mewin/vulkan-hpp
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Improve operator==() of structs (#472)

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When a struct holds a fixed size array of stuff, and the member variable right before that array is the count (determined by its specific name) for that array, we now only compare that number of stuff.

Resolves #456
This commit is contained in:
Andreas Süßenbach
2020-01-07 16:28:50 +01:00
committed by Markus Tavenrath
parent 0b3af1ee76
commit 4ee2d61ef6
2 changed files with 12 additions and 5 deletions
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11
VulkanHppGenerator.cpp
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@@ -2531,8 +2531,9 @@ void VulkanHppGenerator::appendStructCompareOperators(std::string & str, std::pa
// two structs are compared by comparing each of the elements
std::string compareMembers;
std::string intro = "";
for (auto const& member : structData.second.members)
for (size_t i = 0; i < structData.second.members.size(); i++)
{
MemberData const& member = structData.second.members[i];
compareMembers += intro;
if (member.arraySize.empty())
{
@@ -2540,7 +2541,13 @@ void VulkanHppGenerator::appendStructCompareOperators(std::string & str, std::pa
}
else
{
compareMembers += "( memcmp( " + member.name + ", rhs." + member.name + ", " + member.arraySize + " * sizeof( " + member.type.compose() + " ) ) == 0 )";
std::string arraySize = member.arraySize;
if ((0 < i) && ((stripPostfix(member.name, "s") + "Count") == structData.second.members[i - 1].name))
{
assert(structData.second.members[i - 1].type.type == "uint32_t"); // make sure, it's an unsigned type, so we don't need to clamp here
arraySize = "std::min<" + structData.second.members[i-1].type.type + ">( " + arraySize + ", " + structData.second.members[i - 1].name + " )";
}
compareMembers += "( memcmp( " + member.name + ", rhs." + member.name + ", " + arraySize + " * sizeof( " + member.type.compose() + " ) ) == 0 )";
}
intro = "\n && ";
}