IO.xs revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
* This program is free software; you can redistribute it and/or
* modify it under the same terms as Perl itself.
*/
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#define PERLIO_NOT_STDIO 1
#include "perl.h"
#include "XSUB.h"
#include "poll.h"
#ifdef I_UNISTD
# include <unistd.h>
#endif
#if defined(I_FCNTL) || defined(HAS_FCNTL)
# include <fcntl.h>
#endif
#ifdef PerlIO
typedef int SysRet;
typedef PerlIO * InputStream;
typedef PerlIO * OutputStream;
#else
#define PERLIO_IS_STDIO 1
typedef int SysRet;
typedef FILE * InputStream;
typedef FILE * OutputStream;
#endif
#define MY_start_subparse(fmt,flags) start_subparse(fmt,flags)
#ifndef gv_stashpvn
#define gv_stashpvn(str,len,flags) gv_stashpv(str,flags)
#endif
static int
not_here(char *s)
{
croak("%s not implemented on this architecture", s);
return -1;
}
#ifndef PerlIO
#define PerlIO_fileno(f) fileno(f)
#endif
static int
io_blocking(InputStream f, int block)
{
int RETVAL;
if(!f) {
errno = EBADF;
return -1;
}
#if defined(HAS_FCNTL)
RETVAL = fcntl(PerlIO_fileno(f), F_GETFL, 0);
if (RETVAL >= 0) {
int mode = RETVAL;
#ifdef O_NONBLOCK
/* POSIX style */
#if defined(O_NDELAY) && O_NDELAY != O_NONBLOCK
/* Ooops has O_NDELAY too - make sure we don't
* get SysV behaviour by mistake. */
/* E.g. In UNICOS and UNICOS/mk a F_GETFL returns an O_NDELAY
* after a successful F_SETFL of an O_NONBLOCK. */
RETVAL = RETVAL & (O_NONBLOCK | O_NDELAY) ? 0 : 1;
if (block >= 0) {
if ((mode & O_NDELAY) || ((block == 0) && !(mode & O_NONBLOCK))) {
int ret;
mode = (mode & ~O_NDELAY) | O_NONBLOCK;
ret = fcntl(PerlIO_fileno(f),F_SETFL,mode);
if(ret < 0)
RETVAL = ret;
}
else
if ((mode & O_NDELAY) || ((block > 0) && (mode & O_NONBLOCK))) {
int ret;
mode &= ~(O_NONBLOCK | O_NDELAY);
ret = fcntl(PerlIO_fileno(f),F_SETFL,mode);
if(ret < 0)
RETVAL = ret;
}
}
#else
/* Standard POSIX */
RETVAL = RETVAL & O_NONBLOCK ? 0 : 1;
if ((block == 0) && !(mode & O_NONBLOCK)) {
int ret;
mode |= O_NONBLOCK;
ret = fcntl(PerlIO_fileno(f),F_SETFL,mode);
if(ret < 0)
RETVAL = ret;
}
else if ((block > 0) && (mode & O_NONBLOCK)) {
int ret;
mode &= ~O_NONBLOCK;
ret = fcntl(PerlIO_fileno(f),F_SETFL,mode);
if(ret < 0)
RETVAL = ret;
}
#endif
#else
/* Not POSIX - better have O_NDELAY or we can't cope.
* for BSD-ish machines this is an acceptable alternative
* for SysV we can't tell "would block" from EOF but that is
* the way SysV is...
