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lp_matrix.c
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#include <string.h>
#include "commonlib.h"
#include "lp_lib.h"
#include "lp_scale.h"
#include "lp_report.h"
#include "lp_price.h"
#include "lp_pricePSE.h"
#include "lp_matrix.h"
#ifdef FORTIFY
# include "lp_fortify.h"
#endif
/* -------------------------------------------------------------------------
Basic matrix routines in lp_solve v5.0+
-------------------------------------------------------------------------
Author: Michel Berkelaar (to lp_solve v3.2),
Kjell Eikland (v4.0 and forward)
Contact: kjell.eikland@broadpark.no
License terms: LGPL.
Requires: lp_lib.h, lp_pricerPSE.h, lp_matrix.h
Release notes:
v5.0.0 1 January 2004 First integrated and repackaged version.
v5.0.1 7 May 2004 Added matrix transpose function.
v5.1.0 20 July 2004 Reworked with flexible matrix storage model.
v5.2.0 10 January 2005 Added fast deletion methods.
Added data extraction to matrix method.
Changed to explicit OF storage mode.
------------------------------------------------------------------------- */
STATIC MATrec *mat_create(lprec *lp, int rows, int columns, REAL epsvalue)
{
MATrec *newmat;
newmat = (MATrec *) calloc(1, sizeof(*newmat));
newmat->lp = lp;
newmat->rows_alloc = 0;
newmat->columns_alloc = 0;
newmat->mat_alloc = 0;
inc_matrow_space(newmat, rows);
newmat->rows = rows;
inc_matcol_space(newmat, columns);
newmat->columns = columns;
inc_mat_space(newmat, 0);
newmat->epsvalue = epsvalue;
return( newmat );
}
STATIC void mat_free(MATrec **matrix)
{
if((matrix == NULL) || (*matrix == NULL))
return;
#if MatrixColAccess==CAM_Record
FREE((*matrix)->col_mat);
#else /*if MatrixColAccess==CAM_Vector*/
FREE((*matrix)->col_mat_colnr);
FREE((*matrix)->col_mat_rownr);
FREE((*matrix)->col_mat_value);
#endif
FREE((*matrix)->col_end);
FREE((*matrix)->col_tag);
#if MatrixRowAccess==RAM_Index
FREE((*matrix)->row_mat);
#elif MatrixColAccess==CAM_Record
FREE((*matrix)->row_mat);
#else /*if MatrixRowAccess==COL_Vector*/
FREE((*matrix)->row_mat_colnr);
FREE((*matrix)->row_mat_rownr);
FREE((*matrix)->row_mat_value);
#endif
FREE((*matrix)->row_end);
FREE((*matrix)->row_tag);
FREE((*matrix)->colmax);
FREE((*matrix)->rowmax);
FREE(*matrix);
}
STATIC MYBOOL mat_memopt(MATrec *mat, int rowextra, int colextra, int nzextra)
{
MYBOOL status = TRUE;
int matalloc, colalloc, rowalloc;
if((mat == NULL) ||
#if 0
(++rowextra < 1) || (++colextra < 1) || (++nzextra < 1))
#else
(rowextra < 0) || (colextra < 0) || (nzextra < 0))
#endif
return( FALSE );
mat->rows_alloc = MIN(mat->rows_alloc, mat->rows + rowextra);
mat->columns_alloc = MIN(mat->columns_alloc, mat->columns + colextra);
mat->mat_alloc = MIN(mat->mat_alloc, mat->col_end[mat->columns] + nzextra);
#if 0
rowalloc = mat->rows_alloc;
colalloc = mat->columns_alloc;
matalloc = mat->mat_alloc;
#else
rowalloc = mat->rows_alloc + 1;
colalloc = mat->columns_alloc + 1;
