Add darts exercise

config.json

@@ -354,6 +354,14 @@
         "prerequisites": [],
         "difficulty": 5
       },
+      {
+        "slug": "darts",
+        "name": "Darts",
+        "uuid": "4ca6a71e-e422-4158-8968-b11ac98a90ee",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 5
+      },
       {
         "slug": "diamond",
         "name": "Diamond",

exercises/practice/darts/.docs/instructions.md

@@ -0,0 +1,31 @@
+# Instructions
+
+Calculate the points scored in a single toss of a Darts game.
+
+[Darts][darts] is a game where players throw darts at a [target][darts-target].
+
+In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:
+
+![Our dart scoreboard with values from a complete miss to a bullseye](https://assets.exercism.org/images/exercises/darts/darts-scoreboard.svg)
+
+- If the dart lands outside the target, player earns no points (0 points).
+- If the dart lands in the outer circle of the target, player earns 1 point.
+- If the dart lands in the middle circle of the target, player earns 5 points.
+- If the dart lands in the inner circle of the target, player earns 10 points.
+
+The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1.
+Of course, they are all centered at the same point — that is, the circles are [concentric][] defined by the coordinates (0, 0).
+
+Given a point in the target (defined by its [Cartesian coordinates][cartesian-coordinates] `x` and `y`, where `x` and `y` are [real][real-numbers]), calculate the correct score earned by a dart landing at that point.
+
+## Credit
+
+The scoreboard image was created by [habere-et-dispertire][habere-et-dispertire] using [Inkscape][inkscape].
+
+[darts]: https://en.wikipedia.org/wiki/Darts
+[darts-target]: https://en.wikipedia.org/wiki/Darts#/media/File:Darts_in_a_dartboard.jpg
+[concentric]: https://mathworld.wolfram.com/ConcentricCircles.html
+[cartesian-coordinates]: https://www.mathsisfun.com/data/cartesian-coordinates.html
+[real-numbers]: https://www.mathsisfun.com/numbers/real-numbers.html
+[habere-et-dispertire]: https://exercism.org/profiles/habere-et-dispertire
+[inkscape]: https://en.wikipedia.org/wiki/Inkscape

exercises/practice/darts/.meta/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [
+    "keiravillekode"
+  ],
+  "files": {
+    "solution": [
+      "darts.s"
+    ],
+    "test": [
+      "darts_test.c"
+    ],
+    "example": [
+      ".meta/example.s"
+    ]
+  },
+  "blurb": "Calculate the points scored in a single toss of a Darts game.",
+  "source": "Inspired by an exercise created by a professor Della Paolera in Argentina"
+}

exercises/practice/darts/.meta/example.s

@@ -0,0 +1,38 @@
+.text
+.globl score
+
+/* extern int score(double x, double y); */
+score:
+        fmul d0, d0, d0                 /* x * x */
+        fmadd d0, d1, d1, d0            /* y * y + x * x */
+
+        mov w9, #100
+        ucvtf d2, w9
+        fcmpe d0, d2
+        bgt .zero
+
+        mov w9, #25
+        ucvtf d2, w9
+        fcmpe d0, d2
+        bgt .one
+
+        mov w9, #1
+        ucvtf d2, w9
+        fcmpe d0, d2
+        bgt .five
+
+.ten:
+        mov x0, #10
+        ret
+
+.five:
+        mov x0, #5
+        ret
+
+.one:
+        mov x0, #1
+        ret
+
+.zero:
+        mov x0, #0
+        ret

exercises/practice/darts/.meta/tests.toml

@@ -0,0 +1,49 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[9033f731-0a3a-4d9c-b1c0-34a1c8362afb]
+description = "Missed target"
+
+[4c9f6ff4-c489-45fd-be8a-1fcb08b4d0ba]
+description = "On the outer circle"
+
+[14378687-ee58-4c9b-a323-b089d5274be8]
+description = "On the middle circle"
+
+[849e2e63-85bd-4fed-bc3b-781ae962e2c9]
+description = "On the inner circle"
+
+[1c5ffd9f-ea66-462f-9f06-a1303de5a226]
+description = "Exactly on center"
+
+[b65abce3-a679-4550-8115-4b74bda06088]
+description = "Near the center"
+
+[66c29c1d-44f5-40cf-9927-e09a1305b399]
+description = "Just within the inner circle"
+
+[d1012f63-c97c-4394-b944-7beb3d0b141a]
+description = "Just outside the inner circle"
+
+[ab2b5666-b0b4-49c3-9b27-205e790ed945]
+description = "Just within the middle circle"
+
+[70f1424e-d690-4860-8caf-9740a52c0161]
+description = "Just outside the middle circle"
+
+[a7dbf8db-419c-4712-8a7f-67602b69b293]
+description = "Just within the outer circle"
+
+[e0f39315-9f9a-4546-96e4-a9475b885aa7]
+description = "Just outside the outer circle"
+
+[045d7d18-d863-4229-818e-b50828c75d19]
+description = "Asymmetric position between the inner and middle circles"

