mirror of https://github.com/odrling/Aegisub
Rewrite LuaScriptReader, making it simpler and adding support for more charsets
Originally committed to SVN as r5619.
This commit is contained in:
Thomas Goyne
parent
432abc309b
commit
0b6ef72242
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@ -1,31 +1,16 @@
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// Copyright (c) 2006, 2007, Niels Martin Hansen
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// All rights reserved.
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// Copyright (c) 2011, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// $Id$
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@ -34,98 +19,50 @@
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/// @ingroup scripting
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///
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#include "config.h"
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#ifdef WITH_AUTO4_LUA
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#include "auto4_lua_scriptreader.h"
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#include <libaegisub/io.h>
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#include <libaegisub/charset_conv.h>
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#include "charset_detect.h"
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#include "compat.h"
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/// DOCME
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namespace Automation4 {
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/// @brief // LuaScriptReader
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/// @param filename
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///
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LuaScriptReader::LuaScriptReader(const wxString &filename)
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LuaScriptReader::LuaScriptReader(wxString const& filename)
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: conv(new agi::charset::IconvWrapper(CharSetDetect::GetEncoding(filename).c_str(), "utf-8", false))
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, file(agi::io::Open(STD_STR(filename)))
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{
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#ifdef WIN32
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f = _wfopen(filename.wc_str(), L"rb");
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#else
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f = fopen(filename.fn_str(), "rb");
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#endif
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if (!f)
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throw "Could not open script file";
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first = true;
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databuf = new char[bufsize];
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}
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LuaScriptReader::~LuaScriptReader() { }
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/// @brief DOCME
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///
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LuaScriptReader::~LuaScriptReader()
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{
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if (databuf)
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delete[] databuf;
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fclose(f);
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}
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const char *LuaScriptReader::Read(size_t *bytes_read) {
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char in_buf[512];
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file->read(in_buf, sizeof(in_buf));
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const char *in = in_buf;
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char *out = buf;
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size_t in_bytes = file->gcount();
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size_t out_bytes = sizeof(buf);
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/// @brief DOCME
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/// @param L
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/// @param data
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/// @param size
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///
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const char* LuaScriptReader::reader_func(lua_State *L, void *data, size_t *size)
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{
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LuaScriptReader *self = (LuaScriptReader*)(data);
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unsigned char *b = (unsigned char *)self->databuf;
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FILE *f = self->f;
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conv->Convert(&in, &in_bytes, &out, &out_bytes);
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*bytes_read = out - buf;
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if (feof(f)) {
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*size = 0;
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return 0;
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// Skip the bom
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if (*bytes_read >= 3 && buf[0] == -17 && buf[1] == -69 && buf[2] == -65) {
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*bytes_read -= 3;
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return buf + 3;
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}
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if (self->first) {
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// check if file is sensible and maybe skip bom
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if ((*size = fread(b, 1, 4, f)) == 4) {
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if (b[0] == 0xEF && b[1] == 0xBB && b[2] == 0xBF) {
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// got an utf8 file with bom
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// nothing further to do, already skipped the bom
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fseek(f, -1, SEEK_CUR);
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} else {
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// oops, not utf8 with bom
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// check if there is some other BOM in place and complain if there is...
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if ((b[0] == 0xFF && b[1] == 0xFE && b[2] == 0x00 && b[3] == 0x00) || // utf32be
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(b[0] == 0x00 && b[1] == 0x00 && b[2] == 0xFE && b[3] == 0xFF) || // utf32le
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(b[0] == 0xFF && b[1] == 0xFE) || // utf16be
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(b[0] == 0xFE && b[1] == 0xFF) || // utf16le
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(b[0] == 0x2B && b[1] == 0x2F && b[2] == 0x76) || // utf7
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(b[0] == 0x00 && b[2] == 0x00) || // looks like utf16be
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(b[1] == 0x00 && b[3] == 0x00)) { // looks like utf16le
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throw "The script file uses an unsupported character set. Only UTF-8 is supported.";
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}
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// assume utf8 without bom, and rewind file
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fseek(f, 0, SEEK_SET);
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}
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} else {
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// hmm, rather short file this...
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// doesn't have a bom, assume it's just ascii/utf8 without bom
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return self->databuf; // *size is already set
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}
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self->first = false;
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}
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*size = fread(b, 1, bufsize, f);
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return self->databuf;
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return buf;
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}
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const char* LuaScriptReader::reader_func(lua_State *, void *data, size_t *size) {
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return static_cast<LuaScriptReader*>(data)->Read(size);
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}
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};
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#endif // WITH_AUTO4_LUA
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@ -1,31 +1,16 @@
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// Copyright (c) 2006, 2007, Niels Martin Hansen
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// All rights reserved.
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// Copyright (c) 2011, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
|
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// $Id$
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@ -34,42 +19,27 @@
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/// @ingroup scripting
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///
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#include <wx/string.h>
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#ifdef __WINDOWS__
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#include "../../contrib/lua51/src/lua.h"
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#else
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#include "lua.hpp"
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#ifndef AGI_PRE
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#include <istream>
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#endif
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#include <libaegisub/scoped_ptr.h>
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struct lua_State;
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namespace agi { namespace charset { class IconvWrapper; } }
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class wxString;
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/// DOCME
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namespace Automation4 {
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class LuaScriptReader {
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agi::scoped_ptr<agi::charset::IconvWrapper> conv;
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agi::scoped_ptr<std::istream> file;
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char buf[512];
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/// DOCME
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struct LuaScriptReader {
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/// DOCME
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FILE *f;
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/// DOCME
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bool first;
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/// DOCME
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char *databuf;
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/// DOCME
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static const size_t bufsize = 512;
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LuaScriptReader(const wxString &filename);
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const char *Read(size_t *bytes_read);
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public:
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LuaScriptReader(wxString const& filename);
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~LuaScriptReader();
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static const char* reader_func(lua_State *L, void *data, size_t *size);
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static const char* reader_func(lua_State *, void *data, size_t *size);
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};
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};
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