From 05293d7392f0e36e6314545f82e3541a48ecd995 Mon Sep 17 00:00:00 2001
From: Forest Belton <forest@homolo.gy>
Date: Tue, 20 Jul 2021 17:53:14 -0400
Subject: [PATCH] Declare items with macros

---
 png/sprite/item/coin.png | Bin 0 -> 228 bytes
 src/item.s               |  29 +++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 png/sprite/item/coin.png
 create mode 100644 src/item.s

diff --git a/png/sprite/item/coin.png b/png/sprite/item/coin.png
new file mode 100644
index 0000000000000000000000000000000000000000..f62f5ed97f53f6dca8ae294786dfdfdcb3f2a8b4
GIT binary patch
literal 228
zcmeAS@N?(olHy`uVBq!ia0vp^93afW1|*O0@9PFqjKx9jP7LeL$-D$|EK(yp(|mmy
zv_PsD7~3-$SU^gESPF<47?>6?!9_S0FeBI?$!$K789*w^)5S4FLbA6%kney3hjZ%9
zy&rUBdNw~eIj7&{&&^3+7l+&ynp$Si@1t69X_m2)g?QEb48?$DyNhq0(NSM$eO2j9
x?usnw<RztV4_sfvyCt*fuG{}A6~_<1&a&$yN}K-sADRrZ&C}J-Wt~$(695#{LPh`p

literal 0
HcmV?d00001

diff --git a/src/item.s b/src/item.s
new file mode 100644
index 0000000..1c788cc
--- /dev/null
+++ b/src/item.s
@@ -0,0 +1,29 @@
+DEF NEXT_ITEM_ID SET 1
+
+; Declare a new item
+; \1 Display name
+; \2 Sprite data filename
+MACRO Item
+    ASSERT STRLEN("\1") < 16
+
+    ; Define item ID symbol
+    DEF ID_NAME EQUS "\1_ID"
+    DEF {ID_NAME} EQU NEXT_ITEM_ID
+    EXPORT {ID_NAME}
+    REDEF NEXT_ITEM_ID SET NEXT_ITEM_ID + 1
+
+    ; Display name
+    DB "\1"
+    REPT 16 - STRLEN("\1")
+        DB 0
+    ENDR
+
+    ; Sprite data
+    INCBIN \2
+ENDM
+
+SECTION "Item Data", ROM0
+
+; NOTE: Macro invocation MUST be indented in order to be expanded correctly
+Items::
+    Item COIN, "png/sprite/item/coin.2bpp"