From f8217d240d598f39f70047f7a623dd46312542c6 Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 4 Dec 2021 16:01:12 -0800
Subject: Initial commit.
---
list/CMakeLists.txt | 23 +++++++
list/include/list.h | 21 ++++++
list/src/list.c | 14 ++++
list/test/list_test.c | 34 ++++++++++
list/test/test.h | 185 ++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 277 insertions(+)
create mode 100644 list/CMakeLists.txt
create mode 100644 list/include/list.h
create mode 100644 list/src/list.c
create mode 100644 list/test/list_test.c
create mode 100644 list/test/test.h
(limited to 'list')
diff --git a/list/CMakeLists.txt b/list/CMakeLists.txt
new file mode 100644
index 0000000..5d11d28
--- /dev/null
+++ b/list/CMakeLists.txt
@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(list)
+
+# Library
+
+add_library(list
+ src/list.c)
+
+target_include_directories(list PUBLIC
+ include)
+
+target_compile_options(list PRIVATE -Wall -Wextra)
+
+# Test
+
+add_executable(list_test
+ test/list_test.c)
+
+target_link_libraries(list_test
+ list)
+
+target_compile_options(list_test PRIVATE -DUNIT_TEST -Wall -Wextra)
diff --git a/list/include/list.h b/list/include/list.h
new file mode 100644
index 0000000..b00b48b
--- /dev/null
+++ b/list/include/list.h
@@ -0,0 +1,21 @@
+/// A doubly linked list.
+///
+/// This list does not hold user data. Instead, the list can be used as an
+/// intrusive list or as part as a more complex data structure.
+#pragma once
+
+#include <stddef.h>
+
+typedef struct list list;
+
+typedef struct list {
+ list* prev;
+ list* next;
+} list;
+
+/// Create a new list from an array of `size` items.
+void list_make(list* list, size_t size);
+
+/// Iterates over all the items in the list.
+#define list_foreach(LIST, iter) \
+ for (struct list* iter = LIST; iter; iter = iter->next)
diff --git a/list/src/list.c b/list/src/list.c
new file mode 100644
index 0000000..f5b6507
--- /dev/null
+++ b/list/src/list.c
@@ -0,0 +1,14 @@
+#include "list.h"
+
+#include <assert.h>
+
+void list_make(list* list, size_t size) {
+ if (size == 0) {
+ return;
+ }
+ assert(list);
+ for (size_t i = 0; i < size; ++i) {
+ list[i].prev = (i == 0 ? 0 : &list[i - 1]);
+ list[i].next = (i == size - 1 ? 0 : &list[i + 1]);
+ }
+}
diff --git a/list/test/list_test.c b/list/test/list_test.c
new file mode 100644
index 0000000..a11c713
--- /dev/null
+++ b/list/test/list_test.c
@@ -0,0 +1,34 @@
+#include "list.h"
+
+#include "test.h"
+
+#define TEST_LIST_SIZE 10
+
+// Create an empty list.
+TEST_CASE(list_create_empty) { list_make(0, 0); }
+
+// Create a list of a given size.
+TEST_CASE(list_create) {
+ struct list list[TEST_LIST_SIZE];
+ list_make(list, TEST_LIST_SIZE);
+}
+
+// Iterate over a list.
+TEST_CASE(list_traverse) {
+ int numbers[TEST_LIST_SIZE] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+
+ struct list list[TEST_LIST_SIZE];
+ list_make(list, TEST_LIST_SIZE);
+
+ int count = 0;
+ int sum = 0;
+ list_foreach(list, item) {
+ count++;
+ sum += numbers[item - list];
+ }
+
+ TEST_EQUAL(count, TEST_LIST_SIZE);
+ TEST_EQUAL(sum, TEST_LIST_SIZE * (TEST_LIST_SIZE + 1) / 2);
+}
+
+int main() { return 0; }
diff --git a/list/test/test.h b/list/test/test.h
new file mode 100644
index 0000000..fd8dc22
--- /dev/null
+++ b/list/test/test.h
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: MIT
+#pragma once
+
+#ifdef UNIT_TEST
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
+ defined(__NetBSD__) || defined(__OpenBSD__)
+#define USE_SYSCTL_FOR_ARGS 1
+// clang-format off
+#include <sys/types.h>
+#include <sys/sysctl.h>
+// clang-format on
+#include <unistd.h> // getpid
+#endif
+
+struct test_file_metadata;
+
+struct test_failure {
+ bool present;
+ const char *message;
+ const char *file;
+ int line;
+};
+
+struct test_case_metadata {
+ void (*fn)(struct test_case_metadata *, struct test_file_metadata *);
+ struct test_failure failure;
