Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/gfx/angle/checkout/src/compiler/translator/ImmutableString.cpp b/gfx/angle/checkout/src/compiler/translator/ImmutableString.cpp
new file mode 100644
index 0000000000..38f3fa052c
--- /dev/null
+++ b/gfx/angle/checkout/src/compiler/translator/ImmutableString.cpp
@@ -0,0 +1,69 @@
+//
+// Copyright (c) 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// ImmutableString.cpp: Wrapper for static or pool allocated char arrays, that are guaranteed to be
+// valid and unchanged for the duration of the compilation.
+//
+
+#include "compiler/translator/ImmutableString.h"
+
+std::ostream &operator<<(std::ostream &os, const sh::ImmutableString &str)
+{
+    return os.write(str.data(), str.length());
+}
+
+#if defined(_MSC_VER)
+#    pragma warning(disable : 4309)  // truncation of constant value
+#endif
+
+namespace sh
+{
+
+template <>
+const size_t ImmutableString::FowlerNollVoHash<4>::kFnvPrime = 16777619u;
+
+template <>
+const size_t ImmutableString::FowlerNollVoHash<4>::kFnvOffsetBasis = 0x811c9dc5u;
+
+template <>
+const size_t ImmutableString::FowlerNollVoHash<8>::kFnvPrime =
+    static_cast<size_t>(1099511628211ull);
+
+template <>
+const size_t ImmutableString::FowlerNollVoHash<8>::kFnvOffsetBasis =
+    static_cast<size_t>(0xcbf29ce484222325ull);
+
+uint32_t ImmutableString::mangledNameHash() const
+{
+    const char *dataPtr              = data();
+    uint32_t hash                    = static_cast<uint32_t>(FowlerNollVoHash<4>::kFnvOffsetBasis);
+    const uint32_t kMaxSixBitValue   = (1u << 6) - 1u;
+    uint32_t parenLocation           = kMaxSixBitValue;
+    uint32_t hasArrayOrBlockParamBit = 0u;
+    uint32_t index                   = 0;
+    while (dataPtr[index] != '\0')
+    {
+        hash = hash ^ dataPtr[index];
+        hash = hash * static_cast<uint32_t>(FowlerNollVoHash<4>::kFnvPrime);
+        if (dataPtr[index] == '(')
+        {
+            // We should only reach here once, since this function should not be called with invalid
+            // mangled names.
+            ASSERT(parenLocation == kMaxSixBitValue);
+            parenLocation = index;
+        }
+        else if (dataPtr[index] == '{' || dataPtr[index] == '[')
+        {
+            hasArrayOrBlockParamBit = 1u;
+        }
+        ++index;
+    }
+    // Should not be called with strings longer than 63 characters.
+    ASSERT(index <= kMaxSixBitValue);
+    return ((hash >> 13) ^ (hash & 0x1fff)) | (index << 19) | (parenLocation << 25) |
+           (hasArrayOrBlockParamBit << 31);
+}
+
+}  // namespace sh