155 lines
3.4 KiB
Rust
155 lines
3.4 KiB
Rust
// xfail-pretty
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// xfail-test
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use std::cast::transmute;
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use std::libc::{STDOUT_FILENO, c_int, fdopen, fgets, fopen, fputc, fwrite};
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use std::libc::{size_t};
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use std::ptr::null;
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use std::vec::{capacity, reserve, reserve_at_least};
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use std::vec::raw::set_len;
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static LINE_LEN: u32 = 80;
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static COMPLEMENTS: [u8, ..256] = [
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0,
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'T' as u8,
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'V' as u8,
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'G' as u8,
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'H' as u8,
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0,
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0,
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'C' as u8,
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'D' as u8,
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0,
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0,
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'M' as u8,
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0,
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'K' as u8,
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'N' as u8,
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0,
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0,
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0,
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'Y' as u8,
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'S' as u8,
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'A' as u8,
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'A' as u8,
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'B' as u8,
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'W' as u8,
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0,
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'R' as u8,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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'T' as u8,
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'V' as u8,
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'G' as u8,
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'H' as u8,
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0,
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0,
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'C' as u8,
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'D' as u8,
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0,
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0,
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'M' as u8,
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0,
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'K' as u8,
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'N' as u8,
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0,
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0,
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0,
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'Y' as u8,
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'S' as u8,
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'A' as u8,
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'A' as u8,
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'B' as u8,
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'W' as u8,
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0,
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'R' as u8,
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0,
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0,
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0,
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0,
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0,
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0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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];
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#[fixed_stack_segment]
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fn main() {
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unsafe {
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let mode = "r";
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//let stdin = fdopen(STDIN_FILENO as c_int, transmute(&mode[0]));
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let path = "reversecomplement-input.txt";
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let stdin = fopen(transmute(&path[0]), transmute(&mode[0]));
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let mode = "w";
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let stdout = fdopen(STDOUT_FILENO as c_int, transmute(&mode[0]));
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let mut out: ~[u8] = ~[];
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reserve(&mut out, 12777888);
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let mut pos = 0;
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loop {
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let needed = pos + (LINE_LEN as uint) + 1;
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if capacity(&out) < needed {
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reserve_at_least(&mut out, needed);
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}
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let mut ptr = out.unsafe_mut_ref(pos);
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if fgets(transmute(ptr), LINE_LEN as c_int, stdin) == null() {
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break;
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}
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// Don't change lines that begin with '>' or ';'.
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let first = *ptr;
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if first == ('>' as u8) {
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while *ptr != 0 {
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ptr = ptr.offset(1);
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}
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*ptr = '\n' as u8;
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pos = (ptr as uint) - (out.unsafe_ref(0) as uint);
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fwrite(transmute(out.unsafe_ref(0)),
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1,
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pos as size_t,
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stdout);
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pos = 0;
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loop;
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}
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// Complement other lines.
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loop {
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let ch = *ptr;
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if ch == 0 {
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break;
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}
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*ptr = COMPLEMENTS.unsafe_get(ch as uint);
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ptr = ptr.offset(1);
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}
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*ptr = '\n' as u8;
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pos = (ptr as uint) - (out.unsafe_ref(0) as uint);
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}
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fwrite(transmute(out.unsafe_ref(0)), 1, pos as size_t, stdout);
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}
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}
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