matalloc = mat->mat_alloc + 1;
#endif
#if MatrixColAccess==CAM_Record
mat->col_mat = (MATitem *) realloc(mat->col_mat, matalloc * sizeof(*(mat->col_mat)));
status &= (mat->col_mat != NULL);
#else /*if MatrixColAccess==CAM_Vector*/
status &= allocINT(mat->lp, &(mat->col_mat_colnr), matalloc, AUTOMATIC) &&
allocINT(mat->lp, &(mat->col_mat_rownr), matalloc, AUTOMATIC) &&
allocREAL(mat->lp, &(mat->col_mat_value), matalloc, AUTOMATIC);
#endif
status &= allocINT(mat->lp, &mat->col_end, colalloc, AUTOMATIC);
if(mat->col_tag != NULL)
status &= allocINT(mat->lp, &mat->col_tag, colalloc, AUTOMATIC);
#if MatrixRowAccess==RAM_Index
status &= allocINT(mat->lp, &(mat->row_mat), matalloc, AUTOMATIC);
#elif MatrixColAccess==CAM_Record
mat->row_mat = (MATitem *) realloc(mat->row_mat, matalloc * sizeof(*(mat->row_mat)));
status &= (mat->row_mat != NULL);
#else /*if MatrixRowAccess==COL_Vector*/
status &= allocINT(mat->lp, &(mat->row_mat_colnr), matalloc, AUTOMATIC) &&
allocINT(mat->lp, &(mat->row_mat_rownr), matalloc, AUTOMATIC) &&
allocREAL(mat->lp, &(mat->row_mat_value), matalloc, AUTOMATIC);
#endif
status &= allocINT(mat->lp, &mat->row_end, rowalloc, AUTOMATIC);
if(mat->row_tag != NULL)
status &= allocINT(mat->lp, &mat->row_tag, rowalloc, AUTOMATIC);
if(mat->colmax != NULL)
status &= allocREAL(mat->lp, &(mat->colmax), colalloc, AUTOMATIC);
if(mat->rowmax != NULL)
status &= allocREAL(mat->lp, &(mat->rowmax), rowalloc, AUTOMATIC);
return( status );
}
STATIC MYBOOL inc_mat_space(MATrec *mat, int mindelta)
{
int spaceneeded, nz = mat_nonzeros(mat);
if(mindelta <= 0)
mindelta = MAX(mat->rows, mat->columns) + 1;
spaceneeded = DELTA_SIZE(mindelta, nz);
SETMAX(mindelta, spaceneeded);
if(mat->mat_alloc == 0)
spaceneeded = mindelta;
else
spaceneeded = nz + mindelta;
if(spaceneeded >= mat->mat_alloc) {
/* Let's allocate at least MAT_START_SIZE entries */
if(mat->mat_alloc < MAT_START_SIZE)
mat->mat_alloc = MAT_START_SIZE;
/* Increase the size by RESIZEFACTOR each time it becomes too small */
while(spaceneeded >= mat->mat_alloc)
mat->mat_alloc += mat->mat_alloc / RESIZEFACTOR;
#if MatrixColAccess==CAM_Record
mat->col_mat = (MATitem *) realloc(mat->col_mat, (mat->mat_alloc) * sizeof(*(mat->col_mat)));
#else /*if MatrixColAccess==CAM_Vector*/
allocINT(mat->lp, &(mat->col_mat_colnr), mat->mat_alloc, AUTOMATIC);
allocINT(mat->lp, &(mat->col_mat_rownr), mat->mat_alloc, AUTOMATIC);
allocREAL(mat->lp, &(mat->col_mat_value), mat->mat_alloc, AUTOMATIC);
#endif
#if MatrixRowAccess==RAM_Index
allocINT(mat->lp, &(mat->row_mat), mat->mat_alloc, AUTOMATIC);
#elif MatrixColAccess==CAM_Record
mat->row_mat = (MATitem *) realloc(mat->row_mat, (mat->mat_alloc) * sizeof(*(mat->row_mat)));
#else /*if MatrixColAccess==CAM_Vector*/
allocINT(mat->lp, &(mat->row_mat_colnr), mat->mat_alloc, AUTOMATIC);
allocINT(mat->lp, &(mat->row_mat_rownr), mat->mat_alloc, AUTOMATIC);
allocREAL(mat->lp, &(mat->row_mat_value), mat->mat_alloc, AUTOMATIC);
