1 files changed, 215 insertions, 0 deletions
diff --git a/src/pl/plperl/plperl_system.h b/src/pl/plperl/plperl_system.h
new file mode 100644
index 0000000..61550db
--- /dev/null
+++ b/src/pl/plperl/plperl_system.h
@@ -0,0 +1,215 @@
+/*-------------------------------------------------------------------------
+ *
+ * plperl_system.h
+ *	  Pull in Perl's system header files.
+ *
+ * We break this out as a separate header file to precisely control
+ * the scope of the "system_header" pragma.  No Postgres-specific
+ * declarations should be put here.  However, we do include some stuff
+ * that is meant to prevent conflicts between our code and Perl.
+ *
+ * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1995, Regents of the University of California
+ *
+ * src/pl/plperl/plperl_system.h
+ */
+
+#ifndef PL_PERL_SYSTEM_H
+#define PL_PERL_SYSTEM_H
+
+/*
+ * Newer versions of the perl headers trigger a lot of warnings with our
+ * preferred compiler flags (at least -Wdeclaration-after-statement,
+ * -Wshadow=compatible-local are known to be problematic). The system_header
+ * pragma hides warnings from within the rest of this file, if supported.
+ */
+#ifdef HAVE_PRAGMA_GCC_SYSTEM_HEADER
+#pragma GCC system_header
+#endif
+
+/* stop perl headers from hijacking stdio and other stuff on Windows */
+#ifdef WIN32
+#define WIN32IO_IS_STDIO
+#endif							/* WIN32 */
+
+/*
+ * Supply a value of PERL_UNUSED_DECL that will satisfy gcc - the one
+ * perl itself supplies doesn't seem to.
+ */
+#define PERL_UNUSED_DECL pg_attribute_unused()
+
+/*
+ * Sometimes perl carefully scribbles on our *printf macros.
+ * So we undefine them here and redefine them after it's done its dirty deed.
+ */
+#undef vsnprintf
+#undef snprintf
+#undef vsprintf
+#undef sprintf
+#undef vfprintf
+#undef fprintf
+#undef vprintf
+#undef printf
+
+/*
+ * Perl scribbles on the "_" macro too.
+ */
+#undef _
+
+/*
+ * ActivePerl 5.18 and later are MinGW-built, and their headers use GCC's
+ * __inline__.  Translate to something MSVC recognizes. Also, perl.h sometimes
+ * defines isnan, so undefine it here and put back the definition later if
+ * perl.h doesn't.
+ */
+#ifdef _MSC_VER
+#define __inline__ inline
+#ifdef isnan
+#undef isnan
+#endif
+/* Work around for using MSVC and Strawberry Perl >= 5.30. */
+#define __builtin_expect(expr, val) (expr)
+#endif
+
+/*
+ * Regarding bool, both PostgreSQL and Perl might use stdbool.h or not,
+ * depending on configuration.  If both agree, things are relatively harmless.
+ * If not, things get tricky.  If PostgreSQL does but Perl does not, define
+ * HAS_BOOL here so that Perl does not redefine bool; this avoids compiler
+ * warnings.  If PostgreSQL does not but Perl does, we need to undefine bool
+ * after we include the Perl headers; see below.
+ */
+#ifdef PG_USE_STDBOOL
+#define HAS_BOOL 1
+#endif
+
+/*
+ * Get the basic Perl API.  We use PERL_NO_GET_CONTEXT mode so that our code
+ * can compile against MULTIPLICITY Perl builds without including XSUB.h.
+ */
+#define PERL_NO_GET_CONTEXT
+#include "EXTERN.h"
+#include "perl.h"
+
+/*
+ * We want to include XSUB.h only within .xs files, because on some platforms
+ * it undesirably redefines a lot of libc functions.  But it must appear
+ * before ppport.h, so use a #define flag to control inclusion here.
+ */
+#ifdef PG_NEED_PERL_XSUB_H
+/*
+ * On Windows, win32_port.h defines macros for a lot of these same functions.
+ * To avoid compiler warnings when XSUB.h redefines them, #undef our versions.
+ */
+#ifdef WIN32
+#undef accept
+#undef bind
+#undef connect
+#undef fopen
+#undef fstat
+#undef kill
+#undef listen
+#undef lstat
+#undef mkdir
+#undef open
+#undef putenv
+#undef recv
+#undef rename
+#undef select
+#undef send
+#undef socket
+#undef stat
+#undef unlink
+#endif
+
+#include "XSUB.h"
+#endif
+
+/* put back our *printf macros ... this must match src/include/port.h */
+#ifdef vsnprintf
+#undef vsnprintf
+#endif
+#ifdef snprintf
+#undef snprintf
+#endif
+#ifdef vsprintf
+#undef vsprintf
+#endif
+#ifdef sprintf
+#undef sprintf
+#endif
+#ifdef vfprintf
+#undef vfprintf
+#endif
+#ifdef fprintf
+#undef fprintf
+#endif
+#ifdef vprintf
+#undef vprintf
+#endif
+#ifdef printf
+#undef printf
+#endif
+
+#define vsnprintf		pg_vsnprintf
+#define snprintf		pg_snprintf
+#define vsprintf		pg_vsprintf
+#define sprintf			pg_sprintf
+#define vfprintf		pg_vfprintf
+#define fprintf			pg_fprintf
+#define vprintf			pg_vprintf
+#define printf(...)		pg_printf(__VA_ARGS__)
+
+/*
+ * Put back "_" too; but rather than making it just gettext() as the core
+ * code does, make it dgettext() so that the right things will happen in
+ * loadable modules (if they've set up TEXTDOMAIN correctly).  Note that
+ * we can't just set TEXTDOMAIN here, because this file is used by more
+ * extensions than just PL/Perl itself.
+ */
+#undef _
+#define _(x) dgettext(TEXTDOMAIN, x)
+
+/* put back the definition of isnan if needed */
+#ifdef _MSC_VER
+#ifndef isnan
+#define isnan(x) _isnan(x)
+#endif
+#endif
+
+/* perl version and platform portability */
+#include "ppport.h"
+
+/*
+ * perl might have included stdbool.h.  If we also did that earlier (see c.h),
+ * then that's fine.  If not, we probably rejected it for some reason.  In
+ * that case, undef bool and proceed with our own bool.  (Note that stdbool.h
+ * makes bool a macro, but our own replacement is a typedef, so the undef
+ * makes ours visible again).
+ */
+#ifndef PG_USE_STDBOOL
+#ifdef bool
+#undef bool
+#endif
+#endif
+
+/* supply HeUTF8 if it's missing - ppport.h doesn't supply it, unfortunately */
+#ifndef HeUTF8
+#define HeUTF8(he)			   ((HeKLEN(he) == HEf_SVKEY) ?			   \
+								SvUTF8(HeKEY_sv(he)) :				   \
+								(U32)HeKUTF8(he))
+#endif
+
+/* supply GvCV_set if it's missing - ppport.h doesn't supply it, unfortunately */
+#ifndef GvCV_set
+#define GvCV_set(gv, cv)		(GvCV(gv) = cv)
+#endif
+
+/* Perl 5.19.4 changed array indices from I32 to SSize_t */
+#if PERL_BCDVERSION >= 0x5019004
+#define AV_SIZE_MAX SSize_t_MAX
+#else
+#define AV_SIZE_MAX I32_MAX
+#endif
+
+#endif							/* PL_PERL_SYSTEM_H */