#define PERL_IN_PERLIO_C
#include "perl.h"
+#include "XSUB.h"
+
#undef PerlMemShared_calloc
#define PerlMemShared_calloc(x,y) calloc(x,y)
#undef PerlMemShared_free
return 0;
# else
dTHX;
+ #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
int
PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
{
+#ifdef USE_SFIO
+ return 1;
+#else
return perlsio_binmode(fp,iotype,mode);
+#endif
}
/* De-mux PerlIO_openn() into fdopen, freopen and fopen type entries */
return NULL;
}
+XS(XS_PerlIO__Layer__find)
+{
+ dXSARGS;
+ if (items < 2)
+ Perl_croak(aTHX_ "Usage class->find(name[,load])");
+ else
+ {
+ char *name = SvPV_nolen(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
sfset(sfstdout,SF_SHARE,0);
}
+PerlIO *
+PerlIO_importFILE(FILE *stdio, int fl)
+{
+ int fd = fileno(stdio);
+ PerlIO *r = PerlIO_fdopen(fd,"r+");
+ return r;
+}
+
+FILE *
+PerlIO_findFILE(PerlIO *pio)
+{
+ int fd = PerlIO_fileno(pio);
+ FILE *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 <sys/mman.h>
#endif
-#include "XSUB.h"
void PerlIO_debug(const char *fmt,...) __attribute__((format(__printf__,1,2)));
}
}
-HV *PerlIO_layer_hv;
-AV *PerlIO_layer_av;
+PerlIO_list_t *PerlIO_known_layers;
+PerlIO_list_t *PerlIO_def_layerlist;
+
+PerlIO_list_t *
+PerlIO_list_alloc(void)
+{
+ PerlIO_list_t *list;
+ Newz('L',list,1,PerlIO_list_t);
+ list->refcnt = 1;
+ return list;
+}
void
-PerlIO_cleanup_layers(pTHXo_ void *data)
+PerlIO_list_free(PerlIO_list_t *list)
{
- PerlIO_layer_hv = Nullhv;
- PerlIO_layer_av = Nullav;
+ if (list)
+ {
+ if (--list->refcnt == 0)
+ {
+ if (list->array)
+ {
+ dTHX;
+ 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(PerlIO_list_t *list,PerlIO_funcs *funcs,SV *arg)
+{
+ dTHX;
+ PerlIO_pair_t *p;
+ if (list->cur >= list->len)
+ {
+ list->len += 8;
+ if (list->array)
+ Renew(list->array,list->len,PerlIO_pair_t);
+ else
+ New('l',list->array,list->len,PerlIO_pair_t);
+ }
+ p = &(list->array[list->cur++]);
+ p->funcs = funcs;
+ if ((p->arg = arg)) {
+ SvREFCNT_inc(arg);
+ }
+}
+
+
+void
+PerlIO_cleanup_layers(pTHX_ void *data)
+{
+#if 0
+ PerlIO_known_layers = Nullhv;
+ PerlIO_def_layerlist = Nullav;
+#endif
}
void
{
PerlIO_debug("PerlIO_pop f=%p %s\n",f,l->tab->name);
if (l->tab->Popped)
- (*l->tab->Popped)(f);
- *f = l->next;
+ {
+ /* 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)(f) != 0)
+ return;
+ }
+ *f = l->next;;
PerlMemShared_free(l);
}
}
/*--------------------------------------------------------------------------------------*/
/* XS Interface for perl code */
-SV *
+PerlIO_funcs *
PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
{
- SV **svp;
- SV *sv;
+ IV i;
if ((SSize_t) len <= 0)
len = strlen(name);
- svp = hv_fetch(PerlIO_layer_hv,name,len,0);
- if (!svp && load && PL_subname && PerlIO_layer_av && av_len(PerlIO_layer_av)+1 >= 2)
+ for (i=0; i < PerlIO_known_layers->cur; i++)
+ {
+ PerlIO_funcs *f = PerlIO_known_layers->array[i].funcs;
+ if (memEQ(f->name,name,len))
+ {
+ PerlIO_debug("%.*s => %p\n",(int)len,name,f);
+ return f;
