Get Visual C++ 2005 (aka Visual C++ 8.x) support off the ground

This is not a complete fix yet by any means (there are lots of compiler
warnings and lots of test failures), but it's a step in the right
direction.

See the thread starting here:
http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2006-10/msg00893.html
and continuing here:
http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2006-11/msg00102.html
for further information

p4raw-id: //depot/perl@29218

win32/Makefile

@@ -434,6 +434,9 @@ DEFINES		= $(DEFINES) -DWIN64 -DCONSERVATIVE
 OPTIMIZE	= $(OPTIMIZE) -Wp64 -fp:precise
 !ENDIF
 
+# Use the MSVCRT read() fix if the PerlCRT was not chosen. This may be not
+# necessary with recent MSVCRT's, but we use the fix anyway in case this build
+# is going to be run on a system with an old MSVCRT.
 !IF "$(USE_PERLCRT)" != "define"
 BUILDOPT	= $(BUILDOPT) -DPERL_MSVCRT_READFIX
 !ENDIF

win32/makefile.mk

@@ -485,6 +485,7 @@ EXEOUT_FLAG	= -o
 LIBOUT_FLAG	=
 
 # NOTE: we assume that GCC uses MSVCRT.DLL
+# See comments about PERL_MSVCRT_rEADFIX in the "cl" compiler section below.
 BUILDOPT	+= -fno-strict-aliasing -DPERL_MSVCRT_READFIX
 
 .ELSE
@@ -544,6 +545,9 @@ DEFINES		+= -DWIN64 -DCONSERVATIVE
 OPTIMIZE	+= -Wp64 -fp:precise
 .ENDIF
 
+# Use the MSVCRT read() fix if the PerlCRT was not chosen. This may be not
+# necessary with recent MSVCRT's, but we use the fix anyway in case this build
+# is going to be run on a system with an old MSVCRT.
 .IF "$(USE_PERLCRT)" != "define"
 BUILDOPT	+= -DPERL_MSVCRT_READFIX
 .ENDIF

win32/win32.c

@@ -133,6 +133,21 @@ _matherr(struct _exception *a)
 }
 #endif
 
+#if _MSC_VER >= 1400
+void my_invalid_parameter_handler(const wchar_t* expression,
+    const wchar_t* function, 
+    const wchar_t* file, 
+    unsigned int line, 
+    uintptr_t pReserved)
+{
+#  ifdef _DEBUG
+    wprintf(L"Invalid parameter detected in function %s."
+            L" File: %s Line: %d\n", function, file, line);
+    wprintf(L"Expression: %s\n", expression);
+#  endif
+}
+#endif
+
 int
 IsWin95(void)
 {
@@ -4859,9 +4874,19 @@ win32_ctrlhandler(DWORD dwCtrlType)
 }
 
 
+#if _MSC_VER >= 1400
+#  include <crtdbg.h>
+#endif
+
 void
 Perl_win32_init(int *argcp, char ***argvp)
 {
+#if _MSC_VER >= 1400
+    _invalid_parameter_handler oldHandler, newHandler;
+    newHandler = my_invalid_parameter_handler;
+    oldHandler = _set_invalid_parameter_handler(newHandler);
+    _CrtSetReportMode(_CRT_ASSERT, 0);
+#endif
     /* Disable floating point errors, Perl will trap the ones we
      * care about.  VC++ RTL defaults to switching these off
      * already, but the Borland RTL doesn't.  Since we don't

win32/win32.h

@@ -510,6 +510,15 @@ typedef struct {
     char pipech;    /* one char buffer for handles opened on pipes */
     int lockinitflag;
     CRITICAL_SECTION lock;
+#if _MSC_VER >= 1400
+#  ifndef _SAFECRT_IMPL
+    /* Not used in the safecrt downlevel. We do not define them, so we cannot
+     * use them accidentally */
+    char textmode : 7;/* __IOINFO_TM_ANSI or __IOINFO_TM_UTF8 or __IOINFO_TM_UTF16LE */
+    char unicode : 1; /* Was the file opened as unicode? */
+    char pipech2[2];  /* 2 more peak ahead chars for UNICODE mode */
+#  endif
+#endif
 } ioinfo;