From 0fa21580fa6d673bcf221d5942ce8fc26bb5448b Mon Sep 17 00:00:00 2001
From: Tucker Evans <tuckerevans24@gmail.com>
Date: Wed, 9 Oct 2019 00:29:14 -0400
Subject: Fix function argument offsets

---
 pc.y   |  4 ++++
 tree.c | 26 ++++++++++++++++++++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/pc.y b/pc.y
index d891260..1de6065 100644
--- a/pc.y
+++ b/pc.y
@@ -247,6 +247,7 @@ sub_prog_head
 			tmp->var_type = $5;
 		}
 
+		update_offsets($3, -1);
 		free_tree($3);
 
 
@@ -275,6 +276,8 @@ sub_prog_head
 		assert(tmp->func_info->argv = malloc(i * sizeof(int)));
 
 		assert(!set_func_types($3, tmp->func_info->argv, i));
+
+		update_offsets($3, -1);
 		free_tree($3);
 
 		$$ = mktree(PROC, mkid(tmp), NULL);
@@ -284,6 +287,7 @@ sub_prog_head
 arguments
 	:'(' param_list ')'
 	{
+		cur_scope->offset -= count_args($2);
 		$$ = $2;
 	}
 	|/*empty*/{
diff --git a/tree.c b/tree.c
index dabbb39..92a45df 100644
--- a/tree.c
+++ b/tree.c
@@ -61,6 +61,28 @@ ptree *l, *r;
 	return p;
 }
 
+int update_offsets(list, i)
+ptree *list;
+int i;
+{
+	if (!list) {
+		return i;
+	}
+
+	if (list->type != LIST) {
+		if (list->type == ID && list->attr.nval) {
+			list->attr.nval->offset = i--;
+			return i;
+		} else {
+			yyerror("updating offsets\n");
+		}
+	}
+
+	i = update_offsets(list->l, i);
+	i = update_offsets(list->r, i);
+	return i;
+}
+
 void update_type_info(list, t)
 ptree *list, *t;
 {
@@ -189,7 +211,7 @@ int spaces;
 		if (t->attr.nval->func_info)
 			fprintf(stderr, "\t %d",
 					t->attr.nval->func_info->argc);
-		fprintf(stderr, "]");
+		fprintf(stderr, "] O: %d", t->attr.nval->offset);
 		break;
 	case INUM:
 		fprintf(stderr, "[INUM: %d]", t->attr.ival);
@@ -238,7 +260,7 @@ int spaces;
 		fprintf(stderr, "[?: %d]", t->type);
 		yyerror("Error in tree_print");
 	}
-	fprintf(stderr," %d: L %d\n", t->ret_type, t->label);
+	fprintf(stderr,", T: %d, L: %d\n", t->ret_type, t->label);
 	aux_tree_print(t->l, spaces + 2);
 	aux_tree_print(t->r, spaces + 2);
 }
-- 
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