Merge pull request #38 from dtolnay/nopanic
Add no-panic feature to confirm no panicking codepaths
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commit
29aa8d782b
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@ -30,6 +30,8 @@ jobs:
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- run: cargo build --no-default-features
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- run: cargo test --tests --no-default-features
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- run: cargo test --tests --no-default-features --release
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- run: cargo build --tests --features no-panic --release
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if: matrix.rust == 'nightly'
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- run: cargo bench --no-run
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if: matrix.rust == 'nightly'
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@ -12,5 +12,8 @@ license = "MIT OR Apache-2.0"
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repository = "https://github.com/dtolnay/itoa"
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rust-version = "1.36"
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[dependencies]
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no-panic = { version = "0.1", optional = true }
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[package.metadata.docs.rs]
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targets = ["x86_64-unknown-linux-gnu"]
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@ -43,6 +43,8 @@ mod udiv128;
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use core::mem::{self, MaybeUninit};
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use core::{ptr, slice, str};
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#[cfg(feature = "no-panic")]
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use no_panic::no_panic;
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/// A correctly sized stack allocation for the formatted integer to be written
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/// into.
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@ -76,6 +78,7 @@ impl Buffer {
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/// This is a cheap operation; you don't need to worry about reusing buffers
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/// for efficiency.
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#[inline]
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#[cfg_attr(feature = "no-panic", no_panic)]
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pub fn new() -> Buffer {
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let bytes = [MaybeUninit::<u8>::uninit(); I128_MAX_LEN];
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Buffer { bytes }
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@ -83,6 +86,7 @@ impl Buffer {
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/// Print an integer into this buffer and return a reference to its string
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/// representation within the buffer.
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#[cfg_attr(feature = "no-panic", no_panic)]
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pub fn format<I: Integer>(&mut self, i: I) -> &str {
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i.write(unsafe {
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&mut *(&mut self.bytes as *mut [MaybeUninit<u8>; I128_MAX_LEN]
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@ -122,6 +126,7 @@ macro_rules! impl_Integer {
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#[allow(unused_comparisons)]
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#[inline]
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#[cfg_attr(feature = "no-panic", no_panic)]
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fn write(self, buf: &mut [MaybeUninit<u8>; $max_len]) -> &str {
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let is_nonnegative = self >= 0;
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let mut n = if is_nonnegative {
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@ -223,6 +228,7 @@ macro_rules! impl_Integer128 {
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#[allow(unused_comparisons)]
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#[inline]
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#[cfg_attr(feature = "no-panic", no_panic)]
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fn write(self, buf: &mut [MaybeUninit<u8>; $max_len]) -> &str {
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let is_nonnegative = self >= 0;
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let n = if is_nonnegative {
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@ -1,5 +1,9 @@
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#[cfg(feature = "no-panic")]
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use no_panic::no_panic;
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/// Multiply unsigned 128 bit integers, return upper 128 bits of the result
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#[inline]
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#[cfg_attr(feature = "no-panic", no_panic)]
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fn u128_mulhi(x: u128, y: u128) -> u128 {
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let x_lo = x as u64;
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let x_hi = (x >> 64) as u64;
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@ -26,6 +30,7 @@ fn u128_mulhi(x: u128, y: u128) -> u128 {
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/// Implementation, 1994, pp. 61–72
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///
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#[inline]
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#[cfg_attr(feature = "no-panic", no_panic)]
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pub fn udivmod_1e19(n: u128) -> (u128, u64) {
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let d = 10_000_000_000_000_000_000_u64; // 10^19
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