From b5b9637ff2d222841632b8644b94835ec1c93359 Mon Sep 17 00:00:00 2001
From: Astatin <git@astatin.live>
Date: Tue, 7 Jan 2025 16:20:52 +0900
Subject: Add label offset + allow to use labels with .DB macro + relative
 labels

---
 instructions.go | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

(limited to 'instructions.go')

diff --git a/instructions.go b/instructions.go
index 59daa3a..ddcb833 100644
--- a/instructions.go
+++ b/instructions.go
@@ -8,10 +8,11 @@ import (
 type ParamType func(labels *Labels, defs *Definitions, param string) (uint16, error)
 
 type InstructionParams struct {
-	Types          []ParamType
-	Assembler      func(currentAddress uint16, args []uint16) ([]uint8, error)
-	Wildcard       bool
-	MacroForbidden bool
+	Types            []ParamType
+	Assembler        func(currentAddress uint16, args []uint16) ([]uint8, error)
+	Wildcard         bool
+	MacroForbidden   bool
+	LabelsBeforeOnly bool
 }
 
 type InstructionSet map[string][]InstructionParams
@@ -503,6 +504,7 @@ func (set InstructionSet) Parse(
 	labels *Labels,
 	defs *Definitions,
 	isMacro bool,
+	isFirstPass bool,
 	currentAddress uint16,
 	line string,
 ) ([]byte, error) {
@@ -534,7 +536,12 @@ instruction_param_loop:
 				paramType = instrParam.Types[i]
 			}
 
-			parsed, err := paramType(labels, defs, params[i])
+			accessibleLabels := labels
+
+			if isFirstPass && !instrParam.LabelsBeforeOnly {
+				accessibleLabels = nil
+			}
+			parsed, err := paramType(accessibleLabels, defs, params[i])
 			if err != nil {
 				continue instruction_param_loop
 			}
-- 
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