+ }
+ }
+ if (load && PL_subname && PerlIO_def_layerlist && PerlIO_def_layerlist->cur >= 2)
{
SV *pkgsv = newSVpvn("PerlIO",6);
SV *layer = newSVpvn(name,len);
/* The two SVs are magically freed by load_module */
Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
LEAVE;
- /* Say this is lvalue so we get an 'undef' if still not there */
- svp = hv_fetch(PerlIO_layer_hv,name,len,1);
- }
- if (svp && (sv = *svp))
- {
- if (SvROK(sv))
- return *svp;
+ return PerlIO_find_layer(aTHX_ name,len,0);
}
- return Nullsv;
+ PerlIO_debug("Cannot find %.*s\n",(int)len,name);
+ return NULL;
}
#ifdef USE_ATTRIBUTES_FOR_PERLIO
return sv;
}
-void
-PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
+XS(XS_PerlIO__Layer__find)
{
- if (!PerlIO_layer_hv)
+ dXSARGS;
+ if (items < 2)
+ Perl_croak(aTHX_ "Usage class->find(name[,load])");
+ else
{
- PerlIO_layer_hv = get_hv("open::layers",GV_ADD|GV_ADDMULTI);
+ STRLEN len = 0;
+ char *name = SvPV(ST(1),len);
+ bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
+ PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
+ ST(0) = (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) : &PL_sv_undef;
+ XSRETURN(1);
}
- hv_store(PerlIO_layer_hv,tab->name,strlen(tab->name),PerlIO_tab_sv(aTHX_ tab),0);
+}
+
+void
+PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
+{
+ if (!PerlIO_known_layers)
+ PerlIO_known_layers = PerlIO_list_alloc();
+ PerlIO_list_push(PerlIO_known_layers,tab,Nullsv);
PerlIO_debug("define %s %p\n",tab->name,tab);
}
int
-PerlIO_parse_layers(pTHX_ AV *av, const char *names)
+PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
{
if (names)
{
}
if (e > s)
{
- SV *layer = PerlIO_find_layer(aTHX_ s,llen,1);
+ PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ s,llen,1);
if (layer)
{
- av_push(av,SvREFCNT_inc(layer));
- av_push(av,(as) ? newSVpvn(as,alen) : &PL_sv_undef);
+ PerlIO_list_push(av, layer, (as) ? newSVpvn(as,alen) : &PL_sv_undef);
}
else {
Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",(int)llen,s);
}
void
-PerlIO_default_buffer(pTHX_ AV *av)
+PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
{
PerlIO_funcs *tab = &PerlIO_perlio;
if (O_BINARY != O_TEXT)
}
}
PerlIO_debug("Pushing %s\n",tab->name);
- av_push(av,SvREFCNT_inc(PerlIO_find_layer(aTHX_ tab->name,0,0)));
- av_push(av,&PL_sv_undef);
+ PerlIO_list_push(av,PerlIO_find_layer(aTHX_ tab->name,0,0),&PL_sv_undef);
}
SV *
-PerlIO_arg_fetch(pTHX_ AV *av,IV n)
+PerlIO_arg_fetch(PerlIO_list_t *av,IV n)
{
- SV **svp = av_fetch(av,n,FALSE);
- return (svp) ? *svp : Nullsv;
+ return av->array[n].arg;
}
PerlIO_funcs *
-PerlIO_layer_fetch(pTHX_ AV *av,IV n,PerlIO_funcs *def)
+PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av,IV n,PerlIO_funcs *def)
{
- SV **svp = av_fetch(av,n,FALSE);
- SV *layer;
- if (svp && (layer = *svp) && SvROK(layer) && SvIOK((layer = SvRV(layer))))
+ if (n >= 0 && n < av->cur)
{
- /* PerlIO_debug("Layer %d is %s\n",n/2,tab->name); */
- return INT2PTR(PerlIO_funcs *, SvIV(layer));