#endif
}
return(TRUE);
}
STATIC MYBOOL inc_matrow_space(MATrec *mat, int deltarows)
{
int rowsum, oldrowsalloc;
MYBOOL status = TRUE;
/* Adjust lp row structures */
if(mat->rows+deltarows >= mat->rows_alloc) {
/* Update memory allocation and sizes */
oldrowsalloc = mat->rows_alloc;
deltarows = DELTA_SIZE(deltarows, mat->rows);
SETMAX(deltarows, DELTAROWALLOC);
mat->rows_alloc += deltarows;
rowsum = mat->rows_alloc + 1;
/* Update row pointers */
status = allocINT(mat->lp, &mat->row_end, rowsum, AUTOMATIC);
mat->row_end_valid = FALSE;
}
return( status );
}
STATIC MYBOOL inc_matcol_space(MATrec *mat, int deltacols)
{
int i, colsum, oldcolsalloc;
MYBOOL status = TRUE;
/* Adjust lp column structures */
if(mat->columns+deltacols >= mat->columns_alloc) {
/* Update memory allocation and sizes */
oldcolsalloc = mat->columns_alloc;
deltacols = DELTA_SIZE(deltacols, mat->columns);
SETMAX(deltacols, DELTACOLALLOC);
mat->columns_alloc += deltacols;
colsum = mat->columns_alloc + 1;
status = allocINT(mat->lp, &mat->col_end, colsum, AUTOMATIC);
/* Update column pointers */
if(oldcolsalloc == 0)
mat->col_end[0] = 0;
for(i = MIN(oldcolsalloc, mat->columns) + 1; i < colsum; i++)
mat->col_end[i] = mat->col_end[i-1];
mat->row_end_valid = FALSE;
}
return( status );
}
STATIC int mat_collength(MATrec *mat, int colnr)
{
return( mat->col_end[colnr] - mat->col_end[colnr-1] );
}
STATIC int mat_rowlength(MATrec *mat, int rownr)
{
if(mat_validate(mat)) {
if(rownr <= 0)
return( mat->row_end[0] );
else
return( mat->row_end[rownr] - mat->row_end[rownr-1] );
}
else
return( 0 );
}
STATIC int mat_nonzeros(MATrec *mat)
{
return( mat->col_end[mat->columns] );
}
STATIC MYBOOL mat_indexrange(MATrec *mat, int index, MYBOOL isrow, int *startpos, int *endpos)
{
#ifdef Paranoia
if(isrow && ((index < 0) || (index > mat->rows)))
return( FALSE );
else if(!isrow && ((index < 1) || (index > mat->columns)))
return( FALSE );
#endif
if(isrow && mat_validate(mat)) {
if(index == 0)
*startpos = 0;
else
*startpos = mat->row_end[index-1];
*endpos = mat->row_end[index];
}
else {
*startpos = mat->col_end[index-1];
*endpos = mat->col_end[index];
}
return( TRUE );
}
STATIC int mat_shiftrows(MATrec *mat, int *bbase, int delta, LLrec *varmap)
{
int j, k, i, ii, thisrow, *colend, base;
MYBOOL preparecompact = FALSE;
int *rownr;
if(delta == 0)
return( 0 );
base = abs(*bbase);
if(delta > 0) {
/* Insert row by simply incrementing existing row indeces */
if(base <= mat->rows) {
k = mat_nonzeros(mat);
rownr = &COL_MAT_ROWNR(0);
for(ii = 0; ii < k; ii++, rownr += matRowColStep) {
if(*rownr >= base)
*rownr += delta;
}
}
/* Set defaults (actual basis set in separate procedure) */
for(i = 0; i < delta; i++) {
ii = base + i;
mat->row_end[ii] = 0;
}
}
else if(base <= mat->rows) {
/* Check for preparation of mass-deletion of rows */
preparecompact = (MYBOOL) (varmap != NULL);
if(preparecompact) {
/* Create the offset array */
