From 2c7347666572e6cde8404ec5029567bb96d68a0d Mon Sep 17 00:00:00 2001
From: tholo <tholo@openbsd.org>
Date: Mon, 16 Dec 1996 08:43:21 +0000
Subject: [PATCH] Generate library versions of macro implementations as well

---
 lib/libcurses/MKlib_gen.sh  | 118 ++++++++++++++++++++++++++++++++++++
 lib/libcurses/Makefile      |   9 ++-
 lib/libcurses/shlib_version |   2 +-
 3 files changed, 125 insertions(+), 4 deletions(-)
 create mode 100644 lib/libcurses/MKlib_gen.sh

diff --git a/lib/libcurses/MKlib_gen.sh b/lib/libcurses/MKlib_gen.sh
new file mode 100644
index 00000000000..e384cde2185
--- /dev/null
+++ b/lib/libcurses/MKlib_gen.sh
@@ -0,0 +1,118 @@
+#!/bin/sh
+#
+# MKlib_gen.sh -- generate sources from curses.h macro definitions
+#
+# ($Id: MKlib_gen.sh,v 1.1 1996/12/16 08:43:21 tholo Exp $)
+#
+# The XSI Curses standard requires all curses entry points to exist as
+# functions, even though many definitions would normally be shadowed
+# by macros.  Rather than hand-hack all that code, we actually
+# generate functions from the macros.
+#
+# This script accepts a file of prototypes on standard input.  It discards
+# any that don't have a `generated' comment attached. It then parses each
+# prototype (relying on the fact that none of the macros take function 
+# pointer or array arguments) and generates C source from it.
+#
+# Here is what the pipeline stages are doing:
+#
+# 1. sed: extract prototypes of generated functions
+# 2. sed: decorate prototypes with generated arguments a1. a2,...z
+# 3. awk: generate the calls with args matching the formals 
+# 4. sed: prefix function names in prototypes so the preprocessor won't expand
+#         them.
+# 5. cpp: macroexpand the file so the macro calls turn into C calls
+# 6. awk: strip the expansion junk off the front and add the new header
+# 7. sed: squeeze spaces, strip off gen_ prefix, create needed #undef
+#
+
+preprocessor="$1 -I../include"
+AWK="$2"
+TMP=gen$$.c
+trap "rm -f $TMP" 0 1 2 5 15
+
+(cat <<EOF
+#include "curses.h"
+
+DECLARATIONS
+
+EOF
+sed -n -e "/^extern.*generated/s/^extern \([^;]*\);.*/\1/p" \
+| sed \
+	-e "/(/s// (/" \
+	-e "/(void)/b nc" \
+	-e "s/,/ a1% /" \
+	-e "s/,/ a2% /" \
+	-e "s/,/ a3% /" \
+	-e "s/,/ a4% /" \
+	-e "s/,/ a5% /" \
+	-e "s/,/ a6% /" \
+	-e "s/,/ a7% /" \
+	-e "s/,/ a8% /" \
+	-e "s/,/ a9% /" \
+	-e "s/,/ a10% /" \
+	-e "s/,/ a11% /" \
+	-e "s/,/ a12% /" \
+	-e "s/,/ a13% /" \
+	-e "s/,/ a14% /" \
+	-e "s/,/ a15% /" \
+	-e "s/%/,/g" \
+	-e "s/)/ z)/" \
+	-e ":nc" \
+| $AWK '{
+	print "\n"
+	print "M_" $2
+	print $0;
+	print "{";
+	for (i = argcount = 0; i < length($0); i++)
+		if (substr($0, i, 1) == ",")
+			argcount++;
+	++argcount;
+	if (match($0, "^void"))
+		call = "%%"
+	else
+		call = "%%return ";
+	call = call $2 "(";
+	for (i = 1; i < argcount; i++)
+		call = call " a" i ", ";
+	if (match($0, "\\(void\\)"))
+		call = call ");";
+	else
+		call = call "z);";
+	print call
+	print "}";
+}
+' ) \
+| sed \
+	-e '/^\([a-z_][a-z_]*\) /s//\1 gen_/' >$TMP
+  $preprocessor $TMP 2>/dev/null \
+| $AWK '
+BEGIN		{
+	print "/*"
+	print " * DO NOT EDIT THIS FILE BY HAND!"
+	print " * It is generated by MKlib_gen.sh."
+	print " *"
+	print " * This is a file of trivial functions generated from macro"
+	print " * definitions in curses.h in order to satisfy the XSI Curses"
+	print " * requirement that every macro also exist as a callable"
+	print " * function."
+	print " *"
+	print " * It will neever be linked unless you call one of the entry"
+	print " * points with its normal macro definition disabled.  In that"
+	print " * case, if you have no shared libraries, it will indirectly"
+	print " * pull most of the rest of the library into your link image."
+	print " * Cope with it."
+	print " */"
+	print "#include \"curses.h\""
+	print ""
+		}
+/^DECLARATIONS/	{start = 1; next;}
+		{if (start) print $0;}
+' \
+| sed \
+	-e 's/		*/ /g' \
+	-e 's/  */ /g' \
+	-e 's/ gen_/ /' \
+	-e 's/^M_/#undef /' \
+	-e '/^%%/s//	/'
+
diff --git a/lib/libcurses/Makefile b/lib/libcurses/Makefile
index 5cc9cfabfd8..ca22e03611f 100644
--- a/lib/libcurses/Makefile
+++ b/lib/libcurses/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.8 1996/12/08 15:22:26 downsj Exp $
+#	$OpenBSD: Makefile,v 1.9 1996/12/16 08:43:22 tholo Exp $
 