+ 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;
}
-AV *
+PerlIO_list_t *
PerlIO_default_layers(pTHX)
{
- IV len;
- if (!PerlIO_layer_av)
+ if (!PerlIO_def_layerlist)
{
const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
- PerlIO_layer_av = get_av("open::layers",GV_ADD|GV_ADDMULTI);
-
-#ifdef USE_ATTRIBUTES_FOR_PERLIO
- newXS("io::MODIFY_SCALAR_ATTRIBUTES",XS_io_MODIFY_SCALAR_ATTRIBUTES,__FILE__);
+ PerlIO_funcs *osLayer = &PerlIO_unix;
+ PerlIO_def_layerlist = PerlIO_list_alloc();
+ PerlIO_define_layer(aTHX_ &PerlIO_unix);
+#if defined(WIN32) && !defined(UNDER_CE)
+ PerlIO_define_layer(aTHX_ &PerlIO_win32);
+#if 0
+ osLayer = &PerlIO_win32;
+#endif
#endif
-
PerlIO_define_layer(aTHX_ &PerlIO_raw);
- PerlIO_define_layer(aTHX_ &PerlIO_unix);
PerlIO_define_layer(aTHX_ &PerlIO_perlio);
PerlIO_define_layer(aTHX_ &PerlIO_stdio);
PerlIO_define_layer(aTHX_ &PerlIO_crlf);
#endif
PerlIO_define_layer(aTHX_ &PerlIO_utf8);
PerlIO_define_layer(aTHX_ &PerlIO_byte);
- av_push(PerlIO_layer_av,SvREFCNT_inc(PerlIO_find_layer(aTHX_ PerlIO_unix.name,0,0)));
- av_push(PerlIO_layer_av,&PL_sv_undef);
+ PerlIO_list_push(PerlIO_def_layerlist,PerlIO_find_layer(aTHX_ osLayer->name,0,0),&PL_sv_undef);
if (s)
{
- PerlIO_parse_layers(aTHX_ PerlIO_layer_av,s);
+ PerlIO_parse_layers(aTHX_ PerlIO_def_layerlist,s);
}
else
{
- PerlIO_default_buffer(aTHX_ PerlIO_layer_av);
+ PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
}
}
- len = av_len(PerlIO_layer_av)+1;
- if (len < 2)
+ if (PerlIO_def_layerlist->cur < 2)
{
- PerlIO_default_buffer(aTHX_ PerlIO_layer_av);
- len = av_len(PerlIO_layer_av);
+ PerlIO_default_buffer(aTHX_ PerlIO_def_layerlist);
}
- return PerlIO_layer_av;
+ return PerlIO_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__);
+}
PerlIO_funcs *
PerlIO_default_layer(pTHX_ I32 n)
{
- AV *av = PerlIO_default_layers(aTHX);
- n *= 2;
+ PerlIO_list_t *av = PerlIO_default_layers(aTHX);
if (n < 0)
- n += av_len(PerlIO_layer_av)+1;
+ n += av->cur;
return PerlIO_layer_fetch(aTHX_ av,n, &PerlIO_stdio);
}
}
int
-PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode, AV *layers, IV n)
+PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode, PerlIO_list_t *layers, IV n)
{
- IV max = av_len(layers)+1;
+ IV max = layers->cur;
int code = 0;
while (n < max)
{
break;
}
}
- n += 2;
+ n++;
}
return code;
}
int code = 0;
if (names)
{
- AV *layers = newAV();
+ PerlIO_list_t *layers = PerlIO_list_alloc();
code = PerlIO_parse_layers(aTHX_ layers,names);
if (code == 0)
{
code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
}
- SvREFCNT_dec((SV *) layers);
+ PerlIO_list_free(layers);
}
return code;
}
if (!names && (O_TEXT != O_BINARY && (mode & O_BINARY)))
{
PerlIO *top = f;
- PerlIOl *l;
- while ((l = *top))
+ while (*top)
{
if (PerlIOBase(top)->tab == &PerlIO_crlf)
{
return type;
}
-static SV *
+static PerlIO_funcs *
PerlIO_layer_from_ref(pTHX_ SV *sv)
{
/* For any scalar type load the handler which is bundled with perl */
case SVt_PVGV:
return PerlIO_find_layer(aTHX_ "Glob",4, 0);
