Add rna-transcription exercise (#84)

config.json

@@ -122,6 +122,14 @@
         "prerequisites": [],
         "difficulty": 3
       },
+      {
+        "slug": "rna-transcription",
+        "name": "RNA Transcription",
+        "uuid": "ddfea5dc-0838-4a35-9936-1fb72cd7b1c4",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 3
+      },
       {
         "slug": "square-root",
         "name": "Square Root",

exercises/practice/rna-transcription/.docs/instructions.md

@@ -0,0 +1,20 @@
+# Instructions
+
+Your task is determine the RNA complement of a given DNA sequence.
+
+Both DNA and RNA strands are a sequence of nucleotides.
+
+The four nucleotides found in DNA are adenine (**A**), cytosine (**C**), guanine (**G**) and thymine (**T**).
+
+The four nucleotides found in RNA are adenine (**A**), cytosine (**C**), guanine (**G**) and uracil (**U**).
+
+Given a DNA strand, its transcribed RNA strand is formed by replacing each nucleotide with its complement:
+
+- `G` -> `C`
+- `C` -> `G`
+- `T` -> `A`
+- `A` -> `U`
+
+~~~~exercism/note
+If you want to look at how the inputs and outputs are structured, take a look at the examples in the test suite.
+~~~~

exercises/practice/rna-transcription/.docs/introduction.md

@@ -0,0 +1,16 @@
+# Introduction
+
+You work for a bioengineering company that specializes in developing therapeutic solutions.
+
+Your team has just been given a new project to develop a targeted therapy for a rare type of cancer.
+
+~~~~exercism/note
+It's all very complicated, but the basic idea is that sometimes people's bodies produce too much of a given protein.
+That can cause all sorts of havoc.
+
+But if you can create a very specific molecule (called a micro-RNA), it can prevent the protein from being produced.
+
+This technique is called [RNA Interference][rnai].
+
+[rnai]: https://admin.acceleratingscience.com/ask-a-scientist/what-is-rnai/
+~~~~

exercises/practice/rna-transcription/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "keiravillekode"
+  ],
+  "files": {
+    "solution": [
+      "rna_transcription.s"
+    ],
+    "test": [
+      "rna_transcription_test.c"
+    ],
+    "example": [
+      ".meta/example.s"
+    ]
+  },
+  "blurb": "Given a DNA strand, return its RNA Complement Transcription.",
+  "source": "Hyperphysics",
+  "source_url": "https://web.archive.org/web/20220408112140/http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html"
+}

exercises/practice/rna-transcription/.meta/example.s

@@ -0,0 +1,21 @@
+.text
+.globl to_rna
+
+.macro MAP from, to
+        mov     w4, \to
+        cmp     w2, \from
+        csel    w3, w4, w3, eq          /* conditionally update output byte */
+.endm
+
+/* extern void to_rna(char *buffer, const char *dna); */
+to_rna:
+        ldrb    w2, [x1], #1            /* load byte, with post-increment */
+        mov     w3, w2
+        MAP     #'G', #'C'
+        MAP     #'C', #'G'
+        MAP     #'T', #'A'
+        MAP     #'A', #'U'
+        strb    w3, [x0], #1            /* store byte, post-increment */
+        cbnz    w3, to_rna
+
+        ret

exercises/practice/rna-transcription/.meta/tests.toml

@@ -0,0 +1,28 @@
+# 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.
+
+[b4631f82-c98c-4a2f-90b3-c5c2b6c6f661]
+description = "Empty RNA sequence"
+
+[a9558a3c-318c-4240-9256-5d5ed47005a6]
+description = "RNA complement of cytosine is guanine"
+
+[6eedbb5c-12cb-4c8b-9f51-f8320b4dc2e7]
+description = "RNA complement of guanine is cytosine"
+
+[870bd3ec-8487-471d-8d9a-a25046488d3e]
+description = "RNA complement of thymine is adenine"
+
+[aade8964-02e1-4073-872f-42d3ffd74c5f]
+description = "RNA complement of adenine is uracil"
+
+[79ed2757-f018-4f47-a1d7-34a559392dbf]
+description = "RNA complement"

exercises/practice/rna-transcription/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/rna-transcription/rna_transcription.s

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

exercises/practice/rna-transcription/rna_transcription_test.c

@@ -0,0 +1,69 @@
+#include "vendor/unity.h"
+
+#define BUFFER_SIZE 80
+
+extern void to_rna(char *buffer, const char *dna);
+
+void setUp(void) {
+}
+
+void tearDown(void) {
+}
+
+void test_empty_rna_sequence(void) {
+    char buffer[BUFFER_SIZE];
+
+    to_rna(buffer, "");
+    TEST_ASSERT_EQUAL_STRING("", buffer);
+}
+
+void test_rna_complement_of_cytosine_is_guanine(void) {
+    TEST_IGNORE();
+    char buffer[BUFFER_SIZE];
+
+    to_rna(buffer, "C");
+    TEST_ASSERT_EQUAL_STRING("G", buffer);
+}
+
+void test_rna_complement_of_guanine_is_cytosine(void) {
+    TEST_IGNORE();
+    char buffer[BUFFER_SIZE];
+
+    to_rna(buffer, "G");
+    TEST_ASSERT_EQUAL_STRING("C", buffer);
+}
+
+void test_rna_complement_of_thymine_is_adenine(void) {
+    TEST_IGNORE();
+    char buffer[BUFFER_SIZE];
+
+    to_rna(buffer, "T");
+    TEST_ASSERT_EQUAL_STRING("A", buffer);
+}
+
+void test_rna_complement_of_adenine_is_uracil(void) {
+    TEST_IGNORE();
+    char buffer[BUFFER_SIZE];
+
+    to_rna(buffer, "A");
+    TEST_ASSERT_EQUAL_STRING("U", buffer);
+}
+
+void test_rna_complement(void) {
+    TEST_IGNORE();
+    char buffer[BUFFER_SIZE];
+
+    to_rna(buffer, "ACGTGGTCTTAA");
+    TEST_ASSERT_EQUAL_STRING("UGCACCAGAAUU", buffer);
+}
+
+int main(void) {
+    UNITY_BEGIN();
+    RUN_TEST(test_empty_rna_sequence);
+    RUN_TEST(test_rna_complement_of_cytosine_is_guanine);
+    RUN_TEST(test_rna_complement_of_guanine_is_cytosine);
+    RUN_TEST(test_rna_complement_of_thymine_is_adenine);
+    RUN_TEST(test_rna_complement_of_adenine_is_uracil);
+    RUN_TEST(test_rna_complement);
+    return UNITY_END();
+}