141 lines
3.3 KiB
C++
141 lines
3.3 KiB
C++
#pragma once
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#include "Orange/Core/Vector.h"
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#include <Orange/Core/Result.h>
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#include <Orange/Core/Span.h>
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#include <charconv>
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#include <string.h>
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namespace orange::stream
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{
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template <typename T>
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Result<T> Parse(const char*& first, const char* end)
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{
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T obj;
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auto result = std::from_chars(first, end, obj);
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if (result.ec == std::errc{})
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{
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first = result.ptr;
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return Result<T>::Success(obj);
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}
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return Result<T>::Error(BasicErrorCode::NotFound);
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}
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template <typename T>
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Result<T> Parse(const char*& first, size_t length)
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{
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return Parse<T>(first, first + length);
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}
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template <typename T>
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Result<T> Parse(const char*& first)
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{
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return Parse<T>(first, first + strlen(first));
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}
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inline bool EndOfStream(const char* first, const char* end)
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{
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return first == end || *first == '\0';
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}
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inline bool CharMatches(char character, StringView delims)
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{
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for (auto delim : delims)
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{
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if (character == delim)
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return true;
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}
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return false;
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}
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inline size_t Consume(const char*& first, const char* end, StringView delims)
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{
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size_t count = 0;
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while (!EndOfStream(first, end) && CharMatches(*first, delims))
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{
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first++;
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count++;
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}
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return count;
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}
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inline size_t ConsumeSpace(const char*& first, const char* end)
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{
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return Consume(first, end, " \t");
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}
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inline size_t ConsumeSpaceAndNewLine(const char*& first, const char* end)
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{
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return Consume(first, end, " \t\r\n");
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}
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template <typename OutArray = SmallVector<char, 1>>
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size_t ReadOrAdvance(const char*& first, const char* end, StringView delims, size_t advancement = 0, OutArray* array = nullptr)
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{
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size_t count = 0;
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while (!EndOfStream(first, end) && !CharMatches(*first, delims))
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{
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if (array)
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array->push_back(*first);
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first++;
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count++;
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}
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if (EndOfStream(first, end))
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return count;
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first += advancement;
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return count;
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}
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template <typename OutArray = SmallVector<char, 1>>
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size_t ReadString(const char*& first, const char* end, StringView delims, OutArray& array)
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{
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return ReadOrAdvance(first, end, delims, 0, &array);
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}
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inline size_t AdvancePast(const char*& first, const char* end, StringView delims)
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{
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return ReadOrAdvance(first, end, delims, 1);
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}
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inline bool IsStringToken(StringView fullRange, const char* first)
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{
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if (*first != '"')
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return false;
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// Make sure we are in-range for the checks below.
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if (fullRange.begin() == first || fullRange.begin() == first - 1)
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return true;
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// Handle \\"
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if (*(first - 2) == '\\')
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return true;
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// Hanle \"
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if (*(first - 1) == '\\')
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return false;
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return true;
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}
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inline bool IsCPPComment(StringView fullRange, const char* first)
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{
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if (*first != '/')
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return false;
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if (fullRange.end() == first + 1)
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return false;
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if (*(first + 1) != '/')
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return false;
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return true;
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}
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}
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