int *newrowidx = NULL;
allocINT(mat->lp, &newrowidx, mat->rows+1, FALSE);
newrowidx[0] = 0;
delta = 0;
for(j = 1; j <= mat->rows; j++) {
if(isActiveLink(varmap, j)) {
delta++;
newrowidx[j] = delta;
}
else
newrowidx[j] = -1;
}
k = 0;
delta = 0;
base = mat_nonzeros(mat);
rownr = &COL_MAT_ROWNR(0);
for(i = 0; i < base; i++, rownr += matRowColStep) {
thisrow = newrowidx[*rownr];
if(thisrow < 0) {
*rownr = -1;
delta++;
}
else
*rownr = thisrow;
}
FREE(newrowidx);
return(delta);
}
/* Check if we should prepare for compacting later
(this is in order to speed up multiple row deletions) */
preparecompact = (MYBOOL) (*bbase < 0);
if(preparecompact)
*bbase = my_flipsign((*bbase));
/* First make sure we don't cross the row count border */
if(base-delta-1 > mat->rows)
delta = base - mat->rows - 1;
/* Then scan over all entries shifting and updating rows indeces */
if(preparecompact) {
k = 0;
for(j = 1, colend = mat->col_end + 1;
j <= mat->columns; j++, colend++) {
i = k;
k = *colend;
rownr = &COL_MAT_ROWNR(i);
for(; i < k; i++, rownr += matRowColStep) {
thisrow = *rownr;
if(thisrow < base)
continue;
else if(thisrow >= base-delta)
*rownr += delta;
else
*rownr = -1;
}
}
}
else {
k = 0;
ii = 0;
for(j = 1, colend = mat->col_end + 1;
j <= mat->columns; j++, colend++) {
i = k;
k = *colend;
rownr = &COL_MAT_ROWNR(i);
for(; i < k; i++, rownr += matRowColStep) {
thisrow = *rownr;
if(thisrow >= base) {
if(thisrow >= base-delta)
*rownr += delta;
else
continue;
}
if(ii != i) {
COL_MAT_COPY(ii, i);
}
ii++;
}
*colend = ii;
}
}
}
return( 0 );
}
/* Map-based compacting+insertion of matrix elements without changing row and column indeces.
When mat2 is NULL, a simple compacting of non-deleted rows and columns is done. */
STATIC int mat_mapreplace(MATrec *mat, LLrec *rowmap, LLrec *colmap, MATrec *mat2)
{
lprec *lp = mat->lp;
int i, ib, ie, ii, j, jj, jb, je, nz, *colend, *rownr, *rownr2, *indirect = NULL;
REAL *value, *value2;
/* Check if there is something to insert */
if((mat2 != NULL) && ((mat2->col_tag == NULL) || (mat2->col_tag[0] <= 0) || (mat_nonzeros(mat2) == 0)))
return( 0 );
/* Create map and sort by increasing index in "mat" */
if(mat2 != NULL) {
jj = mat2->col_tag[0];
allocINT(lp, &indirect, jj+1, FALSE);
indirect[0] = jj;
for(i = 1; i <= jj; i++)
indirect[i] = i;
hpsortex(mat2->col_tag, jj, 1, sizeof(*indirect), FALSE, compareINT, indirect);
}
/* Do the compacting */
mat->row_end_valid = FALSE;
nz = mat->col_end[mat->columns];
ie = 0;
ii = 0;
if((mat2 == NULL) || (indirect[0] == 0)) {
je = mat->columns + 1;
jj = 1;
jb = 0;
}
else {
je = indirect[0];
jj = 0;
do {
jj++;
jb = mat2->col_tag[jj];
} while(jb <= 0);
}
for(j = 1, colend = mat->col_end + 1;
j <= mat->columns; j++, colend++) {
ib = ie;
ie = *colend;
/* Always skip (condense) replacement columns */
if(j == jb) {
jj++;
if(jj <= je)
jb = mat2->col_tag[jj];
else
jb = mat->columns + 1;
}
/* Only include active columns */
