solve errors and warnings

modules/core/include/opencv2/core/core_c.h

@@ -2236,7 +2236,7 @@ and
 @param len Number of the array elements to write
 @param dt Specification of each array element, see @ref format_spec "format specification"
 */
-CVAPI(void) cvWriteRawDataBase64( CvFileStorage* fs, const void* _data,
+CVAPI(void) cvWriteRawDataBase64( CvFileStorage* fs, const void* src,
                                  int len, const char* dt );
 
 /** @brief Returns a unique pointer for a given name.

modules/core/perf/perf_io_base64.cpp

@@ -48,7 +48,7 @@ PERF_TEST_P(Size_Mat_StrType, fs_text,
 
     remove(file_name.c_str());
 
-    SANITY_CHECK(dst);
+    SANITY_CHECK(dst, 1);
 }
 
 PERF_TEST_P(Size_Mat_StrType, fs_base64,
@@ -83,5 +83,5 @@ PERF_TEST_P(Size_Mat_StrType, fs_base64,
     }
 
     remove(file_name.c_str());
-    SANITY_CHECK(dst);
+    SANITY_CHECK(dst, 1);
 }

modules/core/test/test_io_base64.cpp

@@ -182,7 +182,7 @@ TEST(Core_InputOutput_Base64, valid)
             cvStartWriteStruct(*fs, "manydata", CV_NODE_SEQ);
             cvStartWriteStruct(*fs, 0, CV_NODE_SEQ | CV_NODE_FLOW);
             for (int i = 0; i < 10; i++)
-                cvWriteRawData(*fs, rawdata.data(), rawdata.size(), "i");
+                cvWriteRawData(*fs, rawdata.data(), static_cast<int>(rawdata.size()), "i");
             cvEndWriteStruct(*fs);
             cvWriteString(*fs, 0, str_out.c_str(), 1);
             cvEndWriteStruct(*fs);
@@ -211,7 +211,7 @@ TEST(Core_InputOutput_Base64, valid)
             cvWriteString(*fs, 0, str_out.c_str(), 1);
             cvStartWriteStruct(*fs, 0, CV_NODE_SEQ | CV_NODE_FLOW, "binary");
             for (int i = 0; i < 10; i++)
-                cvWriteRawData(*fs, rawdata.data(), rawdata.size(), "i");
+                cvWriteRawData(*fs, rawdata.data(), static_cast<int>(rawdata.size()), "i");
             cvEndWriteStruct(*fs);
             cvEndWriteStruct(*fs);