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/*!A cross-platform build utility based on Lua
*
* 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.
*
* Copyright (C) 2015-present, TBOOX Open Source Group.
*
* @author OpportunityLiu, ruki
* @file stdfile.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "stdfile"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#ifdef TB_CONFIG_OS_WINDOWS
# include <io.h>
# include "iscygpty.c"
#else
# include <unistd.h>
#endif
/* //////////////////////////////////////////////////////////////////////////////////////
* macros
*/
// the singleton type of stdfile
#define XM_IO_STDFILE_STDIN (TB_SINGLETON_TYPE_USER + 1)
#define XM_IO_STDFILE_STDOUT (TB_SINGLETON_TYPE_USER + 2)
#define XM_IO_STDFILE_STDERR (TB_SINGLETON_TYPE_USER + 3)
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
static tb_size_t xm_io_stdfile_isatty(tb_size_t type)
{
tb_bool_t answer = tb_false;
#if defined(TB_CONFIG_OS_WINDOWS)
DWORD mode;
HANDLE console_handle;
switch (type)
{
case XM_IO_FILE_TYPE_STDIN: console_handle = GetStdHandle(STD_INPUT_HANDLE); break;
case XM_IO_FILE_TYPE_STDOUT: console_handle = GetStdHandle(STD_OUTPUT_HANDLE); break;
case XM_IO_FILE_TYPE_STDERR: console_handle = GetStdHandle(STD_ERROR_HANDLE); break;
}
answer = GetConsoleMode(console_handle, &mode);
if (!answer)
answer = is_cygpty(console_handle);
#else
switch (type)
{
case XM_IO_FILE_TYPE_STDIN: answer = isatty(fileno(stdin)); break;
case XM_IO_FILE_TYPE_STDOUT: answer = isatty(fileno(stdout)); break;
case XM_IO_FILE_TYPE_STDERR: answer = isatty(fileno(stderr)); break;
}
#endif
if (answer) type |= XM_IO_FILE_FLAG_TTY;
return type;
}
static xm_io_file_t* xm_io_stdfile_new(lua_State* lua, tb_size_t type)
{
// init stdfile
tb_stdfile_ref_t fp = tb_null;
switch (type)
{
case XM_IO_FILE_TYPE_STDIN:
fp = tb_stdfile_input();
break;
case XM_IO_FILE_TYPE_STDOUT:
fp = tb_stdfile_output();
break;
case XM_IO_FILE_TYPE_STDERR:
fp = tb_stdfile_error();
break;
}
// new file
xm_io_file_t* file = (xm_io_file_t*)lua_newuserdata(lua, sizeof(xm_io_file_t));
tb_assert_and_check_return_val(file, tb_null);
// init file
file->std_ref = fp;
file->stream = tb_null;
file->fstream = tb_null;
file->type = xm_io_stdfile_isatty(type);
file->encoding = TB_CHARSET_TYPE_UTF8;
// init the read/write line cache buffer
tb_buffer_init(&file->rcache);
tb_buffer_init(&file->wcache);
return file;
}
/* //////////////////////////////////////////////////////////////////////////////////////
* interfaces
*/
// io.stdfile(stdin: 1, stdout: 2, stderr: 3)
tb_int_t xm_io_stdfile(lua_State* lua)
{
// check
tb_assert_and_check_return_val(lua, 0);
// get std type
tb_long_t type = lua_tointeger(lua, 1);
/* push a new stdfile
*
* @note we need to ensure that it is a singleton in the external lua script, and will only be created once, e.g. io.stdin, io.stdout, io.stderr
*/
xm_io_file_t* file = xm_io_stdfile_new(lua, type);
if (file) return 1;
else xm_io_return_error(lua, "invalid stdfile type!");
}
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