From 192792e30a2d7d632422a5bd540d9320d6fc31f2 Mon Sep 17 00:00:00 2001
From: Zack Buhman <zack@buhman.org>
Date: Thu, 6 Feb 2025 08:25:30 -0600
Subject: [PATCH] iso9660/test: add rock ridge parsing

---
 iso9660/test.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/iso9660/test.cpp b/iso9660/test.cpp
index bdbdd99..a537681 100644
--- a/iso9660/test.cpp
+++ b/iso9660/test.cpp
@@ -2,6 +2,7 @@
 #include <string>
 #include <iostream>
 #include <bit>
+#include <cassert>
 
 #include "primary_volume_descriptor.hpp"
 #include "directory_record.hpp"
@@ -49,10 +50,41 @@ int main()
     write_field(dr->file_identifier, dr->length_of_file_identifier);
     std::cout << std::hex << "file_flags: " << (int)dr->file_flags << '\n';
 
+    uint32_t system_use_offset = 33 + dr->length_of_file_identifier + ((dr->length_of_file_identifier & 1) == 0);
+    const char * system_use = &str[offset + system_use_offset];
+    std::cout << "system use:\n";
+
+    for (int i = 0; i < dr->length_of_directory_record - system_use_offset;) {
+      std::cout << "  entry: ";
+      std::cout << system_use[i + 0] << system_use[i + 1] << '\n';
+
+      int length = (uint8_t)system_use[i + 2];
+      std::cout << "  length: ";
+      std::cout << length << '\n';
+
+      if (system_use[i + 0] == 'N' && system_use[i + 1] == 'M') {
+        int version = (uint8_t)system_use[i + 3];
+        assert(version == 1);
+        int flags = (uint8_t)system_use[i + 4];
+        if (flags == 0) {
+          std::cout << "name: ";
+          for (int j = 5; j < length; j++) {
+            std::cout << system_use[i + j];
+          }
+          std::cout << '\n';
+        }
+      }
+
+      if (length == 0) length = 1;
+      i += length;
+    }
+    std::cout << '\n';
+
     if (dr->file_flags == 0) {
       std::cout << "location_of_extent: " << dr->location_of_extent.get() << '\n';
       std::cout << "data_length: " << std::dec << dr->data_length.get() << '\n';
 
+      /*
       if (dr->file_identifier[0] != '1') {
 	const uint32_t extent = dr->location_of_extent.get() * 2048;
 	auto file = reinterpret_cast<const uint8_t *>(&str[extent]);
@@ -60,6 +92,7 @@ int main()
 	write_field(file, dr->data_length.get());
 	std::cout << "---end file content---\n";
       }
+      */
     }
 
     offset += dr->length_of_directory_record;