From 6ad3e61a2b5c0629012d6db2c3bb56e55a3a567b Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Tue, 3 Dec 2024 04:13:40 +0000
Subject: Fix errors due to no loops

---
 assembler.c | 15 +++++++++------
 parser.c    | 33 ++++++++++++++++++---------------
 2 files changed, 27 insertions(+), 21 deletions(-)

diff --git a/assembler.c b/assembler.c
index 36cd2c0..df92f1e 100644
--- a/assembler.c
+++ b/assembler.c
@@ -120,12 +120,15 @@ void asm_translate_nodes(buffer_t **asm_buffer, struct PResult nodes,
                          const char *src_name)
 {
   // First pass: Setup the ASM label array
-  struct Label labels[nodes.labels * 2];
-  u64 label_ptr = 0;
-  for (size_t i = 0; i < nodes.size; ++i)
-    if (nodes.nodes[i].type == LIN || nodes.nodes[i].type == LOUT)
-      labels[label_ptr++] =
-          (struct Label){.cur = i, .next = nodes.nodes[i].loop_ref};
+  struct Label labels[nodes.labels ? nodes.labels * 2 : 1];
+  if (nodes.labels)
+  {
+    u64 label_ptr = 0;
+    for (size_t i = 0; i < nodes.size; ++i)
+      if (nodes.nodes[i].type == LIN || nodes.nodes[i].type == LOUT)
+        labels[label_ptr++] =
+            (struct Label){.cur = i, .next = nodes.nodes[i].loop_ref};
+  }
 
   // Second pass: Translating to assembly
   for (size_t i = 0; i < nodes.size; ++i)
diff --git a/parser.c b/parser.c
index 101f3e3..c7765ad 100644
--- a/parser.c
+++ b/parser.c
@@ -121,26 +121,29 @@ struct PResult parse_buffer(buffer_t *buffer)
   }
 
   // Third pass: setup loop references
-  node_t *stack[loops];
-  memset(stack, 0, loops);
   size_t stackptr = 0;
-  for (size_t i = 0; i < usable; ++i)
+  if (loops)
   {
-    node_t *node = nodes + i;
-    if (node->type == LIN)
-      stack[stackptr++] = node;
-    else if (node->type == LOUT)
+    node_t *stack[loops];
+    memset(stack, 0, loops);
+    for (size_t i = 0; i < usable; ++i)
     {
-      if (stackptr == 0)
+      node_t *node = nodes + i;
+      if (node->type == LIN)
+        stack[stackptr++] = node;
+      else if (node->type == LOUT)
       {
-        print_error(buffer->name, node->row, node->col,
-                    "ERROR: Unbalanced square brackets!");
-        goto error;
+        if (stackptr == 0)
+        {
+          print_error(buffer->name, node->row, node->col,
+                      "ERROR: Unbalanced square brackets!");
+          goto error;
+        }
+        // Access last IN loop
+        --stackptr;
+        node->loop_ref            = stack[stackptr] - nodes;
+        stack[stackptr]->loop_ref = i;
       }
-      // Access last IN loop
-      --stackptr;
-      node->loop_ref            = stack[stackptr] - nodes;
-      stack[stackptr]->loop_ref = i;
     }
   }
 
-- 
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