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use log::{debug, warn};
use num_traits::Float;
use thiserror::Error;
use threadpool::ThreadPool;
use std::f64::INFINITY;
use std::fs::File;
use std::io::Read;
use std::result;
use std::sync::{Arc, RwLock};
/// An error in the mmcf file format.
#[derive(Debug, Error)]
#[non_exhaustive]
pub enum MMCFReadError {
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use log::{debug, warn};
use num_traits::Float;
use thiserror::Error;
use threadpool::ThreadPool;
use std::f64::INFINITY;
use std::fs::File;
use std::io::{BufRead, BufReader, Read};
use std::result;
use std::sync::{Arc, RwLock};
/// An error in the mmcf file format.
#[derive(Debug, Error)]
#[non_exhaustive]
pub enum MMCFReadError {
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pub fn read_mnetgen_with_solver<S>(basename: &str) -> std::result::Result<MMCFProblem, MMCFReadError>
where
S: Solver + 'static,
{
use MMCFReadError::*;
let mut buffer = String::new();
{
let mut f = File::open(&format!("{}.nod", basename))?;
f.read_to_string(&mut buffer)?;
}
let mut data = buffer.split_whitespace();
ncom = data.next().ok_or(MissingNodField("ncom"))?.parse::<usize>()?;
nnodes = data.next().ok_or(MissingNodField("nnodes"))?.parse::<usize>()?;
narcs = data.next().ok_or(MissingNodField("narcs"))?.parse::<usize>()?;
ncaps = data.next().ok_or(MissingNodField("ncaps"))?.parse::<usize>()?;
if data.next().is_some() {
return Err(ExtraNodField);
}
}
// read nodes
let mut nets = Vec::with_capacity(ncom);
for i in 0..ncom {
nets.push(mcf::NetSpxSolver::new(i, nnodes)?)
}
{
let mut f = File::open(&format!("{}.sup", basename))?;
buffer.clear();
f.read_to_string(&mut buffer)?;
}
for line in buffer.lines() {
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pub fn read_mnetgen_with_solver<S>(basename: &str) -> std::result::Result<MMCFProblem, MMCFReadError>
where
S: Solver + 'static,
{
use MMCFReadError::*;
let ncom;
let nnodes;
let narcs;
let ncaps;
{
let mut data = File::open(&format!("{}.nod", basename)).map(BufReader::new)?.lines();
ncom = data.next().ok_or(MissingNodField("ncom"))??.parse::<usize>()?;
nnodes = data.next().ok_or(MissingNodField("nnodes"))??.parse::<usize>()?;
narcs = data.next().ok_or(MissingNodField("narcs"))??.parse::<usize>()?;
ncaps = data.next().ok_or(MissingNodField("ncaps"))??.parse::<usize>()?;
if data.next().is_some() {
return Err(ExtraNodField);
}
}
// read nodes
let mut nets = Vec::with_capacity(ncom);
for i in 0..ncom {
nets.push(mcf::NetSpxSolver::new(i, nnodes)?)
}
for line in File::open(&format!("{}.sup", basename)).map(BufReader::new)?.lines() {
let line = line?;
let mut data = line.split_whitespace();
let node = data.next().ok_or(MissingSupField("node"))?.parse::<usize>()?;
let com = data.next().ok_or(MissingSupField("com"))?.parse::<usize>()?;
let supply = data.next().ok_or(MissingSupField("supply"))?.parse::<Real>()?;
if data.next().is_some() {
return Err(ExtraSupField);
}
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// read arcs
let mut arcmap = vec![vec![]; ncom];
let mut cbase = vec![dvec![]; ncom];
// lhs nonzeros
let mut lhsidx = vec![vec![vec![]; ncom]; ncaps];
{
let mut f = File::open(&format!("{}.arc", basename))?;
buffer.clear();
f.read_to_string(&mut buffer)?;
}
for line in buffer.lines() {
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// read arcs
let mut arcmap = vec![vec![]; ncom];
let mut cbase = vec![dvec![]; ncom];
// lhs nonzeros
let mut lhsidx = vec![vec![vec![]; ncom]; ncaps];
for line in File::open(&format!("{}.arc", basename)).map(BufReader::new)?.lines() {
let line = line?;
let mut data = line.split_whitespace();
let arc = data.next().ok_or(MissingArcField("arc"))?.parse::<usize>()?;
let src = data.next().ok_or(MissingArcField("src"))?.parse::<usize>()?;
let snk = data.next().ok_or(MissingArcField("snk"))?.parse::<usize>()?;
let com = data.next().ok_or(MissingArcField("com"))?.parse::<usize>()?;
let cost = data.next().ok_or(MissingArcField("cost"))?.parse::<Real>()?;
let cap = data.next().ok_or(MissingArcField("cap"))?.parse::<Real>()?;
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// add to mutual capacity constraint
if mt > 0 {
lhsidx[(mt - 1) as usize][com].push(coeff);
}
}
// read rhs of coupling constraints
{
let mut f = File::open(&format!("{}.mut", basename))?;
buffer.clear();
f.read_to_string(&mut buffer)?;
}
for line in buffer.lines() {
let mut data = line.split_whitespace();
let mt = data.next().ok_or(MissingMutField("mt"))?.parse::<usize>()?;
let cap = data.next().ok_or(MissingMutField("cap"))?.parse::<Real>()?;
if data.next().is_some() {
return Err(ExtraMutField);
}
if mt < 1 || mt > ncaps {
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// add to mutual capacity constraint
if mt > 0 {
lhsidx[(mt - 1) as usize][com].push(coeff);
}
}
// read rhs of coupling constraints
let mut rhs = dvec![0.0; ncaps];
for line in File::open(&format!("{}.mut", basename)).map(BufReader::new)?.lines() {
let line = line?;
let mut data = line.split_whitespace();
let mt = data.next().ok_or(MissingMutField("mt"))?.parse::<usize>()?;
let cap = data.next().ok_or(MissingMutField("cap"))?.parse::<Real>()?;
if data.next().is_some() {
return Err(ExtraMutField);
}
if mt < 1 || mt > ncaps {
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