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use std::fs::File; use std::fs::OpenOptions; use std::io::{Read, Write}; use std::path::Path; use std::convert::AsRef; use std::option::Option; use std::fmt::Arguments; pub fn read<P: AsRef<Path>>(src:P) -> Option<Vec<u8>> { return match File::open(src) { Ok(mut file) => { let mut data = Vec::new(); if let Ok(m) = file.metadata() { data.reserve(m.len() as usize); } file.read_to_end(&mut data); Option::Some(data) } Err(_) => Option::None, }; } pub fn read_text<P: AsRef<Path>>(src:P) -> Option<String> { return match File::open(src) { Ok(mut file) => { let mut content = String::new(); file.read_to_string(&mut content); Option::Some(content) } Err(_) => Option::None, }; } pub fn read_delim<P: AsRef<Path>>(src:P, d:char) -> Option<Vec<String>> { return match File::open(src) { Ok(mut file) => { let mut content = String::new(); file.read_to_string(&mut content); Option::Some(content.split(d).map(|s| s.to_string()).collect()) } Err(_) => Option::None, }; } pub fn read_lines<P: AsRef<Path>>(src:P) -> Option<Vec<String>> { self::read_delim(src, '\n') } pub fn read_words<P: AsRef<Path>>(src:P) -> Option<Vec<String>> { return match File::open(src) { Ok(mut file) => { let mut content = String::new(); file.read_to_string(&mut content); Option::Some(content.split(&['\n', ' '][..]).map(|s| s.to_string()).collect()) } Err(_) => Option::None, }; } pub fn write<P: AsRef<Path>, B: AsRef<[u8]>>(src:P, data:B, trunc:bool) -> Option<usize> { return match OpenOptions::new().write(true) .truncate(trunc) .append(!trunc) .create(true) .open(src) { Ok(mut file) => match file.write(data.as_ref()) { Ok(n) => Option::Some(n), Err(_) => Option::Some(0), } Err(_) => Option::None, }; } pub fn write_text<P: AsRef<Path>, S: AsRef<str>>(src:P, text:S, trunc:bool) -> Option<usize> { self::write(src, text.as_ref().as_bytes(), trunc) } pub fn write_lines<P: AsRef<Path>>(src:P, lines:Vec<String>, trunc:bool) -> Option<usize> { self::write_text(src, lines.join("\r\n"), trunc) } pub fn write_fmt<P: AsRef<Path>>(src:P, fmt:Arguments, trunc:bool) -> bool { return match OpenOptions::new().write(true) .truncate(trunc) .append(!trunc) .create(true) .open(src) { Ok(mut file) => match file.write_fmt(fmt) { _ => true, } Err(_) => false, }; } pub fn write_newline<P: AsRef<Path>>(src:P) -> bool { return match self::write_text(src, "\r\n", false) { Some(_) => true, None => false, } } pub fn contains<P: AsRef<Path>, S: AsRef<str>>(src:P, pat:S) -> Option<bool> { return match self::read_text(src) { Some(s) => Option::Some(s.contains(pat.as_ref())), None => Option::None, } } pub fn merge<P: AsRef<Path>>(src1:P, src2:P) -> bool { match self::read_text(src2) { Some(s) => match self::write_text(src1, s, false) { Some(_) => true, None => false, } None => false, } }