else if(isActiveLink(colmap, j)) {
rownr = &COL_MAT_ROWNR(ib);
for(; ib < ie; ib++, rownr += matRowColStep) {
/* Also make sure the row is active */
if(isActiveLink(rowmap, *rownr)) {
if(ii != ib) {
COL_MAT_COPY(ii, ib);
}
ii++;
}
}
}
*colend = ii;
}
if(mat2 == NULL)
goto Finish;
/* Tally non-zero insertions */
i = 0;
for(j = 1; j <= mat2->col_tag[0]; j++) {
jj = mat2->col_tag[j];
if((jj > 0) && isActiveLink(colmap, jj)) {
jj = indirect[j];
je = mat2->col_end[jj];
jb = mat2->col_end[jj-1];
rownr2 = &COL_MAT2_ROWNR(jb);
for(; jb < je; jb++, rownr2 += matRowColStep) {
if((*rownr2 > 0) && isActiveLink(rowmap, *rownr2))
i++;
}
}
}
/* Make sure we have enough matrix space */
ii = mat->col_end[mat->columns] + i;
if(mat->mat_alloc <= ii)
inc_mat_space(mat, i);
/* Do shifting and insertion - loop from the end going forward */
jj = indirect[0];
jj = mat2->col_tag[jj];
for(j = mat->columns, colend = mat->col_end + mat->columns, ib = *colend;
j > 0; j--) {
/* Update indeces for this loop */
ie = ib;
*colend = ii;
colend--;
ib = *colend;
/* Insert new values */
if(j == jj) {
/* Only include an active column */
if(isActiveLink(colmap, j)) {
jj = indirect[0];
jj = indirect[jj];
rownr = &COL_MAT_ROWNR(ii-1);
value = &COL_MAT_VALUE(ii-1);
jb = mat2->col_end[jj-1];
je = mat2->col_end[jj] - 1;
rownr2 = &COL_MAT2_ROWNR(je);
value2 = &COL_MAT2_VALUE(je);
/* Process constraint coefficients */
for(; je >= jb; je--, rownr2 -= matRowColStep, value2 -= matValueStep) {
i = *rownr2;
if(i == 0) {
i = -1;
break;
}
else if(isActiveLink(rowmap, i)) {
ii--;
*rownr = i;
rownr -= matRowColStep;
*value = my_chsign(is_chsign(lp, i), *value2);
value -= matValueStep;
}
}
/* Then handle the objective */
if(i == -1) {
lp->orig_obj[j] = my_chsign(is_maxim(lp), *value2);
rownr2 -= matRowColStep;
value2 -= matValueStep;
}
else
lp->orig_obj[j] = 0;
}
/* Update replacement column index or break if no more candidates */
jj = --indirect[0];
if(jj == 0)
break;
jj = mat2->col_tag[jj];
if(jj <= 0)
break;
}
/* Shift existing values down */
else {
if(isActiveLink(colmap, j))
while(ie > ib) {
ii--;
ie--;
if(ie != ii) {
COL_MAT_COPY(ii, ie);
}
}
}
}
/* Return the delta number of non-zero elements */
Finish:
nz -= mat->col_end[mat->columns];
FREE(indirect);
return( nz );
}
/* Routines to compact rows in matrix based on precoded entries */
STATIC int mat_zerocompact(MATrec *mat)
{
return( mat_rowcompact(mat, TRUE) );
}
STATIC int mat_rowcompact(MATrec *mat, MYBOOL dozeros)
{
int i, ie, ii, j, nn, *colend, *rownr;
REAL *value;
nn = 0;
ie = 0;
ii = 0;
for(j = 1, colend = mat->col_end + 1;
j <= mat->columns; j++, colend++) {
i = ie;
ie = *colend;
rownr = &COL_MAT_ROWNR(i);
value = &COL_MAT_VALUE(i);
for(; i < ie;
i++, rownr += matRowColStep, value += matValueStep) {
if((*rownr < 0) || (dozeros && (fabs(*value) < mat->epsvalue))) {
nn++;
continue;
}
if(ii != i) {
COL_MAT_COPY(ii, i);
}
ii++;
}
*colend = ii;
}
return( nn );
}
