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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 ruki
* @file file_convert.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "file_convert"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#include "../utils/charset.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* convert file
*
* @param srcpath the srcpath
* @param dstpath the dstpath
* @param ftype the from-charset type, e.g. ascii, gb2312, gbk, ios8859, ucs2, ucs4, utf8, utf16, utf32
* @param ttype the to-charset type
*
* @code
* io.convert(srcpath, dstpath, "gbk", "utf8")
* io.convert(srcpath, dstpath, "utf8", "gb2312")
* @endcode
*/
tb_int_t xm_io_file_convert(lua_State *lua) {
// check
tb_assert_and_check_return_val(lua, 0);
#ifdef TB_CONFIG_MODULE_HAVE_CHARSET
// get arguments
tb_char_t const *srcpath = luaL_checkstring(lua, 1);
tb_char_t const *dstpath = luaL_checkstring(lua, 2);
tb_char_t const *fname = luaL_checkstring(lua, 3);
tb_char_t const *tname = luaL_checkstring(lua, 4);
tb_check_return_val(srcpath && dstpath && fname && tname, 0);
// get charset type
tb_size_t ftype = TB_CHARSET_TYPE_UTF8;
tb_size_t ttype = TB_CHARSET_TYPE_UTF8;
xm_charset_entry_ref_t fentry = xm_charset_find_by_name(fname);
if (fentry) ftype = fentry->type;
else {
lua_pushfstring(lua, "invalid charset: %s", fname);
lua_error(lua);
}
xm_charset_entry_ref_t tentry = xm_charset_find_by_name(tname);
if (tentry) ttype = tentry->type;
else {
lua_pushfstring(lua, "invalid charset: %s", tname);
lua_error(lua);
}
// done
tb_bool_t ok = tb_false;
tb_stream_ref_t istream = tb_null;
tb_stream_ref_t ostream = tb_null;
tb_stream_ref_t fstream = tb_null;
do {
// init istream
istream = tb_stream_init_from_file(srcpath, TB_FILE_MODE_RO);
tb_assert_and_check_break(istream);
// open istream
if (!tb_stream_open(istream)) break;
// skip bom
tb_size_t skip = 0;
tb_byte_t* bom_data = tb_null;
tb_long_t bom_size = tb_stream_peek(istream, &bom_data, 3);
if (bom_size >= 3 && ftype == TB_CHARSET_TYPE_UTF8 && bom_data[0] == 0xef && bom_data[1] == 0xbb && bom_data[2] == 0xbf) {
skip = 3;
} else if (bom_size >= 2 && (ftype & TB_CHARSET_TYPE_UTF16)) {
if (bom_data[0] == 0xff && bom_data[1] == 0xfe) skip = 2;
else if (bom_data[0] == 0xfe && bom_data[1] == 0xff) skip = 2;
}
if (skip > 0 && !tb_stream_skip(istream, skip)) break;
// init ostream
ostream = tb_stream_init_from_file(dstpath, TB_FILE_MODE_RW | TB_FILE_MODE_CREAT | TB_FILE_MODE_TRUNC);
tb_assert_and_check_break(ostream);
// open ostream
if (!tb_stream_open(ostream)) break;
// write bom
if (!tb_strcmp(tname, "utf8bom")) {
static tb_byte_t const k_bom[] = {0xef, 0xbb, 0xbf};
if (!tb_stream_bwrit(ostream, k_bom, 3)) break;
} else if (!tb_strcmp(tname, "utf16lebom")) {
static tb_byte_t const k_bom[] = {0xff, 0xfe};
if (!tb_stream_bwrit(ostream, k_bom, 2)) break;
} else if (!tb_strcmp(tname, "utf16bom")) {
#ifndef TB_WORDS_BIGENDIAN
static tb_byte_t const k_bom[] = {0xff, 0xfe};
#else
static tb_byte_t const k_bom[] = {0xfe, 0xff};
#endif
if (!tb_stream_bwrit(ostream, k_bom, 2)) break;
}
// init fstream
fstream = tb_stream_init_filter_from_charset(istream, ftype, ttype);
tb_assert_and_check_break(fstream);
// open fstream
if (!tb_stream_open(fstream)) break;
// transfer
tb_byte_t data[TB_STREAM_BLOCK_MAXN];
while (1) {
tb_long_t real = tb_stream_read(fstream, data, sizeof(data));
if (real > 0) {
if (!tb_stream_bwrit(ostream, data, real)) break;
} else if (real == 0) {
tb_long_t wait = tb_stream_wait(fstream, TB_STREAM_WAIT_READ, tb_stream_timeout(fstream));
if (wait <= 0) break;
} else break;
}
// ok
ok = tb_true;
} while (0);
// exit fstream
if (fstream) tb_stream_exit(fstream);
fstream = tb_null;
// exit istream
if (istream) tb_stream_exit(istream);
istream = tb_null;
// exit ostream
if (ostream) tb_stream_exit(ostream);
ostream = tb_null;
// ok?
lua_pushboolean(lua, ok);
return 1;
#else
lua_pushboolean(lua, tb_false);
return 1;
#endif
}
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