delete in chunks

PKGBUILD

@@ -1,27 +0,0 @@
-pkgname=dull-git
-pkgver=0.1
-pkgrel=1
-pkgdesc="Desktop app for securely storing sensitive files"
-arch=('x86_64')
-url="https://github.com/antpiasecki/dull"
-depends=('qt6-base' 'botan')
-makedepends=('cmake' 'git')
-source=("git+${url}.git")
-sha256sums=('SKIP')
-options=('!debug')
-
-pkgver() {
-  cd "${pkgname%-git}"
-  git describe --long --tags | sed 's/^v//;s/\([^-]*-g\)/r\1/;s/-/./g'
-}
-
-build() {
-  cd "${pkgname%-git}"
-  cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr
-  cmake --build build -j$(nproc)
-}
-
-package() {
-  cd "${pkgname%-git}/build"
-  make DESTDIR="${pkgdir}" install
-}

README.md

@@ -4,7 +4,7 @@ Desktop app for securely storing sensitive files
 
 ## Features
 * **Pretty usable UI**
-* **Overkill encryption:** XChaCha20-Poly1305 + Argon2id(m=1GB,t=6,p=4) key derivation
+* **Overkill encryption:** XChaCha20-Poly1305 + Argon2id(m=1GB,t=8,p=4) key derivation
 * **Cross-platform-ish:** Builds on Linux, Windows and macOS
 * **Drag and Drop support**
 
@@ -21,8 +21,11 @@ cmake --build build -j $(nproc)
 
 ### Arch
 ```
-sudo pacman -S base-devel
-makepkg -si
+sudo pacman -Syu base-devel cmake qt6-base botan
+
+cmake -S . -B build
+cmake --build build -j $(nproc)
+./build/dull
 ```
 
 ### Windows (MSYS2)

src/vault.cc

@@ -143,21 +143,29 @@ void Vault::delete_file(const std::string &filename) {
   if (entry_start != -1) {
     i64 entry_end = entry_start + static_cast<i64>(entry_total_size);
 
+    i64 read_pos = entry_end;
+    i64 write_pos = entry_start;
+    std::array<u8, 65536> buffer{};
+    while (true) {
       m_file.clear();
-    m_file.seekg(entry_end, std::ios::beg);
-    std::string remaining;
-    remaining.assign(std::istreambuf_iterator<char>(m_file),
-                     std::istreambuf_iterator<char>());
+      m_file.seekg(read_pos);
+      m_file.read(to_char_ptr(buffer.data()), buffer.size());
+      auto bytes = m_file.gcount();
+      if (bytes == 0) {
+        break;
+      }
 
-    m_file.clear();
-    m_file.seekp(entry_start, std::ios::beg);
-    ASSERT(m_file.write(remaining.data(), static_cast<i64>(remaining.size())));
+      m_file.seekp(write_pos);
+      ASSERT(m_file.write(to_char_ptr(buffer.data()), bytes));
+
+      read_pos += bytes;
+      write_pos += bytes;
+    }
 
-    i64 new_size = entry_start + static_cast<i64>(remaining.size());
     m_file.flush();
     m_file.close();
 
-    std::filesystem::resize_file(m_path, new_size);
+    std::filesystem::resize_file(m_path, write_pos);
 
     m_file.open(m_path, std::ios::in | std::ios::out | std::ios::binary);
     ASSERT(m_file.good());