git / moonbite-core / src/util/spanparsing.cpp · raw

// Copyright (c) 2018-2019 The Bitcoin Core developers// Distributed under the MIT software license, see the accompanying// file COPYING or http://www.opensource.org/licenses/mit-license.php.#include <util/spanparsing.h>#include <span.h>#include <string>#include <vector>namespace spanparsing {bool Const(const std::string& str, Span<const char>& sp){    if ((size_t)sp.size() >= str.size() && std::equal(str.begin(), str.end(), sp.begin())) {        sp = sp.subspan(str.size());        return true;    }    return false;}bool Func(const std::string& str, Span<const char>& sp){    if ((size_t)sp.size() >= str.size() + 2 && sp[str.size()] == '(' && sp[sp.size() - 1] == ')' && std::equal(str.begin(), str.end(), sp.begin())) {        sp = sp.subspan(str.size() + 1, sp.size() - str.size() - 2);        return true;    }    return false;}Span<const char> Expr(Span<const char>& sp){    int level = 0;    auto it = sp.begin();    while (it != sp.end()) {        if (*it == '(') {            ++level;        } else if (level && *it == ')') {            --level;        } else if (level == 0 && (*it == ')' || *it == ',')) {            break;        }        ++it;    }    Span<const char> ret = sp.first(it - sp.begin());    sp = sp.subspan(it - sp.begin());    return ret;}std::vector<Span<const char>> Split(const Span<const char>& sp, char sep){    std::vector<Span<const char>> ret;    auto it = sp.begin();    auto start = it;    while (it != sp.end()) {        if (*it == sep) {            ret.emplace_back(start, it);            start = it + 1;        }        ++it;    }    ret.emplace_back(start, it);    return ret;}} // namespace spanparsing