diff options
Diffstat (limited to 'source/OSSupport')
| -rw-r--r-- | source/OSSupport/File.cpp | 4 | ||||
| -rw-r--r-- | source/OSSupport/File.h | 14 | ||||
| -rw-r--r-- | source/OSSupport/GZipFile.cpp | 79 | ||||
| -rw-r--r-- | source/OSSupport/GZipFile.h | 49 |
4 files changed, 133 insertions, 13 deletions
diff --git a/source/OSSupport/File.cpp b/source/OSSupport/File.cpp index 7fbaf218f..15a37a36f 100644 --- a/source/OSSupport/File.cpp +++ b/source/OSSupport/File.cpp @@ -28,7 +28,7 @@ cFile::cFile(void) : /// Constructs and opens / creates the file specified, use IsOpen() to check for success -cFile::cFile(const AString & iFileName, EMode iMode) : +cFile::cFile(const AString & iFileName, eMode iMode) : #ifdef USE_STDIO_FILE m_File(NULL) #else @@ -55,7 +55,7 @@ cFile::~cFile() -bool cFile::Open(const AString & iFileName, EMode iMode) +bool cFile::Open(const AString & iFileName, eMode iMode) { ASSERT(!IsOpen()); // You should close the file before opening another one diff --git a/source/OSSupport/File.h b/source/OSSupport/File.h index 5e7cd4431..fe5d38bd0 100644 --- a/source/OSSupport/File.h +++ b/source/OSSupport/File.h @@ -25,8 +25,6 @@ Usage: #pragma once -#ifndef CFILE_H_INCLUDED -#define CFILE_H_INCLUDED @@ -53,7 +51,7 @@ public: #endif /// The mode in which to open the file - enum EMode + enum eMode { fmRead, // Read-only. If the file doesn't exist, object will not be valid fmWrite, // Write-only. If the file already exists, it will be overwritten @@ -64,12 +62,12 @@ public: cFile(void); /// Constructs and opens / creates the file specified, use IsOpen() to check for success - cFile(const AString & iFileName, EMode iMode); + cFile(const AString & iFileName, eMode iMode); /// Auto-closes the file, if open ~cFile(); - bool Open(const AString & iFileName, EMode iMode); + bool Open(const AString & iFileName, eMode iMode); void Close(void); bool IsOpen(void) const; bool IsEOF(void) const; @@ -108,9 +106,3 @@ private: - -#endif // CFILE_H_INCLUDED - - - - diff --git a/source/OSSupport/GZipFile.cpp b/source/OSSupport/GZipFile.cpp new file mode 100644 index 000000000..8f5edd3d7 --- /dev/null +++ b/source/OSSupport/GZipFile.cpp @@ -0,0 +1,79 @@ +
+// GZipFile.cpp
+
+// Implements the cGZipFile class representing a RAII wrapper over zlib's GZip file routines
+
+#include "Globals.h"
+#include "GZipFile.h"
+
+
+
+
+
+cGZipFile::cGZipFile(void) :
+ m_File(NULL)
+{
+}
+
+
+
+
+
+cGZipFile::~cGZipFile()
+{
+ Close();
+}
+
+
+
+
+
+bool cGZipFile::Open(const AString & a_FileName, eMode a_Mode)
+{
+ if (m_File != NULL)
+ {
+ ASSERT(!"A file is already open in this object");
+ return false;
+ }
+ m_File = gzopen(a_FileName.c_str(), (a_Mode == fmRead) ? "r" : "w");
+ return (m_File != NULL);
+}
+
+
+
+
+
+void cGZipFile::Close(void)
+{
+ if (m_File != NULL)
+ {
+ gzclose(m_File);
+ m_File = NULL;
+ }
+}
+
+
+
+
+
+int cGZipFile::ReadRestOfFile(AString & a_Contents)
+{
+ if (m_File == NULL)
+ {
+ ASSERT(!"No file has been opened");
+ return -1;
+ }
+
+ // Since the gzip format doesn't really support getting the uncompressed length, we need to read incrementally. Yuck!
+ int NumBytesRead = 0;
+ char Buffer[64 KiB];
+ while ((NumBytesRead = gzread(m_File, Buffer, sizeof(Buffer))) > 0)
+ {
+ a_Contents.append(Buffer, NumBytesRead);
+ }
+ return NumBytesRead;
+}
+
+
+
+
diff --git a/source/OSSupport/GZipFile.h b/source/OSSupport/GZipFile.h new file mode 100644 index 000000000..bb8a88ec8 --- /dev/null +++ b/source/OSSupport/GZipFile.h @@ -0,0 +1,49 @@ +
+// GZipFile.h
+
+// Declares the cGZipFile class representing a RAII wrapper over zlib's GZip file routines
+
+
+
+
+
+#pragma once
+
+#include "zlib.h"
+
+
+
+
+
+class cGZipFile
+{
+public:
+ enum eMode
+ {
+ fmRead, // Read-only. If the file doesn't exist, object will not be valid
+ fmWrite, // Write-only. If the file already exists, it will be overwritten
+ } ;
+
+ cGZipFile(void);
+ ~cGZipFile();
+
+ /// Opens the file. Returns true if successful. Fails if a file has already been opened through this object.
+ bool Open(const AString & a_FileName, eMode a_Mode);
+
+ /// Closes the file, flushing all buffers. This object may be then reused for a different file and / or mode
+ void Close(void);
+
+ /// Reads the rest of the file and decompresses it into a_Contents. Returns the number of decompressed bytes, <0 for error
+ int ReadRestOfFile(AString & a_Contents);
+
+ /// Writes a_Contents into file, compressing it along the way. Returns the number of decompressed bytes, <0 for error. Multiple writes are supported.
+ int Write(AString & a_Contents);
+
+protected:
+ gzFile m_File;
+} ;
+
+
+
+
+
|