Further progress

Mainly focusing on getting things more consistent
2025-07-12 02:13:41 -05:00
parent 61c86c9fea
commit 69d90242ba
9 changed files with 206 additions and 27 deletions
@@ -0,0 +1,55 @@
+const std = @import("std");
+
+const PRead = @import("p_read.zig").Pread;
+const FragEntry = @import("../fragment.zig").FragEntry;
+const BlockSize = @import("../inode/file.zig").BlockSize;
+const Compression = @import("../superblock.zig").Compression;
+
+pub fn DataReader(comptime T: type) type {
+    return struct {
+        const Self = @This();
+
+        alloc: std.mem.Allocator,
+
+        rdr: PRead(T),
+        comp: Compression,
+        offsets: []BlockSize,
+
+        file_size: u64,
+        block_size: u32,
+        sizes: []BlockSize,
+
+        frag: []u8 = undefined,
+
+        pub fn init(
+            alloc: std.mem.Allocator,
+            rdr: PRead(T),
+            comp: Compression,
+            init_offset: u64,
+            file_size: u64,
+            sizes: []BlockSize,
+            block_size: u32,
+        ) !Self {
+            var cur_offset = init_offset;
+            const offsets = alloc.alloc(u64, sizes.len);
+            for (0..sizes.len) |i| {
+                offsets[i] = cur_offset;
+                cur_offset += sizes[i].size;
+            }
+            return .{
+                .alloc = alloc,
+                .rdr = rdr,
+                .comp = comp,
+                .offsets = offsets,
+                .file_size = file_size,
+                .block_size = block_size,
+                .sizes = sizes,
+            };
+        }
+
+        pub fn addFragment(self: *Self, entry: FragEntry, offset: u32) void {
+            self.frag = self.alloc.alloc(u8, self.file_size % self.block_size);
+            //TODO:
+        }
+    };
+}