/* Routines to compact columns and their indeces based on precoded entries */
STATIC int mat_colcompact(MATrec *mat, int prev_rows, int prev_cols)
{
int i, ii, j, k, n_del, n_sum, *colend, *newcolend, *colnr, newcolnr;
MYBOOL deleted;
lprec *lp = mat->lp;
presolveundorec *lpundo = lp->presolve_undo;
n_sum = 0;
k = 0;
ii = 0;
newcolnr = 1;
for(j = 1, colend = newcolend = mat->col_end + 1;
j <= prev_cols; j++, colend++) {
n_del = 0;
i = k;
k = *colend;
for(colnr = &COL_MAT_COLNR(i); i < k;
i++, colnr += matRowColStep) {
if(*colnr < 0) {
n_del++;
n_sum++;
continue;
}
if(ii < i) {
COL_MAT_COPY(ii, i);
}
if(newcolnr < j) {
COL_MAT_COLNR(ii) = newcolnr;
}
ii++;
}
*newcolend = ii;
deleted = (MYBOOL) (n_del > 0);
#if 1
/* Do hoops in case there was an empty column */
deleted |= (MYBOOL) (!lp->wasPresolved && (lpundo->var_to_orig[prev_rows+j] < 0));
#endif
/* Increment column variables if current column was not deleted */
if(!deleted) {
newcolend++;
newcolnr++;
}
}
return(n_sum);
}
STATIC int mat_shiftcols(MATrec *mat, int *bbase, int delta, LLrec *varmap)
{
int i, ii, k, n, base;
k = 0;
if(delta == 0)
return( k );
base = abs(*bbase);
if(delta > 0) {
/* Shift pointers right */
for(ii = mat->columns; ii > base; ii--) {
i = ii + delta;
mat->col_end[i] = mat->col_end[ii];
}
/* Set defaults */
for(i = 0; i < delta; i++) {
ii = base + i;
mat->col_end[ii] = mat->col_end[ii-1];
}
}
else {
/* Check for preparation of mass-deletion of columns */
MYBOOL preparecompact = (MYBOOL) (varmap != NULL);
if(preparecompact) {
/* Create the offset array */
int j, *colnr, *colend;
n = 0;
k = 0;
base = 0;
for(j = 1, colend = mat->col_end + 1;
j <= mat->columns; j++, colend++) {
i = k;
k = *colend;
if(isActiveLink(varmap, j)) {
base++;
ii = base;
}
else
ii = -1;
if(ii < 0)
n += k - i;
colnr = &COL_MAT_COLNR(i);
for(; i < k; i++, colnr += matRowColStep)
*colnr = ii;
}
return(n);
}
/* Check if we should prepare for compacting later
(this is in order to speed up multiple column deletions) */
preparecompact = (MYBOOL) (*bbase < 0);
if(preparecompact)
*bbase = my_flipsign((*bbase));
/* First make sure we don't cross the column count border */
if(base-delta-1 > mat->columns)
delta = base - mat->columns - 1;
/* Then scan over all entries shifting and updating column indeces */
if(preparecompact) {
int *colnr;
n = 0;
i = mat->col_end[base-1];
k = mat->col_end[base-delta-1];
for(colnr = &COL_MAT_COLNR(i); i < k;
i++, colnr += matRowColStep) {
n++;
*colnr = -1;
}
k = n;
}
else {
/* Delete sparse matrix data, if required */
if(base <= mat->columns) {
i = mat->col_end[base-1]; /* Beginning of data to be deleted */
ii = mat->col_end[base-delta-1]; /* Beginning of data to be shifted left */
n = mat_nonzeros(mat); /* Total number of non-zeros */
k = ii-i; /* Number of entries to be deleted */
if((k > 0) && (n > i)) {
n -= ii;
COL_MAT_MOVE(i, ii, n);
}
/* Update indexes */
for(i = base; i <= mat->columns + delta; i++) {
ii = i - delta;
