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#![feature(test)] #![feature(concat_idents)] extern crate test; enum Buffer {} enum BufferBytesIter {} enum BufferBytesRIter {} use std::ops::Add; use std::os::raw::{c_char, c_int, c_ulonglong}; use std::ffi::CString; extern "C" { fn buffer_new()->*mut Buffer; fn buffer_clone(buffer: *mut Buffer)->*mut Buffer; fn buffer_delete(buffer: *mut Buffer); fn buffer_push_back_byte(buffer: *mut Buffer, byte:c_char)->*mut Buffer; fn buffer_push_back_string(buffer: *mut Buffer, string:*const c_char)->*mut Buffer; fn buffer_push_front_byte(buffer: *mut Buffer, byte:c_char)->*mut Buffer; fn buffer_push_front_string(buffer: *mut Buffer, string:*const c_char)->*mut Buffer; fn buffer_insert_byte(buffer: *mut Buffer,index: c_ulonglong, byte:c_char)->*mut Buffer; fn buffer_insert_string(buffer: *mut Buffer,index: c_ulonglong, string:*const c_char)->*mut Buffer; fn buffer_delete_byte(buffer: *mut Buffer, index: c_ulonglong)->*mut Buffer; fn buffer_delete_range(buffer: *mut Buffer, start: c_ulonglong, end: c_ulonglong)->*mut Buffer; fn buffer_concat(left: *mut Buffer, right: *mut Buffer)->*mut Buffer; fn buffer_get_size(buffer: *mut Buffer)->c_ulonglong; fn buffer_iter_delete(iter: *mut BufferBytesIter); fn buffer_get_iter(buffer: *mut Buffer)->*mut BufferBytesIter; fn buffer_iter_has_next(iter: *mut BufferBytesIter)->c_int; fn buffer_iter_next(iter: *mut BufferBytesIter)->c_char; fn buffer_riter_delete(iter: *mut BufferBytesRIter); fn buffer_get_riter(buffer: *mut Buffer)->*mut BufferBytesRIter; fn buffer_riter_has_next(iter: *mut BufferBytesRIter)->c_int; fn buffer_riter_next(iter: *mut BufferBytesRIter)->c_char; } pub struct FlexVector{ buf: *mut Buffer, } impl FlexVector{ pub fn new() -> FlexVector{ unsafe{ return FlexVector{ buf: buffer_new(), } } } pub fn len(&self)->usize{ unsafe{ return buffer_get_size(self.buf) as usize; } } pub fn push_back(&self, elem: u8)->FlexVector{ unsafe{ return FlexVector{ buf: buffer_push_back_byte(self.buf, elem as c_char), } } } pub fn push_back_char(&self, elem: char)->FlexVector{ let mut b = [0; 4]; return self.push_back_string(elem.encode_utf8(&mut b)); } pub fn push_back_string(&self, string: &str)->FlexVector{ unsafe{ return FlexVector{ buf: buffer_push_back_string(self.buf, CString::new(string).unwrap().as_ptr()), } } } pub fn push_front(&self, elem: u8)->FlexVector{ unsafe{ return FlexVector{ buf: buffer_push_front_byte(self.buf, elem as c_char), } } } pub fn push_front_char(&self, elem: char)->FlexVector{ let mut b = [0; 4]; return self.push_front_string(elem.encode_utf8(&mut b)); } pub fn push_front_string(&self, string: &str)->FlexVector{ unsafe{ return FlexVector{ buf: buffer_push_front_string(self.buf, CString::new(string).unwrap().as_ptr()), } } } pub fn insert(&self, index: usize, elem: u8)->Option<FlexVector>{ unsafe{ if index>self.len(){ None }else{ Some(FlexVector{ buf: buffer_insert_byte(self.buf, index as c_ulonglong, elem as c_char), }) } } } pub