From 89e8fb58bece299a29260d145a0381928234a6c0 Mon Sep 17 00:00:00 2001
From: Rairii <2650838+Wack0@users.noreply.github.com>
Date: Sun, 4 Aug 2024 10:55:50 +0100
Subject: [PATCH] arcfw(cdfs): when opening file without extension also check
 for filename with dot suffix

NT 3.51 PMZ has setupldr actually named "setupldr.", so this is required there. Fixes #33 .
---
 arcgrackle/source/lib9660.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/arcgrackle/source/lib9660.c b/arcgrackle/source/lib9660.c
index 9481c4e..dd2be10 100644
--- a/arcgrackle/source/lib9660.c
+++ b/arcgrackle/source/lib9660.c
@@ -196,11 +196,14 @@ static l9660_status openat_raw(l9660_file *child, l9660_dir *parent, const char
         const char *seg = name;
         name = strchrnul(name, '\\');
         size_t seglen = (size_t)name - (size_t)seg;
+        bool check_also_for_dot = false;
         if (*name) name++;
+        else if (strchr(seg, '.') == NULL) check_also_for_dot = true;
 
         /* ISO9660 stores '.' as '\0' */
-        if (seglen == 1 && *seg == '.')
+        if (seglen == 1 && *seg == '.') {
             seg = "\0";
+        }
 
         /* ISO9660 stores ".." as '\1' */
         if (seglen == 2 && seg[0] == '.' && seg[1] == '.') {
@@ -221,16 +224,23 @@ static l9660_status openat_raw(l9660_file *child, l9660_dir *parent, const char
 #endif
 
             /* wrong length */
-            if (seglen > dent->name_len)
+            if (seglen > dent->name_len) {
                 continue;
+            }
 
             /* check name */
             if (strnicmp(seg, dent->name, seglen) != 0)
                 continue;
 
             /* check for a revision tag */
-            if (dent->name_len > seglen && dent->name[seglen] != ';')
-                continue;
+            if (dent->name_len > seglen && dent->name[seglen] != ';') {
+                if (!check_also_for_dot) continue;
+                if (dent->name_len > (seglen + 1)) {
+                    if (dent->name[seglen] != '.') continue;
+                    if (dent->name[seglen + 1] != ';') continue;
+                }
+                else continue;
+            }
 
             /* all tests pass */
             break;