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/*
* Reads a polyhedron file on stdin with rationals and outputs
* a canonical form with normalized rhs and sorted constraints.
*
* David Bremner. bremner@cs.mcgill.ca
*
*/
static char rcsid[]="$Id: rat2float.c 2343 2006-04-04 12:34:35Z bremner $";
#ifndef LRSMP
#error This file only compiles with LRSMP
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <float.h>
#include <errno.h>
#include "lrsmp.h"
typedef lrs_mp integer_t;
#define MP_DIGITS 1000L
#include "rat2canon.h"
static int *rows=NULL;
static long int m,n;
static lrs_mp **An;
static lrs_mp **Ad;
int cmprow(const void *i_p,const void *j_p){
int i=*(int *)i_p;
int j=*(int *)j_p;
int cval;
int k=0;
/* the trick here is that the denominators are always positive */
while( k< n &&
( cval=comprod(An[i][k],Ad[j][k],An[j][k],Ad[i][k])) == 0){
k++;
}
return cval;
}
int main(argc,argv)
int argc;
char **argv;
{
int i,j;
char format[BUFSIZ];
char buf[BUFSIZ];
char *cursor;
CHECK_HELP;
lrs_mp_init (MP_DIGITS,stdin,stdout);
while ( fgets(buf,BUFSIZ,stdin) !=NULL )
{
fputs(buf,stdout);
for (cursor=buf; isblank(*cursor); cursor++);
if (strncmp(cursor,"begin",5)==0) break;
}
if (fgets(buf,BUFSIZ,stdin)==NULL) {
fprintf(stderr,"No parameter line");
exit(1);
}
m=strtol(buf,&cursor,10);
if (errno==ERANGE || m==0){
fprintf(stderr,"Missing or absurd row count");
exit(1);
}
An=calloc(m,sizeof(lrs_mp*));
Ad=calloc(m,sizeof(lrs_mp*));
rows=calloc(m,sizeof(int));
n=strtol(cursor,&cursor,10);
if (errno==ERANGE || m==0){
fprintf(stderr,"Missing or absurd column count");
exit(1);
}
for (i=0; i<m; i++){
rows[i]=i;
An[i]=calloc(n,sizeof(lrs_mp));
Ad[i]=calloc(n,sizeof(lrs_mp));
}
while (isblank(*cursor)){
cursor++;
}
if (strncmp(cursor,"integer",7) != 0 && strncmp(cursor,"rational",8)){
fprintf(stderr,"oops. I don't know what to do with a file of type %s\n",
cursor);
exit(1);
}
printf("%ld %ld rational\n",m,n);
for (i=0;i<m;i++)
{
/* read in numbers */
int looking=1;
lrs_mp num0,den0;
for(j=0;j<n;j++)
{
char *p;
integer_t num,den;
double out;
readrat(num,den);
if (looking==1 && !zero(num)){
copy(num0,num);
if (negative(num)) {
changesign(num0);
itomp(-1,An[i][j]);
} else {
itomp(1,An[i][j]);
}
copy(den0,den);
itomp(1,Ad[i][j]);
looking=0;
} else {
if (zero(num)) {
itomp(0,An[i][j]);
itomp(1,Ad[i][j]);
} else {
lrs_mp outnum,outden;
if (!zero(num0)){
divrat(num,den,num0,den0,An[i][j],Ad[i][j]);
} else {
copy(An[i][j],num);
copy(Ad[i][j],den);
}
}
}
}
}
fgets(buf,BUFSIZ,stdin); /* clean off last line */
qsort(rows,m,sizeof(int), cmprow);
for (i=0; i< m; i++){
for(j=0; j<n; j++){
prat("",An[rows[i]][j],Ad[rows[i]][j]);
}
fputs("\n",stdout);
}
while (fgets(buf,BUFSIZ,stdin) !=NULL )
{
fputs(buf,stdout);
}
}
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