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Change hash function for strings.

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This commit is contained in:
lganzzzo 2020-01-25 20:37:45 +07:00
parent a9cced7479
commit d200e60eb6
2 changed files with 25 additions and 49 deletions
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18
src/oatpp/core/data/mapping/type/Primitive.hpp
View File

@ -473,22 +473,16 @@ namespace std {
typedef v_uint32 result_type;
result_type operator()(argument_type const& s) const noexcept {
p_char8 data = s->getData();
v_buff_size size4 = s->getSize() >> 2;
result_type result = 0;
for(v_buff_size i = 0; i < size4; i++) {
result ^= *((p_uint32) data);
data += 4;
for(v_buff_size i = 0; i < s->getSize(); i++) {
v_char8 c = data[i] | 32;
result = (31 * result) + c;
}
for(v_buff_size i = 0; i < s->getSize() - (size4 << 2); i++ ) {
((p_char8) &result)[i] ^= data[i];
}
return result;
}
};

56
src/oatpp/core/data/share/MemoryLabel.hpp
View File

@ -235,22 +235,16 @@ namespace std {
typedef v_uint32 result_type;
result_type operator()(oatpp::data::share::StringKeyLabel const& s) const noexcept {
p_char8 data = s.getData();
v_buff_size size4 = s.getSize() >> 2;
result_type result = 0;
for(v_buff_size i = 0; i < size4; i++) {
result ^= *((p_uint32) data);
data += 4;
for(v_buff_size i = 0; i < s.getSize(); i++) {
v_char8 c = data[i];
result = (31 * result) + c;
}
for(v_buff_size i = 0; i < s.getSize() - (size4 << 2); i++ ) {
((p_char8) &result)[i] ^= data[i];
}
return result;
}
};
@ -261,22 +255,16 @@ namespace std {
typedef v_uint32 result_type;
result_type operator()(oatpp::data::share::StringKeyLabelCI const& s) const noexcept {
p_char8 data = s.getData();
v_buff_size size4 = s.getSize() >> 2;
result_type result = 0;
for(v_buff_size i = 0; i < size4; i++) {
result ^= (*((p_uint32) data) | 538976288); // 538976288 = 32 | (32 << 8) | (32 << 16) | (32 << 24);
data += 4;
for(v_buff_size i = 0; i < s.getSize(); i++) {
v_char8 c = data[i] | 32;
result = (31 * result) + c;
}
for(v_buff_size i = 0; i < s.getSize() - (size4 << 2); i++ ) {
((p_char8) &result)[i] ^= (data[i] | 32);
}
return result;
}
};
@ -285,24 +273,18 @@ namespace std {
typedef oatpp::data::share::StringKeyLabelCI_FAST argument_type;
typedef v_uint32 result_type;
result_type operator()(oatpp::data::share::StringKeyLabelCI_FAST const& s) const noexcept {
p_char8 data = s.getData();
v_buff_size size4 = s.getSize() >> 2;
result_type result = 0;
for(v_buff_size i = 0; i < size4; i++) {
result ^= (*((p_uint32) data) | 538976288); // 538976288 = 32 | (32 << 8) | (32 << 16) | (32 << 24);
data += 4;
for(v_buff_size i = 0; i < s.getSize(); i++) {
v_char8 c = data[i] | 32;
result = (31 * result) + c;
}
for(v_buff_size i = 0; i < s.getSize() - (size4 << 2); i++ ) {
((p_char8) &result)[i] ^= (data[i] | 32);
}
return result;
}
};