[perl5.git] / dist / IO / IO.xs

/*
 * 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_EXT_IO

#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

#ifndef SIOCATMARK
#   ifdef I_SYS_SOCKIO
#       include <sys/sockio.h>
#   endif
#endif

#ifdef PerlIO
#if defined(MACOS_TRADITIONAL) && defined(USE_SFIO)
#define PERLIO_IS_STDIO 1
#undef setbuf
#undef setvbuf
#define setvbuf		_stdsetvbuf
#define setbuf(f,b)	( __sf_setbuf(f,b) )
#endif
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

#ifndef __attribute__noreturn__
#  define __attribute__noreturn__
#endif

#ifndef NORETURN_FUNCTION_END
# define NORETURN_FUNCTION_END /* NOT REACHED */ return 0
#endif

#ifndef dVAR
#  define dVAR dNOOP
#endif

#ifndef OpSIBLING
#  define OpSIBLING(o) (o)->op_sibling
#endif

static int not_here(const char *s) __attribute__noreturn__;
static int
not_here(const char *s)
{
    croak("%s not implemented on this architecture", s);
    NORETURN_FUNCTION_END;
}

#ifndef UVCHR_IS_INVARIANT   /* For use with Perls without this macro */
#   if ('A' == 65)
#       define UVCHR_IS_INVARIANT(cp) ((cp) < 128)
#   elif (defined(NATIVE_IS_INVARIANT)) /* EBCDIC on old Perl */
#       define UVCHR_IS_INVARIANT(cp) ((cp) < 256 && NATIVE_IS_INVARIANT(cp))
#   elif defined(isASCII)    /* EBCDIC on very old Perl */
        /* In EBCDIC, the invariants are the code points corresponding to ASCII,
         * plus all the controls.  All but one EBCDIC control is below SPACE; it
         * varies depending on the code page, determined by the ord of '^' */
#       define UVCHR_IS_INVARIANT(cp) (isASCII(cp)                            \
                                       || (cp) < ' '                          \
                                       || (('^' == 106)    /* POSIX-BC */     \
                                          ? (cp) == 95                        \
                                          : (cp) == 0xFF)) /* 1047 or 037 */
#   else    /* EBCDIC on very very old Perl */
        /* This assumes isascii() is available, but that could be fixed by
         * having the macro test for each printable ASCII char */
#       define UVCHR_IS_INVARIANT(cp) (isascii(cp)                            \
                                       || (cp) < ' '                          \
                                       || (('^' == 106)    /* POSIX-BC */     \
                                          ? (cp) == 95                        \
                                          : (cp) == 0xFF)) /* 1047 or 037 */
#   endif
#endif


#ifndef PerlIO
#define PerlIO_fileno(f) fileno(f)
#endif

static int
io_blocking(pTHX_ InputStream f, int block)
{
    int fd = -1;
#if defined(HAS_FCNTL)
    int RETVAL;
    if (!f) {
	errno = EBADF;
	return -1;
    }
    fd = PerlIO_fileno(f);
    if (fd < 0) {
      errno = EBADF;
      return -1;
    }
    RETVAL = fcntl(fd, F_GETFL, 0);
    if (RETVAL >= 0) {
	int mode = RETVAL;
	int newmode = mode;
#ifdef O_NONBLOCK
	/* POSIX style */

# ifndef O_NDELAY
#  define O_NDELAY O_NONBLOCK
# endif
	/* Note: 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) {
	    newmode &= ~O_NDELAY;
	    newmode |= O_NONBLOCK;
	} else if (block > 0) {
	    newmode &= ~(O_NDELAY|O_NONBLOCK);
	}
#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) {
	    newmode |= O_NDELAY;
	} else if (block > 0) {
	    newmode &= ~O_NDELAY;
	}
#endif
	if (newmode != mode) {
            const int ret = fcntl(fd, F_SETFL, newmode);
	    if (ret < 0)
		RETVAL = ret;
	}
    }
    return RETVAL;
#else
#   ifdef WIN32
    if (block >= 0) {
	unsigned long flags = !block;
	/* ioctl claims to take char* but really needs a u_long sized buffer */
	const int ret = ioctl(fd, FIONBIO, (char*)&flags);
	if (ret != 0)
	    return -1;
	/* Win32 has no way to get the current blocking status of a socket.
	 * However, we don't want to just return undef, because there's no way
	 * to tell that the ioctl succeeded.
	 */
	return flags;
    }
    /* TODO: Perhaps set $! to ENOTSUP? */
    return -1;
#   else
    return -1;
#   endif
#endif
}

static OP *
io_pp_nextstate(pTHX)
{
    dVAR;
    COP *old_curcop = PL_curcop;
    OP *next = PL_ppaddr[PL_op->op_type](aTHX);
    PL_curcop = old_curcop;
    return next;
}

static OP *
io_ck_lineseq(pTHX_ OP *o)
{
    OP *kid = cBINOPo->op_first;
    for (; kid; kid = OpSIBLING(kid))
	if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
	    kid->op_ppaddr = io_pp_nextstate;
    return o;
}


