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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 ruki
* @file pipe_write.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "pipe_write"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
// io.pipe_write(pipefile, data, start, last)
tb_int_t xm_io_pipe_write(lua_State* lua)
{
// check
tb_assert_and_check_return_val(lua, 0);
// check pipe
if (!xm_lua_ispointer(lua, 1))
{
lua_pushinteger(lua, -1);
lua_pushliteral(lua, "invalid pipe file!");
return 2;
}
// get pipe file
tb_pipe_file_ref_t pipefile = (tb_pipe_file_ref_t)xm_lua_topointer(lua, 1);
tb_check_return_val(pipefile, 0);
// get data
tb_size_t size = 0;
tb_byte_t const* data = tb_null;
if (lua_istable(lua, 2))
{
// get data address
lua_pushstring(lua, "data");
lua_gettable(lua, 2);
data = (tb_byte_t const*)(tb_size_t)(tb_long_t)lua_tonumber(lua, -1);
lua_pop(lua, 1);
// get data size
lua_pushstring(lua, "size");
lua_gettable(lua, 2);
size = (tb_size_t)lua_tonumber(lua, -1);
lua_pop(lua, 1);
}
else
{
size_t datasize = 0;
data = (tb_byte_t const*)luaL_checklstring(lua, 2, &datasize);
size = (tb_size_t)datasize;
}
if (!data || !size)
{
lua_pushinteger(lua, -1);
lua_pushfstring(lua, "invalid data(%p) and size(%zu)!", data, size);
return 2;
}
// get start
tb_long_t start = 1;
if (lua_isnumber(lua, 3)) start = (tb_long_t)lua_tonumber(lua, 3);
if (start < 1 || start > size)
{
lua_pushinteger(lua, -1);
lua_pushfstring(lua, "invalid start position(%ld)!", start);
return 2;
}
// get last
tb_long_t last = (tb_long_t)size;
if (lua_isnumber(lua, 4)) last = (tb_long_t)lua_tonumber(lua, 4);
if (last < start - 1 || last > size + start - 1)
{
lua_pushinteger(lua, -1);
lua_pushfstring(lua, "invalid last position(%ld)!", last);
return 2;
}
// write data
tb_long_t real = tb_pipe_file_write(pipefile, data + start - 1, last - start + 1);
lua_pushinteger(lua, (tb_int_t)real);
return 1;
}
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