sysseek() instead of seek().

[p5sagit/p5-mst-13.2.git] / perlio.c

diff --git a/perlio.c b/perlio.c
index 0ca7a7a..7f2d66f 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -28,6 +28,20 @@
 #define PERL_IN_PERLIO_C
 #include "perl.h"
 
+#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"))
+  {
+   return 0;
+  } 
+ Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl",names);
+ /* NOTREACHED */
+ return -1; 
+}
+#endif
+
 #if !defined(PERL_IMPLICIT_SYS)
 
 #ifdef PERLIO_IS_STDIO
@@ -232,7 +246,7 @@ XS(XS_perlio_unimport)
 }
 
 SV *
-PerlIO_find_layer(char *name, STRLEN len)
+PerlIO_find_layer(const char *name, STRLEN len)
 {
  dTHX;
  SV **svp;
@@ -313,7 +327,7 @@ XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
  for (i=2; i < items; i++)
   {
    STRLEN len;
-   char *name = SvPV(ST(i),len);
+   const char *name = SvPV(ST(i),len);
    SV *layer  = PerlIO_find_layer(name,len);
    if (layer)
     {
@@ -348,7 +362,7 @@ PerlIO_default_layer(I32 n)
  int len;
  if (!PerlIO_layer_hv)
   {
-   char *s  = PerlEnv_getenv("PERLIO");
+   const char *s  = PerlEnv_getenv("PERLIO");
    newXS("perlio::import",XS_perlio_import,__FILE__);
    newXS("perlio::unimport",XS_perlio_unimport,__FILE__);
 #if 0
@@ -359,6 +373,7 @@ PerlIO_default_layer(I32 n)
    PerlIO_define_layer(&PerlIO_unix);
    PerlIO_define_layer(&PerlIO_perlio);
    PerlIO_define_layer(&PerlIO_stdio);
+   PerlIO_define_layer(&PerlIO_crlf);
 #ifdef HAS_MMAP
    PerlIO_define_layer(&PerlIO_mmap);
 #endif
@@ -371,10 +386,12 @@ PerlIO_default_layer(I32 n)
         s++;
        if (*s)
         {
-         char *e = s;
+         const char *e = s;
          SV *layer;
          while (*e && !isSPACE((unsigned char)*e))
           e++;
+         if (*s == ':')
+          s++;
          layer = PerlIO_find_layer(s,e-s);
          if (layer)
           {
@@ -412,6 +429,46 @@ PerlIO_default_layer(I32 n)
  return tab;
 }
 
+int
+PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
+{
+ if (names)
+  {
+   const char *s = names;
+   while (*s)
+    {
+     while (isSPACE(*s))
+      s++;
+     if (*s == ':')
+      s++;
+     if (*s)
+      {
+       const char *e = s;
+       while (*e && *e != ':' && !isSPACE(*e))
+        e++;
+       if (e > s)
+        {
+         SV *layer = PerlIO_find_layer(s,e-s);
+         if (layer)
+          {
+           PerlIO_funcs *tab = INT2PTR(PerlIO_funcs *, SvIV(SvRV(layer)));
+           if (tab)
+            {
+             PerlIO *new = PerlIO_push(f,tab,mode);
+             if (!new)
+              return -1;
+            }
+          }
+         else
+          Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",(e-s),s);
+        }
+       s = e;
+      }
+    }
+  }
+ return 0;
+}
+
 #define PerlIO_default_top() PerlIO_default_layer(-1)
 #define PerlIO_default_btm() PerlIO_default_layer(0)
 
@@ -1797,6 +1854,40 @@ PerlIO_funcs PerlIO_perlio = {
  PerlIOBuf_set_ptrcnt,
 };
 
+/*--------------------------------------------------------------------------------------*/
+/* crlf - translation currently just a copy of perlio to prove
+   that extra buffering which real one will do is not an issue.
+ */
+
+PerlIO_funcs PerlIO_crlf = {
+ "crlf",
+ sizeof(PerlIOBuf),
+ 0,
+ PerlIOBase_fileno,
+ PerlIOBuf_fdopen,
+ PerlIOBuf_open,
+ PerlIOBuf_reopen,
+ PerlIOBase_pushed,
+ PerlIOBase_noop_ok,
+ PerlIOBuf_read,
+ PerlIOBuf_unread,
+ PerlIOBuf_write,
+ PerlIOBuf_seek,
+ PerlIOBuf_tell,
+ PerlIOBuf_close,
+ PerlIOBuf_flush,
+ PerlIOBuf_fill,
+ PerlIOBase_eof,
+ PerlIOBase_error,
+ PerlIOBase_clearerr,
+ PerlIOBuf_setlinebuf,
+ PerlIOBuf_get_base,
+ PerlIOBuf_bufsiz,
+ PerlIOBuf_get_ptr,
+ PerlIOBuf_get_cnt,
+ PerlIOBuf_set_ptrcnt,
+};
+
 #ifdef HAS_MMAP
 /*--------------------------------------------------------------------------------------*/
 /* mmap as "buffer" layer */