/*
* perlio.c
* Copyright (c) 1996-2006, Nick Ing-Simmons
* Copyright (c) 2006, 2007, Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public License
* or the Artistic License, as specified in the README file.
*/
/*
* Hour after hour for nearly three weary days he had jogged up and down,
* over passes, and through long dales, and across many streams.
*/
/* This file contains the functions needed to implement PerlIO, which
* is Perl's private replacement for the C stdio library. This is used
* by default unless you compile with -Uuseperlio or run with
* PERLIO=:stdio (but don't do this unless you know what you're doing)
*/
/*
* If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
* at the dispatch tables, even when we do not need it for other reasons.
* Invent a dSYS macro to abstract this out
*/
#ifdef PERL_IMPLICIT_SYS
#define dSYS dTHX
#else
#define dSYS dNOOP
#endif
#define VOIDUSED 1
#ifdef PERL_MICRO
# include "uconfig.h"
#else
# ifndef USE_CROSS_COMPILE
# include "config.h"
# else
# include "xconfig.h"
# endif
#endif
#define PERLIO_NOT_STDIO 0
#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
/*
* #define PerlIO FILE
*/
#endif
/*
* This file provides those parts of PerlIO abstraction
* which are not #defined in perlio.h.
* Which these are depends on various Configure #ifdef's
*/
#include "EXTERN.h"
#define PERL_IN_PERLIO_C
#include "perl.h"
#ifdef PERL_IMPLICIT_CONTEXT
#undef dSYS
#define dSYS dTHX
#endif
#include "XSUB.h"
#ifdef __Lynx__
/* Missing proto on LynxOS */
int mkstemp(char*);
#endif
/* Call the callback or PerlIOBase, and return failure. */
#define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
if (PerlIOValid(f)) { \
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
if (tab && tab->callback) \
return (*tab->callback) args; \
else \
return PerlIOBase_ ## base args; \
} \
else \
SETERRNO(EBADF, SS_IVCHAN); \
return failure
/* Call the callback or fail, and return failure. */
#define Perl_PerlIO_or_fail(f, callback, failure, args) \
if (PerlIOValid(f)) { \
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
if (tab && tab->callback) \
return (*tab->callback) args; \
SETERRNO(EINVAL, LIB_INVARG); \
} \
else \
SETERRNO(EBADF, SS_IVCHAN); \
return failure
/* Call the callback or PerlIOBase, and be void. */
#define Perl_PerlIO_or_Base_void(f, callback, base, args) \
if (PerlIOValid(f)) { \
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
if (tab && tab->callback) \
(*tab->callback) args; \
else \
PerlIOBase_ ## base args; \
} \
else \
SETERRNO(EBADF, SS_IVCHAN)
/* Call the callback or fail, and be void. */
#define Perl_PerlIO_or_fail_void(f, callback, args) \
if (PerlIOValid(f)) { \
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
if (tab && tab->callback) \
(*tab->callback) args; \
else \
SETERRNO(EINVAL, LIB_INVARG); \
} \
else \
SETERRNO(EBADF, SS_IVCHAN)
#if defined(__osf__) && _XOPEN_SOURCE < 500
extern int fseeko(FILE *, off_t, int);
extern off_t ftello(FILE *);
#endif
#ifndef USE_SFIO
EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
int
perlsio_binmode(FILE *fp, int iotype, int mode)
{
/*
* This used to be contents of do_binmode in doio.c
*/
#ifdef DOSISH
# if defined(atarist) || defined(__MINT__)
PERL_UNUSED_ARG(iotype);
if (!fflush(fp)) {
if (mode & O_BINARY)
((FILE *) fp)->_flag |= _IOBIN;
else
((FILE *) fp)->_flag &= ~_IOBIN;
return 1;
}
return 0;
# else
dTHX;
PERL_UNUSED_ARG(iotype);
#ifdef NETWARE
if (PerlLIO_setmode(fp, mode) != -1) {
#else
if (PerlLIO_setmode(fileno(fp), mode) != -1) {
#endif
# if defined(WIN32) && defined(__BORLANDC__)
/*
* The translation mode of the stream is maintained independent
of
* the translation mode of the fd in the Borland RTL (heavy
* digging through their runtime sources reveal). User has to
set
* the mode explicitly for the stream (though they don't
document
* this anywhere). GSAR 97-5-24
*/
fseek(fp, 0L, 0);
if (mode & O_BINARY)
fp->flags |= _F_BIN;
else
fp->flags &= ~_F_BIN;
# endif
return 1;
}
else
return 0;
# endif
#else
# if defined(USEMYBINMODE)
dTHX;
# if defined(__CYGWIN__)
PERL_UNUSED_ARG(iotype);
# endif
if (my_binmode(fp, iotype, mode) != FALSE)
return 1;
else
return 0;
# else
PERL_UNUSED_ARG(fp);
PERL_UNUSED_ARG(iotype);
PERL_UNUSED_ARG(mode);
return 1;
# endif
#endif
}
#endif /* sfio */
#ifndef O_ACCMODE
#define O_ACCMODE 3 /* Assume traditional implementation */
#endif
int
PerlIO_intmode2str(int rawmode, char *mode, int *writing)
{
const int result = rawmode & O_ACCMODE;
int ix = 0;
int ptype;
switch (result) {
case O_RDONLY:
ptype = IoTYPE_RDONLY;
break;
case O_WRONLY:
ptype = IoTYPE_WRONLY;
break;
case O_RDWR:
default:
ptype = IoTYPE_RDWR;
break;
}
if (writing)
*writing = (result != O_RDONLY);
if (result == O_RDONLY) {
mode[ix++] = 'r';
}
#ifdef O_APPEND
else if (rawmode & O_APPEND) {
mode[ix++] = 'a';
if (result != O_WRONLY)
mode[ix++] = '+';
}
#endif
else {
if (result == O_WRONLY)
mode[ix++] = 'w';
else {
mode[ix++] = 'r';
mode[ix++] = '+';
}
}
if (rawmode & O_BINARY)
mode[ix++] = 'b';
mode[ix] = '\0';
return ptype;
}
#ifndef PERLIO_LAYERS
int
PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
{
if (!names || !*names
|| strEQ(names, ":crlf")
|| strEQ(names, ":raw")
|| strEQ(names, ":bytes")
) {
return 0;
}
Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
/*
* NOTREACHED
*/
return -1;
}
void
PerlIO_destruct(pTHX)
{
}
int
PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
{
#ifdef USE_SFIO
PERL_UNUSED_ARG(iotype);
PERL_UNUSED_ARG(mode);
PERL_UNUSED_ARG(names);
return 1;
#else
return perlsio_binmode(fp, iotype, mode);
#endif
}
PerlIO *
PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
{
#if defined(PERL_MICRO) || defined(__SYMBIAN32__)
return NULL;
#else
#ifdef PERL_IMPLICIT_SYS
return PerlSIO_fdupopen(f);
#else
#ifdef WIN32
return win32_fdupopen(f);
#else
if (f) {
const int fd = PerlLIO_dup(PerlIO_fileno(f));
if (fd >= 0) {
char mode[8];
#ifdef DJGPP
const int omode = djgpp_get_stream_mode(f);
#else
const int omode = fcntl(fd, F_GETFL);
#endif
PerlIO_intmode2str(omode,mode,NULL);
/* the r+ is a hack */
return PerlIO_fdopen(fd, mode);
}
return NULL;
}
else {
SETERRNO(EBADF, SS_IVCHAN);
}
#endif
return NULL;
#endif
#endif
}
/*
* De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
*/
PerlIO *
PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
int imode, int perm, PerlIO *old, int narg, SV *const*args)
{
if (narg) {
if (narg > 1) {
Perl_croak(aTHX_ "More than one argument to open");
}
if (*args == &PL_sv_undef)
return PerlIO_tmpfile();
else {
const char *name = SvPV_nolen_const(*args);
if (*mode == IoTYPE_NUMERIC) {
fd = PerlLIO_open3(name, imode, perm);
if (fd >= 0)
return PerlIO_fdopen(fd, mode + 1);
}
else if (old) {
return PerlIO_reopen(name, mode, old);
}
else {
return PerlIO_open(name, mode);
}
}
}
else {
return PerlIO_fdopen(fd, (char *) mode);
}
return NULL;
}
XS(XS_PerlIO__Layer__find)
{
dXSARGS;
if (items < 2)
Perl_croak(aTHX_ "Usage class->find(name[,load])");
else {
const char * const name = SvPV_nolen_const(ST(1));
ST(0) = (strEQ(name, "crlf")
|| strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
XSRETURN(1);
}
}
void
Perl_boot_core_PerlIO(pTHX)
{
newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
}
#endif
#ifdef PERLIO_IS_STDIO
void
PerlIO_init(pTHX)
{
PERL_UNUSED_CONTEXT;
/*
* Does nothing (yet) except force this file to be included in perl
* binary. That allows this file to force inclusion of other functions
* that may be required by loadable extensions e.g. for
* FileHandle::tmpfile
*/
}
#undef PerlIO_tmpfile
PerlIO *
PerlIO_tmpfile(void)
{
return tmpfile();
}
#else /* PERLIO_IS_STDIO */
#ifdef USE_SFIO
#undef HAS_FSETPOS
#undef HAS_FGETPOS
/*
* This section is just to make sure these functions get pulled in from
* libsfio.a
*/
#undef PerlIO_tmpfile
PerlIO *
PerlIO_tmpfile(void)
{
return sftmp(0);
}
void
PerlIO_init(pTHX)
{
PERL_UNUSED_CONTEXT;
/*
* Force this file to be included in perl binary. Which allows this
* file to force inclusion of other functions that may be required by
* loadable extensions e.g. for FileHandle::tmpfile
*/
/*
* Hack sfio does its own 'autoflush' on stdout in common cases. Flush
* results in a lot of lseek()s to regular files and lot of small
* writes to pipes.
*/
sfset(sfstdout, SF_SHARE, 0);
}
/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
PerlIO *
PerlIO_importFILE(FILE *stdio, const char *mode)
{
const int fd = fileno(stdio);
if (!mode || !*mode) {
mode = "r+";
}
return PerlIO_fdopen(fd, mode);
}
FILE *
PerlIO_findFILE(PerlIO *pio)
{
const int fd = PerlIO_fileno(pio);
FILE * const f = fdopen(fd, "r+");
PerlIO_flush(pio);
if (!f && errno == EINVAL)
f = fdopen(fd, "w");
if (!f && errno == EINVAL)
f = fdopen(fd, "r");
return f;
}
#else /* USE_SFIO */
/*======================================================================================*/
/*
* Implement all the PerlIO interface ourselves.
*/
#include "perliol.h"
/*
* We _MUST_ have <unistd.h> if we are using lseek() and may have large
* files
*/
#ifdef I_UNISTD
#include <unistd.h>
#endif
#ifdef HAS_MMAP
#include <sys/mman.h>
#endif
void
PerlIO_debug(const char *fmt, ...)
{
va_list ap;
dSYS;
va_start(ap, fmt);
if (!PL_perlio_debug_fd) {
if (PL_uid == PL_euid && PL_gid == PL_egid) {
const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
if (s && *s)
PL_perlio_debug_fd
= PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
else
PL_perlio_debug_fd = -1;
} else {
/* tainting or set*id, so ignore the environment, and ensure we
skip these tests next time through. */
PL_perlio_debug_fd = -1;
}
}
if (PL_perlio_debug_fd > 0) {
dTHX;
const char *s = SvPV_nolen_const(LocationFilename(PL_curcop->op_location));
STRLEN len;
SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
(IV) 333);
Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
s = SvPV_const(sv, len);
PerlLIO_write(PL_perlio_debug_fd, s, len);
SvREFCNT_dec(sv);
}
va_end(ap);
}
/*--------------------------------------------------------------------------------------*/
/*
* Inner level routines
*/
/*
* Table of pointers to the PerlIO structs (malloc'ed)
*/
#define PERLIO_TABLE_SIZE 64
PerlIO *
PerlIO_allocate(pTHX)
{
dVAR;
/*
* Find a free slot in the table, allocating new table as necessary
*/
PerlIO **last;
PerlIO *f;
last = &PL_perlio;
while ((f = *last)) {
int i;
last = (PerlIO **) (f);
for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
if (!*++f) {
return f;
}
}
}
Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
if (!f) {
return NULL;
}
*last = f;
return f + 1;
}
#undef PerlIO_fdupopen
PerlIO *
PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
{
if (PerlIOValid(f)) {
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
if (tab && tab->Dup)
return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
else {
return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
}
}
else
SETERRNO(EBADF, SS_IVCHAN);
return NULL;
}
void
PerlIO_cleantable(pTHX_ PerlIO **tablep)
{
PerlIO * const table = *tablep;
if (table) {
int i;
PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
PerlIO * const f = table + i;
if (*f) {
PerlIO_close(f);
}
}
Safefree(table);
*tablep = NULL;
}
}
PerlIO_list_t *
PerlIO_list_alloc(pTHX)
{
PerlIO_list_t *list;
PERL_UNUSED_CONTEXT;
Newxz(list, 1, PerlIO_list_t);
list->refcnt = 1;
return list;
}
void
PerlIO_list_free(pTHX_ PerlIO_list_t *list)
{
if (list) {
if (--list->refcnt == 0) {
if (list->array) {
IV i;
for (i = 0; i < list->cur; i++) {
if (list->array[i].arg)
SvREFCNT_dec(list->array[i].arg);
}
Safefree(list->array);
}
Safefree(list);
}
}
}
void
PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
{
dVAR;
PerlIO_pair_t *p;
PERL_UNUSED_CONTEXT;
if (list->cur >= list->len) {
list->len += 8;
if (list->array)
Renew(list->array, list->len, PerlIO_pair_t);
else
Newx(list->array, list->len, PerlIO_pair_t);
}
p = &(list->array[list->cur++]);
p->funcs = funcs;
if ((p->arg = arg)) {
SvREFCNT_inc_void_NN(arg);
}
}
PerlIO_list_t *
PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
{
PerlIO_list_t *list = NULL;
if (proto) {
int i;
list = PerlIO_list_alloc(aTHX);
for (i=0; i < proto->cur; i++) {
SV *arg = proto->array[i].arg;
#ifdef sv_dup
if (arg && param)
arg = sv_dup(arg, param);
#else
PERL_UNUSED_ARG(param);
#endif
PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
}
}
return list;
}
void
PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
{
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(proto);
PERL_UNUSED_ARG(param);
}
void
PerlIO_destruct(pTHX)
{
dVAR;
PerlIO **table = &PL_perlio;
PerlIO *f;
while ((f = *table)) {
int i;
table = (PerlIO **) (f++);
for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
PerlIO *x = f;
const PerlIOl *l;
while ((l = *x)) {
if (l->tab->kind & PERLIO_K_DESTRUCT) {
PerlIO_debug("Destruct popping %s\n", l->tab->name);
PerlIO_flush(x);
PerlIO_pop(aTHX_ x);
}
else {
x = PerlIONext(x);
}
}
f++;
}
}
}
void
PerlIO_pop(pTHX_ PerlIO *f)
{
const PerlIOl *l = *f;
if (l) {
PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
if (l->tab->Popped) {
/*
* If popped returns non-zero do not free its layer structure
* it has either done so itself, or it is shared and still in
* use
*/
if ((*l->tab->Popped) (aTHX_ f) != 0)
return;
}
*f = l->next;
Safefree(l);
}
}
/* Return as an array the stack of layers on a filehandle. Note that
* the stack is returned top-first in the array, and there are three
* times as many array elements as there are layers in the stack: the
* first element of a layer triplet is the name, the second one is the
* arguments, and the third one is the flags. */
AV *
PerlIO_get_layers(pTHX_ PerlIO *f)
{
dVAR;
AV * const av = newAV();
if (PerlIOValid(f)) {
PerlIOl *l = PerlIOBase(f);
while (l) {
/* There is some collusion in the implementation of
XS_PerlIO_get_layers - it knows that name and flags are
generated as fresh SVs here, and takes advantage of that to
"copy" them by taking a reference. If it changes here, it needs
to change there too. */
SV * const name = l->tab && l->tab->name ?