 LIB=    curses
 SRCS=	hardscroll.c lib_acs.c lib_delch.c lib_insstr.c lib_options.c \
@@ -11,7 +11,7 @@ SRCS=	hardscroll.c lib_acs.c lib_delch.c lib_insstr.c lib_options.c \
 	lib_vidattr.c lib_clrbot.c lib_inchstr.c lib_mvcur.c lib_scanw.c \
 	lib_window.c lib_clreol.c lib_initscr.c lib_mvwin.c lib_screen.c \
 	lib_color.c lib_insch.c lib_newterm.c lib_scroll.c lib_data.c \
-	lib_insdel.c lib_keyname.c lib_newwin.c lib_scrreg.c
+	lib_insdel.c lib_keyname.c lib_newwin.c lib_scrreg.c lib_gen.c
 CFLAGS+= -I. -I${.CURDIR} -DTERMIOS -DEXTERN_TERMINFO
 LDADD+=  -ltermlib
 MAN=	curs_addch.3 curs_addchstr.3 curs_addstr.3 curs_attr.3 curs_beep.3 \
@@ -23,7 +23,7 @@ MAN=	curs_addch.3 curs_addchstr.3 curs_addstr.3 curs_attr.3 curs_beep.3 \
 	curs_scanw.3 curs_scr_dmp.3 curs_scroll.3 curs_slk.3 curs_termattrs.3 \
 	curs_touch.3 curs_util.3 curs_window.3 curses.3
 MLINKS+=curses.3 ncurses.3
-CLEANFILES+= lib_keyname.c keys.tries
+CLEANFILES+= lib_gen.c lib_keyname.c keys.tries
 
 beforedepend: keys.tries
 
@@ -42,6 +42,9 @@ keys.tries: ${.CURDIR}/keys.list ${.CURDIR}/MKkeys.awk
 lib_keyname.c: ${.CURDIR}/keys.list ${.CURDIR}/MKkeyname.awk
 	awk -f ${.CURDIR}/MKkeyname.awk ${.CURDIR}/keys.list > lib_keyname.c
 
+lib_gen.c: ${.CURDIR}/curses.h ${.CURDIR}/MKlib_gen.sh
+	sh ${.CURDIR}/MKlib_gen.sh "${CPP}" "awk" < ${.CURDIR}/curses.h > lib_gen.c
+
 .include <bsd.lib.mk>
 
 lib_options.o lib_options.so lib_options.po lib_options.ln: keys.tries
diff --git a/lib/libcurses/shlib_version b/lib/libcurses/shlib_version
index 012c14171d3..3f0196ebf4a 100644
--- a/lib/libcurses/shlib_version
+++ b/lib/libcurses/shlib_version
@@ -1,2 +1,2 @@
 major=3
-minor=0
+minor=1
-- 
2.20.1