refactor and regularise label/statement grammar

[perl5.git] / perlio.c

diff --git a/perlio.c b/perlio.c
index 4fe4fa7..1440048 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -135,7 +135,7 @@ 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__)
+#  if defined(atarist)
     PERL_UNUSED_ARG(iotype);
     if (!fflush(fp)) {
         if (mode & O_BINARY)
@@ -614,10 +614,8 @@ PerlIO_list_free(pTHX_ PerlIO_list_t *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);
-               }
+               for (i = 0; i < list->cur; i++)
+                   SvREFCNT_dec(list->array[i].arg);
                Safefree(list->array);
            }
            Safefree(list);
@@ -809,17 +807,16 @@ PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
            SV * const layer = newSVpvn(name, len);
            CV * const cv    = get_cvs("PerlIO::Layer::NoWarnings", 0);
            ENTER;
-           SAVEINT(PL_in_load_module);
+           SAVEBOOL(PL_in_load_module);
            if (cv) {
                SAVEGENERICSV(PL_warnhook);
                PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
            }
-           PL_in_load_module++;
+           PL_in_load_module = TRUE;
            /*
             * 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);
        }
@@ -981,10 +978,9 @@ PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
                     * 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);
+                   Perl_ck_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;
                }
@@ -1018,10 +1014,9 @@ PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
                             */
                        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);
+                           Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
+                                          "Argument list not closed for PerlIO layer \"%.*s\"",
+                                          (int) (e - s), s);
                            return -1;
                        default:
                            /*
@@ -1040,13 +1035,11 @@ PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
                            arg = newSVpvn(as, alen);
                        PerlIO_list_push(aTHX_ av, layer,
                                         (arg) ? arg : &PL_sv_undef);
-                       if (arg)
-                           SvREFCNT_dec(arg);
+                       SvREFCNT_dec(arg);
                    }
                    else {
-                       if (ckWARN(WARN_LAYER))
-                           Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
-                                 (int) llen, s);
+                       Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
+                                      (int) llen, s);
                        return -1;
                    }
                }
@@ -1218,13 +1211,18 @@ 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");
+       Perl_croak( aTHX_
+           "%s (%d) does not match %s (%d)",
+           "PerlIO layer function table size", tab->fsize,
+           "size expected by this perl", sizeof(PerlIO_funcs) );
     }
     if (tab->size) {
        PerlIOl *l;
        if (tab->size < sizeof(PerlIOl)) {
-           goto mismatch;
+           Perl_croak( aTHX_
+               "%s (%d) smaller than %s (%d)",
+               "PerlIO layer instance size", tab->size,
+               "size expected by this perl", sizeof(PerlIOl) );
        }
        /* Real layer with a data area */
        if (f) {
@@ -1456,12 +1454,12 @@ PerlIO_layer_from_ref(pTHX_ SV *sv)
     /*
      * For any scalar type load the handler which is bundled with perl
      */
-    if (SvTYPE(sv) < SVt_PVAV) {
+    if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
        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\"");
+       if (!f)
+           Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
        return f;
     }
 
@@ -1566,8 +1564,7 @@ PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
                    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);
+               SvREFCNT_dec(arg);
                l = *PerlIONext(&l);
            }
        }
@@ -2272,8 +2269,7 @@ PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int 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);
+       SvREFCNT_dec(arg);
     }
     return f;
 }
@@ -2607,7 +2603,11 @@ PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
            mode++;
        else {
            imode = PerlIOUnix_oflags(mode);
+#ifdef VMS
+           perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
+#else
            perm = 0666;
+#endif
        }
        if (imode != -1) {
            const char *path = SvPV_nolen_const(*args);
@@ -4118,7 +4118,7 @@ PerlIOBuf_get_base(pTHX_ PerlIO *f)
     if (!b->buf) {
        if (!b->bufsiz)
            b->bufsiz = 4096;
-       b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
+       Newxz(b->buf,b->bufsiz, STDCHAR);
        if (!b->buf) {
            b->buf = (STDCHAR *) & b->oneword;
            b->bufsiz = sizeof(b->oneword);
@@ -5165,16 +5165,18 @@ PerlIO_tmpfile(void)
      int fd = -1;
      char tempname[] = "/tmp/PerlIO_XXXXXX";
      const char * const tmpdir = PL_tainting ? NULL : PerlEnv_getenv("TMPDIR");
-     SV * const sv = tmpdir && *tmpdir ? newSVpv(tmpdir, 0) : NULL;
+     SV * sv = NULL;
      /*
       * I have no idea how portable mkstemp() is ... NI-S
       */
-     if (sv) {
+     if (tmpdir && *tmpdir) {
         /* if TMPDIR is set and not empty, we try that first */
+        sv = newSVpv(tmpdir, 0);
         sv_catpv(sv, tempname + 4);
         fd = mkstemp(SvPVX(sv));
      }
      if (fd < 0) {
+        sv = NULL;
         /* else we try /tmp */
         fd = mkstemp(tempname);
      }
@@ -5184,8 +5186,7 @@ PerlIO_tmpfile(void)
               PerlIOBase(f)->flags |= PERLIO_F_TEMP;
          PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
      }
-     if (sv)
-        SvREFCNT_dec(sv);
+     SvREFCNT_dec(sv);
 #    else      /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
      FILE * const stdio = PerlSIO_tmpfile();
 
@@ -5231,8 +5232,7 @@ Perl_PerlIO_context_layers(pTHX_ const char *mode)
     if (!direction)
        return NULL;
 
-    layers = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
-                                     0, direction, 5, 0, 0);
+    layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
 
     assert(layers);
     return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;