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use crate::error::*;
use crate::structs::*;
use crate::validate;
use crate::StrictnessLevel;
use std::fs::File;
use std::io::prelude::*;
use std::io::BufWriter;
pub fn save_mmcif(pdb: PDB, filename: &str, level: StrictnessLevel) -> Result<(), Vec<PDBError>> {
let mut errors = validate(&pdb);
for error in &errors {
if error.fails(level) {
return Err(errors);
}
}
let file = match File::create(filename) {
Ok(f) => f,
Err(_e) => {
errors.push(PDBError::new(
ErrorLevel::BreakingError,
"Could not open file",
"Could not open the file for writing, make sure you have permission for this file and no other program is currently using it.",
Context::show(filename)
));
return Err(errors);
}
};
save_mmcif_raw(&pdb, BufWriter::new(file));
Ok(())
}
#[allow(clippy::unwrap_used)]
pub fn save_mmcif_raw<T: Write>(pdb: &PDB, mut sink: BufWriter<T>) {
macro_rules! write {
($($arg:tt)*) => {
sink.write_fmt(format_args!($($arg)*)).unwrap();
sink.write_all(b"\n").unwrap();
}
}
let empty = "?".to_string();
let name = pdb.identifier.as_ref().unwrap_or(&empty);
write!(
"data_{}
#
_entry.id {}
#
_audit_conform.dict_name mmcif_pdbx.dic
_audit_conform.dict_version 5.279
_audit_conform.dict_location http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic",
name,
name
);
if let Some(unit_cell) = &pdb.unit_cell {
write!(
"# Unit cell definition
_cell.entry_id {}
_cell.length_a {}
_cell.length_b {}
_cell.length_c {}
_cell.angle_alpha {}
_cell.angle_beta {}
_cell.angle_gamma {}
_cell.Z_PDB {}",
name,
unit_cell.a(),
unit_cell.b(),
unit_cell.c(),
unit_cell.alpha(),
unit_cell.beta(),
unit_cell.gamma(),
if let Some(symmetry) = &pdb.symmetry {
symmetry.z().to_string()
} else {
"?".to_owned()
}
);
}
if let Some(symmetry) = &pdb.symmetry {
write!(
"# Space group definition
_symmetry.entry_id {}
_symmetry.space_group_name_H-M '{}'
_symmetry.pdbx_full_space_group_name_H-M '{}'
_symmetry.Int_Tables_number {}",
name,
symmetry.herman_mauguin_symbol(),
symmetry.herman_mauguin_symbol(),
symmetry.index()
);
}
write!(
"loop_
_atom_site.group_PDB
_atom_site.id
_atom_site.type_symbol
_atom_site.label_atom_id
_atom_site.label_alt_id
_atom_site.label_comp_id
_atom_site.label_asym_id
_atom_site.label_entity_id
_atom_site.label_seq_id
_atom_site.pdbx_PDB_ins_code
_atom_site.Cartn_x
_atom_site.Cartn_y
_atom_site.Cartn_z
_atom_site.occupancy
_atom_site.B_iso_or_equiv
_atom_site.pdbx_formal_charge
_atom_site.pdbx_PDB_model_num"
);
let mut lines = Vec::new();
for model in pdb.models() {
let mut chain_index = 0;
for chain in model.chains() {
chain_index += 1;
for residue in chain.residues() {
for conformer in residue.conformers() {
for atom in conformer.atoms() {
lines.push(vec![
(if atom.hetero() { "HETATM" } else { "ATOM" }).to_string(),
atom.serial_number().to_string(),
atom.element().to_string(),
atom.name().to_string(),
conformer.alternative_location().unwrap_or(".").to_string(),
conformer.name().to_string(),
chain.id().to_string(),
chain_index.to_string(),
residue.serial_number().to_string(),
residue.insertion_code().unwrap_or(".").to_string(),
print_float(atom.x()),
print_float(atom.y()),
print_float(atom.z()),
print_float(atom.occupancy()),
print_float(atom.b_factor()),
atom.charge().to_string(),
model.serial_number().to_string(),
]);
}
}
}
}
}
let mut sizes = vec![1; lines[0].len()];
for line in &lines {
for index in 0..line.len() {
sizes[index] = std::cmp::max(sizes[index], line[index].len());
}
}
for line in lines {
let mut output = String::new();
output.push_str(&line[0]);
output.push_str(&" ".repeat(sizes[0] - line[0].len()));
for index in 1..line.len() {
output.push(' ');
if line[index].trim() != "" {
output.push_str(&line[index]);
output.push_str(&" ".repeat(sizes[index] - line[index].len()));
} else {
output.push('?');
output.push_str(&" ".repeat(sizes[index] - 1));
}
}
output.push('\n');
sink.write_all(output.as_bytes()).unwrap();
}
write!("#");
sink.flush().unwrap();
}
#[allow(clippy::cast_possible_truncation)]
fn print_float(num: f64) -> String {
let rounded = (num * 100000.).round() / 100000.;
if (rounded.round() - rounded).abs() < std::f64::EPSILON {
format!("{}.0", rounded.trunc() as isize)
} else {
format!("{}", rounded)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
#[allow(clippy::excessive_precision, clippy::print_literal)]
fn test_print_float() {
assert_eq!(print_float(1.), "1.0".to_string());
assert_eq!(print_float(128734.), "128734.0".to_string());
assert_eq!(print_float(0.1), "0.1".to_string());
assert_eq!(print_float(1.015), "1.015".to_string());
assert_eq!(print_float(2.015), "2.015".to_string());
assert_eq!(print_float(1.4235263), "1.42353".to_string());
println!("{}", 235617341053.235611341053);
assert_eq!(
print_float(235617341053.235611341053),
"235617341053.23563".to_string()
);
println!("{}", 23561753.235617341053);
assert_eq!(
print_float(23561753.235617341053),
"23561753.23562".to_string()
);
}
}