newSVpv(l->tab->name, 0) : &PL_sv_undef;
SV * const arg = l->tab && l->tab->Getarg ?
(*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
av_push(av, name);
av_push(av, arg);
av_push(av, newSViv((IV)l->flags));
l = l->next;
}
}
return av;
}
/*--------------------------------------------------------------------------------------*/
/*
* XS Interface for perl code
*/
PerlIO_funcs *
PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
{
dVAR;
IV i;
if ((SSize_t) len <= 0)
len = strlen(name);
for (i = 0; i < PL_known_layers->cur; i++) {
PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
if (memEQ(f->name, name, len) && f->name[len] == 0) {
PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
return f;
}
}
if (load && PL_subname && PL_def_layerlist
&& PL_def_layerlist->cur >= 2) {
if (PL_in_load_module) {
Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
return NULL;
} else {
SV * const pkgsv = newSVpvs("PerlIO");
SV * const layer = newSVpvn(name, len);
CV * const cv = Perl_get_cvn_flags(aTHX_ STR_WITH_LEN("PerlIO::Layer::NoWarnings"), 0);
ENTER;
SAVEINT(PL_in_load_module);
if (cv) {
SAVEGENERICSV(PL_warnhook);
PL_warnhook = (SV *) (SvREFCNT_inc_NN(cv));
}
PL_in_load_module++;
/*
* The two SVs are magically freed by load_module
*/
Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
PL_in_load_module--;
LEAVE;
return PerlIO_find_layer(aTHX_ name, len, 0);
}
}
PerlIO_debug("Cannot find %.*s\n", (int) len, name);
return NULL;
}
#ifdef USE_ATTRIBUTES_FOR_PERLIO
static int
perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
{
if (SvROK(sv)) {
IO * const io = GvIOn((GV *) SvRV(sv));
PerlIO * const ifp = IoIFP(io);
PerlIO * const ofp = IoOFP(io);
Perl_warn(aTHX_ "set %" SVf " %p %p %p",
SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
}
return 0;
}
static int
perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
{
if (SvROK(sv)) {
IO * const io = GvIOn((GV *) SvRV(sv));
PerlIO * const ifp = IoIFP(io);
PerlIO * const ofp = IoOFP(io);
Perl_warn(aTHX_ "get %" SVf " %p %p %p",
SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
}
return 0;
}
static int
perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
{
Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
return 0;
}
static int
perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
{
Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
return 0;
}
MGVTBL perlio_vtab = {
perlio_mg_get,
perlio_mg_set,
NULL, /* len */
perlio_mg_clear,
perlio_mg_free
};
XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
{
dXSARGS;
SV * const sv = SvRV(ST(1));
AV * const av = newAV();
MAGIC *mg;
int count = 0;
int i;
sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
SvRMAGICAL_off(sv);
mg = mg_find(sv, PERL_MAGIC_ext);
mg->mg_virtual = &perlio_vtab;
mg_magical(sv);
Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
for (i = 2; i < items; i++) {
STRLEN len;
const char * const name = SvPV_const(ST(i), len);
SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
if (layer) {
av_push(av, SvREFCNT_inc_NN(layer));
}
else {
ST(count) = ST(i);
count++;
}
}
SvREFCNT_dec(av);
XSRETURN(count);
}
#endif /* USE_ATTIBUTES_FOR_PERLIO */
SV *
PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
{
HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
return sv;
}
XS(XS_PerlIO__Layer__NoWarnings)
{
/* This is used as a %SIG{__WARN__} handler to supress warnings
during loading of layers.
*/
dVAR;
dXSARGS;
PERL_UNUSED_ARG(cv);
if (items)
PerlIO_debug("warning loading layer\n");
XSRETURN(0);
}
XS(XS_PerlIO__Layer__find)
{
dVAR;
dXSARGS;
PERL_UNUSED_ARG(cv);
if (items < 2)
Perl_croak(aTHX_ "Usage class->find(name[,load])");
else {
STRLEN len;
const char * const name = SvPV_const(ST(1), len);
const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
ST(0) =
(layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
&PL_sv_undef;
XSRETURN(1);
}
}
void
PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
{
dVAR;
if (!PL_known_layers)
PL_known_layers = PerlIO_list_alloc(aTHX);
PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
}
int
PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
{
dVAR;
if (names) {
const char *s = names;
while (*s) {
while (isSPACE(*s) || *s == ':')
s++;
if (*s) {
STRLEN llen = 0;
const char *e = s;
const char *as = NULL;
STRLEN alen = 0;
if (!isIDFIRST(*s)) {
/*
* Message is consistent with how attribute lists are
* passed. Even though this means "foo : : bar" is
* seen as an invalid separator character.
*/
const char q = ((*s == '\'') ? '"' : '\'');
if (ckWARN(WARN_LAYER))
Perl_warner(aTHX_ packWARN(WARN_LAYER),
"Invalid separator character %c%c%c in PerlIO layer specification %s",
q, *s, q, s);
SETERRNO(EINVAL, LIB_INVARG);
return -1;
}
do {
e++;
} while (isALNUM(*e));
llen = e - s;
if (*e == '(') {
int nesting = 1;
as = ++e;
while (nesting) {
switch (*e++) {
case ')':
if (--nesting == 0)
alen = (e - 1) - as;
break;
case '(':
++nesting;
break;
case '\\':
/*
* It's a nul terminated string, not allowed
* to \ the terminating null. Anything other
* character is passed over.
*/
if (*e++) {
break;
}
/*
* Drop through
*/
case '\0':
e--;
if (ckWARN(WARN_LAYER))
Perl_warner(aTHX_ packWARN(WARN_LAYER),
"Argument list not closed for PerlIO layer \"%.*s\"",
(int) (e - s), s);
return -1;
default:
/*
* boring.
*/
break;
}
}
}
if (e > s) {
PerlIO_funcs * const layer =
PerlIO_find_layer(aTHX_ s, llen, 1);
if (layer) {
SV *arg = NULL;
if (as)
arg = newSVpvn(as, alen);
PerlIO_list_push(aTHX_ av, layer,
(arg) ? arg : &PL_sv_undef);
if (arg)
SvREFCNT_dec(arg);
}
else {
if (ckWARN(WARN_LAYER))
Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
(int) llen, s);
return -1;
}
}
s = e;
}
}
}
return 0;
}
void
PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
{
dVAR;
PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
#ifdef PERLIO_USING_CRLF
tab = &PerlIO_crlf;
#else
if (PerlIO_stdio.Set_ptrcnt)
tab = &PerlIO_stdio;
#endif
PerlIO_debug("Pushing %s\n", tab->name);
PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
&PL_sv_undef);
}
SV *
PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
{
return av->array[n].arg;
}
PerlIO_funcs *
PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
{
if (n >= 0 && n < av->cur) {
PerlIO_debug("Layer %" IVdf " is %s\n", n,
av->array[n].funcs->name);
return av->array[n].funcs;
}
if (!def)
Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
return def;
}
IV
PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PERL_UNUSED_ARG(mode);
PERL_UNUSED_ARG(arg);
PERL_UNUSED_ARG(tab);
if (PerlIOValid(f)) {
PerlIO_flush(f);
PerlIO_pop(aTHX_ f);
return 0;
}
return -1;
}
PERLIO_FUNCS_DECL(PerlIO_remove) = {
sizeof(PerlIO_funcs),
"pop",
0,
PERLIO_K_DUMMY | PERLIO_K_UTF8,
PerlIOPop_pushed,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL, /* flush */
NULL, /* fill */
NULL,
NULL,
NULL,
NULL,
NULL, /* get_base */
NULL, /* get_bufsiz */
NULL, /* get_ptr */
NULL, /* get_cnt */
NULL, /* set_ptrcnt */
};
PerlIO_list_t *
PerlIO_default_layers(pTHX)
{
dVAR;
if (!PL_def_layerlist) {
const char * const s = PerlEnv_getenv("PERLIO");
PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
PL_def_layerlist = PerlIO_list_alloc(aTHX);
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
#if defined(WIN32)
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
#if 0
osLayer = &PerlIO_win32;
#endif
#endif
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
#ifdef HAS_MMAP
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
#endif
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
PerlIO_list_push(aTHX_ PL_def_layerlist,
PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
&PL_sv_undef);
if (s) {
PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
}
else {
PerlIO_default_buffer(aTHX_ PL_def_layerlist);
}
}
if (PL_def_layerlist->cur < 2) {
PerlIO_default_buffer(aTHX_ PL_def_layerlist);
}
return PL_def_layerlist;
}
void
Perl_boot_core_PerlIO(pTHX)
{
#ifdef USE_ATTRIBUTES_FOR_PERLIO
newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
__FILE__);
#endif
newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
}
PerlIO_funcs *
PerlIO_default_layer(pTHX_ I32 n)
{
dVAR;
PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
if (n < 0)
n += av->cur;
return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
}
#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
void
PerlIO_stdstreams(pTHX)
{
dVAR;
if (!PL_perlio) {
PerlIO_allocate(aTHX);
PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
}
}
PerlIO *
PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
{
if (tab->fsize != sizeof(PerlIO_funcs)) {
mismatch:
Perl_croak(aTHX_ "Layer does not match this perl");
}
if (tab->size) {
PerlIOl *l;
if (tab->size < sizeof(PerlIOl)) {
goto mismatch;
}
/* Real layer with a data area */
if (f) {
char *temp;
Newxz(temp, tab->size, char);
l = (PerlIOl*)temp;
if (l) {
l->next = *f;
l->tab = (PerlIO_funcs*) tab;
*f = l;
PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
(void*)f, tab->name,
(mode) ? mode : "(Null)", (void*)arg);
if (*l->tab->Pushed &&
(*l->tab->Pushed)
(aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
PerlIO_pop(aTHX_ f);
return NULL;
}
}
else
return NULL;
}
}
else if (f) {
/* Pseudo-layer where push does its own stack adjust */
PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
(mode) ? mode : "(Null)", (void*)arg);
if (tab->Pushed &&
(*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
return NULL;
}
}
return f;
}
IV
PerlIOBase_binmode(pTHX_ PerlIO *f)
{
if (PerlIOValid(f)) {
/* Is layer suitable for raw stream ? */
if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
/* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
}
else {
/* Not suitable - pop it */
PerlIO_pop(aTHX_ f);
}
return 0;
}
return -1;
}
IV
PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PERL_UNUSED_ARG(mode);
PERL_UNUSED_ARG(arg);
PERL_UNUSED_ARG(tab);
if (PerlIOValid(f)) {
PerlIO *t;
const PerlIOl *l;
PerlIO_flush(f);
/*
* Strip all layers that are not suitable for a raw stream
*/
t = f;
while (t && (l = *t)) {
if (l->tab->Binmode) {
/* Has a handler - normal case */
if ((*l->tab->Binmode)(aTHX_ f) == 0) {
if (*t == l) {
/* Layer still there - move down a layer */
t = PerlIONext(t);
}
}
else {
return -1;
}
}
else {
/* No handler - pop it */
PerlIO_pop(aTHX_ t);
}
}
if (PerlIOValid(f)) {
PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
return 0;
}
}
return -1;
}
int
PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
PerlIO_list_t *layers, IV n, IV max)
{
int code = 0;
while (n < max) {
PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
if (tab) {
if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
code = -1;
break;
}
}
n++;
}
return code;
}
int
PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
{
int code = 0;
if (f && names) {
PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
code = PerlIO_parse_layers(aTHX_ layers, names);
if (code == 0) {
code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
}
PerlIO_list_free(aTHX_ layers);
}
return code;
}
/*--------------------------------------------------------------------------------------*/
/*
* Given the abstraction above the public API functions
*/
int
PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
{
PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
(PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
iotype, mode, (names) ? names : "(Null)");
if (names) {
/* Do not flush etc. if (e.g.) switching encodings.
if a pushed layer knows it needs to flush lower layers
(for example :unix which is never going to call them)
it can do the flush when it is pushed.
