1 files changed, 375 insertions, 0 deletions

diff --git a/src/OSSupport/File.cpp b/src/OSSupport/File.cpp
new file mode 100644
index 000000000..d2eea498a
--- /dev/null
+++ b/src/OSSupport/File.cpp
@@ -0,0 +1,375 @@
+
+// cFile.cpp
+
+// Implements the cFile class providing an OS-independent abstraction of a file.
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "File.h"
+#include <fstream>
+
+
+
+
+
+cFile::cFile(void) :
+	#ifdef USE_STDIO_FILE
+	m_File(NULL)
+	#else
+	m_File(INVALID_HANDLE_VALUE)
+	#endif  // USE_STDIO_FILE
+{
+	// Nothing needed yet
+}
+
+
+
+
+
+cFile::cFile(const AString & iFileName, eMode iMode) :
+	#ifdef USE_STDIO_FILE
+	m_File(NULL)
+	#else
+	m_File(INVALID_HANDLE_VALUE)
+	#endif  // USE_STDIO_FILE
+{
+	Open(iFileName, iMode);
+}
+
+
+
+
+
+cFile::~cFile()
+{
+	if (IsOpen())
+	{
+		Close();
+	}
+}
+
+
+
+
+
+bool cFile::Open(const AString & iFileName, eMode iMode)
+{
+	ASSERT(!IsOpen());  // You should close the file before opening another one
+	
+	if (IsOpen())
+	{
+		Close();
+	}
+	
+	const char * Mode = NULL;
+	switch (iMode)
+	{
+		case fmRead:      Mode = "rb";  break;
+		case fmWrite:     Mode = "wb";  break;
+		case fmReadWrite: Mode = "rb+"; break;
+		default:
+		{
+			ASSERT(!"Unhandled file mode");
+			return false;
+		}
+	}
+	m_File = fopen( (FILE_IO_PREFIX + iFileName).c_str(), Mode);
+	if ((m_File == NULL) && (iMode == fmReadWrite))
+	{
+		// Fix for MS not following C spec, opening "a" mode files for writing at the end only
+		// The file open operation has been tried with "read update", fails if file not found
+		// So now we know either the file doesn't exist or we don't have rights, no need to worry about file contents.
+		// Simply re-open for read-writing, erasing existing contents:
+		m_File = fopen( (FILE_IO_PREFIX + iFileName).c_str(), "wb+");
+	}
+	return (m_File != NULL);
+}
+
+
+
+
+
+void cFile::Close(void)
+{
+	if (!IsOpen())
+	{
+		// Closing an unopened file is a legal nop
+		return;
+	}
+
+	fclose(m_File);
+	m_File = NULL;
+}
+
+
+
+
+
+bool cFile::IsOpen(void) const
+{
+	return (m_File != NULL);
+}
+
+
+
+
+
+bool cFile::IsEOF(void) const
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		// Unopened files behave as at EOF
+		return true;
+	}
+	
+	return (feof(m_File) != 0);
+}
+
+
+
+
+
+int cFile::Read (void * iBuffer, int iNumBytes)
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		return -1;
+	}
+	
+	return fread(iBuffer, 1, iNumBytes, m_File);  // fread() returns the portion of Count parameter actually read, so we need to send iNumBytes as Count
+}
+
+
+
+
+
+int cFile::Write(const void * iBuffer, int iNumBytes)
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		return -1;
+	}
+
+	int res = fwrite(iBuffer, 1, iNumBytes, m_File);  // fwrite() returns the portion of Count parameter actually written, so we need to send iNumBytes as Count
+	return res;
+}
+
+
+
+
+
+int cFile::Seek (int iPosition)
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		return -1;
+	}
+	
+	if (fseek(m_File, iPosition, SEEK_SET) != 0)
+	{
+		return -1;
+	}
+	return ftell(m_File);
+}
+
+
+
+
+
+
