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// Copyright (c) 2021 Vinnie Falco (vinnie.falco@gmail.com)
// Copyright (c) 2024 Christian Mazakas
// Copyright (c) 2025 Mohammad Nejati
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// Official repository: https://github.com/cppalliance/http
#include <boost/http/request_base.hpp>
#include <cstring>
namespace boost {
namespace http {
request_base::
set_expect_100_continue(bool b)
    if(h_.md.expect.count == 0)
        BOOST_ASSERT(
            ! h_.md.expect.ec);
        BOOST_ASSERT(
            ! h_.md.expect.is_100_continue);
        if( b )
            append(
                field::expect,
                "100-continue");
            return;
        return;
    if(h_.md.expect.count == 1)
        if(b)
            if(! h_.md.expect.ec)
                BOOST_ASSERT(
                    h_.md.expect.is_100_continue);
                return;
            BOOST_ASSERT(
                ! h_.md.expect.is_100_continue);
            auto it = find(field::expect);
            BOOST_ASSERT(it != end());
            set(it, "100-continue");
            return;
        auto it = find(field::expect);
        BOOST_ASSERT(it != end());
        erase(it);
        return;
    BOOST_ASSERT(h_.md.expect.ec);
    auto nc = (b ? 1 : 0);
    auto ne = h_.md.expect.count - nc;
    if( b )
        set(find(field::expect), "100-continue");
    raw_erase_n(field::expect, ne);
    h_.md.expect.count = nc;
    h_.md.expect.ec = {};
    h_.md.expect.is_100_continue = b;
//------------------------------------------------
request_base::
set_start_line_impl(
    http::method m,
    core::string_view ms,
    core::string_view t,
    http::version v)
    // TODO: check validity
    auto const vs = to_string(v);
    auto const new_prefix =
        ms.size() + 1 + // method SP
        t.size() + 1 +  // request-target SP
        vs.size() + 2;  // HTTP-version CRLF
    // Introduce a new scope so that prefix_op's
    // destructor runs before h_.on_start_line().
        auto op = prefix_op_t(
            *this, new_prefix, &ms, &t);
        h_.version = v;
        h_.req.method = m;
        h_.req.method_len = static_cast<
            offset_type>(ms.size());
        h_.req.target_len = static_cast<
            offset_type>(t.size());
        char* m_dest = h_.buf;
        char* t_dest = h_.buf + ms.size() + 1;
        char* v_dest = t_dest + t.size() + 1;
        std::memmove(t_dest, t.data(), t.size());
        t_dest[t.size()] = ' ';
        // memmove after target because could overlap
        std::memmove(m_dest, ms.data(), ms.size());
        m_dest[ms.size()] = ' ';
        std::memcpy(v_dest, vs.data(), vs.size());
        v_dest[vs.size() + 0] = '\r';
        v_dest[vs.size() + 1] = '\n';
    h_.on_start_line();

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