fn insert_char(&self, index: usize, elem: char)->Option<FlexVector>{ let mut b = [0; 4]; return self.insert_string(index, elem.encode_utf8(&mut b)); } pub fn insert_string(&self, index: usize, string: &str)->Option<FlexVector>{ unsafe{ if index>self.len(){ None }else{ Some(FlexVector{ buf: buffer_insert_string(self.buf, index as c_ulonglong, CString::new(string).unwrap().as_ptr()), }) } } } pub fn delete(&self, index: usize)->Option<FlexVector>{ unsafe{ if index>=self.len(){ None }else{ Some(FlexVector{ buf: buffer_delete_byte(self.buf, index as c_ulonglong), }) } } } pub fn delete_range(&self, start: usize, end: usize)->Option<FlexVector>{ unsafe{ if start>=end || end>self.len(){ None }else{ Some(FlexVector{ buf: buffer_delete_range(self.buf, start as c_ulonglong, end as c_ulonglong), }) } } } pub fn concat(&self, other: &FlexVector) -> FlexVector{ unsafe{ return FlexVector{ buf: buffer_concat(self.buf, other.buf), } } } pub fn bytes(&self)->FlexVectorIter{ return FlexVectorIter::new(self); } pub fn reverse_bytes(&self)->FlexVectorRIter{ return FlexVectorRIter::new(self); } } impl Add for FlexVector{ type Output = FlexVector; fn add(self, other: FlexVector) -> Self::Output{ return self.concat(&other); } } impl <'a, 'b> Add<&'a FlexVector> for &'b FlexVector{ type Output = FlexVector; fn add(self, other: &FlexVector) -> Self::Output{ return self.concat(&other); } } impl <'a> Add<&'a FlexVector> for FlexVector{ type Output = FlexVector; fn add(self, other: &FlexVector) -> Self::Output{ return self.concat(&other); } } impl Clone for FlexVector{ fn clone(&self)->FlexVector{ unsafe{ return FlexVector{ buf: buffer_clone(self.buf), } } } } impl Drop for FlexVector{ fn drop(&mut self){ unsafe{ buffer_delete(self.buf); } } } pub struct FlexVectorIter{ iter: *mut BufferBytesIter, } impl FlexVectorIter{ fn new(vec: &FlexVector)->FlexVectorIter{ unsafe{ return FlexVectorIter{ iter: buffer_get_iter(vec.buf), } } } } impl Drop for FlexVectorIter{ fn drop(&mut self){ unsafe{ buffer_iter_delete(self.iter); } } } impl Iterator for FlexVectorIter{ type Item = u8; fn next(&mut self)->Option<Self::Item>{ unsafe{ match buffer_iter_has_next(self.iter){ 0=>None, _=>Some(buffer_iter_next(self.iter) as u8), } } } } pub struct FlexVectorRIter{ iter: *mut BufferBytesRIter, } impl FlexVectorRIter{ fn new(vec: &FlexVector)->FlexVectorRIter{ unsafe{ return FlexVectorRIter{ iter: buffer_get_riter(vec.buf), } } } } impl Drop for FlexVectorRIter{ fn drop(&mut self){ unsafe{ buffer_riter_delete(self.iter); } } } impl Iterator for FlexVectorRIter{ type Item = u8; fn next(&mut self)->Option<Self::Item>{ unsafe{ match buffer_riter_has_next(self.iter){ 0=>None, _=>Some(buffer_riter_next(self.iter) as u8), } } } } #[cfg(test)] mod tests { use super::*; use std::str::from_utf8; use test::Bencher; macro_rules! assert_vec_eq { ($left:expr, $right:expr)=> ({ let _b: Vec<u8> = ($left).bytes().collect(); assert_eq!