--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/preprocessor.cxx Fri Jan 10 16:11:49 2014 +0200
@@ -0,0 +1,126 @@
+/*
+ * botc source code
+ * Copyright (C) 2012 Santeri `Dusk` Piippo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of the developer nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 4. Redistributions in any form must be accompanied by information on how to
+ * obtain complete source code for the software and any accompanying
+ * software that uses the software. The source code must either be included
+ * in the distribution or be available for no more than the cost of
+ * distribution plus a nominal fee, and must be freely redistributable
+ * under reasonable conditions. For an executable file, complete source
+ * code means the source code for all modules it contains. It does not
+ * include source code for modules or files that typically accompany the
+ * major components of the operating system on which the executable file
+ * runs.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define __PARSER_CXX__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "common.h"
+#include "str.h"
+#include "scriptreader.h"
+
+/* Since the preprocessor is *called* from ReadChar and I don't want
+ * to worry about recursive preprocessing, the preprocessor uses its
+ * own bare-bones variant of the function for file reading.
+ */
+char ScriptReader::PPReadChar () {
+ char c;
+ if (!fread (&c, sizeof (char), 1, fp[fc]))
+ return 0;
+ curchar[fc]++;
+ return c;
+}
+
+void ScriptReader::PPMustChar (char c) {
+ char d = PPReadChar ();
+ if (c != d)
+ ParserError ("expected `%c`, got `%d`", c, d);
+}
+
+// ============================================================================
+// Reads a word until whitespace
+str ScriptReader::PPReadWord (char &term) {
+ str word;
+ while (1) {
+ char c = PPReadChar();
+ if (feof (fp[fc]) || (IsCharWhitespace (c) && word.len ())) {
+ term = c;
+ break;
+ }
+ word += c;
+ }
+ return word;
+}
+
+// ============================================================================
+// Preprocess any directives found in the script file
+void ScriptReader::PreprocessDirectives () {
+ size_t spos = ftell (fp[fc]);
+ if (!DoDirectivePreprocessing ())
+ fseek (fp[fc], spos, SEEK_SET);
+}
+
+/* ============================================================================
+ * Returns true if the pre-processing was successful, false if not.
+ * If pre-processing was successful, the file pointer remains where
+ * it was, if not, it's pushed back to where it was before preprocessing
+ * took place and is parsed normally.
+ */
+bool ScriptReader::DoDirectivePreprocessing () {
+ char trash;
+ // Directives start with a pound sign
+ if (PPReadChar() != '#')
+ return false;
+
+ // Read characters until next whitespace to
+ // build the name of the directive
+ str directive = PPReadWord (trash);
+
+ // Now check the directive name against known names
+ if (directive == "include") {
+ // #include-directive
+ char terminator;
+ str file = PPReadWord (terminator);
+
+ if (!file.len())
+ ParserError ("expected file name for #include, got nothing instead");
+ OpenFile (file);
+ return true;
+ } else if (directive == "neurosphere") {
+ // #neurosphere - activates neurosphere compatibility, aka stuff
+ // that is still WIP and what main zandronum does not yet support.
+ // Most end users should never need this.
+ g_Neurosphere = true;
+ return true;
+ }
+
+ ParserError ("unknown directive `#%s`!", directive.chars());
+ return false;
+}
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