[frameworks/karchive] src: kzip: write data in chunks

Git commit 2cf5f281c3e1995e2941d605a26a5f2c161020ce by George Florea Bănuș.
Committed on 27/07/2026 at 14:35.
Pushed by georgefb into branch 'master'.

kzip: write data in chunks

z_stream::avail_in is a uint32_t and only supports input sizes up to UINT32_MAX

M  +15   -2    src/kzip.cpp

https://invent.kde.org/frameworks/karchive/-/commit/2cf5f281c3e1995e2941d605a26a5f2c161020ce

diff --git a/src/kzip.cpp b/src/kzip.cpp
index 27e0a2c..d16ee76 100644
--- a/src/kzip.cpp
+++ b/src/kzip.cpp
@@ -1528,9 +1528,22 @@ bool KZip::doWriteData(const char *data, qint64 size)
     // and they didn't mention it in their docs...
     d->m_crc = crc32(d->m_crc, (const Bytef *)data, size);
 
-    qint64 written = d->m_currentDev->write(data, size);
+    constexpr qint64 chunkSize = 2 * 1024 * 1024;
+    qint64 totalWritten = 0;
+    while (totalWritten < size) {
+        qint64 chunk = std::min(chunkSize, size - totalWritten);
+
+        qint64 currentWritten = d->m_currentDev->write(data + totalWritten, chunk);
+        if (currentWritten != chunk) {
+            setErrorString(tr("Error writing data chunk: %1").arg(d->m_currentDev->errorString()));
+            return false;
+        }
+
+        totalWritten += currentWritten;
+    }
+
     // qCDebug(KArchiveLog) << "wrote" << size << "bytes.";
-    const bool ok = written == size;
+    const bool ok = totalWritten == size;
 
     if (!ok) {
         setErrorString(tr("Error writing data: %1").arg(d->m_currentDev->errorString()));