commit 38a6ee0725ddc4eb57357a2398bc82dc8b264c7e
Author: Tom Willemse <tom@ryuslash.org>
Date:   Mon Oct 12 20:46:11 2020 -0700

    Initial commit

diff --git a/1/HelloWorldC/.gitignore b/1/HelloWorldC/.gitignore
new file mode 100644
index 0000000..28abb99
--- /dev/null
+++ b/1/HelloWorldC/.gitignore
@@ -0,0 +1,8 @@
+CMakeFiles/
+CMakeCache.txt
+cmake_install.cmake
+CTestTestfile.cmake
+HelloWorld
+Makefile
+HelloWorldExecutable
+Testing
diff --git a/1/HelloWorldC/CMakeLists.txt b/1/HelloWorldC/CMakeLists.txt
new file mode 100644
index 0000000..d235a0c
--- /dev/null
+++ b/1/HelloWorldC/CMakeLists.txt
@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.18)
+
+enable_testing()
+
+project(HelloWorld C)
+
+add_executable(HelloWorld main.c)
+
+find_library(CMocka cmocka)
+
+target_link_libraries(HelloWorld cmocka)
+
+add_test(
+  NAME HelloWorldTest
+  COMMAND HelloWorld)
+
+add_test(
+  NAME HelloWorldMemoryTest
+  COMMAND valgrind --error-exitcode=1 --leak-check=full $<TARGET_FILE:HelloWorld>)
diff --git a/1/HelloWorldC/main.c b/1/HelloWorldC/main.c
new file mode 100644
index 0000000..a2906d9
--- /dev/null
+++ b/1/HelloWorldC/main.c
@@ -0,0 +1,297 @@
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+#include <string.h>
+
+struct double_linked_list {
+  struct double_linked_list *prev;
+  struct double_linked_list *next;
+  char *data;
+};
+
+struct double_linked_list *
+make_double_linked_list(char *data)
+{
+  struct double_linked_list *list =
+    (struct double_linked_list *)malloc(sizeof(struct double_linked_list));
+
+  list->data = data;
+  list->prev = NULL;
+  list->next = NULL;
+
+  return list;
+}
+
+void
+insert_double_linked_list_before(struct double_linked_list *list, char *data)
+{
+  struct double_linked_list *prev = make_double_linked_list(data);
+
+  if (list->prev != NULL) {
+    prev->prev = list->prev;
+  }
+
+  list->prev = prev;
+}
+
+void
+insert_double_linked_list_after(struct double_linked_list *list, char *data)
+{
+  struct double_linked_list *next = make_double_linked_list(data);
+
+  if (list->next != NULL) {
+    next->next = list->next;
+  }
+
+  list->next = next;
+}
+
+void
+free_double_linked_list(struct double_linked_list *list)
+{
+  if (list != NULL) {
+    if (list->data != NULL) {
+      free(list->data);
+    }
+
+    struct double_linked_list *prev = list->prev;
+    while (prev != NULL) {
+      struct double_linked_list *inner = prev;
+      prev = prev->prev;
+
+      free(inner->data);
+      free(inner);
+    }
+
+    struct double_linked_list *next = list->next;
+    while (next != NULL) {
+      struct double_linked_list *inner = next;
+      next = next->next;
+
+      free(inner->data);
+      free(inner);
+    }
+
+    free(list);
+  }
+}
+
+static void
+test_double_linked_list_initialized_prev_null(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+
+  assert_null(list->prev);
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_initialized_next_null(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+
+  assert_null(list->next);
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_initialized_with_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+
+  assert_string_equal(list->data, "foo");
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_before_prev_not_null(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *beforeData = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "bar");
+
+  insert_double_linked_list_before(list, beforeData);
+
+  assert_non_null(list->prev);
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_before_prev_is_inserted_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *beforeData = (char *)malloc(sizeof(char) * 4);
+  strcpy(beforeData, "bar");
+
+  insert_double_linked_list_before(list, beforeData);
+
+  assert_string_equal(list->prev->data, "bar");
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_multiple_prev_adds_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *beforeBeforeData = (char *)malloc(sizeof(char) * 4);
+  strcpy(beforeBeforeData, "bar");
+  char *beforeData = (char *)malloc(sizeof(char) * 4);
+  strcpy(beforeData, "qux");
+
+  insert_double_linked_list_before(list, beforeBeforeData);
+  insert_double_linked_list_before(list, beforeData);
+
+  assert_non_null(list->prev->prev);
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_multiple_prev_adds_data_with_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *beforeBeforeData = (char *)malloc(sizeof(char) * 4);