*/
return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
}
else {
/* Fake 5.6 legacy of using this call to turn ON O_TEXT */
#ifdef PERLIO_USING_CRLF
/* Legacy binmode only has meaning if O_TEXT has a value distinct from
O_BINARY so we can look for it in mode.
*/
if (!(mode & O_BINARY)) {
/* Text mode */
/* FIXME?: Looking down the layer stack seems wrong,
but is a way of reaching past (say) an encoding layer
to flip CRLF-ness of the layer(s) below
*/
while (*f) {
/* Perhaps we should turn on bottom-most aware layer
e.g. Ilya's idea that UNIX TTY could serve
*/
if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
/* Not in text mode - flush any pending stuff and flip it */
PerlIO_flush(f);
PerlIOBase(f)->flags |= PERLIO_F_CRLF;
}
/* Only need to turn it on in one layer so we are done */
return TRUE;
}
f = PerlIONext(f);
}
/* Not finding a CRLF aware layer presumably means we are binary
which is not what was requested - so we failed
We _could_ push :crlf layer but so could caller
*/
return FALSE;
}
#endif
/* Legacy binmode is now _defined_ as being equivalent to pushing :raw
So code that used to be here is now in PerlIORaw_pushed().
*/
return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
}
}
int
PerlIO__close(pTHX_ PerlIO *f)
{
if (PerlIOValid(f)) {
PerlIO_funcs * const tab = PerlIOBase(f)->tab;
if (tab && tab->Close)
return (*tab->Close)(aTHX_ f);
else
return PerlIOBase_close(aTHX_ f);
}
else {
SETERRNO(EBADF, SS_IVCHAN);
return -1;
}
}
int
Perl_PerlIO_close(pTHX_ PerlIO *f)
{
const int code = PerlIO__close(aTHX_ f);
while (PerlIOValid(f)) {
PerlIO_pop(aTHX_ f);
}
return code;
}
int
Perl_PerlIO_fileno(pTHX_ PerlIO *f)
{
dVAR;
Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
}
static PerlIO_funcs *
PerlIO_layer_from_ref(pTHX_ SV *sv)
{
dVAR;
/*
* For any scalar type load the handler which is bundled with perl
*/
if (SvTYPE(sv) < SVt_PVAV) {
PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
/* This isn't supposed to happen, since PerlIO::scalar is core,
* but could happen anyway in smaller installs or with PAR */
if (!f && ckWARN(WARN_LAYER))
Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
return f;
}
/*
* For other types allow if layer is known but don't try and load it
*/
switch (SvTYPE(sv)) {
case SVt_PVAV:
return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
case SVt_PVHV:
return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
case SVt_PVCV:
return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
case SVt_PVGV:
return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
default:
return NULL;
}
}
PerlIO_list_t *
PerlIO_resolve_layers(pTHX_ const char *layers,
const char *mode, int narg, SV *const*args)
{
dVAR;
PerlIO_list_t *def = PerlIO_default_layers(aTHX);
int incdef = 1;
if (!PL_perlio)
PerlIO_stdstreams(aTHX);
if (narg) {
SV * const arg = *args;
/*
* If it is a reference but not an object see if we have a handler
* for it
*/
if (SvROK(arg) && !sv_isobject(arg)) {
PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
if (handler) {
def = PerlIO_list_alloc(aTHX);
PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
incdef = 0;
}
/*
* Don't fail if handler cannot be found :via(...) etc. may do
* something sensible else we will just stringfy and open
* resulting string.
*/
}
}
if (!layers || !*layers)
layers = Perl_PerlIO_context_layers(aTHX_ mode);
if (layers && *layers) {
PerlIO_list_t *av;
if (incdef) {
av = PerlIO_clone_list(aTHX_ def, NULL);
}
else {
av = def;
}
if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
return av;
}
else {
PerlIO_list_free(aTHX_ av);
return NULL;
}
}
else {
if (incdef)
def->refcnt++;
return def;
}
}
PerlIO *
PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
int imode, int perm, PerlIO *f, int narg, SV * const *args)
{
dVAR;
if (!f && narg == 1 && *args == &PL_sv_undef) {
if ((f = PerlIO_tmpfile())) {
if (!layers || !*layers)
layers = Perl_PerlIO_context_layers(aTHX_ mode);
if (layers && *layers)
PerlIO_apply_layers(aTHX_ f, mode, layers);
}
}
else {
PerlIO_list_t *layera;
IV n;
PerlIO_funcs *tab = NULL;
if (PerlIOValid(f)) {
/*
* This is "reopen" - it is not tested as perl does not use it
* yet
*/
PerlIOl *l = *f;
layera = PerlIO_list_alloc(aTHX);
while (l) {
SV *arg = NULL;
if (l->tab->Getarg)
arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
PerlIO_list_push(aTHX_ layera, l->tab,
(arg) ? arg : &PL_sv_undef);
if (arg)
SvREFCNT_dec(arg);
l = *PerlIONext(&l);
}
}
else {
layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
if (!layera) {
return NULL;
}
}
/*
* Start at "top" of layer stack
*/
n = layera->cur - 1;
while (n >= 0) {
PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
if (t && t->Open) {
tab = t;
break;
}
n--;
}
if (tab) {
/*
* Found that layer 'n' can do opens - call it
*/
if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
}
PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
tab->name, layers ? layers : "(Null)", mode, fd,
imode, perm, (void*)f, narg, (void*)args);
if (tab->Open)
f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
f, narg, args);
else {
SETERRNO(EINVAL, LIB_INVARG);
f = NULL;
}
if (f) {
if (n + 1 < layera->cur) {
/*
* More layers above the one that we used to open -
* apply them now
*/
if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
/* If pushing layers fails close the file */
PerlIO_close(f);
f = NULL;
}
}
}
}
PerlIO_list_free(aTHX_ layera);
}
return f;
}
SSize_t
Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
{
PERL_ARGS_ASSERT_PERLIO_READ;
Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
}
SSize_t
Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
PERL_ARGS_ASSERT_PERLIO_UNREAD;
Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
}
SSize_t
Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
PERL_ARGS_ASSERT_PERLIO_WRITE;
Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
}
int
Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
{
Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
}
Off_t
Perl_PerlIO_tell(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
}
int
Perl_PerlIO_flush(pTHX_ PerlIO *f)
{
dVAR;
if (f) {
if (*f) {
const PerlIO_funcs *tab = PerlIOBase(f)->tab;
if (tab && tab->Flush)
return (*tab->Flush) (aTHX_ f);
else
return 0; /* If no Flush defined, silently succeed. */
}
else {
PerlIO_debug("Cannot flush f=%p\n", (void*)f);
SETERRNO(EBADF, SS_IVCHAN);
return -1;
}
}
else {
/*
* Is it good API design to do flush-all on NULL, a potentially
* errorneous input? Maybe some magical value (PerlIO*
* PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
* things on fflush(NULL), but should we be bound by their design
* decisions? --jhi
*/
PerlIO **table = &PL_perlio;
int code = 0;
while ((f = *table)) {
int i;
table = (PerlIO **) (f++);
for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
if (*f && PerlIO_flush(f) != 0)
code = -1;
f++;
}
}
return code;
}
}
void
PerlIOBase_flush_linebuf(pTHX)
{
dVAR;
PerlIO **table = &PL_perlio;
PerlIO *f;
while ((f = *table)) {
int i;
table = (PerlIO **) (f++);
for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
if (*f
&& (PerlIOBase(f)->
flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
== (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
PerlIO_flush(f);
f++;
}
}
}
int
Perl_PerlIO_fill(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
}
int
PerlIO_isutf8(PerlIO *f)
{
if (PerlIOValid(f))
return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
else
SETERRNO(EBADF, SS_IVCHAN);
return -1;
}
int
Perl_PerlIO_eof(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
}
int
Perl_PerlIO_error(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
}
void
Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
}
void
Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
}
int
PerlIO_has_base(PerlIO *f)
{
if (PerlIOValid(f)) {
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
if (tab)
return (tab->Get_base != NULL);
SETERRNO(EINVAL, LIB_INVARG);
}
else
SETERRNO(EBADF, SS_IVCHAN);
return 0;
}
int
PerlIO_fast_gets(PerlIO *f)
{
if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
if (tab)
return (tab->Set_ptrcnt != NULL);
SETERRNO(EINVAL, LIB_INVARG);
}
else
SETERRNO(EBADF, SS_IVCHAN);
return 0;
}
int
PerlIO_has_cntptr(PerlIO *f)
{
if (PerlIOValid(f)) {
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
if (tab)
return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
SETERRNO(EINVAL, LIB_INVARG);
}
else
SETERRNO(EBADF, SS_IVCHAN);
return 0;
}
int
PerlIO_canset_cnt(PerlIO *f)
{
if (PerlIOValid(f)) {
const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
if (tab)
return (tab->Set_ptrcnt != NULL);
SETERRNO(EINVAL, LIB_INVARG);
}
else
SETERRNO(EBADF, SS_IVCHAN);
return 0;
}
STDCHAR *
Perl_PerlIO_get_base(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
}
int
Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
}
STDCHAR *
Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
}
int
Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
{
Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
}
void
Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
{
Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
}
void
Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
{
Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
}
/*--------------------------------------------------------------------------------------*/
/*
* utf8 and raw dummy layers
*/
IV
PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(mode);
PERL_UNUSED_ARG(arg);
if (PerlIOValid(f)) {
if (tab->kind & PERLIO_K_UTF8)
PerlIOBase(f)->flags |= PERLIO_F_UTF8;
else
PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
return 0;
}
return -1;
}
PERLIO_FUNCS_DECL(PerlIO_utf8) = {
sizeof(PerlIO_funcs),
"utf8",
0,
PERLIO_K_DUMMY | PERLIO_K_UTF8,
PerlIOUtf8_pushed,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL, /* flush */
NULL, /* fill */
NULL,
NULL,
NULL,
NULL,
NULL, /* get_base */
NULL, /* get_bufsiz */
NULL, /* get_ptr */
NULL, /* get_cnt */
NULL, /* set_ptrcnt */
};
PERLIO_FUNCS_DECL(PerlIO_byte) = {
sizeof(PerlIO_funcs),
"bytes",
0,
PERLIO_K_DUMMY,
PerlIOUtf8_pushed,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL, /* flush */
NULL, /* fill */
NULL,
NULL,
NULL,
NULL,
NULL, /* get_base */
NULL, /* get_bufsiz */
NULL, /* get_ptr */
NULL, /* get_cnt */
NULL, /* set_ptrcnt */
};
PerlIO *
PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
IV n, const char *mode, int fd, int imode, int perm,
PerlIO *old, int narg, SV *const*args)
{
PerlIO_funcs * const tab = PerlIO_default_btm();
PERL_UNUSED_ARG(self);
if (tab && tab->Open)
return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
old, narg, args);
SETERRNO(EINVAL, LIB_INVARG);
return NULL;
}
PERLIO_FUNCS_DECL(PerlIO_raw) = {
sizeof(PerlIO_funcs),
"raw",
0,
PERLIO_K_DUMMY,
PerlIORaw_pushed,
PerlIOBase_popped,
PerlIORaw_open,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL, /* flush */
NULL, /* fill */
NULL,
NULL,
NULL,
NULL,
NULL, /* get_base */
NULL, /* get_bufsiz */
NULL, /* get_ptr */
NULL, /* get_cnt */
NULL, /* set_ptrcnt */
};
/*--------------------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------------------*/
/*
* "Methods" of the "base class"
*/
IV
PerlIOBase_fileno(pTHX_ PerlIO *f)
{
return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
}
char *
PerlIO_modestr(PerlIO * f, char *buf)
{
char *s = buf;
if (PerlIOValid(f)) {
const IV flags = PerlIOBase(f)->flags;
if (flags & PERLIO_F_APPEND) {
*s++ = 'a';
if (flags & PERLIO_F_CANREAD) {
*s++ = '+';
}
}
else if (flags & PERLIO_F_CANREAD) {
*s++ = 'r';
if (flags & PERLIO_F_CANWRITE)
*s++ = '+';
}
else if (flags & PERLIO_F_CANWRITE) {
*s++ = 'w';
if (flags & PERLIO_F_CANREAD) {
*s++ = '+';
}
}
#ifdef PERLIO_USING_CRLF
if (!(flags & PERLIO_F_CRLF))
*s++ = 'b';
#endif
}
*s = '\0';
return buf;
}
IV
PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PerlIOl * const l = PerlIOBase(f);
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(arg);
l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
if (tab->Set_ptrcnt != NULL)
l->flags |= PERLIO_F_FASTGETS;
if (mode) {
if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
mode++;
switch (*mode++) {
case 'r':
l->flags |= PERLIO_F_CANREAD;
break;
case 'a':
l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
break;
case 'w':
l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
break;
default:
SETERRNO(EINVAL, LIB_INVARG);
return -1;
}
while (*mode) {
switch (*mode++) {
case '+':
l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
break;
case 'b':
l->flags &= ~PERLIO_F_CRLF;
break;
case 't':
l->flags |= PERLIO_F_CRLF;
break;
default:
SETERRNO(EINVAL, LIB_INVARG);
return -1;
}
}
}
else {
if (l->next) {
l->flags |= l->next->flags &
(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
PERLIO_F_APPEND);
}
}
#if 0
PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
(void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
l->flags, PerlIO_modestr(f, temp));
#endif
return 0;
}
IV
PerlIOBase_popped(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(f);
return 0;
}
SSize_t
PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
/*
* Save the position as current head considers it
*/
const Off_t old = PerlIO_tell(f);
PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
PerlIOSelf(f, PerlIOBuf)->posn = old;
return PerlIOBuf_unread(aTHX_ f, vbuf, count);
}
SSize_t
PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
{
STDCHAR *buf = (STDCHAR *) vbuf;
if (f) {
if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
PerlIOBase(f)->flags |= PERLIO_F_ERROR;
SETERRNO(EBADF, SS_IVCHAN);
return 0;
}
while (count > 0) {
get_cnt:
{
SSize_t avail = PerlIO_get_cnt(f);
SSize_t take = 0;
if (avail > 0)
take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
if (take > 0) {
STDCHAR *ptr = PerlIO_get_ptr(f);
Copy(ptr, buf, take, STDCHAR);
PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
count -= take;
buf += take;
if (avail == 0) /* set_ptrcnt could have reset avail */
goto get_cnt;
}
if (count > 0 && avail <= 0) {
if (PerlIO_fill(f) != 0)
