Explicitly test for empty strings in awk scripts.

[dxcommon.git] / scripts / gen-tree.awk

diff --git a/scripts/gen-tree.awk b/scripts/gen-tree.awk
index 413f156707c96b1f3578aca519ba40b105eb9335..1334bf8dfe9611ad83bdfce79fcb99020af25f32 100755 (executable)
--- a/scripts/gen-tree.awk
+++ b/scripts/gen-tree.awk
@@ -165,12 +165,12 @@ indent > 0 {
   level_count[depth]++;
 }
 
-indent == 0 && tree_identifier {
+indent == 0 && tree_identifier != "" {
   trees[tree_identifier] = format_items();
   tree_identifier = "";
 }
 END {
-  if (tree_identifier)
+  if (tree_identifier != "")
     trees[tree_identifier] = format_items()
 }
 indent == 0 { tree_identifier = $1 }
@@ -225,7 +225,7 @@ function format_items(s, i)
     depth--;
   }
 
-  for (i = 2; tree_items[i]; i++) {
+  for (i = 2; tree_items[i] != ""; i++) {
     level_count[i] += level_count[i-1];
   }
 
@@ -234,7 +234,7 @@ function format_items(s, i)
     delete subtree_depth[i];
   }
 
-  for (i = 1; tree_items[i]; i++) {
+  for (i = 1; tree_items[i] != ""; i++) {
     s = s tree_items[i];
     delete tree_items[i];
     delete level_count[i];