MODULE = IO	PACKAGE = IO::Seekable	PREFIX = f

void
fgetpos(handle)
	InputStream	handle
    CODE:
	if (handle) {
#ifdef PerlIO
#if PERL_VERSION < 8
	    Fpos_t pos;
	    ST(0) = sv_newmortal();
	    if (PerlIO_getpos(handle, &pos) != 0) {
		ST(0) = &PL_sv_undef;
	    }
	    else {
		sv_setpvn(ST(0), (char *)&pos, sizeof(Fpos_t));
	    }
#else
	    ST(0) = sv_newmortal();
	    if (PerlIO_getpos(handle, ST(0)) != 0) {
		ST(0) = &PL_sv_undef;
	    }
#endif
#else
	    Fpos_t pos;
	    if (fgetpos(handle, &pos)) {
		ST(0) = &PL_sv_undef;
	    } else {
#  if PERL_VERSION >= 11
		ST(0) = newSVpvn_flags((char*)&pos, sizeof(Fpos_t), SVs_TEMP);
#  else
		ST(0) = sv_2mortal(newSVpvn((char*)&pos, sizeof(Fpos_t)));
#  endif
	    }
#endif
	}
	else {
	    errno = EINVAL;
	    ST(0) = &PL_sv_undef;
	}

SysRet
fsetpos(handle, pos)
	InputStream	handle
	SV *		pos
    CODE:
	if (handle) {
#ifdef PerlIO
#if PERL_VERSION < 8
	    char *p;
	    STRLEN len;
	    if (SvOK(pos) && (p = SvPV(pos,len)) && len == sizeof(Fpos_t)) {
		RETVAL = PerlIO_setpos(handle, (Fpos_t*)p);
	    }
	    else {
		RETVAL = -1;
		errno = EINVAL;
	    }
#else
	    RETVAL = PerlIO_setpos(handle, pos);
#endif
#else
	    char *p;
	    STRLEN len;
	    if ((p = SvPV(pos,len)) && len == sizeof(Fpos_t)) {
		RETVAL = fsetpos(handle, (Fpos_t*)p);
	    }
	    else {
		RETVAL = -1;
		errno = EINVAL;
	    }
#endif
	}
	else {
	    RETVAL = -1;
	    errno = EINVAL;
	}
    OUTPUT:
	RETVAL

MODULE = IO	PACKAGE = IO::File	PREFIX = f

void
new_tmpfile(packname = "IO::File")
    const char * packname
    PREINIT:
	OutputStream fp;
	GV *gv;
    CODE:
#ifdef PerlIO
	fp = PerlIO_tmpfile();
#else
	fp = tmpfile();
#endif
	gv = (GV*)SvREFCNT_inc(newGVgen(packname));
	if (gv)
	    (void) hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
	if (gv && 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
    const int nfd = (items - 1) / 2;
    SV *tmpsv = sv_2mortal(NEWSV(999,nfd * sizeof(struct pollfd)));
    /* We should pass _some_ valid pointer even if nfd is zero, but it
     * doesn't matter what it is, since we're telling it to not check any fds.
     */
    struct pollfd *fds = nfd ? (struct pollfd *)SvPVX(tmpsv) : (struct pollfd *)tmpsv;
    int i,j,ret;
    for(i=1, j=0  ; j < nfd ; j++) {
	fds[j].fd = SvIV(ST(i));
	i++;
	fds[j].events = (short)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++;
	}
    }
    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:
{
    const int ret = io_blocking(aTHX_ 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
	SV *	        c
    CODE:
	if (handle) {
#ifdef PerlIO
            UV v;

            if ((SvIOK_notUV(c) && SvIV(c) < 0) || (SvNOK(c) && SvNV(c) < 0.0))
                croak("Negative character number in ungetc()");

            v = SvUV(c);
            if (UVCHR_IS_INVARIANT(v) || (v <= 0xFF && !PerlIO_isutf8(handle)))
                RETVAL = PerlIO_ungetc(handle, (int)v);
            else {
                U8 buf[UTF8_MAXBYTES + 1], *end;
                Size_t len;

                if (!PerlIO_isutf8(handle))
                    croak("Wide character number in ungetc()");

                /* This doesn't warn for non-chars, surrogate, and
                 * above-Unicodes */
                end = uvchr_to_utf8_flags(buf, v, 0);
                len = end - buf;
                if ((Size_t)PerlIO_unread(handle, &buf, len) == len)
                    XSRETURN_UV(v);
                else
                    RETVAL = EOF;
            }
#else
            RETVAL = ungetc((int)SvIV(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, ...)
	OutputStream	handle
    CODE:
	if (handle)
#ifdef PERLIO_IS_STDIO
        {
	    char *buf = items == 2 && SvPOK(ST(1)) ?
	      sv_grow(ST(1), BUFSIZ) : 0;
	    setbuf(handle, buf);
	}
#else
	    not_here("IO::Handle::setbuf");
#endif

