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move substr_from_str_slice from ScalarRef to Scalar

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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2022-03-01 14:41:27 +01:00
parent 67c90f2d75
commit 24ca477715
1 changed files with 28 additions and 27 deletions
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55
perlmod/src/scalar.rs
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@ -117,6 +117,34 @@ impl Scalar {
pub fn new_pointer<T>(s: *mut T) -> Self { pub fn new_pointer<T>(s: *mut T) -> Self {
Self::new_bytes(&(s as usize).to_ne_bytes()) Self::new_bytes(&(s as usize).to_ne_bytes())
} }
/// Try to produce a substring from an existing "base" value and a `&str`.
///
/// Returns `None` if `substr` is not part of `value`.
pub fn substr_from_str_slice(value: &ScalarRef, substr: &str) -> Result<Option<Scalar>, Error> {
let value_bytes = value.pv_bytes();
let value_beg = value_bytes.as_ptr() as usize;
let value_end = value_beg + value_bytes.len();
let value_range = value_beg..value_end;
let str_bytes = substr.as_bytes();
let str_beg = str_bytes.as_ptr() as usize;
let str_end = str_beg + str_bytes.len();
if !value_range.contains(&str_beg) || !value_range.contains(&str_end) {
return Ok(None);
}
// we just checked the ranges:
let start = unsafe { str_bytes.as_ptr().offset_from(value_bytes.as_ptr()) as usize };
Ok(Some(unsafe {
Scalar::from_raw_move(ffi::RSPL_substr(
ffi::RSPL_SvREFCNT_inc(value.sv()),
start,
substr.len(),
))
}))
}
} }
impl Clone for Scalar { impl Clone for Scalar {
@ -411,33 +439,6 @@ impl ScalarRef {
}) })
} }
/// Try to produce a substring from an existing "base" value and a `&str`.
///
/// Returns `None` if `substr` is not part of `value`.
pub fn substr_from_str_slice(value: &ScalarRef, substr: &str) -> Result<Option<Scalar>, Error> {
let value_bytes = value.pv_bytes();
let value_beg = value_bytes.as_ptr() as usize;
let value_end = value_beg + value_bytes.len();
let value_range = value_beg..value_end;
let str_bytes = substr.as_bytes();
let str_beg = str_bytes.as_ptr() as usize;
let str_end = str_beg + str_bytes.len();
if !value_range.contains(&str_beg) || !value_range.contains(&str_end) {
return Ok(None);
}
// we just checked the ranges:
let start = unsafe { str_bytes.as_ptr().offset_from(value_bytes.as_ptr()) as usize };
Ok(Some(unsafe {
Scalar::from_raw_move(ffi::RSPL_substr(
ffi::RSPL_SvREFCNT_inc(value.sv()),
start,
substr.len(),
))
}))
}
/// Attach magic to this value. /// Attach magic to this value.
/// ///
/// # Safety /// # Safety