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template specialized Hash functions for 16-bit hash types (#4631)

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added access to HashFunction for 16 bit
This commit is contained in:
Christian Helmich
2018-02-24 03:29:37 +09:00
committed by Wouter van Oortmerssen
parent b24c0b07a3
commit 6e2e909b5c
3 changed files with 62 additions and 6 deletions
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21
src/idl_parser.cpp
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@@ -681,6 +681,13 @@ CheckedError Parser::ParseField(StructDef &struct_def) {
auto hash_name = field->attributes.Lookup("hash");
if (hash_name) {
switch ((type.base_type == BASE_TYPE_VECTOR) ? type.element : type.base_type) {
case BASE_TYPE_SHORT:
case BASE_TYPE_USHORT: {
if (FindHashFunction16(hash_name->constant.c_str()) == nullptr)
return Error("Unknown hashing algorithm for 16 bit types: " +
hash_name->constant);
break;
}
case BASE_TYPE_INT:
case BASE_TYPE_UINT: {
if (FindHashFunction32(hash_name->constant.c_str()) == nullptr)
@@ -697,7 +704,7 @@ CheckedError Parser::ParseField(StructDef &struct_def) {
}
default:
return Error(
"only int, uint, long and ulong data types support hashing.");
"only short, ushort, int, uint, long and ulong data types support hashing.");
}
}
auto cpp_type = field->attributes.Lookup("cpp_type");
@@ -1278,6 +1285,18 @@ CheckedError Parser::ParseHash(Value &e, FieldDef *field) {
assert(field);
Value *hash_name = field->attributes.Lookup("hash");
switch (e.type.base_type) {
case BASE_TYPE_SHORT: {
auto hash = FindHashFunction16(hash_name->constant.c_str());
int16_t hashed_value = static_cast<int16_t>(hash(attribute_.c_str()));
e.constant = NumToString(hashed_value);
break;
}
case BASE_TYPE_USHORT: {
auto hash = FindHashFunction16(hash_name->constant.c_str());
uint16_t hashed_value = hash(attribute_.c_str());
e.constant = NumToString(hashed_value);
break;
}
case BASE_TYPE_INT: {
auto hash = FindHashFunction32(hash_name->constant.c_str());
int32_t hashed_value = static_cast<int32_t>(hash(attribute_.c_str()));