158 lines
3.4 KiB
C
158 lines
3.4 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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/// \file create_compress_files.c
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/// \brief Creates bunch of test files to be compressed
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///
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/// Using a test file generator program saves space in the source code
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/// package considerably.
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//
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// Author: Lasse Collin
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//
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// This file has been put into the public domain.
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// You can do whatever you want with this file.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "sysdefs.h"
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#include <stdio.h>
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// Avoid re-creating the test files every time the tests are run.
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#define create_test(name) \
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do { \
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if (!file_exists("compress_generated_" #name)) { \
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FILE *file = file_create("compress_generated_" #name); \
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write_ ## name(file); \
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file_finish(file, "compress_generated_" #name); \
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} \
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} while (0)
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static bool
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file_exists(const char *filename)
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{
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// Trying to be somewhat portable by avoiding stat().
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FILE *file = fopen(filename, "rb");
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bool ret;
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if (file != NULL) {
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fclose(file);
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ret = true;
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} else {
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ret = false;
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}
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return ret;
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}
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static FILE *
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file_create(const char *filename)
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{
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FILE *file = fopen(filename, "wb");
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if (file == NULL) {
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perror(filename);
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exit(1);
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}
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return file;
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}
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static void
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file_finish(FILE *file, const char *filename)
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{
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const bool ferror_fail = ferror(file);
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const bool fclose_fail = fclose(file);
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if (ferror_fail || fclose_fail) {
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perror(filename);
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exit(1);
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}
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}
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// File that repeats "abc\n" a few thousand times. This is targeted
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// especially at Subblock filter's run-length encoder.
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static void
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write_abc(FILE *file)
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{
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for (size_t i = 0; i < 12345; ++i)
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fwrite("abc\n", 4, 1, file);
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}
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// File that doesn't compress. We always use the same random seed to
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// generate identical files on all systems.
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static void
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write_random(FILE *file)
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{
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uint32_t n = 5;
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for (size_t i = 0; i < 123456; ++i) {
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n = 101771 * n + 71777;
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putc(n & 0xFF, file);
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putc((n >> 8) & 0xFF, file);
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putc((n >> 16) & 0xFF, file);
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putc(n >> 24, file);
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}
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}
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// Text file
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static void
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write_text(FILE *file)
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{
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static const char *lorem[] = {
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"Lorem", "ipsum", "dolor", "sit", "amet,", "consectetur",
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"adipisicing", "elit,", "sed", "do", "eiusmod", "tempor",
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"incididunt", "ut", "labore", "et", "dolore", "magna",
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"aliqua.", "Ut", "enim", "ad", "minim", "veniam,", "quis",
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"nostrud", "exercitation", "ullamco", "laboris", "nisi",
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"ut", "aliquip", "ex", "ea", "commodo", "consequat.",
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"Duis", "aute", "irure", "dolor", "in", "reprehenderit",
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"in", "voluptate", "velit", "esse", "cillum", "dolore",
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"eu", "fugiat", "nulla", "pariatur.", "Excepteur", "sint",
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"occaecat", "cupidatat", "non", "proident,", "sunt", "in",
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"culpa", "qui", "officia", "deserunt", "mollit", "anim",
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"id", "est", "laborum."
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};
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// Let the first paragraph be the original text.
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for (size_t w = 0; w < ARRAY_SIZE(lorem); ++w) {
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fprintf(file, "%s ", lorem[w]);
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if (w % 7 == 6)
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fprintf(file, "\n");
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}
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// The rest shall be (hopefully) meaningless combinations of
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// the same words.
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uint32_t n = 29;
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for (size_t p = 0; p < 500; ++p) {
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fprintf(file, "\n\n");
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for (size_t w = 0; w < ARRAY_SIZE(lorem); ++w) {
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n = 101771 * n + 71777;
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fprintf(file, "%s ", lorem[n % ARRAY_SIZE(lorem)]);
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if (w % 7 == 6)
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fprintf(file, "\n");
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}
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}
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}
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int
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main(void)
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{
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create_test(abc);
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create_test(random);
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create_test(text);
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return 0;
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}
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