SysRet
setvbuf(...)
    CODE:
	if (items != 4)
            Perl_croak(aTHX_ "Usage: IO::Handle::setvbuf(handle, buf, type, size)");
#if defined(PERLIO_IS_STDIO) && defined(_IOFBF) && defined(HAS_SETVBUF)
    {
        OutputStream	handle = 0;
	char *		buf = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
	int		type;
	int		size;

	if (items == 4) {
	    handle = IoOFP(sv_2io(ST(0)));
	    buf    = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
	    type   = (int)SvIV(ST(2));
	    size   = (int)SvIV(ST(3));
	}
	if (!handle)			/* Try input stream. */
	    handle = IoIFP(sv_2io(ST(0)));
	if (items == 4 && 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(arg)
	SV * arg
    PREINIT:
	OutputStream handle = NULL;
    CODE:
#ifdef HAS_FSYNC
	handle = IoOFP(sv_2io(arg));
	if (!handle)
	    handle = IoIFP(sv_2io(arg));
	if (handle) {
	    int fd = PerlIO_fileno(handle);
	    if (fd >= 0) {
		RETVAL = fsync(fd);
	    } else {
		RETVAL = -1;
		errno = EBADF;
	    }
	} else {
	    RETVAL = -1;
	    errno = EINVAL;
	}
#else
	RETVAL = (SysRet) not_here("IO::Handle::sync");
#endif
    OUTPUT:
	RETVAL

SV *
_create_getline_subs(const char *code)
    CODE:
	OP *(*io_old_ck_lineseq)(pTHX_ OP *) = PL_check[OP_LINESEQ];
	PL_check[OP_LINESEQ] = io_ck_lineseq;
	RETVAL = SvREFCNT_inc(eval_pv(code,FALSE));
	PL_check[OP_LINESEQ] = io_old_ck_lineseq;
    OUTPUT:
	RETVAL