}
- return Nullsv;
+ return NULL;
}
-AV *
+PerlIO_list_t *
PerlIO_resolve_layers(pTHX_ const char *layers,const char *mode,int narg, SV **args)
{
- AV *def = PerlIO_default_layers(aTHX);
+ PerlIO_list_t *def = PerlIO_default_layers(aTHX);
int incdef = 1;
if (!_perlio)
PerlIO_stdstreams(aTHX);
/* If it is a reference but not an object see if we have a handler for it */
if (SvROK(arg) && !sv_isobject(arg))
{
- SV *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
+ PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
if (handler)
{
- def = newAV();
- av_push(def,SvREFCNT_inc(handler));
- av_push(def,&PL_sv_undef);
+ def = PerlIO_list_alloc();
+ PerlIO_list_push(def,handler,&PL_sv_undef);
incdef = 0;
}
/* Don't fail if handler cannot be found
layers = PerlIO_context_layers(aTHX_ mode);
if (layers && *layers)
{
- AV *av;
+ PerlIO_list_t *av;
if (incdef)
{
- IV n = av_len(def)+1;
- av = newAV();
- while (n-- > 0)
+ IV i = def->cur;
+ av = PerlIO_list_alloc();
+ for (i=0; i < def->cur; i++)
{
- SV **svp = av_fetch(def,n,0);
- av_store(av,n,(svp) ? SvREFCNT_inc(*svp) : &PL_sv_undef);
+ PerlIO_list_push(av,def->array[i].funcs,def->array[i].arg);
}
}
else
else
{
if (incdef)
- SvREFCNT_inc(def);
+ def->refcnt++;
return def;
}
}
}
else
{
- AV *layera;
+ PerlIO_list_t *layera = NULL;
IV n;
PerlIO_funcs *tab = NULL;
if (f && *f)
{
/* This is "reopen" - it is not tested as perl does not use it yet */
PerlIOl *l = *f;
- layera = newAV();
+ layera = PerlIO_list_alloc();
while (l)
{
SV *arg = (l->tab->Getarg) ? (*l->tab->Getarg)(&l) : &PL_sv_undef;
- av_unshift(layera,2);
- av_store(layera,0,PerlIO_tab_sv(aTHX_ l->tab));
- av_store(layera,1,arg);
+ PerlIO_list_push(layera,l->tab,arg);
l = *PerlIONext(&l);
}
}
{
layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
}
- n = av_len(layera)-1;
+ /* Start at "top" of layer stack */
+ n = layera->cur-1;
while (n >= 0)
{
PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera,n,NULL);
tab = t;
break;
}
- n -= 2;
+ n--;
}
if (tab)
{
+ /* Found that layer 'n' can do opens - call it */
PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
tab->name,layers,mode,fd,imode,perm,f,narg,args);
f = (*tab->Open)(aTHX_ tab, layera, n, mode,fd,imode,perm,f,narg,args);
if (f)
{
- if (n+2 < av_len(layera)+1)
+ if (n+1 < layera->cur)
{
- if (PerlIO_apply_layera(aTHX_ f, mode, layera, n+2) != 0)
+ /* More layers above the one that we used to open - apply them now */
+ if (PerlIO_apply_layera(aTHX_ f, mode, layera, n+1) != 0)
{
f = NULL;
}
}
}
}
- SvREFCNT_dec(layera);
+ PerlIO_list_free(layera);
}
return f;
}
};
PerlIO *
-PerlIORaw_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n,const char *mode, int fd, int imode, int perm, PerlIO *old, int narg, SV **args)
+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 **args)
{
PerlIO_funcs *tab = PerlIO_default_btm();
- return (*tab->Open)(aTHX_ tab,layers,n-2,mode,fd,imode,perm,old,narg,args);
+ return (*tab->Open)(aTHX_ tab,layers,n-1,mode,fd,imode,perm,old,narg,args);