+  strcpy(beforeBeforeData, "bar");
+  char *beforeData = (char *)malloc(sizeof(char) * 4);
+  strcpy(beforeData, "qux");
+
+  insert_double_linked_list_before(list, beforeBeforeData);
+  insert_double_linked_list_before(list, beforeData);
+
+  assert_string_equal(list->prev->prev->data, "bar");
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_after_next_not_null(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *afterData = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "bar");
+
+  insert_double_linked_list_after(list, afterData);
+
+  assert_non_null(list->next);
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_after_next_is_inserted_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *afterData = (char *)malloc(sizeof(char) * 4);
+  strcpy(afterData, "bar");
+
+  insert_double_linked_list_after(list, afterData);
+
+  assert_string_equal(list->next->data, "bar");
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_multiple_next_adds_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *afterAfterData = (char *)malloc(sizeof(char) * 4);
+  strcpy(afterAfterData, "bar");
+  char *afterData = (char *)malloc(sizeof(char) * 4);
+  strcpy(afterData, "qux");
+
+  insert_double_linked_list_after(list, afterAfterData);
+  insert_double_linked_list_after(list, afterData);
+
+  assert_non_null(list->next->next);
+
+  free_double_linked_list(list);
+}
+
+static void
+test_double_linked_list_insert_multiple_next_adds_data_with_data(void **state)
+{
+  (void)state;
+
+  char *data = (char *)malloc(sizeof(char) * 4);
+  strcpy(data, "foo");
+  struct double_linked_list *list = make_double_linked_list(data);
+  char *afterAfterData = (char *)malloc(sizeof(char) * 4);
+  strcpy(afterAfterData, "bar");
+  char *afterData = (char *)malloc(sizeof(char) * 4);
+  strcpy(afterData, "qux");
+
+  insert_double_linked_list_after(list, afterAfterData);
+  insert_double_linked_list_after(list, afterData);
+
+  assert_string_equal(list->next->next->data, "bar");
+
+  free_double_linked_list(list);
+}
+
+int
+main()
+{
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_double_linked_list_initialized_prev_null),
+    cmocka_unit_test(test_double_linked_list_initialized_next_null),
+    cmocka_unit_test(test_double_linked_list_initialized_with_data),
+    cmocka_unit_test(test_double_linked_list_insert_before_prev_not_null),
+    cmocka_unit_test(test_double_linked_list_insert_before_prev_is_inserted_data),
+    cmocka_unit_test(test_double_linked_list_insert_multiple_prev_adds_data),
+    cmocka_unit_test(test_double_linked_list_insert_multiple_prev_adds_data_with_data),
+    cmocka_unit_test(test_double_linked_list_insert_after_next_not_null),
+    cmocka_unit_test(test_double_linked_list_insert_after_next_is_inserted_data),
+    cmocka_unit_test(test_double_linked_list_insert_multiple_next_adds_data),
+    cmocka_unit_test(test_double_linked_list_insert_multiple_next_adds_data_with_data),
+  };
+
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/1/HelloWorldJava/.gitignore b/1/HelloWorldJava/.gitignore
new file mode 100644
index 0000000..6d0e1d5
--- /dev/null
+++ b/1/HelloWorldJava/.gitignore
@@ -0,0 +1,8 @@
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+CTestTestfile.cmake
+*.jar
+Makefile
+HelloWorld
+Testing
diff --git a/1/HelloWorldJava/CMakeLists.txt b/1/HelloWorldJava/CMakeLists.txt
new file mode 100644
index 0000000..d03d617
--- /dev/null
+++ b/1/HelloWorldJava/CMakeLists.txt
@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 2.8)
+
+find_package(Java REQUIRED)
+include(UseJava)
+
+enable_testing()
+
+project(HelloWorldJava NONE)
+
+add_jar(HelloWorldJava HelloWorld/HelloWorldJava.java)
+
+get_target_property(_jarFile HelloWorldJava JAR_FILE)
+get_target_property(_classDir HelloWorldJava CLASSDIR)
+
+message(STATUS "Jar file ${_jarFile}")
+message(STATUS "Class compiled to ${_classDir}")
+
+add_test(
+  NAME TestHelloWorldJava
+  COMMAND ${Java_JAVA_EXECUTABLE} -cp ${_jarFile} HelloWorld/HelloWorldJava)
diff --git a/1/assignments.org b/1/assignments.org
new file mode 100644
index 0000000..ae40227
--- /dev/null
+++ b/1/assignments.org
@@ -0,0 +1,3 @@
+- There are at least six domain-specific languages used in the little system I cobbled together to write and publish this book. What are they?
+
+  They are at the very least: Make, HTML, CSS, Sass, Markdown, Mustache, XML, Yaml, Dart(?)