Add CI

.github/workflows/build.yml

@@ -0,0 +1,111 @@
+on:
+  push:
+    branches: [ staging, trying, master ]
+  pull_request:
+
+name: Build
+
+#env:
+#  RUSTFLAGS: '--deny warnings' # clippy generates warnings at the moment
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: '--deny warnings'
+    strategy:
+      matrix:
+        rust: [stable]
+        TARGET:
+          - x86_64-unknown-linux-gnu
+          - x86_64-unknown-linux-musl
+          - arm-unknown-linux-gnueabi # Raspberry Pi 1
+          - armv7-unknown-linux-gnueabihf # Raspberry Pi 2, 3, etc
+          # Bare metal
+          - thumbv6m-none-eabi
+          - thumbv7em-none-eabi
+          - thumbv7em-none-eabihf
+          - thumbv7m-none-eabi
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.TARGET }}
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: build
+          args: --target=${{ matrix.TARGET }}
+
+  test:
+    name: Tests
+    env:
+      RUSTFLAGS: '--deny warnings'
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust: [stable, beta]
+        TARGET: [x86_64-unknown-linux-gnu]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.TARGET }}
+          override: true
+
+      - name: Test
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: test
+          args: --target=${{ matrix.TARGET }}
+
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: doc
+
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: 1.64.0 # clippy is too much of a moving target at the moment
+          override: true
+          components: clippy
+      - uses: actions-rs/clippy-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}

build.rs

@@ -5,6 +5,7 @@ fn main() {
 	cc::Build::new()
 		.warnings(true)
 		.extra_warnings(true)
+		.flag("-std=c99")
 		.file("./src/snprintf.c")
 		.compile("clocal");
 }

src/strcpy.rs

@@ -7,42 +7,39 @@ use crate::CChar;
 /// Rust implementation of C library function `strcpy`. Passing NULL
 /// (core::ptr::null()) gives undefined behaviour.
 #[no_mangle]
-pub unsafe extern "C" fn strcpy(
-    dest: *mut CChar,
-    src: *const CChar,
-) -> *const CChar {
-    let mut i = 0;
-    loop {
-        *dest.offset(i) = *src.offset(i);
-        let c = *dest.offset(i);
-        if c == 0 {
-            break;
-        }
-        i += 1;
-    }
-    dest
+pub unsafe extern "C" fn strcpy(dest: *mut CChar, src: *const CChar) -> *const CChar {
+	let mut i = 0;
+	loop {
+		*dest.offset(i) = *src.offset(i);
+		let c = *dest.offset(i);
+		if c == 0 {
+			break;
+		}
+		i += 1;
+	}
+	dest
 }
 
 #[cfg(test)]
 mod test {
-    use super::*;
+	use super::*;
 
-    #[test]
-    fn short() {
-        let src = b"hi\0";
-        let mut dest = *b"abcdef"; // no null terminator
-        let result = unsafe { strcpy(dest.as_mut_ptr(), src.as_ptr()) };
-        assert_eq!(
-            unsafe { core::slice::from_raw_parts(result, 5) },
-            *b"hi\0de"
-        );
-    }
+	#[test]
+	fn short() {
+		let src = b"hi\0";
+		let mut dest = *b"abcdef"; // no null terminator
+		let result = unsafe { strcpy(dest.as_mut_ptr(), src.as_ptr()) };
+		assert_eq!(
+			unsafe { core::slice::from_raw_parts(result, 5) },
+			*b"hi\0de"
+		);
+	}
 
-    #[test]
-    fn two() {
-        let src = b"hi\0";
-        let mut dest = [0u8; 2]; // no space for null terminator
-        let result = unsafe { strcpy(dest.as_mut_ptr(), src.as_ptr()) };
-        assert_eq!(unsafe { core::slice::from_raw_parts(result, 2) }, b"hi");
-    }
+	#[test]
+	fn two() {
+		let src = b"hi\0";
+		let mut dest = [0u8; 2]; // no space for null terminator
+		let result = unsafe { strcpy(dest.as_mut_ptr(), src.as_ptr()) };
+		assert_eq!(unsafe { core::slice::from_raw_parts(result, 2) }, b"hi");
+	}
 }

src/strtoul.rs

@@ -3,7 +3,7 @@
 //! Copyright (c) Jonathan 'theJPster' Pallant 2019
 //! Licensed under the Blue Oak Model Licence 1.0.0
 
-use crate::{CChar, CULong, CStringIter};
+use crate::{CChar, CStringIter, CULong};
 
 /// Rust implementation of C library function `strtoul`.
 ///
@@ -13,56 +13,55 @@ use crate::{CChar, CULong, CStringIter};
 /// function returns zero.
 #[no_mangle]
 pub unsafe extern "C" fn strtoul(s: *const CChar) -> CULong {
-    let mut result: CULong = 0;
-    for c in CStringIter::new(s) {
-        if c >= b'0' && c <= b'9' {
-            result *= 10;
-            result += (c - b'0') as CULong;
-        } else {
-            break;
-        }
-    }
-    result
+	let mut result: CULong = 0;
+	for c in CStringIter::new(s) {
+		if c >= b'0' && c <= b'9' {
+			result *= 10;
+			result += (c - b'0') as CULong;
+		} else {
+			break;
+		}
+	}
+	result
 }
 
 #[cfg(test)]
 mod test {
-    use super::strtoul;
+	use super::strtoul;
 
-    #[test]
-    fn empty() {
-        let result = unsafe { strtoul(b"\0".as_ptr()) };
-        assert_eq!(result, 0);
-    }
+	#[test]
+	fn empty() {
+		let result = unsafe { strtoul(b"\0".as_ptr()) };
+		assert_eq!(result, 0);
+	}
 
-    #[test]
-    fn non_digit() {
-        let result = unsafe { strtoul(b"1234x\0".as_ptr()) };
-        assert_eq!(result, 1234);
-    }
+	#[test]
+	fn non_digit() {
+		let result = unsafe { strtoul(b"1234x\0".as_ptr()) };
+		assert_eq!(result, 1234);
+	}
 
-    #[test]
-    fn bad_number() {
-        let result = unsafe { strtoul(b"x\0".as_ptr()) };
-        assert_eq!(result, 0);
-    }
+	#[test]
+	fn bad_number() {
+		let result = unsafe { strtoul(b"x\0".as_ptr()) };
+		assert_eq!(result, 0);
+	}
 
-    #[test]
-    fn one() {
-        let result = unsafe { strtoul(b"1\0".as_ptr()) };
-        assert_eq!(result, 1);
-    }
+	#[test]
+	fn one() {
+		let result = unsafe { strtoul(b"1\0".as_ptr()) };
+		assert_eq!(result, 1);
+	}
 
-    #[test]
-    fn hundredish() {
-        let result = unsafe { strtoul(b"123\0".as_ptr()) };
-        assert_eq!(result, 123);
-    }
-
-    #[test]
-    fn big_long() {
-        let result = unsafe { strtoul(b"2147483647\0".as_ptr()) };
-        assert_eq!(result, 2147483647);
-    }
+	#[test]
+	fn hundredish() {
+		let result = unsafe { strtoul(b"123\0".as_ptr()) };
+		assert_eq!(result, 123);
+	}
 
+	#[test]
+	fn big_long() {
+		let result = unsafe { strtoul(b"2147483647\0".as_ptr()) };
+		assert_eq!(result, 2147483647);
+	}
 }