break;
}
}
}
return (buf - (STDCHAR *) vbuf);
}
return 0;
}
IV
PerlIOBase_noop_ok(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(f);
return 0;
}
IV
PerlIOBase_noop_fail(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(f);
return -1;
}
IV
PerlIOBase_close(pTHX_ PerlIO *f)
{
IV code = -1;
if (PerlIOValid(f)) {
PerlIO *n = PerlIONext(f);
code = PerlIO_flush(f);
PerlIOBase(f)->flags &=
~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
while (PerlIOValid(n)) {
const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
if (tab && tab->Close) {
if ((*tab->Close)(aTHX_ n) != 0)
code = -1;
break;
}
else {
PerlIOBase(n)->flags &=
~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
}
n = PerlIONext(n);
}
}
else {
SETERRNO(EBADF, SS_IVCHAN);
}
return code;
}
IV
PerlIOBase_eof(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
if (PerlIOValid(f)) {
return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
}
return 1;
}
IV
PerlIOBase_error(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
if (PerlIOValid(f)) {
return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
}
return 1;
}
void
PerlIOBase_clearerr(pTHX_ PerlIO *f)
{
if (PerlIOValid(f)) {
PerlIO * const n = PerlIONext(f);
PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
if (PerlIOValid(n))
PerlIO_clearerr(n);
}
}
void
PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
if (PerlIOValid(f)) {
PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
}
}
SV *
PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
{
if (!arg)
return NULL;
#ifdef sv_dup
if (param) {
arg = sv_dup(arg, param);
SvREFCNT_inc_void_NN(arg);
return arg;
}
else {
return newSVsv(arg);
}
#else
PERL_UNUSED_ARG(param);
return newSVsv(arg);
#endif
}
PerlIO *
PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
{
PerlIO * const nexto = PerlIONext(o);
if (PerlIOValid(nexto)) {
const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
if (tab && tab->Dup)
f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
else
f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
}
if (f) {
PerlIO_funcs * const self = PerlIOBase(o)->tab;
SV *arg = NULL;
char buf[8];
PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
self->name, (void*)f, (void*)o, (void*)param);
if (self->Getarg)
arg = (*self->Getarg)(aTHX_ o, param, flags);
f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
if (PerlIOBase(o)->flags & PERLIO_F_UTF8)
PerlIOBase(f)->flags |= PERLIO_F_UTF8;
if (arg)
SvREFCNT_dec(arg);
}
return f;
}
/* PL_perlio_fd_refcnt[] is in intrpvar.h */
/* Must be called with PL_perlio_mutex locked. */
static void
S_more_refcounted_fds(pTHX_ const int new_fd) {
dVAR;
const int old_max = PL_perlio_fd_refcnt_size;
const int new_max = 16 + (new_fd & ~15);
int *new_array;
PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
old_max, new_fd, new_max);
if (new_fd < old_max) {
return;
}
assert (new_max > new_fd);
/* Use plain realloc() since we need this memory to be really
* global and visible to all the interpreters and/or threads. */
new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
if (!new_array) {
/* Can't use PerlIO to write as it allocates memory */
PerlLIO_write(PerlIO_fileno(Perl_error_log),
PL_no_mem, strlen(PL_no_mem));
my_exit(1);
}
PL_perlio_fd_refcnt_size = new_max;
PL_perlio_fd_refcnt = new_array;
PerlIO_debug("Zeroing %p, %d\n",
(void*)(new_array + old_max),
new_max - old_max);
Zero(new_array + old_max, new_max - old_max, int);
}
void
PerlIO_init(pTHX)
{
/* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
PERL_UNUSED_CONTEXT;
}
void
PerlIOUnix_refcnt_inc(int fd)
{
dTHX;
if (fd >= 0) {
dVAR;
if (fd >= PL_perlio_fd_refcnt_size)
S_more_refcounted_fds(aTHX_ fd);
PL_perlio_fd_refcnt[fd]++;
if (PL_perlio_fd_refcnt[fd] <= 0) {
Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
fd, PL_perlio_fd_refcnt[fd]);
}
PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
fd, PL_perlio_fd_refcnt[fd]);
} else {
Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
}
}
int
PerlIOUnix_refcnt_dec(int fd)
{
dTHX;
int cnt = 0;
if (fd >= 0) {
dVAR;
if (fd >= PL_perlio_fd_refcnt_size) {
Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
fd, PL_perlio_fd_refcnt_size);
}
if (PL_perlio_fd_refcnt[fd] <= 0) {
Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
fd, PL_perlio_fd_refcnt[fd]);
}
cnt = --PL_perlio_fd_refcnt[fd];
PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
} else {
Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
}
return cnt;
}
void
PerlIO_cleanup(pTHX)
{
dVAR;
int i;
PerlIO_debug("Cleanup layers\n");
/* Raise STDIN..STDERR refcount so we don't close them */
for (i=0; i < 3; i++)
PerlIOUnix_refcnt_inc(i);
PerlIO_cleantable(aTHX_ &PL_perlio);
/* Restore STDIN..STDERR refcount */
for (i=0; i < 3; i++)
PerlIOUnix_refcnt_dec(i);
if (PL_known_layers) {
PerlIO_list_free(aTHX_ PL_known_layers);
PL_known_layers = NULL;
}
if (PL_def_layerlist) {
PerlIO_list_free(aTHX_ PL_def_layerlist);
PL_def_layerlist = NULL;
}
}
void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
{
dVAR;
#if 0
/* XXX we can't rely on an interpreter being present at this late stage,
XXX so we can't use a function like PerlLIO_write that relies on one
being present (at least in win32) :-(.
Disable for now.
*/
#ifdef DEBUGGING
{
/* By now all filehandles should have been closed, so any
* stray (non-STD-)filehandles indicate *possible* (PerlIO)
* errors. */
#define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
#define PERLIO_TEARDOWN_MESSAGE_FD 2
char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
int i;
for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
if (PL_perlio_fd_refcnt[i]) {
const STRLEN len =
my_snprintf(buf, sizeof(buf),
"PerlIO_teardown: fd %d refcnt=%d\n",
i, PL_perlio_fd_refcnt[i]);
PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
}
}
}
#endif
#endif
/* Not bothering with PL_perlio_mutex since by now
* all the interpreters are gone. */
if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
&& PL_perlio_fd_refcnt) {
free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
PL_perlio_fd_refcnt = NULL;
PL_perlio_fd_refcnt_size = 0;
}
}
/*--------------------------------------------------------------------------------------*/
/*
* Bottom-most level for UNIX-like case
*/
typedef struct {
struct _PerlIO base; /* The generic part */
int fd; /* UNIX like file descriptor */
int oflags; /* open/fcntl flags */
} PerlIOUnix;
int
PerlIOUnix_oflags(const char *mode)
{
int oflags = -1;
if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
mode++;
switch (*mode) {
case 'r':
oflags = O_RDONLY;
if (*++mode == '+') {
oflags = O_RDWR;
mode++;
}
break;
case 'w':
oflags = O_CREAT | O_TRUNC;
if (*++mode == '+') {
oflags |= O_RDWR;
mode++;
}
else
oflags |= O_WRONLY;
break;
case 'a':
oflags = O_CREAT | O_APPEND;
if (*++mode == '+') {
oflags |= O_RDWR;
mode++;
}
else
oflags |= O_WRONLY;
break;
}
if (*mode == 'b') {
oflags |= O_BINARY;
oflags &= ~O_TEXT;
mode++;
}
else if (*mode == 't') {
oflags |= O_TEXT;
oflags &= ~O_BINARY;
mode++;
}
/*
* Always open in binary mode
*/
oflags |= O_BINARY;
if (*mode || oflags == -1) {
SETERRNO(EINVAL, LIB_INVARG);
oflags = -1;
}
return oflags;
}
IV
PerlIOUnix_fileno(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
return PerlIOSelf(f, PerlIOUnix)->fd;
}
static void
PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
{
PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
#if defined(WIN32)
Stat_t st;
if (PerlLIO_fstat(fd, &st) == 0) {
if (!S_ISREG(st.st_mode)) {
PerlIO_debug("%d is not regular file\n",fd);
PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
}
else {
PerlIO_debug("%d _is_ a regular file\n",fd);
}
}
#endif
s->fd = fd;
s->oflags = imode;
PerlIOUnix_refcnt_inc(fd);
PERL_UNUSED_CONTEXT;
}
IV
PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
if (*PerlIONext(f)) {
/* We never call down so do any pending stuff now */
PerlIO_flush(PerlIONext(f));
/*
* XXX could (or should) we retrieve the oflags from the open file
* handle rather than believing the "mode" we are passed in? XXX
* Should the value on NULL mode be 0 or -1?
*/
PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
mode ? PerlIOUnix_oflags(mode) : -1);
}
PerlIOBase(f)->flags |= PERLIO_F_OPEN;
return code;
}
IV
PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
{
const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
Off_t new_loc;
PERL_UNUSED_CONTEXT;
if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
#ifdef ESPIPE
SETERRNO(ESPIPE, LIB_INVARG);
#else
SETERRNO(EINVAL, LIB_INVARG);
#endif
return -1;
}
new_loc = PerlLIO_lseek(fd, offset, whence);
if (new_loc == (Off_t) - 1)
return -1;
PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
return 0;
}
PerlIO *
PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
IV n, const char *mode, int fd, int imode,
int perm, PerlIO *f, int narg, SV *const*args)
{
if (PerlIOValid(f)) {
if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
(*PerlIOBase(f)->tab->Close)(aTHX_ f);
}
if (narg > 0) {
if (*mode == IoTYPE_NUMERIC)
mode++;
else {
imode = PerlIOUnix_oflags(mode);
perm = 0666;
}
if (imode != -1) {
const char *path = SvPV_nolen_const(*args);
fd = PerlLIO_open3(path, imode, perm);
}
}
if (fd >= 0) {
if (*mode == IoTYPE_IMPLICIT)
mode++;
if (!f) {
f = PerlIO_allocate(aTHX);
}
if (!PerlIOValid(f)) {
if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
return NULL;
}
}
PerlIOUnix_setfd(aTHX_ f, fd, imode);
PerlIOBase(f)->flags |= PERLIO_F_OPEN;
if (*mode == IoTYPE_APPEND)
PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
return f;
}
else {
if (f) {
NOOP;
/*
* FIXME: pop layers ???
*/
}
return NULL;
}
}
PerlIO *
PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
{
const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
int fd = os->fd;
if (flags & PERLIO_DUP_FD) {
fd = PerlLIO_dup(fd);
}
if (fd >= 0) {
f = PerlIOBase_dup(aTHX_ f, o, param, flags);
if (f) {
/* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
return f;
}
}
return NULL;
}
SSize_t
PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
{
dVAR;
const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
#ifdef PERLIO_STD_SPECIAL
if (fd == 0)
return PERLIO_STD_IN(fd, vbuf, count);
#endif
if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
return 0;
}
while (1) {
const SSize_t len = PerlLIO_read(fd, vbuf, count);
if (len >= 0 || errno != EINTR) {
if (len < 0) {
if (errno != EAGAIN) {
PerlIOBase(f)->flags |= PERLIO_F_ERROR;
}
}
else if (len == 0 && count != 0) {
PerlIOBase(f)->flags |= PERLIO_F_EOF;
SETERRNO(0,0);
}
return len;
}
PERL_ASYNC_CHECK();
}
/*NOTREACHED*/
}
SSize_t
PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
dVAR;
const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
#ifdef PERLIO_STD_SPECIAL
if (fd == 1 || fd == 2)
return PERLIO_STD_OUT(fd, vbuf, count);
#endif
while (1) {
const SSize_t len = PerlLIO_write(fd, vbuf, count);
if (len >= 0 || errno != EINTR) {
if (len < 0) {
if (errno != EAGAIN) {
PerlIOBase(f)->flags |= PERLIO_F_ERROR;
}
}
return len;
}
PERL_ASYNC_CHECK();
}
/*NOTREACHED*/
}
Off_t
PerlIOUnix_tell(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
}
IV
PerlIOUnix_close(pTHX_ PerlIO *f)
{
dVAR;
const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
int code = 0;
if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
if (PerlIOUnix_refcnt_dec(fd) > 0) {
PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
return 0;
}
}
else {
SETERRNO(EBADF,SS_IVCHAN);
return -1;
}
while (PerlLIO_close(fd) != 0) {
if (errno != EINTR) {
code = -1;
break;
}
PERL_ASYNC_CHECK();
}
if (code == 0) {
PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
}
return code;
}
PERLIO_FUNCS_DECL(PerlIO_unix) = {
sizeof(PerlIO_funcs),
"unix",
sizeof(PerlIOUnix),
PERLIO_K_RAW,
PerlIOUnix_pushed,
PerlIOBase_popped,
PerlIOUnix_open,
PerlIOBase_binmode, /* binmode */
NULL,
PerlIOUnix_fileno,
PerlIOUnix_dup,
PerlIOUnix_read,
PerlIOBase_unread,
PerlIOUnix_write,
PerlIOUnix_seek,
PerlIOUnix_tell,
PerlIOUnix_close,
PerlIOBase_noop_ok, /* flush */
PerlIOBase_noop_fail, /* fill */
PerlIOBase_eof,
PerlIOBase_error,
PerlIOBase_clearerr,
PerlIOBase_setlinebuf,
NULL, /* get_base */
NULL, /* get_bufsiz */
NULL, /* get_ptr */
NULL, /* get_cnt */
NULL, /* set_ptrcnt */
};
/*--------------------------------------------------------------------------------------*/
/*
* stdio as a layer
*/
#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
/* perl5.8 - This ensures the last minute VMS ungetc fix is not
broken by the last second glibc 2.3 fix
*/
#define STDIO_BUFFER_WRITABLE
#endif
typedef struct {
struct _PerlIO base;
FILE *stdio; /* The stream */
} PerlIOStdio;
IV
PerlIOStdio_fileno(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
if (PerlIOValid(f)) {
FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
if (s)
return PerlSIO_fileno(s);
}
errno = EBADF;
return -1;
}
char *
PerlIOStdio_mode(const char *mode, char *tmode)
{
char * const ret = tmode;
if (mode) {
while (*mode) {
*tmode++ = *mode++;
}
}
#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
*tmode++ = 'b';
#endif
*tmode = '\0';
return ret;
}
IV
PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PerlIO *n;
if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
if (toptab == tab) {
/* Top is already stdio - pop self (duplicate) and use original */
PerlIO_pop(aTHX_ f);
return 0;
} else {
const int fd = PerlIO_fileno(n);
char tmode[8];
FILE *stdio;
if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
mode = PerlIOStdio_mode(mode, tmode)))) {
PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
/* We never call down so do any pending stuff now */
PerlIO_flush(PerlIONext(f));
}
else {
return -1;
}
}
}
return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
}
PerlIO *
PerlIO_importFILE(FILE *stdio, const char *mode)
{
dTHX;
PerlIO *f = NULL;
if (stdio) {
PerlIOStdio *s;
if (!mode || !*mode) {
/* We need to probe to see how we can open the stream
so start with read/write and then try write and read
we dup() so that we can fclose without loosing the fd.
