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-rw-r--r--tests/create_compress_files.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/tests/create_compress_files.c b/tests/create_compress_files.c
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \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;
+}