From ff9aba206a30288f456dfc91584a52ba9927b438 Mon Sep 17 00:00:00 2001
From: Thomas Loimer <thomas.loimer@tuwien.ac.at>
Date: Tue, 21 Jan 2025 20:50:15 +0100
Subject: [PATCH] Allow an arc-box with zero radius, ticket #184

In the pict2e output, a rectangle with rounded corners,
dashed line type and zero corner-radius would cause a crash.
Convert rectangles with rounded corners and zero corner-radius to
regular rectangles.
---
 fig2dev/read.c        |  8 ++++++++
 fig2dev/tests/read.at | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git fig2dev/read.c fig2dev/read.c
index 387527b..f643f7e 100644
--- fig2dev/read.c
+++ fig2dev/read.c
@@ -1037,6 +1037,14 @@ sanitize_lineobject(F_line *l, int line_no)
 							line_no);
 					return -1;
 				}
+				if (l->type == T_ARC_BOX && l->radius == 0) {
+					put_msg("A %s, but zero corner radius "
+							"at line %d - convert "
+							"to a rectangle.",
+							obj_name[l->type - 2],
+							line_no);
+					l->type = T_BOX;
+				}
 			}
 
 		} else { /* T_BOX || T_POLYGON */
diff --git fig2dev/tests/read.at fig2dev/tests/read.at
index 588424d..1b4baea 100644
--- fig2dev/tests/read.at
+++ fig2dev/tests/read.at
@@ -123,6 +123,17 @@ A rectangle with 3 corners at line 11 - convert to a polygon.
 ])
 AT_CLEANUP
 
+AT_SETUP([convert an arc-box with zero radius to a box])
+AT_KEYWORDS(read.c arc-box)
+AT_CHECK([fig2dev -L pict2e <<EOF
+FIG_FILE_TOP
+2 4 1 1 0 0 50 -1 -1 4.0 0 0 0 0 0 5
+	0 0 300 0 300 300 0 300 0 0
+EOF
+],0,ignore,[A rectangle with rounded corners, but zero corner radius at line 11 - convert to a rectangle.
+])
+AT_CLEANUP
+
 AT_SETUP([fail on a malformed arc-box])
 AT_KEYWORDS(read.c malformed arc-box)
 AT_CHECK([fig2dev -L pict2e <<EOF
-- 
2.35.3