+ const char *name;
+ struct test_case_metadata *next;
+};
+
+struct test_file_metadata {
+ bool registered;
+ const char *name;
+ struct test_file_metadata *next;
+ struct test_case_metadata *tests;
+};
+
+struct test_file_metadata __attribute__((weak)) * test_file_head;
+
+#define SET_FAILURE(_message) \
+ metadata->failure = (struct test_failure) { \
+ .message = _message, .file = __FILE__, .line = __LINE__, .present = true, \
+ }
+
+#define TEST_EQUAL(a, b) \
+ do { \
+ if ((a) != (b)) { \
+ SET_FAILURE(#a " != " #b); \
+ return; \
+ } \
+ } while (0)
+
+#define TEST_TRUE(a) \
+ do { \
+ if (!(a)) { \
+ SET_FAILURE(#a " is not true"); \
+ return; \
+ } \
+ } while (0)
+
+#define TEST_STREQUAL(a, b) \
+ do { \
+ if (strcmp(a, b) != 0) { \
+ SET_FAILURE(#a " != " #b); \
+ return; \
+ } \
+ } while (0)
+
+#define TEST_CASE(_name) \
+ static void __test_h_##_name(struct test_case_metadata *, \
+ struct test_file_metadata *); \
+ static struct test_file_metadata __test_h_file; \
+ static struct test_case_metadata __test_h_meta_##_name = { \
+ .name = #_name, \
+ .fn = __test_h_##_name, \
+ }; \
+ static void __attribute__((constructor(101))) __test_h_##_name##_register(void) { \
+ __test_h_meta_##_name.next = __test_h_file.tests; \
+ __test_h_file.tests = &__test_h_meta_##_name; \
+ if (!__test_h_file.registered) { \
+ __test_h_file.name = __FILE__; \
+ __test_h_file.next = test_file_head; \
+ test_file_head = &__test_h_file; \
+ __test_h_file.registered = true; \
+ } \
+ } \
+ static void __test_h_##_name( \
+ struct test_case_metadata *metadata __attribute__((unused)), \
+ struct test_file_metadata *file_metadata __attribute__((unused)))
+
+extern void __attribute__((weak)) (*test_h_unittest_setup)(void);
+/// Run defined tests, return true if all tests succeeds
+/// @param[out] tests_run if not NULL, set to whether tests were run
+static inline void __attribute__((constructor(102))) run_tests(void) {
+ bool should_run = false;
+#ifdef USE_SYSCTL_FOR_ARGS
+ int mib[] = {
+ CTL_KERN,
+#if defined(__NetBSD__) || defined(__OpenBSD__)
+ KERN_PROC_ARGS,
+ getpid(),
+ KERN_PROC_ARGV,
+#else
+ KERN_PROC,
+ KERN_PROC_ARGS,
+ getpid(),
+#endif
+ };
+ char *arg = NULL;
+ size_t arglen;
+ sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &arglen, NULL, 0);
+ arg = malloc(arglen);
+ sysctl(mib, sizeof(mib) / sizeof(mib[0]), arg, &arglen, NULL, 0);
+#else
+ FILE *cmdlinef = fopen("/proc/self/cmdline", "r");
+ char *arg = NULL;
+ int arglen;
+ fscanf(cmdlinef, "%ms%n", &arg, &arglen);
+ fclose(cmdlinef);
+#endif
+ for (char *pos = arg; pos < arg + arglen; pos += strlen(pos) + 1) {
+ if (strcmp(pos, "--unittest") == 0) {
+ should_run = true;
+ break;
+ }
+ }
+ free(arg);
+
+ if (!should_run) {
+ return;
+ }
+
+ if (&test_h_unittest_setup) {
+ test_h_unittest_setup();
+ }
+
+ struct test_file_metadata *i = test_file_head;
+ int failed = 0, success = 0;
+ while (i) {
+ fprintf(stderr, "Running tests from %s:\n", i->name);
+ struct test_case_metadata *j = i->tests;
+ while (j) {
+ fprintf(stderr, "\t%s ... ", j->name);
+ j->failure.present = false;
+ j->fn(j, i);
+ if (j->failure.present) {
+ fprintf(stderr, "failed (%s at %s:%d)\n", j->failure.message,
+ j->failure.file, j->failure.line);
+ failed++;
+ } else {
+ fprintf(stderr, "passed\n");
+ success++;
+ }
+ j = j->next;
+ }
+ fprintf(stderr, "\n");
+ i = i->next;
+ }
+ int total = failed + success;
+ fprintf(stderr, "Test results: passed %d/%d, failed %d/%d\n", success, total,
+ failed, total);
+ exit(failed == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
+#else
+
+#include <stdbool.h>
+
+#define TEST_CASE(name) static void __attribute__((unused)) __test_h_##name(void)
+
+#define TEST_EQUAL(a, b) \
+ (void)(a); \
+ (void)(b)
+#define TEST_TRUE(a) (void)(a)
+#define TEST_STREQUAL(a, b) \
+ (void)(a); \
+ (void)(b)
+
+#endif
--
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