mat->col_end[i] = mat->col_end[ii] - k;
}
}
}
}
return( k );
}
STATIC MATrec *mat_extractmat(MATrec *mat, LLrec *rowmap, LLrec *colmap, MYBOOL negated)
{
int *rownr, *colnr, xa, na;
REAL *value;
MATrec *newmat = mat_create(mat->lp, mat->rows, mat->columns, mat->epsvalue);
/* Initialize */
na = mat_nonzeros(mat);
rownr = &COL_MAT_ROWNR(0);
colnr = &COL_MAT_COLNR(0);
value = &COL_MAT_VALUE(0);
/* Loop over the indeces, picking out values in qualifying rows and colums
(note that the loop could be speeded up for dense matrices by making an
outer loop for columns and inner loop for rows) */
for(xa = 0; xa < na; xa++, rownr += matRowColStep, colnr += matRowColStep, value += matValueStep) {
if((isActiveLink(colmap, *colnr) ^ negated) &&
(isActiveLink(rowmap, *rownr) ^ negated))
mat_setvalue(newmat, *rownr, *colnr, *value, FALSE);
}
/* Return the populated new matrix */
return( newmat );
}
STATIC MYBOOL mat_setcol(MATrec *mat, int colno, int count, REAL *column, int *rowno, MYBOOL doscale, MYBOOL checkrowmode)
{
int i, jj = 0, elmnr, orignr, newnr, firstrow;
MYBOOL *addto = NULL, isA, isNZ;
REAL value, saved = 0;
lprec *lp = mat->lp;
/* Check if we are in row order mode and should add as row instead;
the matrix will be transposed at a later stage */
if(checkrowmode && mat->is_roworder)
return( mat_setrow(mat, colno, count, column, rowno, doscale, FALSE) );
/* Initialize and validate */
isA = (MYBOOL) (mat == mat->lp->matA);
isNZ = (MYBOOL) (rowno != NULL);
if(!isNZ)
count = mat->lp->rows;
else if((count < 0) || (count > mat->rows+((mat->is_roworder) ? 0 : 1)))
return( FALSE );
if(isNZ && (count > 0)) {
if(count > 1)
sortREALByINT(column, rowno, count, 0, TRUE);
if((rowno[0] < 0) || (rowno[count-1] > mat->rows))
return( FALSE );
}
/* Capture OF definition in column mode */
if(isA && !mat->is_roworder) {
if(isNZ && (count > 0) && (rowno[0] == 0)) {
value = column[0];
#ifdef DoMatrixRounding
value = roundToPrecision(value, mat->epsvalue);
#endif
if(doscale)
value = scaled_mat(lp, value, 0, colno);
value = my_chsign(is_maxim(lp), value);
lp->orig_obj[colno] = value;
count--;
column++;
rowno++;
}
else if(!isNZ && (column[0] != 0)) {
value = saved = column[0];
#ifdef DoMatrixRounding
value = roundToPrecision(value, mat->epsvalue);
#endif
if(doscale)
value = scaled_mat(lp, value, 0, colno);
value = my_chsign(is_maxim(lp), value);
lp->orig_obj[colno] = value;
column[0] = 0;
}
else
lp->orig_obj[colno] = 0;
}
/* Optionally tally and map the new non-zero values */
firstrow = mat->rows + 1;
if(isNZ) {
newnr = count;
if(newnr) {
firstrow = rowno[0];
jj = rowno[newnr - 1];
}
}
else {
newnr = 0;
if(!allocMYBOOL(lp, &addto, mat->rows + 1, TRUE)) {
return( FALSE );
}
for(i = mat->rows; i >= 0; i--) {
if(fabs(column[i]) > mat->epsvalue) {
addto[i] = TRUE;
firstrow = i;
newnr++;
}
}
}
/* Make sure we have enough matrix space */
if(!inc_mat_space(mat, newnr)) {
newnr = 0;
goto Done;
}
