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std::str: Correct docstrings for lack of null terminator in ~str and &str

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This commit is contained in:
blake2-ppc 2013-08-18 13:57:35 +02:00
parent 595dd843d7
commit f33a30e7e8
1 changed files with 13 additions and 24 deletions
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37
src/libstd/str.rs
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@ -8,13 +8,12 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*!
* String manipulation
*
* Strings are a packed UTF-8 representation of text, stored as null
* terminated buffers of u8 bytes. Strings should be indexed in bytes,
* for efficiency, but UTF-8 unsafe operations should be avoided.
*/
//! String manipulation
//!
//! Strings are a packed UTF-8 representation of text, stored as
//! buffers of u8 bytes. The buffer is not null terminated.
//! Strings should be indexed in bytes, for efficiency, but UTF-8 unsafe
//! operations should be avoided.
use at_vec;
use cast;
@ -1772,8 +1771,6 @@ impl<'self> StrSlice<'self> for &'self str {
}
/// Work with the byte buffer of a string as a byte slice.
///
/// The byte slice does not include the null terminator.
fn as_bytes(&self) -> &'self [u8] {
unsafe { cast::transmute(*self) }
}
@ -1953,10 +1950,7 @@ impl<'self> StrSlice<'self> for &'self str {
/// Work with the byte buffer and length of a slice.
///
/// The given length is one byte longer than the 'official' indexable
/// length of the string. This is to permit probing the byte past the
/// indexable area for a null byte, as is the case in slices pointing
/// to full strings, or suffixes of them.
/// The buffer does not have a null terminator.
#[inline]
fn as_imm_buf<T>(&self, f: &fn(*u8, uint) -> T) -> T {
let v: &[u8] = unsafe { cast::transmute(*self) };
@ -1979,12 +1973,10 @@ pub trait OwnedStr {
/// Work with the mutable byte buffer and length of a slice.
///
/// The given length is one byte longer than the 'official' indexable
/// length of the string. This is to permit probing the byte past the
/// indexable area for a null byte, as is the case in slices pointing
/// to full strings, or suffixes of them.
/// The buffer does not have a null terminator.
///
/// Make sure any mutations to this buffer keep this string valid UTF8.
/// The caller must make sure any mutations to this buffer keep the string
/// valid UTF-8!
fn as_mut_buf<T>(&mut self, f: &fn(*mut u8, uint) -> T) -> T;
}
@ -2085,12 +2077,10 @@ impl OwnedStr for ~str {
new_str
}
/// Reserves capacity for exactly `n` bytes in the given string, not including
/// the null terminator.
/// Reserves capacity for exactly `n` bytes in the given string.
///
/// Assuming single-byte characters, the resulting string will be large
/// enough to hold a string of length `n`. To account for the null terminator,
/// the underlying buffer will have the size `n` + 1.
/// enough to hold a string of length `n`.
///
/// If the capacity for `s` is already equal to or greater than the requested
/// capacity, then no action is taken.
@ -2110,8 +2100,7 @@ impl OwnedStr for ~str {
/// Reserves capacity for at least `n` bytes in the given string.
///
/// Assuming single-byte characters, the resulting string will be large
/// enough to hold a string of length `n`. To account for the null terminator,
/// the underlying buffer will have the size `n` + 1.
/// enough to hold a string of length `n`.
///
/// This function will over-allocate in order to amortize the allocation costs
/// in scenarios where the caller may need to repeatedly reserve additional