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167
src/runtime/local/datastructures/FixedSizeStringValueType.h
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| /* | ||
| * Copyright 2021 The DAPHNE Consortium | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| #pragma once | ||
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| #include <iostream> | ||
| #include <stdexcept> | ||
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| #include <cstddef> | ||
| #include <algorithm> | ||
| #include <cstring> | ||
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| #include <string> | ||
| #include <vector> | ||
| #include <string.h> | ||
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| struct FixedStr16 { | ||
| static const std::size_t N = 16; | ||
| char buffer[N]; | ||
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| // Default constructor | ||
| FixedStr16() { | ||
| std::fill(buffer, buffer + N, '\0'); | ||
| } | ||
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| // Constructor from a C-style string | ||
| FixedStr16(const char* str) { | ||
| size_t len = std::strlen(str); | ||
| if (len > N) { | ||
| throw std::length_error("string exceeds fixed buffer size"); | ||
| } | ||
| std::copy(str, str + len, buffer); | ||
| std::fill(buffer + len, buffer + N, '\0'); | ||
| } | ||
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| // Copy constructor | ||
| FixedStr16(const FixedStr16& other) { | ||
| std::copy(other.buffer, other.buffer + N, buffer); | ||
| } | ||
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| // Constructor from a std::string | ||
| FixedStr16(const std::string& other) { | ||
| size_t len = other.size(); | ||
| if (len > N) { | ||
| throw std::length_error("string exceeds fixed buffer size"); | ||
| } | ||
| std::copy(other.begin(), other.end() + N, buffer); | ||
| std::fill(buffer + len, buffer + N, '\0'); | ||
| } | ||
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| // Assignment operator | ||
| FixedStr16& operator=(const FixedStr16& other) { | ||
| if (this != &other) { | ||
| std::copy(other.buffer, other.buffer + N, buffer); | ||
| } | ||
| return *this; | ||
| } | ||
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| // Overriding the equality operator | ||
| bool operator==(const FixedStr16& other) const { | ||
| return std::equal(buffer, buffer + N, other.buffer); | ||
| } | ||
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| bool operator==(const char* str) const { | ||
| return std::strncmp(buffer, str, sizeof(buffer)) == 0; | ||
| } | ||
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| // Overriding the inequality operator | ||
| bool operator!=(const FixedStr16& other) const { | ||
| return !(std::equal(buffer, buffer + N, other.buffer)); | ||
| } | ||
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| bool operator!=(const char* str) const { | ||
| return !(std::strncmp(buffer, str, sizeof(buffer)) == 0); | ||
| } | ||
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| // Overriding the Less than operator | ||
| bool operator<(const FixedStr16& other) const { | ||
| return std::strncmp(buffer, other.buffer, N) < 0; | ||
| } | ||
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| // Overriding the Greater than operator | ||
| bool operator>(const FixedStr16& other) const { | ||
| return std::strncmp(buffer, other.buffer, N) > 0; | ||
| } | ||
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| // Concatenation operator | ||
| friend std::string operator+(const FixedStr16& lhs, const FixedStr16& rhs) { | ||
| std::string result(lhs.buffer); | ||
| result.append(rhs.buffer); | ||
| return result; | ||
| } | ||
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| // Serialization function | ||
| void serialize(std::vector<char>& outBuffer) const { | ||
| outBuffer.insert(outBuffer.end(), buffer, buffer + N); | ||
| } | ||
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| // Overload the output stream operator | ||
| friend std::ostream& operator<<(std::ostream& os, const FixedStr16& fs) { | ||
| os.write(fs.buffer, N); | ||
| return os; | ||
| } | ||
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| // Size method | ||
| size_t size() const { | ||
| return std::strlen(buffer); | ||
| } | ||
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| // Method to set the string | ||
| void set(const char* str) { | ||
| size_t len = std::strlen(str); | ||
| if (len > N) { | ||
| throw std::length_error("string exceeds fixed buffer size"); | ||
| } | ||
| std::transform(str, str + len, buffer, [](char c) { return c; }); | ||
| std::fill(buffer + len, buffer + N, '\0'); | ||
| } | ||
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| // C-string method for compatibility | ||
| std::string to_string() const { | ||
| return std::string(buffer, size()); | ||
| } | ||
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| // Compare method similar to std::string::compare | ||
| int compare(const FixedStr16& other) const { | ||
| return std::strncmp(buffer, other.buffer, N); | ||
| } | ||
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| // Convert to lowercase | ||
| FixedStr16 lower() const { | ||
| FixedStr16 result; | ||
| std::transform(buffer, buffer + N, result.buffer, [](unsigned char c) { return std::tolower(c); }); | ||
| return result; | ||
| } | ||
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| // Convert to uppercase | ||
| FixedStr16 upper() const { | ||
| FixedStr16 result; | ||
| std::transform(buffer, buffer + N, result.buffer, [](unsigned char c) { return std::toupper(c); }); | ||
| return result; | ||
| } | ||
| }; | ||
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| // Specialize std::hash for FixedStr16 this is nessary to use FixedStr16 as a key in std::unordered_map | ||
| namespace std { | ||
| template <> | ||
| struct hash<FixedStr16> { | ||
| std::size_t operator()(const FixedStr16& key) const { | ||
| // Compute the hash of the fixed-size buffer | ||
| return std::hash<std::string>()(std::string(key.buffer, key.N)); | ||
| } | ||
| }; | ||
| } |
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