74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
/*
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This file is part of Warzone 2100.
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Copyright (C) 1999-2004 Eidos Interactive
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Copyright (C) 2005-2011 Warzone 2100 Project
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Warzone 2100 is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Warzone 2100 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Warzone 2100; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "frame.h"
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#include "lexer_input.h"
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int lexer_input(lexerinput_t* input, char* buf, size_t max_size, int nullvalue)
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{
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switch (input->type)
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{
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case LEXINPUT_STDIO:
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if (feof(input->input.stdiofile))
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{
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buf[0] = EOF;
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return nullvalue;
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}
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else
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{
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return fread(buf, 1, max_size, input->input.stdiofile);
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}
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break;
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case LEXINPUT_PHYSFS:
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if (PHYSFS_eof(input->input.physfsfile))
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{
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buf[0] = EOF;
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return nullvalue;
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}
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else
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{
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int result = PHYSFS_read(input->input.physfsfile, buf, 1, max_size);
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if (result == -1)
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{
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buf[0] = EOF;
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return nullvalue;
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}
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return result;
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}
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break;
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case LEXINPUT_BUFFER:
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if (input->input.buffer.begin != input->input.buffer.end)
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{
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buf[0] = *input->input.buffer.begin++;
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return 1;
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}
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else
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{
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buf[0] = EOF;
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return nullvalue;
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}
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break;
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}
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ASSERT(!"Invalid input type!", "Invalid input type used for lexer (numeric value: %u)", (unsigned int)input->type);
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return nullvalue;
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}
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