MODULE = IO	PACKAGE = IO::Socket

SysRet
sockatmark (sock)
   InputStream sock
   PROTOTYPE: $
   PREINIT:
     int fd;
   CODE:
     fd = PerlIO_fileno(sock);
     if (fd < 0) {
       errno = EBADF;
       RETVAL = -1;
     }
#ifdef HAS_SOCKATMARK
     else {
       RETVAL = sockatmark(fd);
     }
#else
     else {
       int flag = 0;
#   ifdef SIOCATMARK
#     if defined(NETWARE) || defined(WIN32)
       if (ioctl(fd, SIOCATMARK, (char*)&flag) != 0)
#     else
       if (ioctl(fd, SIOCATMARK, &flag) != 0)
#     endif
	 XSRETURN_UNDEF;
#   else
       not_here("IO::Socket::atmark");
#   endif
       RETVAL = flag;
     }
#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
}
Commit	Line	Data
cf7fe8a2 GS	1	/*
	2	* Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
	3	* This program is free software; you can redistribute it and/or
	4	* modify it under the same terms as Perl itself.
	5	*/
	6
6e22d046 JH	7	#define PERL_EXT_IO
6e22d046 JH	8
c5be433b	9	#define PERL_NO_GET_CONTEXT
8add82fc	10	#include "EXTERN.h"
760ac839	11	#define PERLIO_NOT_STDIO 1
8add82fc	12	#include "perl.h"
8add82fc	13	#include "XSUB.h"
cf7fe8a2	14	#include "poll.h"
8add82fc	15	#ifdef I_UNISTD
	16	# include <unistd.h>
	17	#endif
cf7fe8a2	18	#if defined(I_FCNTL) \|\| defined(HAS_FCNTL)
760ac839 LW	19	# include <fcntl.h>
760ac839 LW	20	#endif
8add82fc	21
63a347c7 JH	22	#ifndef SIOCATMARK
	23	# ifdef I_SYS_SOCKIO
	24	# include <sys/sockio.h>
	25	# endif
	26	#endif
	27
2a0cf753	28	#ifdef PerlIO
eb44fba6	29	#if defined(MACOS_TRADITIONAL) && defined(USE_SFIO)
824215e2 JH	30	#define PERLIO_IS_STDIO 1
	31	#undef setbuf
	32	#undef setvbuf
	33	#define setvbuf _stdsetvbuf
	34	#define setbuf(f,b) ( __sf_setbuf(f,b) )
	35	#endif
8add82fc	36	typedef int SysRet;
760ac839 LW	37	typedef PerlIO * InputStream;
760ac839 LW	38	typedef PerlIO * OutputStream;
2a0cf753	39	#else
	40	#define PERLIO_IS_STDIO 1
	41	typedef int SysRet;
	42	typedef FILE * InputStream;
	43	typedef FILE * OutputStream;
	44	#endif
8add82fc	45
cceca5ed	46	#define MY_start_subparse(fmt,flags) start_subparse(fmt,flags)
cf7fe8a2 GS	47
	48	#ifndef gv_stashpvn
	49	#define gv_stashpvn(str,len,flags) gv_stashpv(str,flags)
	50	#endif
	51
35a60386 RGS	52	#ifndef __attribute__noreturn__
	53	# define __attribute__noreturn__
	54	#endif
	55
	56	#ifndef NORETURN_FUNCTION_END
	57	# define NORETURN_FUNCTION_END /* NOT REACHED */ return 0
	58	#endif
	59
986a805c FC	60	#ifndef dVAR
	61	# define dVAR dNOOP
	62	#endif
	63
e6dae479 FC	64	#ifndef OpSIBLING
e6dae479 FC	65	# define OpSIBLING(o) (o)->op_sibling
5a3da92c FC	66	#endif
5a3da92c FC	67
7698c435	68	static int not_here(const char *s) __attribute__noreturn__;
8add82fc	69	static int
7698c435	70	not_here(const char *s)
8add82fc	71	{
8add82fc	72	croak("%s not implemented on this architecture", s);
c38693a5	73	NORETURN_FUNCTION_END;
8add82fc	74	}
8add82fc	75
6ed60307 KW	76	#ifndef UVCHR_IS_INVARIANT /* For use with Perls without this macro */
	77	# if ('A' == 65)
	78	# define UVCHR_IS_INVARIANT(cp) ((cp) < 128)
	79	# elif (defined(NATIVE_IS_INVARIANT)) /* EBCDIC on old Perl */
	80	# define UVCHR_IS_INVARIANT(cp) ((cp) < 256 && NATIVE_IS_INVARIANT(cp))
	81	# elif defined(isASCII) /* EBCDIC on very old Perl */
	82	/* In EBCDIC, the invariants are the code points corresponding to ASCII,
	83	* plus all the controls. All but one EBCDIC control is below SPACE; it
	84	* varies depending on the code page, determined by the ord of '^' */
	85	# define UVCHR_IS_INVARIANT(cp) (isASCII(cp) \
	86	\|\| (cp) < ' ' \
	87	\|\| (('^' == 106) /* POSIX-BC */ \
	88	? (cp) == 95 \
	89	: (cp) == 0xFF)) /* 1047 or 037 */
	90	# else /* EBCDIC on very very old Perl */
	91	/* This assumes isascii() is available, but that could be fixed by
	92	* having the macro test for each printable ASCII char */
