Fix segfault, add test script

kovzol · Jan 6, 2025 · 2c19652 · 2c19652
1 parent 4dbb703
commit 2c19652
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Showing 2 changed files with 22 additions and 0 deletions.
diff --git a/statements/pbrst-cli.c b/statements/pbrst-cli.c
@@ -105,6 +105,7 @@ int main(int ac, char **av)
     }
     if (graphviz) {
       char *g_start = strstr(parseinfo, "diagram: graphviz: start\n");
+      if (g_start == NULL) exit(0); // empty output
       g_start = strstr(g_start, "\n");
       g_start++;
       char *g_end = strstr(parseinfo, "diagram: graphviz: end");

diff --git a/statements/tests/runme-graphviz b/statements/tests/runme-graphviz
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# This test assumes that pbrst-cli has already been compiled.
+# It creates an HTML file with embedded SVG images.
+
+HTML=graphviz.html
+echo "<html><body><center>" > $HTML
+
+FILES=`ls -1 *.brst`
+F_NO=`ls -1 *.brst | wc -l`
+n=0
+for i in $FILES; do
+ n=$((n+1))
+ echo -n -e "\r$i ($n/$F_NO)\033[0K"
+ ../pbrst-cli -g $i > $i.dot
+ dot -Tsvg $i.dot > $i.svg
+ echo "<img src=$i.svg><br>" >> $HTML
+ done
+echo
+
+echo "</center></body></html>" >> $HTML