New sockwrap.c - contains a single function currently: sendfilesocket()

for a cross-platform sendfile() implementation.

src/xpdev/sockwrap.c

+/* sockwrap.c */
+
+/* Berkley/WinSock socket API wrappers */
+
+/* $Id$ */
+
+/****************************************************************************
+ * @format.tab-size 4		(Plain Text/Source Code File Header)			*
+ * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
+ *																			*
+ * Copyright 2002 Rob Swindell - http://www.synchro.net/copyright.html		*
+ *																			*
+ * This library is free software; you can redistribute it and/or			*
+ * modify it under the terms of the GNU Lesser General Public License		*
+ * as published by the Free Software Foundation; either version 2			*
+ * of the License, or (at your option) any later version.					*
+ * See the GNU Lesser General Public License for more details: lgpl.txt or	*
+ * http://www.fsf.org/copyleft/lesser.html									*
+ *																			*
+ * Anonymous FTP access to the most recent released source is available at	*
+ * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
+ *																			*
+ * Anonymous CVS access to the development source and modification history	*
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+ *     (just hit return, no password is necessary)							*
+ * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
+ *																			*
+ * For Synchronet coding style and modification guidelines, see				*
+ * http://www.synchro.net/source.html										*
+ *																			*
+ * You are encouraged to submit any modifications (preferably in Unix diff	*
+ * format) via e-mail to mods@synchro.net									*
+ *																			*
+ * Note: If this box doesn't appear square, then you need to fix your tabs.	*
+ ****************************************************************************/
+
+#include <errno.h>		/* ENOMEM */
+
+#include "sockwrap.h"	/* sendsocket */
+#include "filewrap.h"	/* filelength */
+
+int sendfilesocket(int sock, int file, long *offset, long count)
+{
+	char*	buf;
+	long	len;
+	int		rd;
+	int		wr;
+
+	len=filelength(file);
+	if((buf=malloc(len))==NULL) {
+		errno=ENOMEM;
+		return(-1);
+	}
+
+	if(offset!=NULL)
+		if(lseek(file,*offset,SEEK_SET)<0)
+			return(-1);
+
+	if(count==0)
+		count=len;
+
+	rd=read(file,buf,count);
+	close(file);
+	if(rd!=count) {
+		free(buf);
+		return(-1);
+	}
+
+	wr=sendsocket(sock,buf,len);
+	free(buf);
+
+	if(offset!=NULL)
+		(*offset)+=wr;
+
+	return(wr);
+}
+