	93	# define UVCHR_IS_INVARIANT(cp) (isascii(cp) \
	94	\|\| (cp) < ' ' \
	95	\|\| (('^' == 106) /* POSIX-BC */ \
	96	? (cp) == 95 \
	97	: (cp) == 0xFF)) /* 1047 or 037 */
	98	# endif
	99	#endif
	100
cf7fe8a2 GS	101
	102	#ifndef PerlIO
	103	#define PerlIO_fileno(f) fileno(f)
8add82fc	104	#endif
cf7fe8a2 GS	105
cf7fe8a2 GS	106	static int
e87a358a	107	io_blocking(pTHX_ InputStream f, int block)
cf7fe8a2	108	{
375ed12a	109	int fd = -1;
91f3b821	110	#if defined(HAS_FCNTL)
cf7fe8a2	111	int RETVAL;
375ed12a	112	if (!f) {
cf7fe8a2 GS	113	errno = EBADF;
	114	return -1;
	115	}
375ed12a JH	116	fd = PerlIO_fileno(f);
	117	if (fd < 0) {
	118	errno = EBADF;
	119	return -1;
	120	}
	121	RETVAL = fcntl(fd, F_GETFL, 0);
cf7fe8a2 GS	122	if (RETVAL >= 0) {
cf7fe8a2 GS	123	int mode = RETVAL;
3b2f3eeb	124	int newmode = mode;
cf7fe8a2	125	#ifdef O_NONBLOCK
766a733e	126	/* POSIX style */
cf7fe8a2	127
3b2f3eeb BD	128	# ifndef O_NDELAY
	129	# define O_NDELAY O_NONBLOCK
	130	# endif
	131	/* Note: UNICOS and UNICOS/mk a F_GETFL returns an O_NDELAY
6fd254a4 JH	132	* after a successful F_SETFL of an O_NONBLOCK. */
	133	RETVAL = RETVAL & (O_NONBLOCK \| O_NDELAY) ? 0 : 1;
	134
3b2f3eeb BD	135	if (block == 0) {
	136	newmode &= ~O_NDELAY;
	137	newmode \|= O_NONBLOCK;
	138	} else if (block > 0) {
	139	newmode &= ~(O_NDELAY\|O_NONBLOCK);
cf7fe8a2	140	}
8add82fc	141	#else
cf7fe8a2 GS	142	/* Not POSIX - better have O_NDELAY or we can't cope.
cf7fe8a2 GS	143	* for BSD-ish machines this is an acceptable alternative
766a733e	144	* for SysV we can't tell "would block" from EOF but that is
cf7fe8a2 GS	145	* the way SysV is...
	146	*/
	147	RETVAL = RETVAL & O_NDELAY ? 0 : 1;
	148
3b2f3eeb BD	149	if (block == 0) {
	150	newmode \|= O_NDELAY;
	151	} else if (block > 0) {
	152	newmode &= ~O_NDELAY;
	153	}
	154	#endif
	155	if (newmode != mode) {
375ed12a	156	const int ret = fcntl(fd, F_SETFL, newmode);
3b2f3eeb	157	if (ret < 0)
cf7fe8a2	158	RETVAL = ret;
3b2f3eeb	159	}
cf7fe8a2 GS	160	}
cf7fe8a2 GS	161	return RETVAL;
8add82fc	162	#else
20caf59d	163	# ifdef WIN32
f5458e3a	164	if (block >= 0) {
1320cbfc	165	unsigned long flags = !block;
f5458e3a	166	/* ioctl claims to take char* but really needs a u_long sized buffer */
375ed12a	167	const int ret = ioctl(fd, FIONBIO, (char*)&flags);
f5458e3a SO	168	if (ret != 0)
	169	return -1;
	170	/* Win32 has no way to get the current blocking status of a socket.
	171	* However, we don't want to just return undef, because there's no way
	172	* to tell that the ioctl succeeded.
	173	*/
	174	return flags;
	175	}
	176	/* TODO: Perhaps set $! to ENOTSUP? */
	177	return -1;
20caf59d	178	# else
91f3b821	179	return -1;
20caf59d	180	# endif
8add82fc	181	#endif
8add82fc	182	}
8add82fc	183
986a805c FC	184	static OP *
	185	io_pp_nextstate(pTHX)
	186	{
	187	dVAR;
	188	COP *old_curcop = PL_curcop;
	189	OP *next = PL_ppaddr[PL_op->op_type](aTHX);
	190	PL_curcop = old_curcop;
	191	return next;
	192	}
	193
	194	static OP *
	195	io_ck_lineseq(pTHX_ OP *o)
	196	{
	197	OP *kid = cBINOPo->op_first;
e6dae479	198	for (; kid; kid = OpSIBLING(kid))
986a805c FC	199	if (kid->op_type == OP_NEXTSTATE \|\| kid->op_type == OP_DBSTATE)
	200	kid->op_ppaddr = io_pp_nextstate;
	201	return o;
	202	}
	203
	204
8add82fc	205	MODULE = IO PACKAGE = IO::Seekable PREFIX = f
8add82fc	206
8063af02	207	void
8add82fc	208	fgetpos(handle)
	209	InputStream handle
	210	CODE:
8add82fc	211	if (handle) {
2a0cf753	212	#ifdef PerlIO
35a60386	213	#if PERL_VERSION < 8
86413ec0 SH	214	Fpos_t pos;
86413ec0 SH	215	ST(0) = sv_newmortal();
35a60386 RGS	216	if (PerlIO_getpos(handle, &pos) != 0) {
	217	ST(0) = &PL_sv_undef;
	218	}
	219	else {
	220	sv_setpvn(ST(0), (char *)&pos, sizeof(Fpos_t));
	221	}
	222	#else
86413ec0	223	ST(0) = sv_newmortal();
