106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
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// Copyright (c) 2006, 2007, Niels Martin Hansen
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// All rights reserved.
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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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//
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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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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:jiifurusu@gmail.com
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//
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#include "auto4_lua_scriptreader.h"
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namespace Automation4 {
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// LuaScriptReader
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LuaScriptReader::LuaScriptReader(const wxString &filename)
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{
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#ifdef WIN32
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f = _tfopen(filename.c_str(), _T("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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first = true;
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databuf = new char[bufsize];
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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::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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if (feof(f)) {
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*size = 0;
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return 0;
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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 _T("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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}
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};
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