test_buffer: add buffer playground

This test app is used to stress test the buffer implementation and finding bugs
of the scrollback-buffer rotations etc.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

Makefile.am

@@ -1,7 +1,7 @@
 ACLOCAL_AMFLAGS = -I m4
 
 bin_PROGRAMS = kmscon
-check_PROGRAMS = test_console test_output test_vt
+check_PROGRAMS = test_console test_output test_vt test_buffer
 noinst_LTLIBRARIES = libkmscon-core.la
 
 AM_CFLAGS = \
@@ -65,4 +65,7 @@ test_output_CPPFLAGS = \
 test_vt_SOURCES = tests/test_vt.c
 test_vt_LDADD = libkmscon-core.la
 
+test_buffer_SOURCES = tests/test_buffer.c
+test_buffer_LDADD = libkmscon-core.la
+
 dist_doc_DATA = README TODO

tests/test_buffer.c

@@ -0,0 +1,129 @@
+/*
+ * test_buffer - Test Buffer
+ *
+ * Copyright (c) 2011 David Herrmann <dh.herrmann@googlemail.com>
+ * Copyright (c) 2011 University of Tuebingen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * Test Buffer
+ * This runs some stress tests on the buffer implementation. It can also be used
+ * to run some performance benchmarks and similar.
+ * This does not access the display output or perform any other _useful_ action.
+ *
+ * Use this as playground for new buffer features.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "console.h"
+#include "log.h"
+
+/* print buffer with boundary */
+static void print_buf(struct kmscon_buffer *buf)
+{
+	unsigned int width, height, x, y;
+	struct kmscon_char *ch;
+	int ret;
+	const char *c;
+
+	ret = kmscon_char_new(&ch);
+	if (ret) {
+		log_warning("Cannot allocate character\n");
+		return;
+	}
+
+	width = kmscon_buffer_get_width(buf);
+	height = kmscon_buffer_get_height(buf);
+
+	log_info("Buffer: %ux%u\n", width, height);
+
+	printf("x");
+	for (x = 0; x < width; ++x)
+		printf("x");
+	printf("x\n");
+
+	for (y = 0; y < height; ++y) {
+		printf("x");
+		for (x = 0; x < width; ++x) {
+			kmscon_buffer_read(buf, x, y, ch);
+			c = kmscon_char_get_u8(ch);
+			printf("%c", c ? *c : ' ');
+		}
+		printf("x\n");
+	}
+
+	printf("x");
+	for (x = 0; x < width; ++x)
+		printf("x");
+	printf("x\n");
+
+	kmscon_char_free(ch);
+}
+
+static void test1(struct kmscon_buffer *buf)
+{
+	int ret;
+	struct kmscon_char *ch;
+
+	log_info("Test1:\n");
+
+	ret = kmscon_char_new_u8(&ch, "?", 1);
+	if (ret) {
+		log_err("Cannot create character\n");
+		return;
+	}
+
+	kmscon_buffer_write(buf, 0, 0, ch);
+	kmscon_buffer_write(buf, 9, 2, ch);
+	kmscon_buffer_write(buf, 4, 4, ch);
+	kmscon_buffer_rotate(buf);
+	print_buf(buf);
+	kmscon_buffer_resize(buf, 5, 3);
+	print_buf(buf);
+	kmscon_buffer_resize(buf, 10, 5);
+	print_buf(buf);
+	kmscon_buffer_rotate(buf);
+	print_buf(buf);
+
+	kmscon_char_free(ch);
+}
+
+int main(int argc, char **argv)
+{
+	struct kmscon_buffer *buf;
+	int ret;
+
+	ret = kmscon_buffer_new(&buf, 10, 5);
+	if (ret) {
+		log_err("Cannot create buffer object\n");
+		goto err_out;
+	}
+
+	test1(buf);
+
+	kmscon_buffer_unref(buf);
+err_out:
+	return abs(ret);
+}