766a733e NIS	224	if (PerlIO_getpos(handle, ST(0)) != 0) {
	225	ST(0) = &PL_sv_undef;
	226	}
35a60386	227	#endif
2a0cf753	228	#else
35a60386	229	Fpos_t pos;
766a733e	230	if (fgetpos(handle, &pos)) {
a6a714bd NC	231	ST(0) = &PL_sv_undef;
a6a714bd NC	232	} else {
c7cffa0b NC	233	# if PERL_VERSION >= 11
	234	ST(0) = newSVpvn_flags((char*)&pos, sizeof(Fpos_t), SVs_TEMP);
	235	# else
35a60386	236	ST(0) = sv_2mortal(newSVpvn((char*)&pos, sizeof(Fpos_t)));
c7cffa0b	237	# endif
a6a714bd	238	}
766a733e	239	#endif
8add82fc	240	}
8add82fc	241	else {
8add82fc	242	errno = EINVAL;
35a60386	243	ST(0) = &PL_sv_undef;
8add82fc	244	}
8add82fc	245
	246	SysRet
	247	fsetpos(handle, pos)
	248	InputStream handle
	249	SV * pos
	250	CODE:
766a733e	251	if (handle) {
2a0cf753	252	#ifdef PerlIO
35a60386 RGS	253	#if PERL_VERSION < 8
	254	char *p;
	255	STRLEN len;
	256	if (SvOK(pos) && (p = SvPV(pos,len)) && len == sizeof(Fpos_t)) {
	257	RETVAL = PerlIO_setpos(handle, (Fpos_t*)p);
	258	}
	259	else {
	260	RETVAL = -1;
	261	errno = EINVAL;
	262	}
	263	#else
766a733e	264	RETVAL = PerlIO_setpos(handle, pos);
35a60386	265	#endif
2a0cf753	266	#else
766a733e NIS	267	char *p;
	268	STRLEN len;
	269	if ((p = SvPV(pos,len)) && len == sizeof(Fpos_t)) {
	270	RETVAL = fsetpos(handle, (Fpos_t*)p);
	271	}
	272	else {
	273	RETVAL = -1;
	274	errno = EINVAL;
	275	}
2a0cf753	276	#endif
766a733e	277	}
8add82fc	278	else {
	279	RETVAL = -1;
	280	errno = EINVAL;
	281	}
8add82fc	282	OUTPUT:
	283	RETVAL
	284
	285	MODULE = IO PACKAGE = IO::File PREFIX = f
	286
8063af02	287	void
8add82fc	288	new_tmpfile(packname = "IO::File")
3e946625	289	const char * packname
a375a877 GB	290	PREINIT:
	291	OutputStream fp;
	292	GV *gv;
8add82fc	293	CODE:
2a0cf753	294	#ifdef PerlIO
a375a877	295	fp = PerlIO_tmpfile();
2a0cf753	296	#else
a375a877	297	fp = tmpfile();
2a0cf753	298	#endif
a375a877	299	gv = (GV*)SvREFCNT_inc(newGVgen(packname));
71cd1c3f	300	if (gv)
c33e8be1	301	(void) hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
71cd1c3f	302	if (gv && do_open(gv, "+>&", 3, FALSE, 0, 0, fp)) {
6d5cdeed	303	ST(0) = sv_2mortal(newRV((SV*)gv));
a375a877	304	sv_bless(ST(0), gv_stashpv(packname, TRUE));
cf7fe8a2	305	SvREFCNT_dec(gv); /* undo increment in newRV() */
a375a877 GB	306	}
a375a877 GB	307	else {
a1ea39dc	308	ST(0) = &PL_sv_undef;
a375a877 GB	309	SvREFCNT_dec(gv);
a375a877 GB	310	}
8add82fc	311
cf7fe8a2 GS	312	MODULE = IO PACKAGE = IO::Poll
cf7fe8a2 GS	313
766a733e	314	void
cf7fe8a2 GS	315	_poll(timeout,...)
	316	int timeout;
	317	PPCODE:
	318	{
	319	#ifdef HAS_POLL
7698c435	320	const int nfd = (items - 1) / 2;
6de2dd46	321	SV tmpsv = sv_2mortal(NEWSV(999,nfd sizeof(struct pollfd)));
908febd9 DIM	322	/* We should pass _some_ valid pointer even if nfd is zero, but it
	323	* doesn't matter what it is, since we're telling it to not check any fds.
	324	*/
	325	struct pollfd fds = nfd ? (struct pollfd )SvPVX(tmpsv) : (struct pollfd *)tmpsv;
cf7fe8a2 GS	326	int i,j,ret;
	327	for(i=1, j=0 ; j < nfd ; j++) {
	328	fds[j].fd = SvIV(ST(i));
	329	i++;
7c436af3	330	fds[j].events = (short)SvIV(ST(i));
cf7fe8a2 GS	331	i++;
	332	fds[j].revents = 0;
	333	}
	334	if((ret = poll(fds,nfd,timeout)) >= 0) {
	335	for(i=1, j=0 ; j < nfd ; j++) {
	336	sv_setiv(ST(i), fds[j].fd); i++;
	337	sv_setiv(ST(i), fds[j].revents); i++;
	338	}
	339	}
cf7fe8a2 GS	340	XSRETURN_IV(ret);
	341	#else
	342	not_here("IO::Poll::poll");
	343	#endif
	344	}
	345
	346	MODULE = IO PACKAGE = IO::Handle PREFIX = io_
	347
	348	void
	349	io_blocking(handle,blk=-1)
	350	InputStream handle
	351	int blk
	352	PROTOTYPE: $;$
	353	CODE:
	354	{
7698c435	355	const int ret = io_blocking(aTHX_ handle, items == 1 ? -1 : blk ? 1 : 0);
cf7fe8a2 GS	356	if(ret >= 0)
	357	XSRETURN_IV(ret);
	358	else
	359	XSRETURN_UNDEF;
	360	}
	361
