replace snprintf with a C++98 equivalent

3 files changed, 14 insertions, 18 deletions

diff --git a/examples/cifar10/convert_cifar_data.cpp b/examples/cifar10/convert_cifar_data.cpp
index f4c42e4d..e1b89f42 100644
--- a/examples/cifar10/convert_cifar_data.cpp
+++ b/examples/cifar10/convert_cifar_data.cpp
@@ -16,6 +16,7 @@
 
 #include "caffe/proto/caffe.pb.h"
 #include "caffe/util/db.hpp"
+#include "caffe/util/format.hpp"
 
 using caffe::Datum;
 using boost::scoped_ptr;
@@ -52,19 +53,18 @@ void convert_dataset(const string& input_folder, const string& output_folder,
   for (int fileid = 0; fileid < kCIFARTrainBatches; ++fileid) {
     // Open files
     LOG(INFO) << "Training Batch " << fileid + 1;
-    snprintf(str_buffer, kCIFARImageNBytes, "/data_batch_%d.bin", fileid + 1);
-    std::ifstream data_file((input_folder + str_buffer).c_str(),
+    string batchFileName = input_folder + "/data_batch_"
+      + caffe::format_int(fileid+1) + ".bin";
+    std::ifstream data_file(batchFileName.c_str(),
         std::ios::in | std::ios::binary);
     CHECK(data_file) << "Unable to open train file #" << fileid + 1;
     for (int itemid = 0; itemid < kCIFARBatchSize; ++itemid) {
       read_image(&data_file, &label, str_buffer);
       datum.set_label(label);
       datum.set_data(str_buffer, kCIFARImageNBytes);
-      int length = snprintf(str_buffer, kCIFARImageNBytes, "%05d",
-          fileid * kCIFARBatchSize + itemid);
       string out;
       CHECK(datum.SerializeToString(&out));
-      txn->Put(string(str_buffer, length), out);
+      txn->Put(caffe::format_int(fileid * kCIFARBatchSize + itemid, 5), out);
     }
   }
   txn->Commit();
@@ -82,10 +82,9 @@ void convert_dataset(const string& input_folder, const string& output_folder,
     read_image(&data_file, &label, str_buffer);
     datum.set_label(label);
     datum.set_data(str_buffer, kCIFARImageNBytes);
-    int length = snprintf(str_buffer, kCIFARImageNBytes, "%05d", itemid);
     string out;
     CHECK(datum.SerializeToString(&out));
-    txn->Put(string(str_buffer, length), out);
+    txn->Put(caffe::format_int(itemid, 5), out);
   }
   txn->Commit();
   test_db->Close();
diff --git a/examples/mnist/convert_mnist_data.cpp b/examples/mnist/convert_mnist_data.cpp
index 8f29bafd..16d28093 100644
--- a/examples/mnist/convert_mnist_data.cpp
+++ b/examples/mnist/convert_mnist_data.cpp
@@ -23,6 +23,7 @@
 #include <string>
 
 #include "caffe/proto/caffe.pb.h"
+#include "caffe/util/format.hpp"
 
 #if defined(USE_LEVELDB) && defined(USE_LMDB)
 
@@ -108,8 +109,6 @@ void convert_dataset(const char* image_filename, const char* label_filename,
   char label;
   char* pixels = new char[rows * cols];
   int count = 0;
-  const int kMaxKeyLength = 10;
-  char key_cstr[kMaxKeyLength];
   string value;
 
   Datum datum;
@@ -123,18 +122,17 @@ void convert_dataset(const char* image_filename, const char* label_filename,
     label_file.read(&label, 1);
     datum.set_data(pixels, rows*cols);
     datum.set_label(label);
-    snprintf(key_cstr, kMaxKeyLength, "%08d", item_id);
+    string key_str = caffe::format_int(item_id, 8);
     datum.SerializeToString(&value);
-    string keystr(key_cstr);
 
     // Put in db
     if (db_backend == "leveldb") {  // leveldb
-      batch->Put(keystr, value);
+      batch->Put(key_str, value);
     } else if (db_backend == "lmdb") {  // lmdb
       mdb_data.mv_size = value.size();
       mdb_data.mv_data = reinterpret_cast<void*>(&value[0]);
-      mdb_key.mv_size = keystr.size();
-      mdb_key.mv_data = reinterpret_cast<void*>(&keystr[0]);
+      mdb_key.mv_size = key_str.size();
+      mdb_key.mv_data = reinterpret_cast<void*>(&key_str[0]);
       CHECK_EQ(mdb_put(mdb_txn, mdb_dbi, &mdb_key, &mdb_data, 0), MDB_SUCCESS)
           << "mdb_put failed";
     } else {
diff --git a/examples/siamese/convert_mnist_siamese_data.cpp b/examples/siamese/convert_mnist_siamese_data.cpp
index ad08036f..928b3fbf 100644
--- a/examples/siamese/convert_mnist_siamese_data.cpp
+++ b/examples/siamese/convert_mnist_siamese_data.cpp
@@ -13,6 +13,7 @@
 #include "stdint.h"
 
 #include "caffe/proto/caffe.pb.h"
+#include "caffe/util/format.hpp"
 #include "caffe/util/math_functions.hpp"
 
 #ifdef USE_LEVELDB
@@ -75,8 +76,6 @@ void convert_dataset(const char* image_filename, const char* label_filename,
   char label_i;
   char label_j;
   char* pixels = new char[2 * rows * cols];
-  const int kMaxKeyLength = 10;
-  char key[kMaxKeyLength];
   std::string value;
 
   caffe::Datum datum;
@@ -99,8 +98,8 @@ void convert_dataset(const char* image_filename, const char* label_filename,
       datum.set_label(0);
     }
     datum.SerializeToString(&value);
-    snprintf(key, kMaxKeyLength, "%08d", itemid);
-    db->Put(leveldb::WriteOptions(), std::string(key), value);
+    std::string key_str = caffe::format_int(itemid, 8);
+    db->Put(leveldb::WriteOptions(), key_str, value);
   }
 
   delete db;