--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/scriptreader.cxx Fri Jul 13 17:20:51 2012 +0300
@@ -0,0 +1,167 @@
+/*
+ * 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 Skulltag Development Team 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "string.h"
+#include "str.h"
+#include "common.h"
+#include "scriptreader.h"
+
+bool IsWhitespace (char c) {
+ // These characters are invisible, thus considered whitespace
+ if (c <= 32 || c == 127 || c == 255)
+ return true;
+
+ return false;
+}
+
+ScriptReader::ScriptReader (str path) {
+ fp = fopen (path, "r");
+ CHECK_FILE (path, "reading");
+
+ curline = 1;
+ pos = 0;
+ token = "";
+}
+
+char ScriptReader::ReadChar () {
+ char* c = (char*)malloc (sizeof (char));
+ if (!fread (c, sizeof (char), 1, fp))
+ return 0;
+
+ // If we just read a new line, increase current line number counter.
+ if (c[0] == '\n')
+ curline++;
+
+ return c[0];
+}
+
+// true if was found, false if not.
+bool ScriptReader::Next () {
+ str tmp = "";
+ bool quote = false;
+ tokenquoted = false;
+ while (!feof (fp)) {
+ char c = ReadChar ();
+
+ // Quotation mark.
+ if (c == '"') {
+ // End-quote ends the token.
+ if (quote)
+ break;
+
+ tokenquoted = true;
+ quote = !quote;
+ continue;
+ }
+
+ if (IsWhitespace (c) && !quote) {
+ // Don't break if we haven't gathered anything yet.
+ if (tmp.len())
+ break;
+ } else {
+ tmp += c;
+ }
+ }
+
+ // If we got nothing here, read failed.
+ if (!tmp.len()) {
+ token = "";
+ return false;
+ }
+
+ pos++;
+ token = tmp;
+ return true;
+}
+
+// Returns the next token without advancing the cursor.
+str ScriptReader::PeekNext () {
+ // Store current position
+ int cpos = ftell (fp);
+
+ // Advance on the token.
+ if (!Next ())
+ return "";
+
+ str tmp = token;
+
+ // Restore position
+ fseek (fp, cpos, SEEK_SET);
+ pos--;
+
+ return tmp;
+}
+
+void ScriptReader::Seek (unsigned int n, int origin) {
+ switch (origin) {
+ case SEEK_SET:
+ fseek (fp, 0, SEEK_SET);
+ pos = 0;
+ break;
+ case SEEK_CUR:
+ break;
+ case SEEK_END:
+ printf ("ScriptReader::Seek: SEEK_END not yet supported.\n");
+ break;
+ }
+
+ for (unsigned int i = 0; i < n+1; i++)
+ Next();
+}
+
+void ScriptReader::MustNext (const char* c) {
+ if (!Next()) {
+ if (strlen (c))
+ ParseError ("expected `%s`, reached end of file instead\n", c);
+ else
+ ParseError ("expected a token, reached end of file instead\n");
+ }
+
+ if (strlen (c) && token.compare (c) != 0) {
+ ParseError ("expected `%s`, got `%s` instead", c, token.chars());
+ }
+}
+
+void ScriptReader::ParseError (const char* message, ...) {
+ PERFORM_FORMAT (message, outmessage);
+ error ("Parse error on line %d:\n%s\n", curline, outmessage);
+}
\ No newline at end of file