/* Shift existing column data and adjust position indeces */
orignr = mat_collength(mat, colno);
elmnr = newnr - orignr;
i = mat_nonzeros(mat) - mat->col_end[colno];
if((elmnr != 0) && (i > 0)) {
COL_MAT_MOVE(mat->col_end[colno] + elmnr, mat->col_end[colno], i);
}
if(elmnr != 0)
for(i = colno; i <= mat->columns; i++)
mat->col_end[i] += elmnr;
/* We are now ready to copy the new data */
jj = mat->col_end[colno-1];
if(isNZ) {
for(i = 0; i < count; jj++, i++) {
value = column[i];
#ifdef DoMatrixRounding
value = roundToPrecision(value, mat->epsvalue);
#endif
if(mat->is_roworder) { /* Fix following Ingmar Stein bug report 12.10.2006 */
if(isA && doscale)
value = scaled_mat(lp, value, colno, rowno[i]);
if(isA)
value = my_chsign(is_chsign(lp, colno), value);
}
else {
if(isA && doscale)
value = scaled_mat(lp, value, rowno[i], colno);
if(isA)
value = my_chsign(is_chsign(lp, rowno[i]), value);
}
SET_MAT_ijA(jj, rowno[i], colno, value);
}
}
else {
for(i = firstrow; i <= mat->rows; i++) {
if(!addto[i])
continue;
value = column[i];
#ifdef DoMatrixRounding
value = roundToPrecision(value, mat->epsvalue);
#endif
if(mat->is_roworder) { /* Fix following Ingmar Stein bug report 12.10.2006 */
if(isA && doscale)
value = scaled_mat(lp, value, colno, i);
if(isA)
value = my_chsign(is_chsign(lp, colno), value);
}
else {
if(isA && doscale)
value = scaled_mat(lp, value, i, colno);
if(isA)
value = my_chsign(is_chsign(lp, i), value);
}
SET_MAT_ijA(jj, i, colno, value);
jj++;
}
}
mat->row_end_valid = FALSE;
/* Finish and return */
Done:
if(saved != 0)
column[0] = saved;
FREE(addto);
return( TRUE );
}
STATIC MYBOOL mat_mergemat(MATrec *target, MATrec *source, MYBOOL usecolmap)
{
lprec *lp = target->lp;
int i, ix, iy, n, *colmap = NULL;
REAL *colvalue = NULL;
if((target->rows < source->rows) || !allocREAL(lp, &colvalue, target->rows+1, FALSE))
return( FALSE );
if(usecolmap) {
n = source->col_tag[0];
allocINT(lp, &colmap, n+1, FALSE);
for(i = 1; i <= n; i++)
colmap[i] = i;
hpsortex(source->col_tag, n, 1, sizeof(*colmap), FALSE, compareINT, colmap);
}
else
n = source->columns;
for(i = 1; i <= n; i++) {
if(!usecolmap && (mat_collength(source, i) == 0))
continue;
if(usecolmap) {
ix = colmap[i];
if(ix <= 0)
continue;
iy = source->col_tag[i];
if(iy <= 0)
continue;
}
else
ix = iy = i;
mat_expandcolumn(source, ix, colvalue, NULL, FALSE);
mat_setcol(target, iy, 0, colvalue, NULL, FALSE, FALSE);
}
FREE( colvalue );
FREE( colmap );
return( TRUE );
}
STATIC int mat_nz_unused(MATrec *mat)
{
return( mat->mat_alloc - mat->col_end[mat->columns] );
}
#if 0
STATIC MYBOOL mat_setrow(MATrec *mat, int rowno, int count, REAL *row, int *colno, MYBOOL doscale, MYBOOL checkrowmode)
{
lprec *lp = mat->lp;
int delta;
int k, kk, i, ii, j, jj = 0, jj_j, elmnr, orignr, newnr, firstcol, rownr, colnr, matz = 0;
MYBOOL *addto = NULL, isA, isNZ;
REAL value = 0.0, saved = 0;
/* Check if we are in row order mode and should add as column instead;