Added test_compress.sh and bunch of files needed by it.

This new set of tests compress and decompress several
test files with many different compression options.
This set of tests will be extended later.

1 files changed, 164 insertions, 0 deletions

diff --git a/tests/create_compress_files.c b/tests/create_compress_files.c
new file mode 100644
index 00000000..2e394297
--- /dev/null
+++ b/tests/create_compress_files.c
@@ -0,0 +1,164 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       create_compress_files.c
+/// \brief      Creates bunch of test files to be compressed
+///
+/// Using a test file generator program saves space in the source code
+/// package considerably.
+//
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library 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
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+#include <stdio.h>
+
+
+// Avoid re-creating the test files every time the tests are run.
+#define create_test(name) \
+do { \
+	if (!file_exists("compress_generated_" #name)) { \
+		FILE *file = file_create("compress_generated_" #name); \
+		write_ ## name(file); \
+		file_finish(file, "compress_generated_" #name); \
+	} \
+} while (0)
+
+
+static bool
+file_exists(const char *filename)
+{
+	// Trying to be somewhat portable by avoiding stat().
+	FILE *file = fopen(filename, "rb");
+	bool ret;
+
+	if (file != NULL) {
+		fclose(file);
+		ret = true;
+	} else {
+		ret = false;
+	}
+
+	return ret;
+}
+
+
+static FILE *
+file_create(const char *filename)
+{
+	FILE *file = fopen(filename, "wb");
+
+	if (file == NULL) {
+		perror(filename);
+		exit(1);
+	}
+
+	return file;
+}
+
+
+static void
+file_finish(FILE *file, const char *filename)
+{
+	const bool ferror_fail = ferror(file);
+	const bool fclose_fail = fclose(file);
+
+	if (ferror_fail || fclose_fail) {
+		perror(filename);
+		exit(1);
+	}
+}
+
+
+// File that repeats "abc\n" a few thousand times. This is targeted
+// especially at Subblock filter's run-length encoder.
+static void
+write_abc(FILE *file)
+{
+	for (size_t i = 0; i < 12345; ++i)
+		fwrite("abc\n", 4, 1, file);
+}
+
+
+// File that doesn't compress. We always use the same random seed to
+// generate identical files on all systems.
+static void
+write_random(FILE *file)
+{
+	uint32_t n = 5;
+
+	for (size_t i = 0; i < 123456; ++i) {
+		n = 101771 * n + 71777;
+
+		putc(n & 0xFF, file);
+		putc((n >> 8) & 0xFF, file);
+		putc((n >> 16) & 0xFF, file);
+		putc(n >> 24, file);
+	}
+}
+
+
+// Text file
+static void
+write_text(FILE *file)
+{
+	static const char *lorem[] = {
+		"Lorem", "ipsum", "dolor", "sit", "amet,", "consectetur",
+		"adipisicing", "elit,", "sed", "do", "eiusmod", "tempor",
+		"incididunt", "ut", "labore", "et", "dolore", "magna",
+		"aliqua.", "Ut", "enim", "ad", "minim", "veniam,", "quis",
+		"nostrud", "exercitation", "ullamco", "laboris", "nisi",
+		"ut", "aliquip", "ex", "ea", "commodo", "consequat.",
+		"Duis", "aute", "irure", "dolor", "in", "reprehenderit",
+		"in", "voluptate", "velit", "esse", "cillum", "dolore",
+		"eu", "fugiat", "nulla", "pariatur.", "Excepteur", "sint",
+		"occaecat", "cupidatat", "non", "proident,", "sunt", "in",
+		"culpa", "qui", "officia", "deserunt", "mollit", "anim",
+		"id", "est", "laborum."
+	};
+
+	// Let the first paragraph be the original text.
+	for (size_t w = 0; w < ARRAY_SIZE(lorem); ++w) {
+		fprintf(file, "%s ", lorem[w]);
+
+		if (w % 7 == 6)
+			fprintf(file, "\n");
+	}
+
+	// The rest shall be (hopefully) meaningless combinations of
+	// the same words.
+	uint32_t n = 29;
+
+	for (size_t p = 0; p < 500; ++p) {
+		fprintf(file, "\n\n");
+
+		for (size_t w = 0; w < ARRAY_SIZE(lorem); ++w) {
+			n = 101771 * n + 71777;
+
+			fprintf(file, "%s ", lorem[n % ARRAY_SIZE(lorem)]);
+
+			if (w % 7 == 6)
+				fprintf(file, "\n");
+		}
+	}
+}
+
+
+int
+main(void)
+{
+	create_test(abc);
+	create_test(random);
+	create_test(text);
+	return 0;
+}