TarStream: Add a variant of read_contents() returning an OwnedStringView

luna/include/luna/TarStream.h

@@ -1,4 +1,5 @@
 #pragma once
+#include <luna/OwnedStringView.h>
 #include <luna/Result.h>
 #include <luna/Types.h>
 
@@ -33,6 +34,8 @@ class TarStream
 
     usize read_contents(const Entry& entry, char* buf, usize offset, usize length);
 
+    Result<OwnedStringView> read_contents_as_string(const Entry& entry, usize offset, usize max);
+
   private:
     struct [[gnu::packed]] TarHeader
     {

luna/src/TarStream.cpp

@@ -1,5 +1,6 @@
 #define _LUNA_SYSTEM_ERROR_EXTENSIONS
 #include <luna/Alignment.h>
+#include <luna/Alloc.h>
 #include <luna/CString.h>
 #include <luna/NumberParsing.h>
 #include <luna/TarStream.h>
@@ -95,3 +96,14 @@ usize TarStream::read_contents(const Entry& entry, char* buf, usize offset, usiz
 
     return length;
 }
+
+Result<OwnedStringView> TarStream::read_contents_as_string(const Entry& entry, usize offset, usize max)
+{
+    char* buf = TRY(make_array<char>(max + 1));
+
+    usize nread = read_contents(entry, buf, offset, max);
+
+    buf[nread] = 0;
+
+    return OwnedStringView{buf};
+}