From 213dfa8b92414e45fc4e7089ff6af131c7b822ba Mon Sep 17 00:00:00 2001
From: Caleb Gardner <calebq23@gmail.com>
Date: Wed, 21 May 2025 20:49:13 -0500
Subject: [PATCH] Started on zig-unquashfs

---
 build.zig    | 11 ++++++++++
 src/file.zig | 57 +++++++++++++++++++++++++---------------------------
 src/main.zig | 20 ++++++++++++++++++
 3 files changed, 58 insertions(+), 30 deletions(-)
 create mode 100644 src/main.zig

diff --git a/build.zig b/build.zig
index e720f30..387aa7b 100644
--- a/build.zig
+++ b/build.zig
@@ -14,6 +14,17 @@ pub fn build(b: *std.Build) void {
         .root_module = lib_mod,
     });
     b.installArtifact(lib);
+    const exe_mod = b.createModule(.{
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+    const exe = b.addExecutable(.{
+        .linkage = .static,
+        .name = "unsquashfs",
+        .root_module = exe_mod,
+    });
+    b.installArtifact(exe);
     const lib_unit_tests = b.addTest(.{
         .root_module = lib_mod,
     });
diff --git a/src/file.zig b/src/file.zig
index 60e9d8e..e0ca092 100644
--- a/src/file.zig
+++ b/src/file.zig
@@ -23,6 +23,25 @@ pub const File = struct {
         NotFound,
     };
 
+    fn fromDirEntry(read: *Reader, ent: DirEntry) !File {
+        var offset_rdr = read.holder.readerAt(ent.block_start + read.super.inode_table_start);
+        var meta_rdr: MetadataReader = try .init(
+            read.alloc,
+            offset_rdr.any(),
+            read.super.decomp,
+        );
+        defer meta_rdr.deinit();
+        try meta_rdr.skip(ent.offset);
+        return .{
+            .name = ent.name,
+            .inode = try .init(
+                read.alloc,
+                meta_rdr.any(),
+                read.super.block_size,
+            ),
+        };
+    }
+
     pub fn deinit(self: *File, alloc: std.mem.Allocator) void {
         self.inode.deinit();
         alloc.free(self.name);
@@ -56,7 +75,7 @@ pub const File = struct {
         if (ent == null) {
             return FileError.NotFound;
         }
-        var fil = try fileFromDirEntry(reader, ent.?);
+        var fil = try fromDirEntry(reader, ent.?);
         return fil.realOpen(reader, clean_path[split_idx..], false);
     }
 
@@ -68,6 +87,13 @@ pub const File = struct {
         };
     }
 
+    pub fn iterator(self: *File, read: *Reader) !FileIterator {
+        switch (self.inode.header.inode_type){
+            .dir, ext_dir => {}
+            else => return FileError.NotDirectory,
+        }
+    }
+
     fn readDirEntries(self: *File, reader: *Reader) !void {
         if (self.dirEntries != null) return;
         var block_start: u32 = 0;
@@ -104,32 +130,3 @@ pub const File = struct {
         return self.data_rdr.?.read(bytes);
     }
 };
-
-fn fileFromDirEntry(read: *Reader, ent: DirEntry) !File {
-    var offset_rdr = read.holder.readerAt(ent.block_start + read.super.inode_table_start);
-    var meta_rdr: MetadataReader = .init(
-        read.alloc,
-        read.super.decomp,
-        offset_rdr.any(),
-    );
-    defer meta_rdr.deinit();
-    try meta_rdr.skip(ent.offset);
-    // Copy name so we can clean-up the DirEntrys without causing issues.
-    const name = try read.alloc.alloc(u8, ent.name.len);
-    errdefer read.alloc.free(name);
-    @memcpy(name, ent.name);
-    var out: File = .{
-        .name = name,
-        .inode = try .init(
-            read.alloc,
-            meta_rdr.any(),
-            read.super.block_size,
-        ),
-    };
-    errdefer out.deinit(read.alloc);
-    out.data_rdr = switch (out.inode.data) {
-        .file, .ext_file => try .init(&out, read),
-        else => null,
-    };
-    return out;
-}
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..fb3b601
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,20 @@
+const std = @import("std");
+
+const Reader = @import("reader.zig");
+
+const stdout = std.io.getStdOut();
+
+pub fn main() !void {
+    const alloc: std.heap.GeneralPurposeAllocator(.{}) = .init();
+    const args = try std.process.argsWithAllocator(alloc.allocator());
+    defer args.deinit();
+    while (args.next()) |arg| {
+        if (std.mem.eql(u8, arg, "--help")) {
+            help();
+            return;
+        }
+    }
+    //TODO
+}
+
+fn help() void {}