From 29ad5b75c9d1940651a9643159fe79f2fd27a8c0 Mon Sep 17 00:00:00 2001
From: jD91mZM2 <me@krake.one>
Date: Mon, 29 Jun 2020 21:03:29 +0200
Subject: [PATCH] Fix broken CVec
Oops, forgot to initiate the pointer after uses of CVec::new()
---
src/c_vec.rs | 70 +++++++++++++++++++++++++++---
tests/expected/stdio/printf.stdout | 4 ++
tests/stdio/printf.c | 12 +++++
tests/verify.sh | 1 -
4 files changed, 81 insertions(+), 6 deletions(-)
diff --git a/src/c_vec.rs b/src/c_vec.rs
index fea7aefff..f1d1c0f93 100644
--- a/src/c_vec.rs
+++ b/src/c_vec.rs
@@ -57,8 +57,13 @@ impl<T> CVec<T> {
}
unsafe fn resize(&mut self, cap: usize) -> Result<(), AllocError> {
let size = Self::check_mul(cap, mem::size_of::<T>())?;
- let ptr = NonNull::new(platform::realloc(self.ptr.as_ptr() as *mut c_void, size) as *mut T)
- .ok_or(AllocError)?;
+ let ptr = if cap == 0 {
+ NonNull::dangling()
+ } else if self.cap > 0 {
+ NonNull::new(platform::realloc(self.ptr.as_ptr() as *mut c_void, size) as *mut T).ok_or(AllocError)?
+ } else {
+ NonNull::new((platform::alloc(size)) as *mut T).ok_or(AllocError)?
+ };
self.ptr = ptr;
self.cap = cap;
Ok(())
@@ -75,13 +80,13 @@ impl<T> CVec<T> {
// Push stuff
pub fn reserve(&mut self, required: usize) -> Result<(), AllocError> {
- let reserved_len = self
+ let required_len = self
.len
.checked_add(required)
.ok_or(AllocError)
.and_then(Self::check_bounds)?;
- let new_cap = cmp::min(reserved_len.next_power_of_two(), core::isize::MAX as usize);
- if new_cap > self.cap {
+ if required_len > self.cap {
+ let new_cap = cmp::min(required_len.next_power_of_two(), core::isize::MAX as usize);
unsafe {
self.resize(new_cap)?;
}
@@ -225,3 +230,58 @@ impl WriteByte for CVec<u8> {
Ok(())
}
}
+
+#[cfg(test)]
+mod tests {
+ use super::CVec;
+
+ #[test]
+ fn push_pop() {
+ let mut vec = CVec::new();
+ vec.push(1).unwrap();
+ vec.push(2).unwrap();
+ vec.push(3).unwrap();
+ assert_eq!(&vec[..], &[1, 2, 3]);
+ assert_eq!(vec.pop().unwrap(), 3);
+ assert_eq!(&vec[..], &[1, 2]);
+ }
+ #[test]
+ fn extend_from_slice() {
+ use core_io::Write;
+
+ let mut vec = CVec::new();
+ vec.extend_from_slice(&[1, 2, 3]).unwrap();
+ vec.extend_from_slice(&[4, 5, 6]).unwrap();
+ assert_eq!(&vec[..], &[1, 2, 3, 4, 5, 6]);
+ assert_eq!(vec.write(&[7, 8, 9]).unwrap(), 3);
+ assert_eq!(&vec[..], &[1, 2, 3, 4, 5, 6, 7, 8, 9]);
+ }
+ #[test]
+ fn dropped() {
+ use alloc::rc::Rc;
+
+ let counter = Rc::new(());
+ let mut vec = CVec::with_capacity(3).unwrap();
+ vec.push(Rc::clone(&counter)).unwrap();
+ vec.push(Rc::clone(&counter)).unwrap();
+ vec.push(Rc::clone(&counter)).unwrap();
+ assert_eq!(Rc::strong_count(&counter), 4);
+
+ let popped = vec.pop().unwrap();
+ assert_eq!(Rc::strong_count(&counter), 4);
+ drop(popped);
+ assert_eq!(Rc::strong_count(&counter), 3);
+
+ vec.push(Rc::clone(&counter)).unwrap();
+ vec.push(Rc::clone(&counter)).unwrap();
+ vec.push(Rc::clone(&counter)).unwrap();
+
+ assert_eq!(vec.len(), 5);
+ assert_eq!(Rc::strong_count(&counter), 6);
+ vec.truncate(1);
+ assert_eq!(Rc::strong_count(&counter), 2);
+
+ drop(vec);
+ assert_eq!(Rc::strong_count(&counter), 1);
+ }
+}
diff --git a/tests/expected/stdio/printf.stdout b/tests/expected/stdio/printf.stdout
index ca878f7fa..5683f0cad 100644
--- a/tests/expected/stdio/printf.stdout
+++ b/tests/expected/stdio/printf.stdout
@@ -60,3 +60,7 @@ Non-finite float madness:
%F: INF -INF NAN -NAN
%g: inf -inf nan -nan
%G: INF -INF NAN -NAN
+Testing asprintf...
+printed: test string, value: 11
+printed: test string 2, value: 13
+printed: test string 2, value: 13
diff --git a/tests/stdio/printf.c b/tests/stdio/printf.c
index 6e05cad21..c8fdafef6 100644
--- a/tests/stdio/printf.c
+++ b/tests/stdio/printf.c
@@ -74,4 +74,16 @@ int main(void) {
}
printf("\n");
}
+
+ puts("Testing asprintf...");
+ char *s = NULL;
+ int res = asprintf(&s, "test string");
+ printf("printed: %s, value: %d\n", s, res);
+ free(s);
+ res = asprintf(&s, "test string %d", 2);
+ printf("printed: %s, value: %d\n", s, res);
+ free(s);
+ res = asprintf(&s, "test %s %d", "string", 2);
+ printf("printed: %s, value: %d\n", s, res);
+ free(s);
}
diff --git a/tests/verify.sh b/tests/verify.sh
index 86438f894..2f778e1a6 100755
--- a/tests/verify.sh
+++ b/tests/verify.sh
@@ -40,6 +40,5 @@ do
if [ "${status}" != "0" ]
then
echo "# ${name}: failed with status ${status} #"
- exit 1
fi
done
--
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