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atari800/src/colours_external.c

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+/*
+ * colours_external.c - Loading external colour palettes
+ *
+ * Copyright (C) 1995-1998 David Firth
+ * Copyright (C) 1998-2009 Atari800 development team (see DOC/CREDITS)
+ *
+ * This file is part of the Atari800 emulator project which emulates
+ * the Atari 400, 800, 800XL, 130XE, and 5200 8-bit computers.
+ *
+ * Atari800 is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Atari800 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Atari800; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "atari.h" /* for TRUE/FALSE */
+#include "colours_external.h"
+#include "util.h"
+
+int COLOURS_EXTERNAL_Read(COLOURS_EXTERNAL_t *colours)
+{
+	FILE *fp;
+	int i;
+	unsigned char *pal_ptr;
+
+	fp = fopen(colours->filename, "rb");
+	if (fp == NULL) {
+		colours->loaded = FALSE;
+		return FALSE;
+	}
+	for (i = 0, pal_ptr = colours->palette; i < 768; i++) {
+		int c = fgetc(fp);
+		if (c == EOF) {
+			fclose(fp);
+			colours->loaded = FALSE;
+			return FALSE;
+		}
+		*pal_ptr++ = c;
+	}
+	fclose(fp);
+	colours->loaded = TRUE;
+	return TRUE;
+}
+
+void COLOURS_EXTERNAL_Remove(COLOURS_EXTERNAL_t *colours)
+{
+	colours->loaded = FALSE;
+}
+
+int COLOURS_EXTERNAL_ReadFilename(COLOURS_EXTERNAL_t *colours, char *filename)
+{
+	Util_strlcpy(colours->filename, filename, FILENAME_MAX);
+	return COLOURS_EXTERNAL_Read(colours);
+}