr, 1, 1, 1, TRUE);
}
}
/* return = xxlpsolve('get_constr_type', lp, row) */
/* [constr_type] = xxlpsolve('get_constr_type', lp) */
static void impl_get_constr_type(structlpsolve *lpsolve)
{
Long *ipr, *ipr0;
if (lpsolve->lpsolvecaller.nrhs == 1+1) {
int i, m;
Check_nrhs(lpsolve, 1);
m = get_Nrows(lpsolve->lp);
if (return_constants) {
char **types = NULL, *ptr, buf[bufsz];
types = (char **) callocmem(lpsolve, m, sizeof(*types));
for (i = 1; i <= m; i++) {
createconstant(lpsolve, get_constr_type(lpsolve->lp, i), consttype_constrainttype, buf);
ptr = types[i - 1] = (char *) callocmem(lpsolve, strlen(buf) + 1, sizeof(**types));
strcpy(ptr, buf);
}
CreateString(&lpsolve->lpsolvecaller, types, m, 0);
for (i = 0; i < m; i++)
freemem(lpsolve, types[i]);
freemem(lpsolve, types);
}
else {
ipr0 = ipr = CreateLongMatrix(&lpsolve->lpsolvecaller, m, 1, 0);
for (i = 1; i <= m; i++)
*(ipr++) = get_constr_type(lpsolve->lp, i);
SetLongMatrix(&lpsolve->lpsolvecaller, ipr0, m, 1, 0, TRUE);
}
}
else {
Check_nrhs(lpsolve, 2);
returnconstant(lpsolve, get_constr_type(lpsolve->lp, (int) GetRealScalar(&lpsolve->lpsolvecaller, 2)), consttype_constrainttype);
}
}
/* return = xxlpsolve('get_constr_value', lp, row, [primsolution]) */
static void impl_get_constr_value(structlpsolve *lpsolve)
{
int n, count;
int *nzindex;
REAL *primsolution;
Double *dpr;