Note that the errno value set by a failing fdopen
varies between stdio implementations.
*/
const int fd = PerlLIO_dup(fileno(stdio));
FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
if (!f2) {
f2 = PerlSIO_fdopen(fd, (mode = "w"));
}
if (!f2) {
f2 = PerlSIO_fdopen(fd, (mode = "r"));
}
if (!f2) {
/* Don't seem to be able to open */
PerlLIO_close(fd);
return f;
}
fclose(f2);
}
if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
s = PerlIOSelf(f, PerlIOStdio);
s->stdio = stdio;
PerlIOUnix_refcnt_inc(fileno(stdio));
}
}
return f;
}
PerlIO *
PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
IV n, const char *mode, int fd, int imode,
int perm, PerlIO *f, int narg, SV *const*args)
{
char tmode[8];
if (PerlIOValid(f)) {
const char * const path = SvPV_nolen_const(*args);
PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
FILE *stdio;
PerlIOUnix_refcnt_dec(fileno(s->stdio));
stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
s->stdio);
if (!s->stdio)
return NULL;
s->stdio = stdio;
PerlIOUnix_refcnt_inc(fileno(s->stdio));
return f;
}
else {
if (narg > 0) {
const char * const path = SvPV_nolen_const(*args);
if (*mode == IoTYPE_NUMERIC) {
mode++;
fd = PerlLIO_open3(path, imode, perm);
}
else {
FILE *stdio;
bool appended = FALSE;
#ifdef __CYGWIN__
/* Cygwin wants its 'b' early. */
appended = TRUE;
mode = PerlIOStdio_mode(mode, tmode);
#endif
stdio = PerlSIO_fopen(path, mode);
if (stdio) {
if (!f) {
f = PerlIO_allocate(aTHX);
}
if (!appended)
mode = PerlIOStdio_mode(mode, tmode);
f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
if (f) {
PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
PerlIOUnix_refcnt_inc(fileno(stdio));
} else {
PerlSIO_fclose(stdio);
}
return f;
}
else {
return NULL;
}
}
}
if (fd >= 0) {
FILE *stdio = NULL;
int init = 0;
if (*mode == IoTYPE_IMPLICIT) {
init = 1;
mode++;
}
if (init) {
switch (fd) {
case 0:
stdio = PerlSIO_stdin;
break;
case 1:
stdio = PerlSIO_stdout;
break;
case 2:
stdio = PerlSIO_stderr;
break;
}
}
else {
stdio = PerlSIO_fdopen(fd, mode =
PerlIOStdio_mode(mode, tmode));
}
if (stdio) {
if (!f) {
f = PerlIO_allocate(aTHX);
}
if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
PerlIOUnix_refcnt_inc(fileno(stdio));
}
return f;
}
}
}
return NULL;
}
PerlIO *
PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
{
/* This assumes no layers underneath - which is what
happens, but is not how I remember it. NI-S 2001/10/16
*/
if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
const int fd = fileno(stdio);
char mode[8];
if (flags & PERLIO_DUP_FD) {
const int dfd = PerlLIO_dup(fileno(stdio));
if (dfd >= 0) {
stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
goto set_this;
}
else {
NOOP;
/* FIXME: To avoid messy error recovery if dup fails
re-use the existing stdio as though flag was not set
*/
}
}
stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
set_this:
PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
PerlIOUnix_refcnt_inc(fileno(stdio));
}
return f;
}
static int
PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
{
PERL_UNUSED_CONTEXT;
/* XXX this could use PerlIO_canset_fileno() and
* PerlIO_set_fileno() support from Configure
*/
# if defined(__UCLIBC__)
/* uClibc must come before glibc because it defines __GLIBC__ as well. */
f->__filedes = -1;
return 1;
# elif defined(__GLIBC__)
/* There may be a better way for GLIBC:
- libio.h defines a flag to not close() on cleanup
*/
f->_fileno = -1;
return 1;
# elif defined(__sun__)
PERL_UNUSED_ARG(f);
return 0;
# elif defined(__hpux)
f->__fileH = 0xff;
f->__fileL = 0xff;
return 1;
/* Next one ->_file seems to be a reasonable fallback, i.e. if
your platform does not have special entry try this one.
[For OSF only have confirmation for Tru64 (alpha)
but assume other OSFs will be similar.]
*/
# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
f->_file = -1;
return 1;
# elif defined(__FreeBSD__)
/* There may be a better way on FreeBSD:
- we could insert a dummy func in the _close function entry
f->_close = (int (*)(void *)) dummy_close;
*/
f->_file = -1;
return 1;
# elif defined(__OpenBSD__)
/* There may be a better way on OpenBSD:
- we could insert a dummy func in the _close function entry
f->_close = (int (*)(void *)) dummy_close;
*/
f->_file = -1;
return 1;
# elif defined(__EMX__)
/* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
f->_handle = -1;
return 1;
# elif defined(__CYGWIN__)
/* There may be a better way on CYGWIN:
- we could insert a dummy func in the _close function entry
f->_close = (int (*)(void *)) dummy_close;
*/
f->_file = -1;
return 1;
# elif defined(WIN32)
# if defined(__BORLANDC__)
f->fd = PerlLIO_dup(fileno(f));
# elif defined(UNDER_CE)
/* WIN_CE does not have access to FILE internals, it hardly has FILE
structure at all
*/
# else
f->_file = -1;
# endif
return 1;
# else
#if 0
/* Sarathy's code did this - we fall back to a dup/dup2 hack
(which isn't thread safe) instead
*/
# error "Don't know how to set FILE.fileno on your platform"
#endif
PERL_UNUSED_ARG(f);
return 0;
# endif
}
IV
PerlIOStdio_close(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
if (!stdio) {
errno = EBADF;
return -1;
}
else {
const int fd = fileno(stdio);
int invalidate = 0;
IV result = 0;
int saveerr = 0;
int dupfd = -1;
#ifdef SOCKS5_VERSION_NAME
/* Socks lib overrides close() but stdio isn't linked to
that library (though we are) - so we must call close()
on sockets on stdio's behalf.
*/
int optval;
Sock_size_t optlen = sizeof(int);
if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
invalidate = 1;
#endif
if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
invalidate = 1;
if (invalidate) {
/* For STD* handles, don't close stdio, since we shared the FILE *, too. */
if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
return 0;
if (stdio == stdout || stdio == stderr)
return PerlIO_flush(f);
/* Tricky - must fclose(stdio) to free memory but not close(fd)
Use Sarathy's trick from maint-5.6 to invalidate the
fileno slot of the FILE *
*/
result = PerlIO_flush(f);
saveerr = errno;
invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
if (!invalidate) {
dupfd = PerlLIO_dup(fd);
}
}
result = PerlSIO_fclose(stdio);
/* We treat error from stdio as success if we invalidated
errno may NOT be expected EBADF
*/
if (invalidate && result != 0) {
errno = saveerr;
result = 0;
}
#ifdef SOCKS5_VERSION_NAME
/* in SOCKS' case, let close() determine return value */
result = close(fd);
#endif
if (dupfd >= 0) {
PerlLIO_dup2(dupfd,fd);
PerlLIO_close(dupfd);
}
return result;
}
}
SSize_t
PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
{
dVAR;
FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
SSize_t got = 0;
for (;;) {
if (count == 1) {
STDCHAR *buf = (STDCHAR *) vbuf;
/*
* Perl is expecting PerlIO_getc() to fill the buffer Linux's
* stdio does not do that for fread()
*/
const int ch = PerlSIO_fgetc(s);
if (ch != EOF) {
*buf = ch;
got = 1;
}
}
else
got = PerlSIO_fread(vbuf, 1, count, s);
if (got == 0 && PerlSIO_ferror(s))
got = -1;
if (got >= 0 || errno != EINTR)
break;
PERL_ASYNC_CHECK();
SETERRNO(0,0); /* just in case */
}
return got;
}
SSize_t
PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
SSize_t unread = 0;
FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
#ifdef STDIO_BUFFER_WRITABLE
if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
STDCHAR *buf = ((STDCHAR *) vbuf) + count;
STDCHAR *base = PerlIO_get_base(f);
SSize_t cnt = PerlIO_get_cnt(f);
STDCHAR *ptr = PerlIO_get_ptr(f);
SSize_t avail = ptr - base;
if (avail > 0) {
if (avail > count) {
avail = count;
}
ptr -= avail;
Move(buf-avail,ptr,avail,STDCHAR);
count -= avail;
unread += avail;
PerlIO_set_ptrcnt(f,ptr,cnt+avail);
if (PerlSIO_feof(s) && unread >= 0)
PerlSIO_clearerr(s);
}
}
else
#endif
if (PerlIO_has_cntptr(f)) {
/* We can get pointer to buffer but not its base
Do ungetc() but check chars are ending up in the
buffer
*/
STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
STDCHAR *buf = ((STDCHAR *) vbuf) + count;
while (count > 0) {
const int ch = *--buf & 0xFF;
if (ungetc(ch,s) != ch) {
/* ungetc did not work */
break;
}
if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
/* Did not change pointer as expected */
fgetc(s); /* get char back again */
break;
}
/* It worked ! */
count--;
unread++;
}
}
if (count > 0) {
unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
}
return unread;
}
SSize_t
PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
dVAR;
SSize_t got;
for (;;) {
got = PerlSIO_fwrite(vbuf, 1, count,
PerlIOSelf(f, PerlIOStdio)->stdio);
if (got >= 0 || errno != EINTR)
break;
PERL_ASYNC_CHECK();
SETERRNO(0,0); /* just in case */
}
return got;
}
IV
PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
PERL_UNUSED_CONTEXT;
return PerlSIO_fseek(stdio, offset, whence);
}
Off_t
PerlIOStdio_tell(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
PERL_UNUSED_CONTEXT;
return PerlSIO_ftell(stdio);
}
IV
PerlIOStdio_flush(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
PERL_UNUSED_CONTEXT;
if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
return PerlSIO_fflush(stdio);
}
else {
NOOP;
#if 0
/*
* FIXME: This discards ungetc() and pre-read stuff which is not
* right if this is just a "sync" from a layer above Suspect right
* design is to do _this_ but not have layer above flush this
* layer read-to-read
*/
/*
* Not writeable - sync by attempting a seek
*/
const int err = errno;
if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
errno = err;
#endif
}
return 0;
}
IV
PerlIOStdio_eof(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
}
IV
PerlIOStdio_error(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
}
void
PerlIOStdio_clearerr(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
}
void
PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
{
PERL_UNUSED_CONTEXT;
#ifdef HAS_SETLINEBUF
PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
#else
PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
#endif
}
#ifdef FILE_base
STDCHAR *
PerlIOStdio_get_base(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
return (STDCHAR*)PerlSIO_get_base(stdio);
}
Size_t
PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
return PerlSIO_get_bufsiz(stdio);
}
#endif
#ifdef USE_STDIO_PTR
STDCHAR *
PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
return (STDCHAR*)PerlSIO_get_ptr(stdio);
}
SSize_t
PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
return PerlSIO_get_cnt(stdio);
}
void
PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
if (ptr != NULL) {
#ifdef STDIO_PTR_LVALUE
PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
#ifdef STDIO_PTR_LVAL_SETS_CNT
assert(PerlSIO_get_cnt(stdio) == (cnt));
#endif
#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
/*
* Setting ptr _does_ change cnt - we are done
*/
return;
#endif
#else /* STDIO_PTR_LVALUE */
PerlProc_abort();
#endif /* STDIO_PTR_LVALUE */
}
/*
* Now (or only) set cnt
*/
#ifdef STDIO_CNT_LVALUE
PerlSIO_set_cnt(stdio, cnt);
#else /* STDIO_CNT_LVALUE */
#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
PerlSIO_set_ptr(stdio,
PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
cnt));
#else /* STDIO_PTR_LVAL_SETS_CNT */
PerlProc_abort();
#endif /* STDIO_PTR_LVAL_SETS_CNT */
#endif /* STDIO_CNT_LVALUE */
}
#endif
IV
PerlIOStdio_fill(pTHX_ PerlIO *f)
{
FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
int c;
PERL_UNUSED_CONTEXT;
/*
* fflush()ing read-only streams can cause trouble on some stdio-s
*/
if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
if (PerlSIO_fflush(stdio) != 0)
return EOF;
}
for (;;) {
c = PerlSIO_fgetc(stdio);
if (c != EOF)
break;
if (! PerlSIO_ferror(stdio) || errno != EINTR)
return EOF;
PERL_ASYNC_CHECK();
SETERRNO(0,0);
}
#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
#ifdef STDIO_BUFFER_WRITABLE
if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
/* Fake ungetc() to the real buffer in case system's ungetc
goes elsewhere
*/
STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
SSize_t cnt = PerlSIO_get_cnt(stdio);
STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
if (ptr == base+1) {
*--ptr = (STDCHAR) c;
PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
if (PerlSIO_feof(stdio))
PerlSIO_clearerr(stdio);
return 0;
}
}
else
#endif
if (PerlIO_has_cntptr(f)) {
STDCHAR ch = c;
if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
return 0;
}
}
#endif
#if defined(VMS)
/* An ungetc()d char is handled separately from the regular
* buffer, so we stuff it in the buffer ourselves.