exercises/practice/darts/Makefile

@@ -0,0 +1,36 @@
+AS = aarch64-linux-gnu-as
+CC = aarch64-linux-gnu-gcc
+
+CFLAGS = -g -Wall -Wextra -pedantic -Werror
+LDFLAGS =
+
+ALL_LDFLAGS = -pie -Wl,--fatal-warnings
+
+ALL_CFLAGS = -std=c99 -fPIE $(CFLAGS)
+ALL_LDFLAGS += $(LDFLAGS)
+
+C_OBJS = $(patsubst %.c,%.o,$(wildcard *.c))
+AS_OBJS = $(patsubst %.s,%.o,$(wildcard *.s))
+ALL_OBJS = $(filter-out example.o,$(C_OBJS) $(AS_OBJS) vendor/unity.o)
+
+CC_CMD = $(CC) $(ALL_CFLAGS) -c -o $@ $<
+
+all: tests
+	qemu-aarch64 -L /usr/aarch64-linux-gnu ./$<
+
+tests: $(ALL_OBJS)
+	@$(CC) $(ALL_CFLAGS) $(ALL_LDFLAGS) -o $@ $(ALL_OBJS)
+
+%.o: %.s
+	@$(AS) -o $@ $<
+
+%.o: %.c
+	@$(CC_CMD)
+
+vendor/unity.o: vendor/unity.c vendor/unity.h vendor/unity_internals.h
+	@$(CC_CMD)
+
+clean:
+	@rm -f *.o vendor/*.o tests
+
+.PHONY: all clean

exercises/practice/darts/darts.s

@@ -0,0 +1,5 @@
+.text
+.globl score
+
+score:
+    ret

exercises/practice/darts/darts_test.c

@@ -0,0 +1,91 @@
+#include "vendor/unity.h"
+
+extern int score(double x, double y);
+
+void setUp(void) {
+}
+
+void tearDown(void) {
+}
+
+void test_missed_target(void) {
+    TEST_ASSERT_EQUAL_INT(0, score(-9, 9));
+}
+
+void test_on_the_outer_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(1, score(0, 10));
+}
+
+void test_on_the_middle_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(5, score(-5, 0));
+}
+
+void test_on_the_inner_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(10, score(0, -1));
+}
+
+void test_exactly_on_center(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(10, score(0, 0));
+}
+
+void test_near_the_center(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(10, score(-0.1, -0.1));
+}
+
+void test_just_within_the_inner_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(10, score(0.7, 0.7));
+}
+
+void test_just_outside_the_inner_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(5, score(0.8, -0.8));
+}
+
+void test_just_within_the_middle_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(5, score(-3.5, 3.5));
+}
+
+void test_just_outside_the_middle_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(1, score(-3.6, -3.6));
+}
+
+void test_just_within_the_outer_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(1, score(-7.0, 7.0));
+}
+
+void test_just_outside_the_outer_circle(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(0, score(7.1, -7.1));
+}
+
+void test_asymmetric_position_between_the_inner_and_middle_circles(void) {
+    TEST_IGNORE();
+    TEST_ASSERT_EQUAL_INT(5, score(0.5, -4));
+}
+
+int main(void) {
+    UNITY_BEGIN();
+    RUN_TEST(test_missed_target);
+    RUN_TEST(test_on_the_outer_circle);
+    RUN_TEST(test_on_the_middle_circle);
+    RUN_TEST(test_on_the_inner_circle);
+    RUN_TEST(test_exactly_on_center);
+    RUN_TEST(test_near_the_center);
+    RUN_TEST(test_just_within_the_inner_circle);
+    RUN_TEST(test_just_outside_the_inner_circle);
+    RUN_TEST(test_just_within_the_middle_circle);
+    RUN_TEST(test_just_outside_the_middle_circle);
+    RUN_TEST(test_just_within_the_outer_circle);
+    RUN_TEST(test_just_outside_the_outer_circle);
+    RUN_TEST(test_asymmetric_position_between_the_inner_and_middle_circles);
+    return UNITY_END();
+}