1

engine/mem_fgets.cpp

@@ -0,0 +1,63 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include <stdio.h>
+#include <memory.h>
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+// Copied from sound.cpp in the DLL
+char *memfgets( unsigned char *pMemFile, int fileSize, int *pFilePos, char *pBuffer, int bufferSize )
+{
+	int filePos = *pFilePos;
+	int i, last, stop;
+
+	// Bullet-proofing
+	if ( !pMemFile || !pBuffer )
+		return NULL;
+
+	if ( filePos >= fileSize )
+		return NULL;
+
+	i = filePos;
+	last = fileSize;
+
+	// fgets always NULL terminates, so only read bufferSize-1 characters
+	if ( last - filePos > (bufferSize-1) )
+		last = filePos + (bufferSize-1);
+
+	stop = 0;
+
+	// Stop at the next newline (inclusive) or end of buffer
+	while ( i < last && !stop )
+	{
+		if ( pMemFile[i] == '\n' )
+			stop = 1;
+		i++;
+	}
+
+
+	// If we actually advanced the pointer, copy it over
+	if ( i != filePos )
+	{
+		// We read in size bytes
+		int size = i - filePos;
+		// copy it out
+		memcpy( pBuffer, pMemFile + filePos, sizeof(unsigned char)*size );
+		
+		// If the buffer isn't full, terminate (this is always true)
+		if ( size < bufferSize )
+			pBuffer[size] = 0;
+
+		// Update file pointer
+		*pFilePos = i;
+		return pBuffer;
+	}
+
+	// No data read, bail
+	return NULL;
+}