(from_utf8(_b.as_slice()).unwrap(), $right); }) } macro_rules! bench_magnitude_push_back { ($name1:ident, $name2:ident, $magnitude:expr) =>( #[bench] fn $name1(b: &mut Bencher){ b.iter(||{ let mut flex = FlexVector::new(); for _ in 0..($magnitude){ flex = flex.push_back(65);; } }); } #[bench] fn $name2(b: &mut Bencher){ let s = "A".repeat($magnitude); let s2 = s.as_str(); b.iter(||{ FlexVector::new().push_back_string(s2); }); } ) } macro_rules! bench_magnitude_push_front { ($name1:ident, $name2:ident, $magnitude:expr) =>( #[bench] fn $name1(b: &mut Bencher){ b.iter(||{ let mut flex = FlexVector::new(); for _ in 0..($magnitude){ flex = flex.push_front(65);; } }); } #[bench] fn $name2(b: &mut Bencher){ let s = "A".repeat($magnitude); let s2 = s.as_str(); b.iter(||{ FlexVector::new().push_front_string(s2); }); } ) } macro_rules! bench_magnitude_insert { ($name1:ident, $name2:ident, $mag1:expr, $mag2:expr) =>( #[bench] fn $name1(b: &mut Bencher){ let s = "A".repeat($mag1); let s2 = s.as_str(); let flex = FlexVector::new().push_back_string(s2); b.iter(||{ let mut flex = flex.clone(); for i in 0..($mag2){ flex = flex.insert($mag1/2+i as usize, 65).unwrap(); } }); } #[bench] fn $name2(b: &mut Bencher){ let s = "A".repeat($mag1); let t = "A".repeat($mag2); let s2 = s.as_str(); let t2 = t.as_str(); let flex = FlexVector::new().push_back_string(s2); b.iter(||{ flex.insert_string($mag1/2, t2); }); } ) } #[test] fn push_back_test(){ let vec1 = FlexVector::new(); let vec2 = vec1.push_back(65); let vec3 = vec2.push_back_char('B'); let vec4 = vec3.push_back_string("CD"); assert_vec_eq!(vec1, ""); assert_vec_eq!(vec2, "A"); assert_vec_eq!(vec3, "AB"); assert_vec_eq!(vec4, "ABCD"); } #[test] fn push_front_test(){ let vec1 = FlexVector::new(); let vec2 = vec1.push_front(65); let vec3 = vec2.push_front_char('B'); let vec4 = vec3.push_front_string("CD"); assert_vec_eq!(vec1, ""); assert_vec_eq!(vec2, "A"); assert_vec_eq!(vec3, "BA"); assert_vec_eq!(vec4, "CDBA"); } #[test] fn insert_test(){ let vec1 = FlexVector::new().push_back_string("ABCDEFGHIJKLMNOP"); let vec2 = vec1.insert(0, 65).unwrap(); let vec3 = vec2.insert_char(3, 'C').unwrap(); let vec4 = vec3.insert_string(9, "XYZ").unwrap(); assert_vec_eq!(vec1, "ABCDEFGHIJKLMNOP"); assert_vec_eq!(vec2, "AABCDEFGHIJKLMNOP"); assert_vec_eq!(vec3, "AABCCDEFGHIJKLMNOP"); assert_vec_eq!(vec4, "AABCCDEFGXYZHIJKLMNOP"); } #[test] fn delete_test(){ let vec1 = FlexVector::new().push_back_string("ABCDEFGHIJKLMNOP"); let vec2 = vec1.delete(15).unwrap(); let vec3 = vec1.delete_range(2,4).unwrap(); let vec4 = vec1.delete_range(14,16).unwrap(); let vec5 = vec1.delete_range(0,1).unwrap(); let vec6 = vec1.delete_range(0,16).unwrap(); assert_vec_eq!(vec2, "ABCDEFGHIJKLMNO"); assert_vec_eq!(vec3, "ABEFGHIJKLMNOP"); assert_vec_eq!(vec4, "ABCDEFGHIJKLMN"); assert_vec_eq!(vec5, "BCDEFGHIJKLMNOP"); assert_vec_eq!(vec6, ""); } bench_magnitude_push_back!(bench_push_back_byte_1, bench_push_back_string_1, 1); bench_magnitude_push_back!(bench_push_back_byte_10, bench_push_back_string_10, 10); bench_magnitude_push_back!