* Should never get called as should hit code above
*/
*(--((*stdio)->_ptr)) = (unsigned char) c;
(*stdio)->_cnt++;
#else
/* If buffer snoop scheme above fails fall back to
using ungetc().
*/
if (PerlSIO_ungetc(c, stdio) != c)
return EOF;
#endif
return 0;
}
PERLIO_FUNCS_DECL(PerlIO_stdio) = {
sizeof(PerlIO_funcs),
"stdio",
sizeof(PerlIOStdio),
PERLIO_K_BUFFERED|PERLIO_K_RAW,
PerlIOStdio_pushed,
PerlIOBase_popped,
PerlIOStdio_open,
PerlIOBase_binmode, /* binmode */
NULL,
PerlIOStdio_fileno,
PerlIOStdio_dup,
PerlIOStdio_read,
PerlIOStdio_unread,
PerlIOStdio_write,
PerlIOStdio_seek,
PerlIOStdio_tell,
PerlIOStdio_close,
PerlIOStdio_flush,
PerlIOStdio_fill,
PerlIOStdio_eof,
PerlIOStdio_error,
PerlIOStdio_clearerr,
PerlIOStdio_setlinebuf,
#ifdef FILE_base
PerlIOStdio_get_base,
PerlIOStdio_get_bufsiz,
#else
NULL,
NULL,
#endif
#ifdef USE_STDIO_PTR
PerlIOStdio_get_ptr,
PerlIOStdio_get_cnt,
# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
PerlIOStdio_set_ptrcnt,
# else
NULL,
# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
#else
NULL,
NULL,
NULL,
#endif /* USE_STDIO_PTR */
};
/* Note that calls to PerlIO_exportFILE() are reversed using
* PerlIO_releaseFILE(), not importFILE. */
FILE *
PerlIO_exportFILE(PerlIO * f, const char *mode)
{
dTHX;
FILE *stdio = NULL;
if (PerlIOValid(f)) {
char buf[8];
PerlIO_flush(f);
if (!mode || !*mode) {
mode = PerlIO_modestr(f, buf);
}
stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
if (stdio) {
PerlIOl *l = *f;
PerlIO *f2;
/* De-link any lower layers so new :stdio sticks */
*f = NULL;
if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
s->stdio = stdio;
PerlIOUnix_refcnt_inc(fileno(stdio));
/* Link previous lower layers under new one */
*PerlIONext(f) = l;
}
else {
/* restore layers list */
*f = l;
}
}
}
return stdio;
}
FILE *
PerlIO_findFILE(PerlIO *f)
{
PerlIOl *l = *f;
FILE *stdio;
while (l) {
if (l->tab == &PerlIO_stdio) {
PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
return s->stdio;
}
l = *PerlIONext(&l);
}
/* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
/* However, we're not really exporting a FILE * to someone else (who
becomes responsible for closing it, or calling PerlIO_releaseFILE())
So we need to undo its refernce count increase on the underlying file
descriptor. We have to do this, because if the loop above returns you
the FILE *, then *it* didn't increase any reference count. So there's
only one way to be consistent. */
stdio = PerlIO_exportFILE(f, NULL);
if (stdio) {
const int fd = fileno(stdio);
if (fd >= 0)
PerlIOUnix_refcnt_dec(fd);
}
return stdio;
}
/* Use this to reverse PerlIO_exportFILE calls. */
void
PerlIO_releaseFILE(PerlIO *p, FILE *f)
{
dVAR;
PerlIOl *l;
while ((l = *p)) {
if (l->tab == &PerlIO_stdio) {
PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
if (s->stdio == f) {
dTHX;
const int fd = fileno(f);
if (fd >= 0)
PerlIOUnix_refcnt_dec(fd);
PerlIO_pop(aTHX_ p);
return;
}
}
p = PerlIONext(p);
}
return;
}
/*--------------------------------------------------------------------------------------*/
/*
* perlio buffer layer
*/
IV
PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
const int fd = PerlIO_fileno(f);
if (fd >= 0 && PerlLIO_isatty(fd)) {
PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
}
if (*PerlIONext(f)) {
const Off_t posn = PerlIO_tell(PerlIONext(f));
if (posn != (Off_t) - 1) {
b->posn = posn;
}
}
return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
}
PerlIO *
PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
IV n, const char *mode, int fd, int imode, int perm,
PerlIO *f, int narg, SV *const*args)
{
if (PerlIOValid(f)) {
PerlIO *next = PerlIONext(f);
PerlIO_funcs *tab =
PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
if (tab && tab->Open)
next =
(*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
next, narg, args);
if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
return NULL;
}
}
else {
PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
int init = 0;
if (*mode == IoTYPE_IMPLICIT) {
init = 1;
/*
* mode++;
*/
}
if (tab && tab->Open)
f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
f, narg, args);
else
SETERRNO(EINVAL, LIB_INVARG);
if (f) {
if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
/*
* if push fails during open, open fails. close will pop us.
*/
PerlIO_close (f);
return NULL;
} else {
fd = PerlIO_fileno(f);
if (init && fd == 2) {
/*
* Initial stderr is unbuffered
*/
PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
}
#ifdef PERLIO_USING_CRLF
# ifdef PERLIO_IS_BINMODE_FD
if (PERLIO_IS_BINMODE_FD(fd))
PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
else
# endif
/*
* do something about failing setmode()? --jhi
*/
PerlLIO_setmode(fd, O_BINARY);
#endif
}
}
}
return f;
}
/*
* This "flush" is akin to sfio's sync in that it handles files in either
* read or write state. For write state, we put the postponed data through
* the next layers. For read state, we seek() the next layers to the
* offset given by current position in the buffer, and discard the buffer
* state (XXXX supposed to be for seek()able buffers only, but now it is done
* in any case?). Then the pass the stick further in chain.
*/
IV
PerlIOBuf_flush(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
int code = 0;
PerlIO *n = PerlIONext(f);
if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
/*
* write() the buffer
*/
const STDCHAR *buf = b->buf;
const STDCHAR *p = buf;
while (p < b->ptr) {
SSize_t count = PerlIO_write(n, p, b->ptr - p);
if (count > 0) {
p += count;
}
else if (count < 0 || PerlIO_error(n)) {
PerlIOBase(f)->flags |= PERLIO_F_ERROR;
code = -1;
break;
}
}
b->posn += (p - buf);
}
else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
STDCHAR *buf = PerlIO_get_base(f);
/*
* Note position change
*/
b->posn += (b->ptr - buf);
if (b->ptr < b->end) {
/* We did not consume all of it - try and seek downstream to
our logical position
*/
if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
/* Reload n as some layers may pop themselves on seek */
b->posn = PerlIO_tell(n = PerlIONext(f));
}
else {
/* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
data is lost for good - so return saying "ok" having undone
the position adjust
*/
b->posn -= (b->ptr - buf);
return code;
}
}
}
b->ptr = b->end = b->buf;
PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
/* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
if (PerlIOValid(n) && PerlIO_flush(n) != 0)
code = -1;
return code;
}
/* This discards the content of the buffer after b->ptr, and rereads
* the buffer from the position off in the layer downstream; here off
* is at offset corresponding to b->ptr - b->buf.
*/
IV
PerlIOBuf_fill(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
PerlIO *n = PerlIONext(f);
SSize_t avail;
/*
* Down-stream flush is defined not to loose read data so is harmless.
* we would not normally be fill'ing if there was data left in anycase.
*/
if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
return -1;
if (PerlIOBase(f)->flags & PERLIO_F_TTY)
PerlIOBase_flush_linebuf(aTHX);
if (!b->buf)
PerlIO_get_base(f); /* allocate via vtable */
assert(b->buf); /* The b->buf does get allocated via the vtable system. */
b->ptr = b->end = b->buf;
if (!PerlIOValid(n)) {
PerlIOBase(f)->flags |= PERLIO_F_EOF;
return -1;
}
if (PerlIO_fast_gets(n)) {
/*
* Layer below is also buffered. We do _NOT_ want to call its
* ->Read() because that will loop till it gets what we asked for
* which may hang on a pipe etc. Instead take anything it has to
* hand, or ask it to fill _once_.
*/
avail = PerlIO_get_cnt(n);
if (avail <= 0) {
avail = PerlIO_fill(n);
if (avail == 0)
avail = PerlIO_get_cnt(n);
else {
if (!PerlIO_error(n) && PerlIO_eof(n))
avail = 0;
}
}
if (avail > 0) {
STDCHAR *ptr = PerlIO_get_ptr(n);
const SSize_t cnt = avail;
if (avail > (SSize_t)b->bufsiz)
avail = b->bufsiz;
Copy(ptr, b->buf, avail, STDCHAR);
PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
}
}
else {
avail = PerlIO_read(n, b->ptr, b->bufsiz);
}
if (avail <= 0) {
if (avail == 0)
PerlIOBase(f)->flags |= PERLIO_F_EOF;
else
PerlIOBase(f)->flags |= PERLIO_F_ERROR;
return -1;
}
b->end = b->buf + avail;
PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
return 0;
}
SSize_t
PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
{
if (PerlIOValid(f)) {
const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (!b->ptr)
PerlIO_get_base(f);
return PerlIOBase_read(aTHX_ f, vbuf, count);
}
return 0;
}
SSize_t
PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
const STDCHAR *buf = (const STDCHAR *) vbuf + count;
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
SSize_t unread = 0;
SSize_t avail;
if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
PerlIO_flush(f);
if (!b->buf)
PerlIO_get_base(f);
if (b->buf) {
if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
/*
* Buffer is already a read buffer, we can overwrite any chars
* which have been read back to buffer start
*/
avail = (b->ptr - b->buf);
}
else {
/*
* Buffer is idle, set it up so whole buffer is available for
* unread
*/
avail = b->bufsiz;
b->end = b->buf + avail;
b->ptr = b->end;
PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
/*
* Buffer extends _back_ from where we are now
*/
b->posn -= b->bufsiz;
}
if (avail > (SSize_t) count) {
/*
* If we have space for more than count, just move count
*/
avail = count;
}
if (avail > 0) {
b->ptr -= avail;
buf -= avail;
/*
* In simple stdio-like ungetc() case chars will be already
* there
*/
if (buf != b->ptr) {
Copy(buf, b->ptr, avail, STDCHAR);
}
count -= avail;
unread += avail;
PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
}
}
if (count > 0) {
unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
}
return unread;
}
SSize_t
PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
const STDCHAR *buf = (const STDCHAR *) vbuf;
const STDCHAR *flushptr = buf;
Size_t written = 0;
if (!b->buf)
PerlIO_get_base(f);
if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
return 0;
if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
if (PerlIO_flush(f) != 0) {
return 0;
}
}
if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
flushptr = buf + count;
while (flushptr > buf && *(flushptr - 1) != '\n')
--flushptr;
}
while (count > 0) {
SSize_t avail = b->bufsiz - (b->ptr - b->buf);
if ((SSize_t) count < avail)
avail = count;
if (flushptr > buf && flushptr <= buf + avail)
avail = flushptr - buf;
PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
if (avail) {
Copy(buf, b->ptr, avail, STDCHAR);
count -= avail;
buf += avail;
written += avail;
b->ptr += avail;
if (buf == flushptr)
PerlIO_flush(f);
}
if (b->ptr >= (b->buf + b->bufsiz))
PerlIO_flush(f);
}
if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
PerlIO_flush(f);
return written;
}
IV
PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
{
IV code;
if ((code = PerlIO_flush(f)) == 0) {
PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
code = PerlIO_seek(PerlIONext(f), offset, whence);
if (code == 0) {
PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
b->posn = PerlIO_tell(PerlIONext(f));
}
}
return code;
}
Off_t
PerlIOBuf_tell(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
/*
* b->posn is file position where b->buf was read, or will be written
*/
Off_t posn = b->posn;
if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
#if 1
/* As O_APPEND files are normally shared in some sense it is better
to flush :
*/
PerlIO_flush(f);
#else
/* when file is NOT shared then this is sufficient */
PerlIO_seek(PerlIONext(f),0, SEEK_END);
#endif
posn = b->posn = PerlIO_tell(PerlIONext(f));
}
if (b->buf) {
/*
* If buffer is valid adjust position by amount in buffer
*/
posn += (b->ptr - b->buf);
}
return posn;
}
IV
PerlIOBuf_popped(pTHX_ PerlIO *f)
{
const IV code = PerlIOBase_popped(aTHX_ f);
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
Safefree(b->buf);
}
b->ptr = b->end = b->buf = NULL;
PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
return code;
}
IV
PerlIOBuf_close(pTHX_ PerlIO *f)
{
const IV code = PerlIOBase_close(aTHX_ f);
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
Safefree(b->buf);
}
b->ptr = b->end = b->buf = NULL;
PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
return code;
}
STDCHAR *
PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
{
const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (!b->buf)
PerlIO_get_base(f);
return b->ptr;
}
SSize_t
PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
{
const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (!b->buf)
PerlIO_get_base(f);
if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
return (b->end - b->ptr);
return 0;
}
STDCHAR *
PerlIOBuf_get_base(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
PERL_UNUSED_CONTEXT;
if (!b->buf) {
if (!b->bufsiz)
b->bufsiz = 4096;
b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
if (!b->buf) {
b->buf = (STDCHAR *) & b->oneword;
b->bufsiz = sizeof(b->oneword);
}
b->end = b->ptr = b->buf;
}
return b->buf;
}
Size_t
PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
{
const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (!b->buf)
PerlIO_get_base(f);
return (b->end - b->buf);
}
void
PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
#ifndef DEBUGGING
PERL_UNUSED_ARG(cnt);
#endif
if (!b->buf)
PerlIO_get_base(f);
b->ptr = ptr;
assert(PerlIO_get_cnt(f) == cnt);
assert(b->ptr >= b->buf);
PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
}
PerlIO *
PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
{
return PerlIOBase_dup(aTHX_ f, o, param, flags);
}
PERLIO_FUNCS_DECL(PerlIO_perlio) = {
sizeof(PerlIO_funcs),
"perlio",
sizeof(PerlIOBuf),
PERLIO_K_BUFFERED|PERLIO_K_RAW,
PerlIOBuf_pushed,
PerlIOBuf_popped,
PerlIOBuf_open,
PerlIOBase_binmode, /* binmode */
NULL,
PerlIOBase_fileno,
PerlIOBuf_dup,
PerlIOBuf_read,
PerlIOBuf_unread,
PerlIOBuf_write,
PerlIOBuf_seek,
PerlIOBuf_tell,
PerlIOBuf_close,
PerlIOBuf_flush,
PerlIOBuf_fill,
PerlIOBase_eof,
PerlIOBase_error,
PerlIOBase_clearerr,
PerlIOBase_setlinebuf,
PerlIOBuf_get_base,
PerlIOBuf_bufsiz,
PerlIOBuf_get_ptr,
PerlIOBuf_get_cnt,
PerlIOBuf_set_ptrcnt,
};
/*--------------------------------------------------------------------------------------*/
/*
* Temp layer to hold unread chars when cannot do it any other way
*/
IV
PerlIOPending_fill(pTHX_ PerlIO *f)
{
/*
* Should never happen
*/
PerlIO_flush(f);
return 0;
}
IV
PerlIOPending_close(pTHX_ PerlIO *f)
{
/*
* A tad tricky - flush pops us, then we close new top
*/
PerlIO_flush(f);
return PerlIO_close(f);
}
IV
PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
{
/*
* A tad tricky - flush pops us, then we seek new top
*/
PerlIO_flush(f);
return PerlIO_seek(f, offset, whence);
}
IV
PerlIOPending_flush(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
Safefree(b->buf);
b->buf = NULL;
}
PerlIO_pop(aTHX_ f);
return 0;
}
void
PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
{
if (cnt <= 0) {
PerlIO_flush(f);
}
else {
PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
}
}
IV
PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
PerlIOl * const l = PerlIOBase(f);
/*
* Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
* etc. get muddled when it changes mid-string when we auto-pop.
