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Add mozilla::Span

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This commit is contained in:
trav90 2018-10-06 17:29:50 -05:00 • committed by Roy Tam
commit 037afae5e6
10 changed files with 3386 additions and 0 deletions
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83
xpcom/string/nsTSubstring.h
View file

@ -7,6 +7,8 @@
#include "mozilla/Casting.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/IntegerTypeTraits.h"
#include "mozilla/Span.h"
#ifndef MOZILLA_INTERNAL_API
#error Cannot use internal string classes without MOZILLA_INTERNAL_API defined. Use the frozen header nsStringAPI.h instead.
@ -798,6 +800,68 @@ public:
}
#endif
/**
* Span integration
*/
operator mozilla::Span<char_type>()
{
return mozilla::MakeSpan(BeginWriting(), Length());
}
operator mozilla::Span<const char_type>() const
{
return mozilla::MakeSpan(BeginReading(), Length());
}
void Append(mozilla::Span<const char_type> aSpan)
{
auto len = aSpan.Length();
MOZ_RELEASE_ASSERT(len <= mozilla::MaxValue<size_type>::value);
Append(aSpan.Elements(), len);
}
MOZ_MUST_USE bool Append(mozilla::Span<const char_type> aSpan,
const fallible_t& aFallible)
{
auto len = aSpan.Length();
if (len > mozilla::MaxValue<size_type>::value) {
return false;
}
return Append(aSpan.Elements(), len, aFallible);
}
#if !defined(CharT_is_PRUnichar)
operator mozilla::Span<uint8_t>()
{
return mozilla::MakeSpan(reinterpret_cast<uint8_t*>(BeginWriting()),
Length());
}
operator mozilla::Span<const uint8_t>() const
{
return mozilla::MakeSpan(reinterpret_cast<const uint8_t*>(BeginReading()),
Length());
}
void Append(mozilla::Span<const uint8_t> aSpan)
{
auto len = aSpan.Length();
MOZ_RELEASE_ASSERT(len <= mozilla::MaxValue<size_type>::value);
Append(reinterpret_cast<const char*>(aSpan.Elements()), len);
}
MOZ_MUST_USE bool Append(mozilla::Span<const uint8_t> aSpan,
const fallible_t& aFallible)
{
auto len = aSpan.Length();
if (len > mozilla::MaxValue<size_type>::value) {
return false;
}
return Append(
reinterpret_cast<const char*>(aSpan.Elements()), len, aFallible);
}
#endif
/**
* string data is never null, but can be marked void. if true, the
@ -1184,3 +1248,22 @@ operator>(const nsTSubstring_CharT::base_string_type& aLhs,
{
return Compare(aLhs, aRhs) > 0;
}
/**
* Span integration
*/
namespace mozilla {
inline Span<CharT>
MakeSpan(nsTSubstring_CharT& aString)
{
return aString;
}
inline Span<const CharT>
MakeSpan(const nsTSubstring_CharT& aString)
{
return aString;
}
} // namespace mozilla