}
PerlIO_funcs PerlIO_raw = {
PerlIOBase_unread(PerlIO *f, const void *vbuf, Size_t count)
{
dTHX;
+ /* Save the position as current head considers it */
Off_t old = PerlIO_tell(f);
SSize_t done;
PerlIO_push(aTHX_ f,&PerlIO_pending,"r",Nullsv);
+ PerlIOSelf(f,PerlIOBuf)->posn = old;
done = PerlIOBuf_unread(f,vbuf,count);
- PerlIOSelf(f,PerlIOBuf)->posn = old - done;
return done;
}
PerlIOUnix_oflags(const char *mode)
{
int oflags = -1;
+ if (*mode == 'I' || *mode == '#')
+ mode++;
switch(*mode)
{
case 'r':
{
PerlIOUnix *s = PerlIOSelf(f,PerlIOUnix);
s->fd = PerlIO_fileno(PerlIONext(f));
- s->oflags = PerlIOUnix_oflags(mode);
+ /* 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? */
+ s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
}
PerlIOBase(f)->flags |= PERLIO_F_OPEN;
return code;
}
PerlIO *
-PerlIOUnix_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args)
+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 **args)
{
if (f)
{
IV
PerlIOUnix_seek(PerlIO *f, Off_t offset, int whence)
{
- dSYS;
+ dSYS;
Off_t new = PerlLIO_lseek(PerlIOSelf(f,PerlIOUnix)->fd,offset,whence);
PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
return (new == (Off_t) -1) ? -1 : 0;
}
PerlIO *
-PerlIOStdio_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args)
+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 **args)
{
char tmode[8];
if (f)
}
PerlIO *
-PerlIOBuf_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args)
+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 **args)
{
if (f)
{
PerlIO *next = PerlIONext(f);
- PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n-2, PerlIOBase(next)->tab);
- next = (*tab->Open)(aTHX_ tab, layers, n-2, mode,fd,imode,perm,next,narg,args);
+ PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n-1, PerlIOBase(next)->tab);
+ next = (*tab->Open)(aTHX_ tab, layers, n-1, mode,fd,imode,perm,next,narg,args);
if (!next || (*PerlIOBase(f)->tab->Pushed)(f,mode,PerlIOArg) != 0)
{
return NULL;
}
else
{
- PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n-2, PerlIO_default_btm());
+ PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n-1, PerlIO_default_btm());
int init = 0;
if (*mode == 'I')
{
init = 1;
- mode++;
+ /* mode++; */
}
- f = (*tab->Open)(aTHX_ tab, layers, n-2, mode,fd,imode,perm,NULL,narg,args);
+ f = (*tab->Open)(aTHX_ tab, layers, n-1, mode,fd,imode,perm,NULL,narg,args);
if (f)
{
PerlIO_push(aTHX_ f,self,mode,PerlIOArg);
{
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
{
- avail = b->bufsiz;
+ /* 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)
- avail = 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);
PerlIOBuf_tell(PerlIO *f)
{
PerlIOBuf *b = PerlIOSelf(f,PerlIOBuf);
+ /* b->posn is file position where b->buf was read, or will be written */
Off_t posn = b->posn;
if (b->buf)
- posn += (b->ptr - b->buf);
+ {
+ /* If buffer is valid adjust position by amount in buffer */
+ posn += (b->ptr - b->buf);
+ }
return posn;
}
+
projects / p5sagit/p5-mst-13.2.git / blobdiff