*/
l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
(PerlIOBase(PerlIONext(f))->
flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
return code;
}
SSize_t
PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
{
SSize_t avail = PerlIO_get_cnt(f);
SSize_t got = 0;
if ((SSize_t)count < avail)
avail = count;
if (avail > 0)
got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
if (got >= 0 && got < (SSize_t)count) {
const SSize_t more =
PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
if (more >= 0 || got == 0)
got += more;
}
return got;
}
PERLIO_FUNCS_DECL(PerlIO_pending) = {
sizeof(PerlIO_funcs),
"pending",
sizeof(PerlIOBuf),
PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
PerlIOPending_pushed,
PerlIOBuf_popped,
NULL,
PerlIOBase_binmode, /* binmode */
NULL,
PerlIOBase_fileno,
PerlIOBuf_dup,
PerlIOPending_read,
PerlIOBuf_unread,
PerlIOBuf_write,
PerlIOPending_seek,
PerlIOBuf_tell,
PerlIOPending_close,
PerlIOPending_flush,
PerlIOPending_fill,
PerlIOBase_eof,
PerlIOBase_error,
PerlIOBase_clearerr,
PerlIOBase_setlinebuf,
PerlIOBuf_get_base,
PerlIOBuf_bufsiz,
PerlIOBuf_get_ptr,
PerlIOBuf_get_cnt,
PerlIOPending_set_ptrcnt,
};
/*--------------------------------------------------------------------------------------*/
/*
* crlf - translation On read translate CR,LF to "\n" we do this by
* overriding ptr/cnt entries to hand back a line at a time and keeping a
* record of which nl we "lied" about. On write translate "\n" to CR,LF
*
* c->nl points on the first byte of CR LF pair when it is temporarily
* replaced by LF, or to the last CR of the buffer. In the former case
* the caller thinks that the buffer ends at c->nl + 1, in the latter
* that it ends at c->nl; these two cases can be distinguished by
* *c->nl. c->nl is set during _getcnt() call, and unset during
* _unread() and _flush() calls.
* It only matters for read operations.
*/
typedef struct {
PerlIOBuf base; /* PerlIOBuf stuff */
STDCHAR *nl; /* Position of crlf we "lied" about in the
* buffer */
} PerlIOCrlf;
/* Inherit the PERLIO_F_UTF8 flag from previous layer.
* Otherwise the :crlf layer would always revert back to
* raw mode.
*/
static void
S_inherit_utf8_flag(PerlIO *f)
{
PerlIO *g = PerlIONext(f);
if (PerlIOValid(g)) {
if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
PerlIOBase(f)->flags |= PERLIO_F_UTF8;
}
}
}
IV
PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
IV code;
PerlIOBase(f)->flags |= PERLIO_F_CRLF;
code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
#if 0
PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
(void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
PerlIOBase(f)->flags);
#endif
{
/* Enable the first CRLF capable layer you can find, but if none
* found, the one we just pushed is fine. This results in at
* any given moment at most one CRLF-capable layer being enabled
* in the whole layer stack. */
PerlIO *g = PerlIONext(f);
while (PerlIOValid(g)) {
PerlIOl *b = PerlIOBase(g);
if (b && b->tab == &PerlIO_crlf) {
if (!(b->flags & PERLIO_F_CRLF))
b->flags |= PERLIO_F_CRLF;
S_inherit_utf8_flag(g);
PerlIO_pop(aTHX_ f);
return code;
}
g = PerlIONext(g);
}
}
S_inherit_utf8_flag(f);
return code;
}
SSize_t
PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
*(c->nl) = 0xd;
c->nl = NULL;
}
if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
return PerlIOBuf_unread(aTHX_ f, vbuf, count);
else {
const STDCHAR *buf = (const STDCHAR *) vbuf + count;
PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
SSize_t unread = 0;
if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
PerlIO_flush(f);
if (!b->buf)
PerlIO_get_base(f);
if (b->buf) {
if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
b->end = b->ptr = b->buf + b->bufsiz;
PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
b->posn -= b->bufsiz;
}
while (count > 0 && b->ptr > b->buf) {
const int ch = *--buf;
if (ch == '\n') {
if (b->ptr - 2 >= b->buf) {
*--(b->ptr) = 0xa;
*--(b->ptr) = 0xd;
unread++;
count--;
}
else {
/* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
*--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
unread++;
count--;
}
}
else {
*--(b->ptr) = ch;
unread++;
count--;
}
}
}
return unread;
}
}
/* XXXX This code assumes that buffer size >=2, but does not check it... */
SSize_t
PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
if (!b->buf)
PerlIO_get_base(f);
if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
scan:
while (nl < b->end && *nl != 0xd)
nl++;
if (nl < b->end && *nl == 0xd) {
test:
if (nl + 1 < b->end) {
if (nl[1] == 0xa) {
*nl = '\n';
c->nl = nl;
}
else {
/*
* Not CR,LF but just CR
*/
nl++;
goto scan;
}
}
else {
/*
* Blast - found CR as last char in buffer
*/
if (b->ptr < nl) {
/*
* They may not care, defer work as long as
* possible
*/
c->nl = nl;
return (nl - b->ptr);
}
else {
int code;
b->ptr++; /* say we have read it as far as
* flush() is concerned */
b->buf++; /* Leave space in front of buffer */
/* Note as we have moved buf up flush's
posn += ptr-buf
will naturally make posn point at CR
*/
b->bufsiz--; /* Buffer is thus smaller */
code = PerlIO_fill(f); /* Fetch some more */
b->bufsiz++; /* Restore size for next time */
b->buf--; /* Point at space */
b->ptr = nl = b->buf; /* Which is what we hand
* off */
*nl = 0xd; /* Fill in the CR */
if (code == 0)
goto test; /* fill() call worked */
/*
* CR at EOF - just fall through
*/
/* Should we clear EOF though ??? */
}
}
}
}
return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
}
return 0;
}
void
PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
if (!b->buf)
PerlIO_get_base(f);
if (!ptr) {
if (c->nl) {
ptr = c->nl + 1;
if (ptr == b->end && *c->nl == 0xd) {
/* Defered CR at end of buffer case - we lied about count */
ptr--;
}
}
else {
ptr = b->end;
}
ptr -= cnt;
}
else {
NOOP;
#if 0
/*
* Test code - delete when it works ...
*/
IV flags = PerlIOBase(f)->flags;
STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
/* Defered CR at end of buffer case - we lied about count */
chk--;
}
chk -= cnt;
if (ptr != chk ) {
Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
" nl=%p e=%p for %d", (void*)ptr, (void*)chk,
flags, c->nl, b->end, cnt);
}
#endif
}
if (c->nl) {
if (ptr > c->nl) {
/*
* They have taken what we lied about
*/
*(c->nl) = 0xd;
c->nl = NULL;
ptr++;
}
}
b->ptr = ptr;
PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
}
SSize_t
PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
return PerlIOBuf_write(aTHX_ f, vbuf, count);
else {
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
const STDCHAR *buf = (const STDCHAR *) vbuf;
const STDCHAR * const ebuf = buf + count;
if (!b->buf)
PerlIO_get_base(f);
if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
return 0;
while (buf < ebuf) {
const STDCHAR * const eptr = b->buf + b->bufsiz;
PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
while (buf < ebuf && b->ptr < eptr) {
if (*buf == '\n') {
if ((b->ptr + 2) > eptr) {
/*
* Not room for both
*/
PerlIO_flush(f);
break;
}
else {
*(b->ptr)++ = 0xd; /* CR */
*(b->ptr)++ = 0xa; /* LF */
buf++;
if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
PerlIO_flush(f);
break;
}
}
}
else {
*(b->ptr)++ = *buf++;
}
if (b->ptr >= eptr) {
PerlIO_flush(f);
break;
}
}
}
if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
PerlIO_flush(f);
return (buf - (STDCHAR *) vbuf);
}
}
IV
PerlIOCrlf_flush(pTHX_ PerlIO *f)
{
PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
if (c->nl) {
*(c->nl) = 0xd;
c->nl = NULL;
}
return PerlIOBuf_flush(aTHX_ f);
}
IV
PerlIOCrlf_binmode(pTHX_ PerlIO *f)
{
if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
/* In text mode - flush any pending stuff and flip it */
PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
#ifndef PERLIO_USING_CRLF
/* CRLF is unusual case - if this is just the :crlf layer pop it */
if (PerlIOBase(f)->tab == &PerlIO_crlf) {
PerlIO_pop(aTHX_ f);
}
#endif
}
return 0;
}
PERLIO_FUNCS_DECL(PerlIO_crlf) = {
sizeof(PerlIO_funcs),
"crlf",
sizeof(PerlIOCrlf),
PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
PerlIOCrlf_pushed,
PerlIOBuf_popped, /* popped */
PerlIOBuf_open,
PerlIOCrlf_binmode, /* binmode */
NULL,
PerlIOBase_fileno,
PerlIOBuf_dup,
PerlIOBuf_read, /* generic read works with ptr/cnt lies */
PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
PerlIOBuf_seek,
PerlIOBuf_tell,
PerlIOBuf_close,
PerlIOCrlf_flush,
PerlIOBuf_fill,
PerlIOBase_eof,
PerlIOBase_error,
PerlIOBase_clearerr,
PerlIOBase_setlinebuf,
PerlIOBuf_get_base,
PerlIOBuf_bufsiz,
PerlIOBuf_get_ptr,
PerlIOCrlf_get_cnt,
PerlIOCrlf_set_ptrcnt,
};
#ifdef HAS_MMAP
/*--------------------------------------------------------------------------------------*/
/*
* mmap as "buffer" layer
*/
typedef struct {
PerlIOBuf base; /* PerlIOBuf stuff */
Mmap_t mptr; /* Mapped address */
Size_t len; /* mapped length */
STDCHAR *bbuf; /* malloced buffer if map fails */
} PerlIOMmap;
IV
PerlIOMmap_map(pTHX_ PerlIO *f)
{
dVAR;
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
const IV flags = PerlIOBase(f)->flags;
IV code = 0;
if (m->len)
abort();
if (flags & PERLIO_F_CANREAD) {
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
const int fd = PerlIO_fileno(f);
Stat_t st;
code = Fstat(fd, &st);
if (code == 0 && S_ISREG(st.st_mode)) {
SSize_t len = st.st_size - b->posn;
if (len > 0) {
Off_t posn;
if (PL_mmap_page_size <= 0)
Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
PL_mmap_page_size);
if (b->posn < 0) {
/*
* This is a hack - should never happen - open should
* have set it !
