Add house exercise

config.json

@@ -314,6 +314,14 @@
         "prerequisites": [],
         "difficulty": 5
       },
+      {
+        "slug": "house",
+        "name": "House",
+        "uuid": "c9a8b4d1-b034-460f-95ea-56a6e8ce24e0",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 5
+      },
       {
         "slug": "luhn",
         "name": "Luhn",

exercises/practice/house/.docs/instructions.md

@@ -0,0 +1,105 @@
+# Instructions
+
+Recite the nursery rhyme 'This is the House that Jack Built'.
+
+> [The] process of placing a phrase of clause within another phrase of clause is called embedding.
+> It is through the processes of recursion and embedding that we are able to take a finite number of forms (words and phrases) and construct an infinite number of expressions.
+> Furthermore, embedding also allows us to construct an infinitely long structure, in theory anyway.
+
+- [papyr.com][papyr]
+
+The nursery rhyme reads as follows:
+
+```text
+This is the house that Jack built.
+
+This is the malt
+that lay in the house that Jack built.
+
+This is the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the maiden all forlorn
+that milked the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the man all tattered and torn
+that kissed the maiden all forlorn
+that milked the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the priest all shaven and shorn
+that married the man all tattered and torn
+that kissed the maiden all forlorn
+that milked the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the rooster that crowed in the morn
+that woke the priest all shaven and shorn
+that married the man all tattered and torn
+that kissed the maiden all forlorn
+that milked the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the farmer sowing his corn
+that kept the rooster that crowed in the morn
+that woke the priest all shaven and shorn
+that married the man all tattered and torn
+that kissed the maiden all forlorn
+that milked the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+
+This is the horse and the hound and the horn
+that belonged to the farmer sowing his corn
+that kept the rooster that crowed in the morn
+that woke the priest all shaven and shorn
+that married the man all tattered and torn
+that kissed the maiden all forlorn
+that milked the cow with the crumpled horn
+that tossed the dog
+that worried the cat
+that killed the rat
+that ate the malt
+that lay in the house that Jack built.
+```
+
+[papyr]: https://papyr.com/hypertextbooks/grammar/ph_noun.htm

exercises/practice/house/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "keiravillekode"
+  ],
+  "files": {
+    "solution": [
+      "house.s"
+    ],
+    "test": [
+      "house_test.c"
+    ],
+    "example": [
+      ".meta/example.s"
+    ]
+  },
+  "blurb": "Output the nursery rhyme 'This is the House that Jack Built'.",
+  "source": "British nursery rhyme",
+  "source_url": "https://en.wikipedia.org/wiki/This_Is_The_House_That_Jack_Built"
+}

exercises/practice/house/.meta/example.s

@@ -0,0 +1,47 @@
+.data
+lyrics:
+        .string "This is the horse and the hound and the horn that belonged to the farmer sowing his corn that kept the rooster that crowed in the morn that woke the priest all shaven and shorn that married the man all tattered and torn that kissed the maiden all forlorn that milked the cow with the crumpled horn that tossed the dog that worried the cat that killed the rat that ate the malt that lay in the house that Jack built.\n"
+
+table:
+        .hword -1, 388, 367, 350, 330, 309, 266, 231, 189, 144, 98, 61, 7
+
+.text
+.globl recite
+
+/* extern void recite(char *buffer, int start_verse, int end_verse); */
+recite:
+        lsl     x1, x1, #1              /* offset into start_verse for table */
+        lsl     x2, x2, #1              /* offset into end_verse for table */
+
+        adrp    x5, table
+        add     x5, x5, :lo12:table
+
+        adrp    x3, lyrics
+        add     x3, x3, :lo12:lyrics
+
+        add     x1, x1, x5              /* address of offset of start verse */
+        add     x2, x2, x5              /* address of offset of end verse */
+        add     x4, x3, 7               /* end of "This is" */
+        mov     x6, x3                  /* "This is" */
+
+.line:
+        ldrb    w7, [x6], #1
+        strb    w7, [x0], #1
+        cmp     x6, x4
+        bne     .line
+
+        ldrh    w8, [x1]                /* offset of current verse */
+        add     x6, x3, x8              /* " the ..." for current verse */
+
+.copy:
+        ldrb    w7, [x6], #1
+        strb    w7, [x0], #1
+        cbnz    w7, .copy
+
+        sub     x0, x0, #1              /* output address for next verse */
+        mov     x6, x3                  /* "This is" */
+        cmp     x1, x2
+        add     x1, x1, #2              /* address of offset of next verse */
+        bne     .line
+
+        ret

exercises/practice/house/.meta/tests.toml

@@ -0,0 +1,52 @@
+# 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.
+
+[28a540ff-f765-4348-9d57-ae33f25f41f2]
+description = "verse one - the house that jack built"
+
+[ebc825ac-6e2b-4a5e-9afd-95732191c8da]
+description = "verse two - the malt that lay"
+
+[1ed8bb0f-edb8-4bd1-b6d4-b64754fe4a60]
+description = "verse three - the rat that ate"
+
+[64b0954e-8b7d-4d14-aad0-d3f6ce297a30]
+description = "verse four - the cat that killed"
+
+[1e8d56bc-fe31-424d-9084-61e6111d2c82]
+description = "verse five - the dog that worried"
+
+[6312dc6f-ab0a-40c9-8a55-8d4e582beac4]
+description = "verse six - the cow with the crumpled horn"
+
+[68f76d18-6e19-4692-819c-5ff6a7f92feb]
+description = "verse seven - the maiden all forlorn"
+
+[73872564-2004-4071-b51d-2e4326096747]
+description = "verse eight - the man all tattered and torn"
+
+[0d53d743-66cb-4351-a173-82702f3338c9]
+description = "verse nine - the priest all shaven and shorn"
+
+[452f24dc-8fd7-4a82-be1a-3b4839cfeb41]
+description = "verse 10 - the rooster that crowed in the morn"
+
+[97176f20-2dd3-4646-ac72-cffced91ea26]
+description = "verse 11 - the farmer sowing his corn"
+
+[09824c29-6aad-4dcd-ac98-f61374a6a8b7]
+description = "verse 12 - the horse and the hound and the horn"
+
+[d2b980d3-7851-49e1-97ab-1524515ec200]
+description = "multiple verses"
+
+[0311d1d0-e085-4f23-8ae7-92406fb3e803]
+description = "full rhyme"

exercises/practice/house/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/house/house.s

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