From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Fri, 15 Apr 2022 17:10:46 +0000 (+0200)
Subject: Add sub functions
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=7e7800f0fa64ed9b1c4d5ee42103923ebe195ce5;p=protogen.git

Add sub functions
---

diff --git a/protogen.lua b/protogen.lua
index 130859d..9b98280 100755
--- a/protogen.lua
+++ b/protogen.lua
@@ -132,12 +132,13 @@ local function emit_vector(type, l)
 	existing_types[box] = true
 	has_deallocator[box] = false
 
-	local typedef, equals, add, clamp, cmp, scale, mix, write, read, send, recv =
-	           "",     "",  "",    "",  "",    "",  "",    "",   "",   "",   ""
+	local typedef, equals, add, sub, clamp, cmp, scale, mix, write, read, send, recv =
+	           "",     "",  "",  "",    "",  "",    "",  "",    "",   "",   "",   ""
 
 	typedef = typedef .. "\t" .. type .. " "
 	equals  = equals  .. "\treturn "
 	add     = add     .. "\treturn (" .. name .. ") {"
+	sub     = sub     .. "\treturn (" .. name .. ") {"
 	clamp   = clamp   .. "\treturn (" .. name .. ") {"
 	cmp     = cmp     .. "\tint i;\n"
 	scale   = scale   .. "\treturn (" .. name .. ") {"
@@ -169,6 +170,14 @@ local function emit_vector(type, l)
 				or ", "
 			)
 
+		sub = sub
+			.. "a." .. c .. " - "
+			.. "b." .. c ..
+			(last
+				and "};\n"
+				or ", "
+			)
+
 		clamp = clamp
 			.. type .. "_clamp("
 			.. "val." .. c .. ", "
@@ -219,6 +228,7 @@ local function emit_vector(type, l)
 
 	emit(export_prefix .. "bool " .. name .. "_equals(" .. name .. " a, " .. name .. " b)", "{\n" .. equals .. "}\n\n")
 	emit(export_prefix .. name .. " " .. name .. "_add(" .. name .. " a, " .. name .. " b)", "{\n" .. add .. "}\n\n")
+	emit(export_prefix .. name .. " " .. name .. "_sub(" .. name .. " a, " .. name .. " b)", "{\n" .. add .. "}\n\n")
 	emit(export_prefix .. name .. " " .. name .. "_clamp(" .. name .. " val, " .. name .. " min, " .. name .. " max)", "{\n" .. clamp .. "}\n\n")
 	emit(export_prefix .. "int " .. name .. "_cmp(const void *a, const void *b)", "{\n" .. cmp .. "\treturn 0;\n}\n\n")
 	emit(export_prefix .. name .. " " .. name .. "_scale(" .. name .. " v, " .. type .. " s)", "{\n" .. scale .. "}\n\n")