*/
RETVAL = RETVAL & O_NDELAY ? 0 : 1;
if ((block == 0) && !(mode & O_NDELAY)) {
int ret;
mode |= O_NDELAY;
ret = fcntl(PerlIO_fileno(f),F_SETFL,mode);
if(ret < 0)
RETVAL = ret;
}
else if ((block > 0) && (mode & O_NDELAY)) {
int ret;
mode &= ~O_NDELAY;
ret = fcntl(PerlIO_fileno(f),F_SETFL,mode);
if(ret < 0)
RETVAL = ret;
}
#endif
}
return RETVAL;
#else
return -1;
#endif
}
MODULE = IO PACKAGE = IO::Seekable PREFIX = f
void
fgetpos(handle)
InputStream handle
CODE:
if (handle) {
Fpos_t pos;
if (
#ifdef PerlIO
PerlIO_getpos(handle, &pos)
#else
fgetpos(handle, &pos)
#endif
) {
ST(0) = &PL_sv_undef;
} else {
ST(0) = sv_2mortal(newSVpv((char*)&pos, sizeof(Fpos_t)));
}
}
else {
ST(0) = &PL_sv_undef;
errno = EINVAL;
}
SysRet
fsetpos(handle, pos)
InputStream handle
SV * pos
CODE:
char *p;
STRLEN len;
if (handle && (p = SvPV(pos,len)) && len == sizeof(Fpos_t))
#ifdef PerlIO
RETVAL = PerlIO_setpos(handle, (Fpos_t*)p);
#else
RETVAL = fsetpos(handle, (Fpos_t*)p);
#endif
else {
RETVAL = -1;
errno = EINVAL;
}
OUTPUT:
RETVAL
MODULE = IO PACKAGE = IO::File PREFIX = f
void
new_tmpfile(packname = "IO::File")
char * packname
PREINIT:
OutputStream fp;
GV *gv;
CODE:
#ifdef PerlIO
fp = PerlIO_tmpfile();
#else
fp = tmpfile();
#endif
gv = (GV*)SvREFCNT_inc(newGVgen(packname));
hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
if (do_open(gv, "+>&", 3, FALSE, 0, 0, fp)) {
ST(0) = sv_2mortal(newRV((SV*)gv));
sv_bless(ST(0), gv_stashpv(packname, TRUE));
SvREFCNT_dec(gv); /* undo increment in newRV() */
}
else {
ST(0) = &PL_sv_undef;
SvREFCNT_dec(gv);
}
MODULE = IO PACKAGE = IO::Poll
void
_poll(timeout,...)
int timeout;
PPCODE:
{
#ifdef HAS_POLL
int nfd = (items - 1) / 2;
SV *tmpsv = NEWSV(999,nfd * sizeof(struct pollfd));
struct pollfd *fds = (struct pollfd *)SvPVX(tmpsv);
int i,j,ret;
for(i=1, j=0 ; j < nfd ; j++) {
fds[j].fd = SvIV(ST(i));
i++;
fds[j].events = SvIV(ST(i));
i++;
fds[j].revents = 0;
}
if((ret = poll(fds,nfd,timeout)) >= 0) {
for(i=1, j=0 ; j < nfd ; j++) {
sv_setiv(ST(i), fds[j].fd); i++;
sv_setiv(ST(i), fds[j].revents); i++;
}
}
SvREFCNT_dec(tmpsv);
XSRETURN_IV(ret);
#else
not_here("IO::Poll::poll");
#endif
}
MODULE = IO PACKAGE = IO::Handle PREFIX = io_
void
io_blocking(handle,blk=-1)
InputStream handle
int blk
PROTOTYPE: $;$
CODE:
{
int ret = io_blocking(handle, items == 1 ? -1 : blk ? 1 : 0);
if(ret >= 0)
XSRETURN_IV(ret);
else
XSRETURN_UNDEF;
}
MODULE = IO PACKAGE = IO::Handle PREFIX = f
int
ungetc(handle, c)
InputStream handle
int c
CODE:
if (handle)
#ifdef PerlIO
RETVAL = PerlIO_ungetc(handle, c);
#else
RETVAL = ungetc(c, handle);
#endif
else {
RETVAL = -1;
errno = EINVAL;
}
OUTPUT:
RETVAL
int
ferror(handle)
InputStream handle
CODE:
if (handle)
#ifdef PerlIO
RETVAL = PerlIO_error(handle);
#else
RETVAL = ferror(handle);
#endif
else {
RETVAL = -1;
errno = EINVAL;
}
OUTPUT:
RETVAL
int
clearerr(handle)
InputStream handle
CODE:
