// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![macro_escape] #![doc(hidden)] macro_rules! int_module (($T:ty) => ( // String conversion functions and impl str -> num /// Parse a byte slice as a number in the given base /// /// Yields an `Option` because `buf` may or may not actually be parseable. /// /// # Examples /// /// ``` /// let num = std::i64::parse_bytes([49,50,51,52,53,54,55,56,57], 10); /// assert!(num == Some(123456789)); /// ``` #[inline] pub fn parse_bytes(buf: &[u8], radix: uint) -> Option<$T> { strconv::from_str_bytes_common(buf, radix, true, false, false, strconv::ExpNone, false, false) } impl FromStr for $T { #[inline] fn from_str(s: &str) -> Option<$T> { strconv::from_str_common(s, 10u, true, false, false, strconv::ExpNone, false, false) } } impl FromStrRadix for $T { #[inline] fn from_str_radix(s: &str, radix: uint) -> Option<$T> { strconv::from_str_common(s, radix, true, false, false, strconv::ExpNone, false, false) } } // String conversion functions and impl num -> str /// Convert to a string as a byte slice in a given base. /// /// Use in place of x.to_str() when you do not need to store the string permanently /// /// # Examples /// /// ``` /// std::int::to_str_bytes(123, 10, |v| { /// assert!(v == "123".as_bytes()); /// }); /// ``` #[inline] pub fn to_str_bytes(n: $T, radix: uint, f: |v: &[u8]| -> U) -> U { use io::{Writer, Seek}; // The radix can be as low as 2, so we need at least 64 characters for a // base 2 number, and then we need another for a possible '-' character. let mut buf = [0u8, ..65]; let amt = { let mut wr = ::io::BufWriter::new(buf); (write!(&mut wr, "{}", ::fmt::radix(n, radix as u8))).unwrap(); wr.tell().unwrap() as uint }; f(buf.slice(0, amt)) } impl ToStrRadix for $T { /// Convert to a string in a given base. #[inline] fn to_str_radix(&self, radix: uint) -> String { format_strbuf!("{}", ::fmt::radix(*self, radix as u8)) } } #[cfg(test)] mod tests { use prelude::*; use super::*; use i32; use num::ToStrRadix; use str::StrSlice; #[test] fn test_from_str() { assert_eq!(from_str::<$T>("0"), Some(0 as $T)); assert_eq!(from_str::<$T>("3"), Some(3 as $T)); assert_eq!(from_str::<$T>("10"), Some(10 as $T)); assert_eq!(from_str::("123456789"), Some(123456789 as i32)); assert_eq!(from_str::<$T>("00100"), Some(100 as $T)); assert_eq!(from_str::<$T>("-1"), Some(-1 as $T)); assert_eq!(from_str::<$T>("-3"), Some(-3 as $T)); assert_eq!(from_str::<$T>("-10"), Some(-10 as $T)); assert_eq!(from_str::("-123456789"), Some(-123456789 as i32)); assert_eq!(from_str::<$T>("-00100"), Some(-100 as $T)); assert!(from_str::<$T>(" ").is_none()); assert!(from_str::<$T>("x").is_none()); } #[test] fn test_parse_bytes() { use str::StrSlice; assert_eq!(parse_bytes("123".as_bytes(), 10u), Some(123 as $T)); assert_eq!(parse_bytes("1001".as_bytes(), 2u), Some(9 as $T)); assert_eq!(parse_bytes("123".as_bytes(), 8u), Some(83 as $T)); assert_eq!(i32::parse_bytes("123".as_bytes(), 16u), Some(291 as i32)); assert_eq!(i32::parse_bytes("ffff".as_bytes(), 16u), Some(65535 as i32)); assert_eq!(i32::parse_bytes("FFFF".as_bytes(), 16u), Some(65535 as i32)); assert_eq!(parse_bytes("z".as_bytes(), 36u), Some(35 as $T)); assert_eq!(parse_bytes("Z".as_bytes(), 36u), Some(35 as $T)); assert_eq!(parse_bytes("-123".as_bytes(), 10u), Some(-123 as $T)); assert_eq!(parse_bytes("-1001".as_bytes(), 2u), Some(-9 as $T)); assert_eq!(parse_bytes("-123".as_bytes(), 8u), Some(-83 as $T)); assert_eq!(i32::parse_bytes("-123".as_bytes(), 16u), Some(-291 as i32)); assert_eq!(i32::parse_bytes("-ffff".as_bytes(), 16u), Some(-65535 as i32)); assert_eq!(i32::parse_bytes("-FFFF".as_bytes(), 16u), Some(-65535 as i32)); assert_eq!(parse_bytes("-z".as_bytes(), 36u), Some(-35 as $T)); assert_eq!(parse_bytes("-Z".as_bytes(), 36u), Some(-35 as $T)); assert!(parse_bytes("Z".as_bytes(), 35u).is_none()); assert!(parse_bytes("-9".as_bytes(), 2u).is_none()); } #[test] fn test_to_str() { assert_eq!((0 as $T).to_str_radix(10u), "0".to_string()); assert_eq!((1 as $T).to_str_radix(10u), "1".to_string()); assert_eq!((-1 as $T).to_str_radix(10u), "-1".to_string()); assert_eq!((127 as $T).to_str_radix(16u), "7f".to_string()); assert_eq!((100 as $T).to_str_radix(10u), "100".to_string()); } #[test] fn test_int_to_str_overflow() { let mut i8_val: i8 = 127_i8; assert_eq!(i8_val.to_str(), "127".to_string()); i8_val += 1 as i8; assert_eq!(i8_val.to_str(), "-128".to_string()); let mut i16_val: i16 = 32_767_i16; assert_eq!(i16_val.to_str(), "32767".to_string()); i16_val += 1 as i16; assert_eq!(i16_val.to_str(), "-32768".to_string()); let mut i32_val: i32 = 2_147_483_647_i32; assert_eq!(i32_val.to_str(), "2147483647".to_string()); i32_val += 1 as i32; assert_eq!(i32_val.to_str(), "-2147483648".to_string()); let mut i64_val: i64 = 9_223_372_036_854_775_807_i64; assert_eq!(i64_val.to_str(), "9223372036854775807".to_string()); i64_val += 1 as i64; assert_eq!(i64_val.to_str(), "-9223372036854775808".to_string()); } #[test] fn test_int_from_str_overflow() { let mut i8_val: i8 = 127_i8; assert_eq!(from_str::("127"), Some(i8_val)); assert!(from_str::("128").is_none()); i8_val += 1 as i8; assert_eq!(from_str::("-128"), Some(i8_val)); assert!(from_str::("-129").is_none()); let mut i16_val: i16 = 32_767_i16; assert_eq!(from_str::("32767"), Some(i16_val)); assert!(from_str::("32768").is_none()); i16_val += 1 as i16; assert_eq!(from_str::("-32768"), Some(i16_val)); assert!(from_str::("-32769").is_none()); let mut i32_val: i32 = 2_147_483_647_i32; assert_eq!(from_str::("2147483647"), Some(i32_val)); assert!(from_str::("2147483648").is_none()); i32_val += 1 as i32; assert_eq!(from_str::("-2147483648"), Some(i32_val)); assert!(from_str::("-2147483649").is_none()); let mut i64_val: i64 = 9_223_372_036_854_775_807_i64; assert_eq!(from_str::("9223372036854775807"), Some(i64_val)); assert!(from_str::("9223372036854775808").is_none()); i64_val += 1 as i64; assert_eq!(from_str::("-9223372036854775808"), Some(i64_val)); assert!(from_str::("-9223372036854775809").is_none()); } } ))