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/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASSENDFILE
#include <sys/types.h>
#include <sys/sendfile.h>
#include <limits.h>
#include <skalibs/uint64.h>
#include <skalibs/strerr.h>
#include <skalibs/tai.h>
#include <skalibs/unix-timed.h>
#include "tipideed-internal.h"
void init_splice_pipe (void)
{
}
struct sendfile_s
{
int fd ;
off_t pos ;
uint64_t n ;
} ;
static int s_getfd (void *p)
{
(void)p ;
return 1 ;
}
static int s_isnonempty (void *p)
{
struct sendfile_s *sf = p ;
return !!sf->n ;
}
static int s_flush (void *p)
{
struct sendfile_s *sf = p ;
while (sf->n)
{
ssize_t r = sendfile(1, sf->fd, &sf->pos, sf->n > SSIZE_MAX ? SSIZE_MAX : sf->n) ;
if (r == -1) return 0 ;
sf->n -= r ;
}
return 1 ;
}
void send_file_range (int fd, uint64_t offset, uint64_t n, char const *fn)
{
struct sendfile_s sf = { .pos = offset, .n = n, .fd = fd } ;
tain deadline ;
tain_add_g(&deadline, &g.writetto) ;
if (!buffer_timed_flush_g(buffer_1, &deadline))
strerr_diefu2sys(111, "write", " to stdout") ;
if (!timed_flush_g(&sf, &s_getfd, &s_isnonempty, &s_flush, &deadline))
strerr_diefu3sys(111, "sendfile ", fn, " to stdout") ;
}
#else
#ifdef SKALIBS_HASSPLICE
#include <skalibs/nonposix.h>
#include <fcntl.h>
#include <stdint.h>
#include <unistd.h>
#include <skalibs/uint64.h>
#include <skalibs/strerr.h>
#include <skalibs/tai.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-timed.h>
#include "tipideed-internal.h"
void init_splice_pipe (void)
{
if (pipenbcoe(g.p) == -1)
strerr_diefu1sys(111, "pipe2") ;
}
struct spliceinfo_s
{
ssize_t n ;
uint32_t last : 1 ;
} ;
static int getfd (void *b)
{
(void)b ;
return 1 ;
}
static int isnonempty (void *b)
{
struct spliceinfo_s *si = b ;
return !!si->n ;
}
static int flush (void *b)
{
struct spliceinfo_s *si = b ;
while (si->n)
{
ssize_t r = splice(g.p[0], 0, 1, 0, si->n, SPLICE_F_NONBLOCK | (si->last ? 0 : SPLICE_F_MORE)) ;
if (r == -1) return 0 ;
if (!r) return 1 ;
si->n -= r ;
}
return 1 ;
}
void send_file_range (int fd, uint64_t offset, uint64_t n, char const *fn)
{
tain deadline ;
struct spliceinfo_s si = { .last = 0 } ;
tain_add_g(&deadline, &g.writetto) ;
if (!buffer_timed_flush_g(buffer_1, &deadline))
strerr_diefu2sys(111, "write", " to stdout") ;
while (n)
{
si.n = splice(fd, &offset, g.p[1], 0, n, 0) ;
if (si.n == -1) strerr_diefu2sys(111, "read from ", fn) ;
else if (!si.n) strerr_diefu3x(111, "serve ", fn, ": file was truncated") ;
else if (si.n > n)
{
si.n = n ;
strerr_warnw2x("serving elongated file: ", fn) ;
}
n -= si.n ;
if (!n) si.last = 1 ;
tain_add_g(&deadline, &g.writetto) ;
if (!timed_flush_g(&si, &getfd, &isnonempty, &flush, &deadline))
strerr_diefu2sys(111, "splice", " to stdout") ;
}
}
#else
#include <sys/uio.h>
#include <unistd.h>
#include <stdint.h>
#include <skalibs/uint64.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/buffer.h>
#include <skalibs/strerr.h>
#include <skalibs/tai.h>
#include <skalibs/unix-timed.h>
#include "tipideed-internal.h"
void init_splice_pipe (void)
{
}
void send_file_range (int fd, uint64_t offset, uint64_t n, char const *fn)
{
tain deadline ;
struct iovec v[2] ;
ssize_t r ;
if (!n) goto flushit ; /* I know, I know, but do-while SUCKS */
if (offset && lseek(fd, offset, SEEK_SET) == -1)
strerr_diefu2sys(111, "lseek on ", fn) ;
fillit:
buffer_wpeek(buffer_1, v) ;
r = allreadv(fd, v, 2) ;
if (r == -1) strerr_diefu2sys(111, "read from ", fn) ;
if (!r) strerr_diefu3x(111, "serve ", fn, ": file was truncated") ;
if (r > n)
{
r = n ;
strerr_warnw2x("serving elongated file: ", fn) ;
}
buffer_wseek(buffer_1, r) ;
n -= r ;
flushit:
tain_add_g(&deadline, &g.writetto) ;
if (!buffer_timed_flush_g(buffer_1, &deadline))
strerr_diefu1sys(111, "write to stdout") ;
if (n) goto fillit ;
}
#endif
#endif
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