//===-- ThisThread.cpp ------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/Core/Error.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/ThisThread.h"

#include "llvm/ADT/STLExtras.h"

#include <algorithm>

using namespace lldb;
using namespace lldb_private;

void
ThisThread::SetName(llvm::StringRef name, int max_length)
{
    std::string truncated_name(name.data());

    // Thread names are coming in like '<lldb.comm.debugger.edit>' and
    // '<lldb.comm.debugger.editline>'.  So just chopping the end of the string
    // off leads to a lot of similar named threads.  Go through the thread name
    // and search for the last dot and use that.

    if (max_length > 0 && truncated_name.length() > static_cast<size_t>(max_length))
    {
        // First see if we can get lucky by removing any initial or final braces.
        std::string::size_type begin = truncated_name.find_first_not_of("(<");
        std::string::size_type end = truncated_name.find_last_not_of(")>.");
        if (end - begin > static_cast<size_t>(max_length))
        {
            // We're still too long.  Since this is a dotted component, use everything after the last
            // dot, up to a maximum of |length| characters.
            std::string::size_type last_dot = truncated_name.find_last_of(".");
            if (last_dot != std::string::npos)
                begin = last_dot + 1;

            end = std::min(end, begin + max_length);
        }

        std::string::size_type count = end - begin + 1;
        truncated_name = truncated_name.substr(begin, count);
    }

    SetName(truncated_name.c_str());
}