(bench_push_back_byte_100, bench_push_back_string_100, 100); bench_magnitude_push_back!(bench_push_back_byte_1000, bench_push_back_string_1000, 1000); bench_magnitude_push_back!(bench_push_back_byte_10000, bench_push_back_string_10000, 10000); bench_magnitude_push_front!(bench_push_front_byte_1, bench_push_front_string_1, 1); bench_magnitude_push_front!(bench_push_front_byte_10, bench_push_front_string_10, 10); bench_magnitude_push_front!(bench_push_front_byte_100, bench_push_front_string_100, 100); bench_magnitude_push_front!(bench_push_front_byte_1000, bench_push_front_string_1000, 1000); bench_magnitude_push_front!(bench_push_front_byte_10000, bench_push_front_string_10000, 10000); bench_magnitude_insert!(bench_insert_byte_1_1, bench_insert_string_1_1, 1, 1); bench_magnitude_insert!(bench_insert_byte_1_10, bench_insert_string_1_10, 1, 10); bench_magnitude_insert!(bench_insert_byte_1_100, bench_insert_string_1_100, 1, 100); bench_magnitude_insert!(bench_insert_byte_1_1000, bench_insert_string_1_1000, 1, 1000); bench_magnitude_insert!(bench_insert_byte_1_10000, bench_insert_string_1_10000, 1, 10000); bench_magnitude_insert!(bench_insert_byte_10_1, bench_insert_string_10_1, 10, 1); bench_magnitude_insert!(bench_insert_byte_10_10, bench_insert_string_10_10, 10, 10); bench_magnitude_insert!(bench_insert_byte_10_100, bench_insert_string_10_100, 10, 100); bench_magnitude_insert!(bench_insert_byte_10_1000, bench_insert_string_10_1000, 10, 1000); bench_magnitude_insert!(bench_insert_byte_10_10000, bench_insert_string_10_10000, 10, 10000); bench_magnitude_insert!(bench_insert_byte_100_1, bench_insert_string_100_1, 100, 1); bench_magnitude_insert!(bench_insert_byte_100_10, bench_insert_string_100_10, 100, 10); bench_magnitude_insert!(bench_insert_byte_100_100, bench_insert_string_100_100, 100, 100); bench_magnitude_insert!(bench_insert_byte_100_1000, bench_insert_string_100_1000, 100, 1000); bench_magnitude_insert!(bench_insert_byte_100_10000, bench_insert_string_100_10000, 100, 10000); bench_magnitude_insert!(bench_insert_byte_1000_1, bench_insert_string_1000_1, 1000, 1); bench_magnitude_insert!(bench_insert_byte_1000_10, bench_insert_string_1000_10, 1000, 10); bench_magnitude_insert!(bench_insert_byte_1000_100, bench_insert_string_1000_100, 1000, 100); bench_magnitude_insert!(bench_insert_byte_1000_1000, bench_insert_string_1000_1000, 1000, 1000); bench_magnitude_insert!(bench_insert_byte_1000_10000, bench_insert_string_1000_10000, 1000, 10000); bench_magnitude_insert!(bench_insert_byte_10000_1, bench_insert_string_10000_1, 10000, 1); bench_magnitude_insert!(bench_insert_byte_10000_10, bench_insert_string_10000_10, 10000, 10); bench_magnitude_insert!(bench_insert_byte_10000_100, bench_insert_string_10000_100, 10000, 100); bench_magnitude_insert!(bench_insert_byte_10000_1000, bench_insert_string_10000_1000, 10000, 1000); bench_magnitude_insert!(bench_insert_byte_10000_10000, bench_insert_string_10000_10000, 10000, 10000); }