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61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
#include <unistd.h>
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#include "socket.h"
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#ifdef __linux__
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#ifdef __GLIBC__
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#include <sys/sendfile.h>
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#else
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#ifdef __dietlibc__
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#include <sys/sendfile.h>
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#else
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#include <linux/unistd.h>
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_syscall4(int,sendfile,int,out,int,in,long *,offset,unsigned long,count)
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#endif
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#endif
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int socket_sendfile(int out,int in,uint32 offset,uint32 bytes) {
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off_t tmp=offset;
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return sendfile(out,in,&tmp,bytes);
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}
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#else
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#ifdef _HPUX_SOURCE
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/* http://www.devresource.hp.com/STK/man/10.30/sendfile_2.html */
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#include <sys/socket.h>
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int socket_sendfile(int out,int in,uint32 offset,uint32 bytes) {
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return sendfile(out,in,offset,bytes,0,0);
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}
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#else
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#define BUFSIZE 16384
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int socket_sendfile(int out,int in,uint32 offset,uint32 bytes) {
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char buf[BUFSIZE];
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int n,m;
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uint32 sent=0;
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if (lseek(in,offset,SEEK_SET) != offset)
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return -1;
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while (bytes>0) {
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char* tmp=buf;
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if ((n=read(in,tmp,(bytes<BUFSIZE)?bytes:BUFSIZE))<=0)
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return (sent?sent:-1);
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while (n>0) {
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if ((m=write(out,tmp,n))<0)
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goto abort;
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sent+=m;
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n-=m;
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tmp+=m;
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}
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}
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abort:
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return sent;
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}
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#endif
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#endif
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