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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 file_write.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "file_write"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
static tb_void_t xm_io_file_write_file_directly(xm_io_file_t* file, tb_char_t const* data, tb_size_t size)
{
// check
tb_assert(file && data && xm_io_file_is_file(file) && file->file_ref);
// write data to file
tb_stream_bwrit(file->file_ref, (tb_byte_t const*)data, size);
}
static tb_void_t xm_io_file_write_file_transcrlf(xm_io_file_t* file, tb_char_t const* data, tb_size_t size)
{
// check
tb_assert(file && data && xm_io_file_is_file(file) && file->file_ref);
#ifdef TB_CONFIG_OS_WINDOWS
// write cached data first
tb_byte_t const* odata = tb_buffer_data(&file->wcache);
tb_size_t osize = tb_buffer_size(&file->wcache);
if (odata && osize)
{
if (!tb_stream_bwrit(file->file_ref, odata, osize)) return ;
tb_buffer_clear(&file->wcache);
}
// write data by lines
tb_char_t const* p = (tb_char_t const*)data;
tb_char_t const* e = p + size;
tb_char_t const* lf = tb_null;
while (p < e)
{
lf = tb_strnchr(p, e - p, '\n');
if (lf)
{
if (lf > p && lf[-1] == '\r')
{
if (!tb_stream_bwrit(file->file_ref, (tb_byte_t const*)p, lf + 1 - p)) break;
}
else
{
if (lf > p && !tb_stream_bwrit(file->file_ref, (tb_byte_t const*)p, lf - p)) break;
if (!tb_stream_bwrit(file->file_ref, (tb_byte_t const*)"\r\n", 2)) break;
}
// next line
p = lf + 1;
}
else
{
// cache the left data
tb_buffer_memncat(&file->wcache, (tb_byte_t const*)p, e - p);
p = e;
break;
}
}
#else
return xm_io_file_write_file_directly(file, data, size);
#endif
}
static tb_void_t xm_io_file_write_std(xm_io_file_t* file, tb_char_t const* data, tb_size_t size)
{
// check
tb_assert(file && data && xm_io_file_is_std(file));
// check type
tb_size_t type = (file->type & ~XM_IO_FILE_FLAG_TTY);
tb_check_return(type != XM_IO_FILE_TYPE_STDIN);
// write data to stdout/stderr
tb_stdfile_writ(file->std_ref, (tb_byte_t const*)data, size);
}
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
// io.file_write(file, ...)
tb_int_t xm_io_file_write(lua_State* lua)
{
// check
tb_assert_and_check_return_val(lua, 0);
// is user data?
if (!lua_isuserdata(lua, 1))
xm_io_return_error(lua, "write(invalid file)!");
// get file
xm_io_file_t* file = (xm_io_file_t*)lua_touserdata(lua, 1);
tb_check_return_val(file, 0);
// write file data
tb_int_t narg = lua_gettop(lua);
if (narg > 1)
{
tb_bool_t is_binary = file->encoding == XM_IO_FILE_ENCODING_BINARY;
for (tb_int_t i = 2; i <= narg; i++)
{
// get data
size_t datasize = 0;
tb_char_t const* data = luaL_checklstring(lua, i, &datasize);
tb_check_continue(datasize);
tb_assert_and_check_break(data);
// write data to std or file
if (xm_io_file_is_std(file))
xm_io_file_write_std(file, data, (tb_size_t)datasize);
else if (is_binary)
xm_io_file_write_file_directly(file, data, (tb_size_t)datasize);
else
xm_io_file_write_file_transcrlf(file, data, (tb_size_t)datasize);
}
}
lua_settop(lua, 1);
lua_pushboolean(lua, tb_true);
return 1;
}
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