Cleanup the sv_gets() logic for platforms with small stacks.

(I think hogging 8K of stack sounds like bad behaviour on any
platform, big stack or not.)

p4raw-id: //depot/perl@20300

diff --git a/sv.c b/sv.c
index c31ada7..1b76e02 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -6622,15 +6622,23 @@ thats_really_all_folks:
     }
    else
     {
-#ifndef EPOC
-       /*The big, slow, and stupid way */
-       STDCHAR buf[8192];
+       /*The big, slow, and stupid way. */
+
+      /* Any stack-challenged places. */
+#if defined(EPOC) || 1
+      /* EPOC: need to work around SDK features.         *
+       * On WINS: MS VC5 generates calls to _chkstk,     *
+       * if a "large" stack frame is allocated.          *
+       * gcc on MARM does not generate calls like these. */
+#   define USEHEAPINSTEADOFSTACK
+#endif
+
+#ifdef USEHEAPINSTEADOFSTACK
+       STDCHAR *buf = 0;
+       New(0, buf, 8192, STDCHAR);
+       assert(buf);
 #else
-       /* Need to work around EPOC SDK features          */
-       /* On WINS: MS VC5 generates calls to _chkstk,    */
-       /* if a `large' stack frame is allocated          */
-       /* gcc on MARM does not generate calls like these */
-       STDCHAR buf[1024];
+       STDCHAR buf[8192];
 #endif
 
 screamer2:
@@ -6679,6 +6687,10 @@ screamer2:
            if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
                goto screamer2;
        }
+
+#ifdef USEHEAPINSTEADOFSTACK
+       Safefree(buf);
+#endif
     }
 
     if (rspara) {              /* have to do this both before and after */