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Diffstat (limited to 'tests/create_compress_files.c')
| -rw-r--r-- | tests/create_compress_files.c | 164 |
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; +} |