diff options
Diffstat (limited to 'lib/libcurses/base/MKlib_gen.sh')
| -rw-r--r-- | lib/libcurses/base/MKlib_gen.sh | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/lib/libcurses/base/MKlib_gen.sh b/lib/libcurses/base/MKlib_gen.sh new file mode 100644 index 00000000000..283a614c72d --- /dev/null +++ b/lib/libcurses/base/MKlib_gen.sh @@ -0,0 +1,255 @@ +#!/bin/sh +# +# MKlib_gen.sh -- generate sources from curses.h macro definitions +# +# $OpenBSD: MKlib_gen.sh,v 1.1 1999/01/18 19:09:32 millert Exp $ +# ($From: MKlib_gen.sh,v 1.11 1998/01/17 14:16:52 Juan.Jose.Garcia.Ripoll 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: macro-expand 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" +ED1=sed1$$.sed +ED2=sed2$$.sed +ED3=sed3$$.sed +AW1=awk1$$.awk +TMP=gen$$.c +trap "rm -f $ED1 $ED2 $ED3 $AW1 $TMP" 0 1 2 5 15 + +(cat <<EOF +#include <ncurses_cfg.h> +#include <curses.h> + +DECLARATIONS + +EOF +cat >$ED1 <<EOF1 +/^extern.*generated/{ + h + s/^.*generated:\([^ *]*\).*/P_#if_USE_\1_SUPPORT/p + g + s/^extern \([^;]*\);.*/\1/p + g + s/^.*generated:\([^ *]*\).*/P_#endif/p +} +EOF1 + +cat >$ED2 <<EOF2 +/^P_/b nc +/(void)/b nc + s/,/ a1% / + s/,/ a2% / + s/,/ a3% / + s/,/ a4% / + s/,/ a5% / + s/,/ a6% / + s/,/ a7% / + s/,/ a8% / + s/,/ a9% / + s/,/ a10% / + s/,/ a11% / + s/,/ a12% / + s/,/ a13% / + s/,/ a14% / + s/,/ a15% / + s/*/ * /g + s/%/ , /g + s/)/ z)/ +:nc + /(/s// ( / + s/)/ )/ +EOF2 + +cat >$ED3 <<EOF3 +/^P_/{ + s/^P_#if_/#if / + s/^P_// + b done +} + s/ */ /g + s/ */ /g + s/ ,/,/g + s/ )/)/g + s/ gen_/ / + s/^M_/#undef / + /^%%/s// / +:done +EOF3 + +cat >$AW1 <<\EOF1 +BEGIN { + skip=0; + } + /^P_#if/ { + print "\n" + print $0 + skip=0; + } + /^P_#endif/ { + print $0 + skip=1; + } + $0 !~ /^P_/ { + if (skip) + print "\n" + skip=1; + + print "M_" $2 + print $0; + print "{"; + argcount = 1; + if (NF == 5 && $4 == "void") + argcount = 0; + if (argcount != 0) { + for (i = 1; i <= NF; i++) + if ($i == ",") + argcount++; + } + + # suppress trace-code for functions that we cannot do properly here, + # since they return data. + dotrace = 1; + if ($2 == "innstr") + dotrace = 0; + + call = "%%T((T_CALLED(\"" + args = "" + comma = "" + num = 0; + pointer = 0; + argtype = "" + for (i = 1; i <= NF; i++) { + ch = $i; + if ( ch == "*" ) + pointer = 1; + else if ( ch == "va_list" ) + pointer = 1; + else if ( ch == "char" ) + argtype = "char"; + else if ( ch == "int" ) + argtype = "int"; + else if ( ch == "short" ) + argtype = "short"; + else if ( ch == "chtype" ) + argtype = "chtype"; + else if ( ch == "attr_t" || ch == "NCURSES_ATTR_T" ) + argtype = "attr"; + + if ( ch == "," || ch == ")" ) { + if (pointer) { + if ( argtype == "char" ) { + call = call "%s" + comma = comma "_nc_visbuf2(" num "," + pointer = 0; + } else + call = call "%p" + } else if (argcount != 0) { + if ( argtype == "int" || argtype == "short" ) { + call = call "%d" + argtype = "" + } else if ( argtype != "" ) { + call = call "%s" + comma = comma "_trace" argtype "2(" num "," + } else { + call = call "%#lx" + comma = comma "(long)" + } + } + if (ch == ",") + args = args comma "a" ++num; + else if (argcount != 0) + args = args comma "z" + call = call ch + if (pointer == 0 && argcount != 0 && argtype != "" ) + args = args ")" + if (args != "") + comma = ", " + pointer = 0; + argtype = "" + } + if ( i == 2 || ch == "(" ) + call = call ch + } + call = call "\")" + if (args != "") + call = call ", " args + call = call ")); " + + if (dotrace) + printf "%s", call + + if (match($0, "^void")) + call = "" + else if (dotrace) + call = "returnCode( "; + else + call = "%%return "; + + call = call $2 "("; + for (i = 1; i < argcount; i++) + call = call "a" i ", "; + if (argcount != 0) + call = call "z"; + if (!match($0, "^void")) + call = call ") "; + if (dotrace) + call = call ")"; + print call ";" + + if (match($0, "^void")) + print "%%returnVoid;" + print "}"; +} +EOF1 + +sed -n -f $ED1 | sed -f $ED2 \ +| $AWK -f $AW1 ) \ +| 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 to satisfy the XSI Curses requirement" + print " * that every macro also exist as a callable function." + print " *" + print " * It will never 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 " */" + print "#include <curses.priv.h>" + print "" + } +/^DECLARATIONS/ {start = 1; next;} + {if (start) print $0;} +' \ +| sed -f $ED3 \ +| sed \ + -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/ return \1;/' \ + -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/ return \1;/' + |