8add82fc	362	MODULE = IO PACKAGE = IO::Handle PREFIX = f
8add82fc	363
8add82fc	364	int
	365	ungetc(handle, c)
	366	InputStream handle
10e621bc	367	SV * c
8add82fc	368	CODE:
10e621bc	369	if (handle) {
2a0cf753	370	#ifdef PerlIO
10e621bc CH	371	UV v;
	372
	373	if ((SvIOK_notUV(c) && SvIV(c) < 0) \|\| (SvNOK(c) && SvNV(c) < 0.0))
	374	croak("Negative character number in ungetc()");
	375
	376	v = SvUV(c);
6f2d5cbc	377	if (UVCHR_IS_INVARIANT(v) \|\| (v <= 0xFF && !PerlIO_isutf8(handle)))
10e621bc CH	378	RETVAL = PerlIO_ungetc(handle, (int)v);
	379	else {
	380	U8 buf[UTF8_MAXBYTES + 1], *end;
	381	Size_t len;
	382
	383	if (!PerlIO_isutf8(handle))
	384	croak("Wide character number in ungetc()");
	385
	386	/* This doesn't warn for non-chars, surrogate, and
	387	* above-Unicodes */
	388	end = uvchr_to_utf8_flags(buf, v, 0);
	389	len = end - buf;
13142853	390	if ((Size_t)PerlIO_unread(handle, &buf, len) == len)
10e621bc CH	391	XSRETURN_UV(v);
	392	else
	393	RETVAL = EOF;
	394	}
2a0cf753	395	#else
10e621bc	396	RETVAL = ungetc((int)SvIV(c), handle);
2a0cf753	397	#endif
10e621bc	398	}
8add82fc	399	else {
	400	RETVAL = -1;
	401	errno = EINVAL;
	402	}
	403	OUTPUT:
	404	RETVAL
	405
	406	int
	407	ferror(handle)
	408	InputStream handle
	409	CODE:
	410	if (handle)
2a0cf753	411	#ifdef PerlIO
760ac839	412	RETVAL = PerlIO_error(handle);
2a0cf753	413	#else
	414	RETVAL = ferror(handle);
	415	#endif
	416	else {
	417	RETVAL = -1;
	418	errno = EINVAL;
	419	}
	420	OUTPUT:
	421	RETVAL
	422
	423	int
	424	clearerr(handle)
	425	InputStream handle
	426	CODE:
	427	if (handle) {
	428	#ifdef PerlIO
	429	PerlIO_clearerr(handle);
	430	#else
	431	clearerr(handle);
	432	#endif
	433	RETVAL = 0;
	434	}
8add82fc	435	else {
8add82fc	436	RETVAL = -1;
59629a13 RR	437	errno = EINVAL;
	438	}
	439	OUTPUT:
	440	RETVAL
	441
	442	int
	443	untaint(handle)
	444	SV * handle
	445	CODE:
7a4c00b4	446	#ifdef IOf_UNTAINT
59629a13 RR	447	IO * io;
	448	io = sv_2io(handle);
	449	if (io) {
	450	IoFLAGS(io) \|= IOf_UNTAINT;
	451	RETVAL = 0;
	452	}
	453	else {
7a4c00b4	454	#endif
59629a13	455	RETVAL = -1;
8add82fc	456	errno = EINVAL;
7a4c00b4	457	#ifdef IOf_UNTAINT
8add82fc	458	}
7a4c00b4	459	#endif
8add82fc	460	OUTPUT:
	461	RETVAL
	462
	463	SysRet
	464	fflush(handle)
	465	OutputStream handle
	466	CODE:
	467	if (handle)
2a0cf753	468	#ifdef PerlIO
760ac839	469	RETVAL = PerlIO_flush(handle);
2a0cf753	470	#else
	471	RETVAL = Fflush(handle);
	472	#endif
8add82fc	473	else {
	474	RETVAL = -1;
	475	errno = EINVAL;
	476	}
	477	OUTPUT:
	478	RETVAL
	479
	480	void
c46a0ec2	481	setbuf(handle, ...)
8add82fc	482	OutputStream handle
8add82fc	483	CODE:
8add82fc	484	if (handle)
760ac839	485	#ifdef PERLIO_IS_STDIO
c46a0ec2 JH	486	{
	487	char *buf = items == 2 && SvPOK(ST(1)) ?
	488	sv_grow(ST(1), BUFSIZ) : 0;
8add82fc	489	setbuf(handle, buf);
c46a0ec2	490	}
760ac839 LW	491	#else
	492	not_here("IO::Handle::setbuf");
	493	#endif
8add82fc	494
8add82fc	495	SysRet
c46a0ec2	496	setvbuf(...)
8add82fc	497	CODE:
c46a0ec2 JH	498	if (items != 4)
c46a0ec2 JH	499	Perl_croak(aTHX_ "Usage: IO::Handle::setvbuf(handle, buf, type, size)");
1eeb0f31	500	#if defined(PERLIO_IS_STDIO) && defined(_IOFBF) && defined(HAS_SETVBUF)
c46a0ec2 JH	501	{
	502	OutputStream handle = 0;
	503	char * buf = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
	504	int type;
	505	int size;
	506
	507	if (items == 4) {
	508	handle = IoOFP(sv_2io(ST(0)));
	509	buf = SvPOK(ST(1)) ? sv_grow(ST(1), SvIV(ST(3))) : 0;
	510	type = (int)SvIV(ST(2));
	511	size = (int)SvIV(ST(3));
	512	}
d924de76 IZ	513	if (!handle) /* Try input stream. */
d924de76 IZ	514	handle = IoIFP(sv_2io(ST(0)));
c46a0ec2	515	if (items == 4 && handle)
8add82fc	516	RETVAL = setvbuf(handle, buf, type, size);
	517	else {
	518	RETVAL = -1;
	519	errno = EINVAL;