if (handle) {
#ifdef PerlIO
PerlIO_clearerr(handle);
#else
clearerr(handle);
#endif
RETVAL = 0;
}
else {
RETVAL = -1;
errno = EINVAL;
}
OUTPUT:
RETVAL
int
untaint(handle)
SV * handle
CODE:
#ifdef IOf_UNTAINT
IO * io;
io = sv_2io(handle);
if (io) {
IoFLAGS(io) |= IOf_UNTAINT;
RETVAL = 0;
}
else {
#endif
RETVAL = -1;
errno = EINVAL;
#ifdef IOf_UNTAINT
}
#endif
OUTPUT:
RETVAL
SysRet
fflush(handle)
OutputStream handle
CODE:
if (handle)
#ifdef PerlIO
RETVAL = PerlIO_flush(handle);
#else
RETVAL = Fflush(handle);
#endif
else {
RETVAL = -1;
errno = EINVAL;
}
OUTPUT:
RETVAL
void
setbuf(handle, buf)
OutputStream handle
char * buf = SvPOK(ST(1)) ? sv_grow(ST(1), BUFSIZ) : 0;
CODE:
if (handle)
#ifdef PERLIO_IS_STDIO
setbuf(handle, buf);
#else
not_here("IO::Handle::setbuf");
#endif
SysRet
setvbuf(handle, buf, type, size)
OutputStream handle
char * buf = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
int type
int size
CODE:
#if defined(PERLIO_IS_STDIO) && defined(_IOFBF) && defined(HAS_SETVBUF)
if (!handle) /* Try input stream. */
handle = IoIFP(sv_2io(ST(0)));
if (handle)
RETVAL = setvbuf(handle, buf, type, size);
else {
RETVAL = -1;
errno = EINVAL;
}
#else
RETVAL = (SysRet) not_here("IO::Handle::setvbuf");
#endif
OUTPUT:
RETVAL
SysRet
fsync(handle)
OutputStream handle
CODE:
#ifdef HAS_FSYNC
if(handle)
RETVAL = fsync(PerlIO_fileno(handle));
else {
RETVAL = -1;
errno = EINVAL;
}
#else
RETVAL = (SysRet) not_here("IO::Handle::sync");
#endif
OUTPUT:
RETVAL
BOOT:
{
HV *stash;
/*
* constant subs for IO::Poll
*/
stash = gv_stashpvn("IO::Poll", 8, TRUE);
#ifdef POLLIN
newCONSTSUB(stash,"POLLIN",newSViv(POLLIN));
#endif
#ifdef POLLPRI
newCONSTSUB(stash,"POLLPRI", newSViv(POLLPRI));
#endif
#ifdef POLLOUT
newCONSTSUB(stash,"POLLOUT", newSViv(POLLOUT));
#endif
#ifdef POLLRDNORM
newCONSTSUB(stash,"POLLRDNORM", newSViv(POLLRDNORM));
#endif
#ifdef POLLWRNORM
newCONSTSUB(stash,"POLLWRNORM", newSViv(POLLWRNORM));
#endif
#ifdef POLLRDBAND
newCONSTSUB(stash,"POLLRDBAND", newSViv(POLLRDBAND));
#endif
#ifdef POLLWRBAND
newCONSTSUB(stash,"POLLWRBAND", newSViv(POLLWRBAND));
#endif
#ifdef POLLNORM
newCONSTSUB(stash,"POLLNORM", newSViv(POLLNORM));
#endif
#ifdef POLLERR
newCONSTSUB(stash,"POLLERR", newSViv(POLLERR));
#endif
#ifdef POLLHUP
newCONSTSUB(stash,"POLLHUP", newSViv(POLLHUP));
#endif
#ifdef POLLNVAL
newCONSTSUB(stash,"POLLNVAL", newSViv(POLLNVAL));
#endif
/*
* constant subs for IO::Handle
*/
stash = gv_stashpvn("IO::Handle", 10, TRUE);
#ifdef _IOFBF
newCONSTSUB(stash,"_IOFBF", newSViv(_IOFBF));
#endif
#ifdef _IOLBF
newCONSTSUB(stash,"_IOLBF", newSViv(_IOLBF));
#endif
#ifdef _IONBF
newCONSTSUB(stash,"_IONBF", newSViv(_IONBF));
#endif
#ifdef SEEK_SET
newCONSTSUB(stash,"SEEK_SET", newSViv(SEEK_SET));
#endif
#ifdef SEEK_CUR
newCONSTSUB(stash,"SEEK_CUR", newSViv(SEEK_CUR));
#endif
#ifdef SEEK_END
newCONSTSUB(stash,"SEEK_END", newSViv(SEEK_END));
#endif
}