*/
b->posn = PerlIO_tell(PerlIONext(f));
}
posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
len = st.st_size - posn;
m->mptr = (Mmap_t)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
if (m->mptr && m->mptr != (Mmap_t) - 1) {
#if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
madvise(m->mptr, len, MADV_SEQUENTIAL);
#endif
#if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
madvise(m->mptr, len, MADV_WILLNEED);
#endif
PerlIOBase(f)->flags =
(flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
b->end = ((STDCHAR *) m->mptr) + len;
b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
b->ptr = b->buf;
m->len = len;
}
else {
b->buf = NULL;
}
}
else {
PerlIOBase(f)->flags =
flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
b->buf = NULL;
b->ptr = b->end = b->ptr;
code = -1;
}
}
}
return code;
}
IV
PerlIOMmap_unmap(pTHX_ PerlIO *f)
{
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
IV code = 0;
if (m->len) {
PerlIOBuf * const b = &m->base;
if (b->buf) {
/* The munmap address argument is tricky: depending on the
* standard it is either "void *" or "caddr_t" (which is
* usually "char *" (signed or unsigned). If we cast it
* to "void *", those that have it caddr_t and an uptight
* C++ compiler, will freak out. But casting it as char*
* should work. Maybe. (Using Mmap_t figured out by
* Configure doesn't always work, apparently.) */
code = munmap((char*)m->mptr, m->len);
b->buf = NULL;
m->len = 0;
m->mptr = NULL;
if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
code = -1;
}
b->ptr = b->end = b->buf;
PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
}
return code;
}
STDCHAR *
PerlIOMmap_get_base(pTHX_ PerlIO *f)
{
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
PerlIOBuf * const b = &m->base;
if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
/*
* Already have a readbuffer in progress
*/
return b->buf;
}
if (b->buf) {
/*
* We have a write buffer or flushed PerlIOBuf read buffer
*/
m->bbuf = b->buf; /* save it in case we need it again */
b->buf = NULL; /* Clear to trigger below */
}
if (!b->buf) {
PerlIOMmap_map(aTHX_ f); /* Try and map it */
if (!b->buf) {
/*
* Map did not work - recover PerlIOBuf buffer if we have one
*/
b->buf = m->bbuf;
}
}
b->ptr = b->end = b->buf;
if (b->buf)
return b->buf;
return PerlIOBuf_get_base(aTHX_ f);
}
SSize_t
PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
PerlIOBuf * const b = &m->base;
if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
PerlIO_flush(f);
if (b->ptr && (b->ptr - count) >= b->buf
&& memEQ(b->ptr - count, vbuf, count)) {
b->ptr -= count;
PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
return count;
}
if (m->len) {
/*
* Loose the unwritable mapped buffer
*/
PerlIO_flush(f);
/*
* If flush took the "buffer" see if we have one from before
*/
if (!b->buf && m->bbuf)
b->buf = m->bbuf;
if (!b->buf) {
PerlIOBuf_get_base(aTHX_ f);
m->bbuf = b->buf;
}
}
return PerlIOBuf_unread(aTHX_ f, vbuf, count);
}
SSize_t
PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
{
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
PerlIOBuf * const b = &m->base;
if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
/*
* No, or wrong sort of, buffer
*/
if (m->len) {
if (PerlIOMmap_unmap(aTHX_ f) != 0)
return 0;
}
/*
* If unmap took the "buffer" see if we have one from before
*/
if (!b->buf && m->bbuf)
b->buf = m->bbuf;
if (!b->buf) {
PerlIOBuf_get_base(aTHX_ f);
m->bbuf = b->buf;
}
}
return PerlIOBuf_write(aTHX_ f, vbuf, count);
}
IV
PerlIOMmap_flush(pTHX_ PerlIO *f)
{
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
PerlIOBuf * const b = &m->base;
IV code = PerlIOBuf_flush(aTHX_ f);
/*
* Now we are "synced" at PerlIOBuf level
*/
if (b->buf) {
if (m->len) {
/*
* Unmap the buffer
*/
if (PerlIOMmap_unmap(aTHX_ f) != 0)
code = -1;
}
else {
/*
* We seem to have a PerlIOBuf buffer which was not mapped
* remember it in case we need one later
*/
m->bbuf = b->buf;
}
}
return code;
}
IV
PerlIOMmap_fill(pTHX_ PerlIO *f)
{
PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
IV code = PerlIO_flush(f);
if (code == 0 && !b->buf) {
code = PerlIOMmap_map(aTHX_ f);
}
if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
code = PerlIOBuf_fill(aTHX_ f);
}
return code;
}
IV
PerlIOMmap_close(pTHX_ PerlIO *f)
{
PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
PerlIOBuf * const b = &m->base;
IV code = PerlIO_flush(f);
if (m->bbuf) {
b->buf = m->bbuf;
m->bbuf = NULL;
b->ptr = b->end = b->buf;
}
if (PerlIOBuf_close(aTHX_ f) != 0)
code = -1;
return code;
}
PerlIO *
PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
{
return PerlIOBase_dup(aTHX_ f, o, param, flags);
}
PERLIO_FUNCS_DECL(PerlIO_mmap) = {
sizeof(PerlIO_funcs),
"mmap",
sizeof(PerlIOMmap),
PERLIO_K_BUFFERED|PERLIO_K_RAW,
PerlIOBuf_pushed,
PerlIOBuf_popped,
PerlIOBuf_open,
PerlIOBase_binmode, /* binmode */
NULL,
PerlIOBase_fileno,
PerlIOMmap_dup,
PerlIOBuf_read,
PerlIOMmap_unread,
PerlIOMmap_write,
PerlIOBuf_seek,
PerlIOBuf_tell,
PerlIOBuf_close,
PerlIOMmap_flush,
PerlIOMmap_fill,
PerlIOBase_eof,
PerlIOBase_error,
PerlIOBase_clearerr,
PerlIOBase_setlinebuf,
PerlIOMmap_get_base,
PerlIOBuf_bufsiz,
PerlIOBuf_get_ptr,
PerlIOBuf_get_cnt,
PerlIOBuf_set_ptrcnt,
};
#endif /* HAS_MMAP */
PerlIO *
Perl_PerlIO_stdin(pTHX)
{
dVAR;
if (!PL_perlio) {
PerlIO_stdstreams(aTHX);
}
return &PL_perlio[1];
}
PerlIO *
Perl_PerlIO_stdout(pTHX)
{
dVAR;
if (!PL_perlio) {
PerlIO_stdstreams(aTHX);
}
return &PL_perlio[2];
}
PerlIO *
Perl_PerlIO_stderr(pTHX)
{
dVAR;
if (!PL_perlio) {
PerlIO_stdstreams(aTHX);
}
return &PL_perlio[3];
}
/*--------------------------------------------------------------------------------------*/
char *
PerlIO_getname(PerlIO *f, char *buf)
{
dTHX;
#ifdef VMS
char *name = NULL;
bool exported = FALSE;
FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
if (!stdio) {
stdio = PerlIO_exportFILE(f,0);
exported = TRUE;
}
if (stdio) {
name = fgetname(stdio, buf);
if (exported) PerlIO_releaseFILE(f,stdio);
}
return name;
#else
PERL_UNUSED_ARG(f);
PERL_UNUSED_ARG(buf);
Perl_croak(aTHX_ "Don't know how to get file name");
return NULL;
#endif
}
/*--------------------------------------------------------------------------------------*/
/*
* Functions which can be called on any kind of PerlIO implemented in
* terms of above
*/
#undef PerlIO_fdopen
PerlIO *
PerlIO_fdopen(int fd, const char *mode)
{
dTHX;
return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
}
#undef PerlIO_open
PerlIO *
PerlIO_open(const char *path, const char *mode)
{
dTHX;
SV *name = sv_2mortal(newSVpv(path, 0));
return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
}
#undef Perlio_reopen
PerlIO *
PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
{
dTHX;
SV *name = sv_2mortal(newSVpv(path,0));
return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
}
#undef PerlIO_getc
int
PerlIO_getc(PerlIO *f)
{
dTHX;
STDCHAR buf[1];
if ( 1 == PerlIO_read(f, buf, 1) ) {
return (unsigned char) buf[0];
}
return EOF;
}
#undef PerlIO_ungetc
int
PerlIO_ungetc(PerlIO *f, int ch)
{
dTHX;
if (ch != EOF) {
STDCHAR buf = ch;
if (PerlIO_unread(f, &buf, 1) == 1)
return ch;
}
return EOF;
}
#undef PerlIO_putc
int
PerlIO_putc(PerlIO *f, int ch)
{
dTHX;
STDCHAR buf = ch;
return PerlIO_write(f, &buf, 1);
}
#undef PerlIO_puts
int
PerlIO_puts(PerlIO *f, const char *s)
{
dTHX;
return PerlIO_write(f, s, strlen(s));
}
#undef PerlIO_rewind
void
PerlIO_rewind(PerlIO *f)
{
dTHX;
PerlIO_seek(f, (Off_t) 0, SEEK_SET);
PerlIO_clearerr(f);
}
#undef PerlIO_vprintf
int
PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
{
dTHX;
SV * sv;
const char *s;
STRLEN len;
SSize_t wrote;
#ifdef NEED_VA_COPY
va_list apc;
Perl_va_copy(ap, apc);
sv = vnewSVpvf(fmt, &apc);
#else
sv = vnewSVpvf(fmt, &ap);
#endif
s = SvPV_const(sv, len);
wrote = PerlIO_write(f, s, len);
SvREFCNT_dec(sv);
return wrote;
}
#undef PerlIO_printf
int
PerlIO_printf(PerlIO *f, const char *fmt, ...)
{
va_list ap;
int result;
va_start(ap, fmt);
result = PerlIO_vprintf(f, fmt, ap);
va_end(ap);
return result;
}
#undef PerlIO_stdoutf
int
PerlIO_stdoutf(const char *fmt, ...)
{
dTHX;
va_list ap;
int result;
va_start(ap, fmt);
result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
va_end(ap);
return result;
}
#undef PerlIO_tmpfile
PerlIO *
PerlIO_tmpfile(void)
{
dTHX;
PerlIO *f = NULL;
#ifdef WIN32
const int fd = win32_tmpfd();
if (fd >= 0)
f = PerlIO_fdopen(fd, "w+b");
#else /* WIN32 */
# if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
/*
* I have no idea how portable mkstemp() is ... NI-S
*/
const int fd = mkstemp(SvPVX_mutable(sv));
if (fd >= 0) {
f = PerlIO_fdopen(fd, "w+");
if (f)
PerlIOBase(f)->flags |= PERLIO_F_TEMP;
PerlLIO_unlink(SvPVX_const(sv));
}
SvREFCNT_dec(sv);
# else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
FILE * const stdio = PerlSIO_tmpfile();
if (stdio)
f = PerlIO_fdopen(fileno(stdio), "w+");
# endif /* else HAS_MKSTEMP */
#endif /* else WIN32 */
return f;
}
#undef HAS_FSETPOS
#undef HAS_FGETPOS
#endif /* USE_SFIO */
#endif /* PERLIO_IS_STDIO */
/*======================================================================================*/
/*
* Now some functions in terms of above which may be needed even if we are
* not in true PerlIO mode
*/
const char *
Perl_PerlIO_context_layers(pTHX_ const char *mode)
{
dVAR;
const char *direction = NULL;
SV **layers;
/*
* Need to supply default layer info from open.pm
*/
if (!PL_curcop)
return NULL;
if (mode && mode[0] != 'r') {
if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
direction = "open>";
} else {
if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
direction = "open<";
}
if (!direction)
return NULL;
layers = hv_fetch(PL_curcop->cop_hints_hash, direction, 5, 0);
assert(layers);
assert(*layers);
return SvOK(*layers) ? SvPV_nolen_const(*layers) : NULL;
}
#ifndef HAS_FSETPOS
#undef PerlIO_setpos
int
PerlIO_setpos(PerlIO *f, SV *pos)
{
dTHX;
if (SvOK(pos)) {
STRLEN len;
const Off_t * const posn = (Off_t *) SvPV(pos, len);
if (f && len == sizeof(Off_t))
return PerlIO_seek(f, *posn, SEEK_SET);
}
SETERRNO(EINVAL, SS_IVCHAN);
return -1;
}
#else
#undef PerlIO_setpos
int
PerlIO_setpos(PerlIO *f, SV *pos)
{
dTHX;
if (SvOK(pos)) {
STRLEN len;
Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
if (f && len == sizeof(Fpos_t)) {
#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
return fsetpos64(f, fpos);
#else
return fsetpos(f, fpos);
#endif
}
}
SETERRNO(EINVAL, SS_IVCHAN);
return -1;
}
#endif
#ifndef HAS_FGETPOS
#undef PerlIO_getpos
int
PerlIO_getpos(PerlIO *f, SV *pos)
{
dTHX;
Off_t posn = PerlIO_tell(f);
sv_setpvn(pos, (char *) &posn, sizeof(posn));
return (posn == (Off_t) - 1) ? -1 : 0;
}
#else
#undef PerlIO_getpos
int
PerlIO_getpos(PerlIO *f, SV *pos)
{
dTHX;
Fpos_t fpos;
int code;
#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
code = fgetpos64(f, &fpos);
#else
code = fgetpos(f, &fpos);
#endif
sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
return code;
}
#endif
#if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
int
vprintf(char *pat, char *args)
{
_doprnt(pat, args, stdout);
return 0; /* wrong, but perl doesn't use the return
* value */
}
int
vfprintf(FILE *fd, char *pat, char *args)
{
_doprnt(pat, args, fd);
return 0; /* wrong, but perl doesn't use the return
* value */
}
#endif
#ifndef PerlIO_vsprintf
int
PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
{
dTHX;
const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
PERL_UNUSED_CONTEXT;
#ifndef PERL_MY_VSNPRINTF_GUARDED
if (val < 0 || (n > 0 ? val >= n : 0)) {
Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
}
#endif
return val;
}
#endif
#ifndef PerlIO_sprintf
int
PerlIO_sprintf(char *s, int n, const char *fmt, ...)
{
va_list ap;
int result;
va_start(ap, fmt);
result = PerlIO_vsprintf(s, n, fmt, ap);
va_end(ap);
return result;
}
#endif
/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*
* ex: set ts=8 sts=4 sw=4 noet:
*/