Refactor: Rename BlobReader to BlobFinder

Renamed BlobReader and BlobWriter to BlobFinder as suggested by @janwas in TODO. Also Updated associated files, tests, and CMakeLists.txt.

CMakeLists.txt

@@ -98,8 +98,8 @@ set(SOURCES
   gemma/vit.h
   gemma/weights.cc
   gemma/weights.h
-  io/blob_store.cc
-  io/blob_store.h
+  io/blob_finder.cc
+  io/blob_finder.h
   io/fields.cc
   io/fields.h
   io/io_win.cc
@@ -223,7 +223,7 @@ set(GEMMA_TEST_FILES
   evals/gemma_test.cc
   gemma/flash_attention_test.cc
   gemma/tensor_info_test.cc
-  io/blob_store_test.cc
+  io/blob_finder_test.cc
   io/fields_test.cc
   ops/bench_matmul.cc
   ops/dot_test.cc

io/blob_finder.cc

@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "io/blob_store.h"
+#include "io/blob_finder.h"
 
 #include <stddef.h>
 #include <stdint.h>

io/blob_finder.h

@@ -13,8 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef THIRD_PARTY_GEMMA_CPP_IO_BLOB_STORE_H_
-#define THIRD_PARTY_GEMMA_CPP_IO_BLOB_STORE_H_
+#ifndef THIRD_PARTY_GEMMA_CPP_IO_BLOB_FINDER_H_
+#define THIRD_PARTY_GEMMA_CPP_IO_BLOB_FINDER_H_
 
 // Reads/writes arrays of bytes from/to file.
 
@@ -48,11 +48,11 @@ struct BlobRange {
 // faster lookups.
 // TODO(janwas): rename to BlobFinder or similar.
 // Thread-safe: it is safe to concurrently call all methods except `CloseFile`.
-class BlobReader {
+class BlobFinder {
  public:
   // Acquires ownership of `file` (which must be non-null) and reads its header.
   // Aborts on error.
-  explicit BlobReader(const Path& blob_path);
+  explicit BlobFinder(const Path& blob_path);
 
   const Path& blob_path() const { return blob_path_; }
 
@@ -136,4 +136,4 @@ class BlobWriter {
 
 }  // namespace gcpp
 
-#endif  // THIRD_PARTY_GEMMA_CPP_IO_BLOB_STORE_H_
+#endif  // THIRD_PARTY_GEMMA_CPP_IO_BLOB_FINDER_H_

io/blob_finder_test.cc

@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "io/blob_store.h"
+#include "io/blob_finder.h"
 
 #include <stdio.h>
 
@@ -32,10 +32,10 @@ namespace gcpp {
 namespace {
 
 #if !HWY_TEST_STANDALONE
-class BlobStoreTest : public testing::Test {};
+class BlobFinderTest : public testing::Test {};
 #endif
 
-TEST(BlobStoreTest, TestReadWrite) {
+TEST(BlobFinderTest, TestReadWrite) {
   ThreadingArgs threading_args;
   ThreadingContext ctx(threading_args);
 
@@ -59,7 +59,7 @@ TEST(BlobStoreTest, TestReadWrite) {
 
   std::fill(buffer.begin(), buffer.end(), 0);
 
-  const BlobReader reader(path);
+  const BlobFinder reader(path);
 
   HWY_ASSERT_EQ(reader.Keys().size(), 2);
   HWY_ASSERT_STRING_EQ(reader.Keys()[0].c_str(), keyA.c_str());
@@ -92,7 +92,7 @@ TEST(BlobStoreTest, TestReadWrite) {
 }
 
 // Ensures padding works for any number of random-sized blobs.
-TEST(BlobStoreTest, TestNumBlobs) {
+TEST(BlobFinderTest, TestNumBlobs) {
   ThreadingArgs threading_args;
   ThreadingContext ctx(threading_args);
   hwy::RandomState rng;
@@ -126,7 +126,7 @@ TEST(BlobStoreTest, TestNumBlobs) {
     HWY_ASSERT(blobs.size() == num_blobs);
     writer.Finalize();
 
-    BlobReader reader(path);
+    BlobFinder reader(path);
     HWY_ASSERT_EQ(reader.Keys().size(), num_blobs);
 
     ParallelFor(