+int cFile::Tell (void) const
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		return -1;
+	}
+	
+	return ftell(m_File);
+}
+
+
+
+
+
+int cFile::GetSize(void) const
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		return -1;
+	}
+	
+	int CurPos = ftell(m_File);
+	if (CurPos < 0)
+	{
+		return -1;
+	}
+	if (fseek(m_File, 0, SEEK_END) != 0)
+	{
+		return -1;
+	}
+	int res = ftell(m_File);
+	if (fseek(m_File, CurPos, SEEK_SET) != 0)
+	{
+		return -1;
+	}
+	return res;
+}
+
+
+
+
+
+int cFile::ReadRestOfFile(AString & a_Contents)
+{
+	ASSERT(IsOpen());
+	
+	if (!IsOpen())
+	{
+		return -1;
+	}
+	
+	int DataSize = GetSize() - Tell();
+	
+	// HACK: This depends on the internal knowledge that AString's data() function returns the internal buffer directly
+	a_Contents.assign(DataSize, '\0');
+	return Read((void *)a_Contents.data(), DataSize);
+}
+
+
+
+
+
+bool cFile::Exists(const AString & a_FileName)
+{
+	cFile test(a_FileName, fmRead);
+	return test.IsOpen();
+}
+
+
+
+
+
+bool cFile::Delete(const AString & a_FileName)
+{
+	return (remove(a_FileName.c_str()) == 0);
+}
+
+
+
+
+
+bool cFile::Rename(const AString & a_OrigFileName, const AString & a_NewFileName)
+{
+	return (rename(a_OrigFileName.c_str(), a_NewFileName.c_str()) == 0);
+}
+
+
+
+
+
+bool cFile::Copy(const AString & a_SrcFileName, const AString & a_DstFileName)
+{
+	#ifdef _WIN32
+		return (CopyFile(a_SrcFileName.c_str(), a_DstFileName.c_str(), true) != 0);
+	#else
+		// Other OSs don't have a direct CopyFile equivalent, do it the harder way:
+		std::ifstream src(a_SrcFileName.c_str(), std::ios::binary);
+		std::ofstream dst(a_DstFileName.c_str(), std::ios::binary);
+		if (dst.good())
+		{
+			dst << src.rdbuf();
+			return true;
+		}
+		else
+		{
+			return false;
+		}
+	#endif
+}
+
+
+
+
+
+bool cFile::IsFolder(const AString & a_Path)
+{
+	#ifdef _WIN32
+		DWORD FileAttrib = GetFileAttributes(a_Path.c_str());
+		return ((FileAttrib != INVALID_FILE_ATTRIBUTES) && ((FileAttrib & FILE_ATTRIBUTE_DIRECTORY) != 0));
+	#else
+		struct stat st;
+		return ((stat(a_Path.c_str(), &st) == 0) && S_ISDIR(st.st_mode));
+	#endif
+}
+
+
+
+
+
+bool cFile::IsFile(const AString & a_Path)
+{
+	#ifdef _WIN32
+		DWORD FileAttrib = GetFileAttributes(a_Path.c_str());
+		return ((FileAttrib != INVALID_FILE_ATTRIBUTES) && ((FileAttrib & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE)) == 0));
+	#else
+		struct stat st;
+		return ((stat(a_Path.c_str(), &st) == 0) && S_ISREG(st.st_mode));
+	#endif
+}
+
+
+
+
+
+int cFile::GetSize(const AString & a_FileName)
+{
+	struct stat st;
+	if (stat(a_FileName.c_str(), &st) == 0)
+	{
+		return st.st_size;
+	}
+	return -1;
+}
+
+
+
+
+
+bool cFile::CreateFolder(const AString & a_FolderPath)
+{
+	#ifdef _WIN32
+		return (CreateDirectory(a_FolderPath.c_str(), NULL) != 0);
+	#else
+		return (mkdir(a_FolderPath.c_str(), S_IRWXU | S_IRWXG | S_IRWXO) == 0);
+	#endif
+}
+
+
+
+
+
+int cFile::Printf(const char * a_Fmt, ...)
+{
+	AString buf;
+	va_list args;
+	va_start(args, a_Fmt);
+	AppendVPrintf(buf, a_Fmt, args);
+	va_end(args);
+	return Write(buf.c_str(), buf.length());
+}
+
+
+
+