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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, Xmake Open Source Community.
*
* @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 <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.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 = tb_null;
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);
/* we cannot call is_cygpty for stdin, because it will cause io.readable is always true
* https://github.com/xmake-io/xmake/issues/2504#issuecomment-1170130756
*/
if (!answer && type != XM_IO_FILE_TYPE_STDIN) {
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;
}
// @see https://github.com/xmake-io/xmake/issues/2580
static tb_void_t xm_io_stdfile_init_buffer(tb_size_t type) {
#if !defined(TB_CONFIG_OS_WINDOWS)
struct stat stats;
tb_int_t size = BUFSIZ;
if (fstat(fileno(stdout), &stats) != -1) {
size = stats.st_blksize;
}
setvbuf(stdout, tb_null, _IOLBF, size);
#endif
}
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->u.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 stdio buffer
xm_io_stdfile_init_buffer(type);
// 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) {
tb_assert_and_check_return_val(lua, 0);
// get std type
tb_long_t type = (tb_long_t)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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