SabreTools/SabreTools.Serialization
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Port OpenNext/OpenPrevious from BOS

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This commit is contained in:
Matt Nadareski
2025-07-28 15:13:19 -04:00
parent 5e0b0070ff
commit ecf6c957c9
1 changed files with 59 additions and 27 deletions
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86
SabreTools.Serialization/Wrappers/MicrosoftCabinet.cs
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@@ -124,7 +124,6 @@ namespace SabreTools.Serialization.Wrappers
// Get the full file path and directory
filename = Path.GetFullPath(filename);
string? directory = Path.GetDirectoryName(filename);
// Read in the current file and try to parse
var stream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
@@ -135,21 +134,8 @@ namespace SabreTools.Serialization.Wrappers
// Seek to the first part of the cabinet set
while (current.Header.CabinetPrev != null)
{
// Get the path defined in the current header
string prevPath = current.Header.CabinetPrev;
if (directory != null)
prevPath = Path.Combine(directory, prevPath);
// If the file doesn't exist
if (!File.Exists(prevPath))
break;
// Close the previous cabinet part to avoid locking issues
stream.Close();
// Open the previous cabinet and try to parse
stream = File.Open(prevPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
var prev = Create(stream);
// Attempt to open the previous cabinet
var prev = current.OpenPrevious(filename);
if (prev?.Header == null)
break;
@@ -163,18 +149,8 @@ namespace SabreTools.Serialization.Wrappers
// Read in the cabinet parts sequentially
while (current.Header.CabinetNext != null)
{
// Get the path defined in the current header
string nextPath = current.Header.CabinetNext;
if (directory != null)
nextPath = Path.Combine(directory, nextPath);
// If the file doesn't exist
if (!File.Exists(nextPath))
break;
// Open the next cabinet and try to parse
stream = File.Open(nextPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
var next = Create(stream);
var next = current.OpenNext(filename);
if (next?.Header == null)
break;
@@ -188,6 +164,62 @@ namespace SabreTools.Serialization.Wrappers
return start;
}
/// <summary>
/// Open the next archive, if possible
/// </summary>
/// <param name="filename">Filename for one cabinet in the set</param>
public MicrosoftCabinet? OpenNext(string file)
{
// Ignore invalid archives
if (Header == null)
return null;
// Normalize the filename
file = Path.GetFullPath(file);
// Get if the cabinet has a next part
string? next = Header.CabinetNext;
if (string.IsNullOrEmpty(next))
return null;
// Get the full next path
string? folder = Path.GetDirectoryName(file);
if (folder != null)
next = Path.Combine(folder, next);
// Open and return the next cabinet
var fs = File.Open(next, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
return Create(fs);
}
/// <summary>
/// Open the previous archive, if possible
/// </summary>
/// <param name="filename">Filename for one cabinet in the set</param>
public MicrosoftCabinet? OpenPrevious(string file)
{
// Ignore invalid archives
if (Header == null)
return null;
// Normalize the filename
file = Path.GetFullPath(file);
// Get if the cabinet has a previous part
string? prev = Header.CabinetPrev;
if (string.IsNullOrEmpty(prev))
return null;
// Get the full next path
string? folder = Path.GetDirectoryName(file);
if (folder != null)
prev = Path.Combine(folder, prev);
// Open and return the previous cabinet
var fs = File.Open(prev, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
return Create(fs);
}
#endregion
#region Checksumming