	520	}
c46a0ec2	521	}
8add82fc	522	#else
61839fa9	523	RETVAL = (SysRet) not_here("IO::Handle::setvbuf");
760ac839	524	#endif
8add82fc	525	OUTPUT:
	526	RETVAL
	527
	528
cf7fe8a2	529	SysRet
2ba489e6 EM	530	fsync(arg)
	531	SV * arg
	532	PREINIT:
	533	OutputStream handle = NULL;
cf7fe8a2 GS	534	CODE:
cf7fe8a2 GS	535	#ifdef HAS_FSYNC
2ba489e6 EM	536	handle = IoOFP(sv_2io(arg));
	537	if (!handle)
	538	handle = IoIFP(sv_2io(arg));
375ed12a JH	539	if (handle) {
	540	int fd = PerlIO_fileno(handle);
	541	if (fd >= 0) {
	542	RETVAL = fsync(fd);
	543	} else {
	544	RETVAL = -1;
	545	errno = EBADF;
	546	}
	547	} else {
cf7fe8a2 GS	548	RETVAL = -1;
	549	errno = EINVAL;
	550	}
	551	#else
	552	RETVAL = (SysRet) not_here("IO::Handle::sync");
	553	#endif
	554	OUTPUT:
	555	RETVAL
	556
986a805c FC	557	SV *
986a805c FC	558	_create_getline_subs(const char *code)
986a805c FC	559	CODE:
	560	OP (io_old_ck_lineseq)(pTHX_ OP *) = PL_check[OP_LINESEQ];
	561	PL_check[OP_LINESEQ] = io_ck_lineseq;
	562	RETVAL = SvREFCNT_inc(eval_pv(code,FALSE));
	563	PL_check[OP_LINESEQ] = io_old_ck_lineseq;
	564	OUTPUT:
	565	RETVAL
	566
cf7fe8a2	567
63a347c7 JH	568	MODULE = IO PACKAGE = IO::Socket
	569
	570	SysRet
	571	sockatmark (sock)
	572	InputStream sock
	573	PROTOTYPE: $
	574	PREINIT:
9ae155c4	575	int fd;
63a347c7	576	CODE:
9ae155c4	577	fd = PerlIO_fileno(sock);
375ed12a JH	578	if (fd < 0) {
	579	errno = EBADF;
	580	RETVAL = -1;
9ae155c4 JH	581	}
	582	#ifdef HAS_SOCKATMARK
	583	else {
375ed12a JH	584	RETVAL = sockatmark(fd);
375ed12a JH	585	}
63a347c7	586	#else
fa9804ae	587	else {
06c912bc	588	int flag = 0;
6d087280	589	# ifdef SIOCATMARK
6e22d046	590	# if defined(NETWARE) \|\| defined(WIN32)
2c2a0333	591	if (ioctl(fd, SIOCATMARK, (char*)&flag) != 0)
f754b6e0 GS	592	# else
	593	if (ioctl(fd, SIOCATMARK, &flag) != 0)
	594	# endif
06c912bc	595	XSRETURN_UNDEF;
63a347c7	596	# else
06c912bc JH	597	not_here("IO::Socket::atmark");
	598	# endif
	599	RETVAL = flag;
	600	}
63a347c7	601	#endif
63a347c7 JH	602	OUTPUT:
	603	RETVAL
	604
cf7fe8a2 GS	605	BOOT:
	606	{
	607	HV *stash;
	608	/*
	609	* constant subs for IO::Poll
	610	*/
	611	stash = gv_stashpvn("IO::Poll", 8, TRUE);
	612	#ifdef POLLIN
	613	newCONSTSUB(stash,"POLLIN",newSViv(POLLIN));
	614	#endif
	615	#ifdef POLLPRI
	616	newCONSTSUB(stash,"POLLPRI", newSViv(POLLPRI));
	617	#endif
	618	#ifdef POLLOUT
	619	newCONSTSUB(stash,"POLLOUT", newSViv(POLLOUT));
	620	#endif
	621	#ifdef POLLRDNORM
	622	newCONSTSUB(stash,"POLLRDNORM", newSViv(POLLRDNORM));
	623	#endif
	624	#ifdef POLLWRNORM
	625	newCONSTSUB(stash,"POLLWRNORM", newSViv(POLLWRNORM));
	626	#endif
	627	#ifdef POLLRDBAND
	628	newCONSTSUB(stash,"POLLRDBAND", newSViv(POLLRDBAND));
	629	#endif
	630	#ifdef POLLWRBAND
	631	newCONSTSUB(stash,"POLLWRBAND", newSViv(POLLWRBAND));
	632	#endif
	633	#ifdef POLLNORM
	634	newCONSTSUB(stash,"POLLNORM", newSViv(POLLNORM));
	635	#endif
	636	#ifdef POLLERR
	637	newCONSTSUB(stash,"POLLERR", newSViv(POLLERR));
	638	#endif
	639	#ifdef POLLHUP
	640	newCONSTSUB(stash,"POLLHUP", newSViv(POLLHUP));
	641	#endif
	642	#ifdef POLLNVAL
	643	newCONSTSUB(stash,"POLLNVAL", newSViv(POLLNVAL));
	644	#endif
	645	/*
	646	* constant subs for IO::Handle
	647	*/
	648	stash = gv_stashpvn("IO::Handle", 10, TRUE);
	649	#ifdef _IOFBF
	650	newCONSTSUB(stash,"_IOFBF", newSViv(_IOFBF));
	651	#endif
	652	#ifdef _IOLBF
	653	newCONSTSUB(stash,"_IOLBF", newSViv(_IOLBF));
	654	#endif
	655	#ifdef _IONBF
	656	newCONSTSUB(stash,"_IONBF", newSViv(_IONBF));
	657	#endif
	658	#ifdef SEEK_SET
	659	newCONSTSUB(stash,"SEEK_SET", newSViv(SEEK_SET));
	660	#endif
	661	#ifdef SEEK_CUR
	662	newCONSTSUB(stash,"SEEK_CUR", newSViv(SEEK_CUR));
	663	#endif
	664	#ifdef SEEK_END
	665	newCONSTSUB(stash,"SEEK_END", newSViv(SEEK_END));
	666	#endif
cf7fe8a2	667	}
63a347c7	668