1 files changed, 94 insertions, 0 deletions
diff --git a/Source/Internal/file_descriptor.cpp b/Source/Internal/file_descriptor.cpp
new file mode 100644
index 00000000..48756b27
--- /dev/null
+++ b/Source/Internal/file_descriptor.cpp
@@ -0,0 +1,94 @@
+//-----------------------------------------------------------------------------
+//           Name: file_descriptor.cpp
+//      Developer: Wolfire Games LLC
+//    Description: 
+//        License: Read below
+//-----------------------------------------------------------------------------
+//
+//   Copyright 2022 Wolfire Games LLC
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+//-----------------------------------------------------------------------------
+#include "file_descriptor.h"
+
+#include <Compat/fileio.h>
+#include <Logging/logdata.h>
+
+#include <cstring>
+
+bool DiskFileDescriptor::ReadBytes( void* dst, int num_bytes ) {
+    int elements_read = fread(dst, num_bytes, 1, file_);
+    if(ferror(file_)){
+        perror("File error:");
+    }
+    if(feof(file_)){
+        LOGE << "End of file" << std::endl;
+    }
+    return (elements_read == 1);
+}
+
+bool DiskFileDescriptor::WriteBytes( const void* src, int num_bytes ) {
+    return (fwrite(src, num_bytes, 1, file_) == 1);
+}
+
+bool DiskFileDescriptor::Open( const std::string& abs_path, const std::string& mode ) {
+    file_ = my_fopen(abs_path.c_str(), mode.c_str());
+    return (file_ != NULL);
+}
+
+bool DiskFileDescriptor::Close() {
+    int ret = fclose(file_);
+    file_ = 0;
+    return ret == 0;
+}
+
+int DiskFileDescriptor::GetSize() {
+    int index = ftell(file_);
+    fseek (file_, 0, SEEK_END);
+    int file_size = ftell(file_);
+    fseek (file_ , index , SEEK_SET );
+    return file_size;
+}
+
+DiskFileDescriptor::~DiskFileDescriptor() {
+    if(file_){
+        fclose(file_);
+    }
+}
+
+int DiskFileDescriptor::ReadBytesPartial(void* dst, int num_bytes) {
+    return fread(dst, 1, num_bytes, file_);
+}
+
+bool MemReadFileDescriptor::ReadBytes( void* dst, int num_bytes ) {
+    if(!ptr_){
+        return false;
+    }
+    if(num_bytes == 0){
+        return true;
+    }
+    memcpy(dst, (char*)ptr_ + index_, num_bytes);
+    index_ += num_bytes;
+    return true; // memcpy performs no error checking
+}
+
+bool MemWriteFileDescriptor::WriteBytes( const void* src, int num_bytes ) {
+    if(num_bytes == 0){
+        return true;
+    }
+    vec_.resize(vec_.size() + num_bytes);
+    uint8_t *dst = &vec_[vec_.size()-num_bytes];
+    memcpy(dst, src, num_bytes);
+    return true; // memcpy performs no error checking
+}