Amiga Plus 2002 #11/Amiga Plus CD - 2002 - No. 11.iso/Tools/Development/ncurses-5.3/ncurses/base/MKlib_gen.sh

Linux/UNIX/POSIX Shell Script | 2002-10-27 | 10.2 KB | 401 lines

#!/bin/sh
#
# MKlib_gen.sh -- generate sources from curses.h macro definitions
#
# ($Id: MKlib_gen.sh,v 1.20 2002/09/28 15:02:11 tom Exp $)
#
##############################################################################
# Copyright (c) 1998-2001,2002 Free Software Foundation, Inc.                #
#                                                                            #
# Permission is hereby granted, free of charge, to any person obtaining a    #
# copy of this software and associated documentation files (the "Software"), #
# to deal in the Software without restriction, including without limitation  #
# the rights to use, copy, modify, merge, publish, distribute, distribute    #
# with modifications, sublicense, and/or sell copies of the Software, and to #
# permit persons to whom the Software is furnished to do so, subject to the  #
# following conditions:                                                      #
#                                                                            #
# The above copyright notice and this permission notice shall be included in #
# all copies or substantial portions of the Software.                        #
#                                                                            #
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   #
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    #
# THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      #
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING    #
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER        #
# DEALINGS IN THE SOFTWARE.                                                  #
#                                                                            #
# Except as contained in this notice, the name(s) of the above copyright     #
# holders shall not be used in advertising or otherwise to promote the sale, #
# use or other dealings in this Software without prior written               #
# authorization.                                                             #
##############################################################################
#
# 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
#

# keep the editing independent of locale:
if test "${LANGUAGE+set}"    = set; then LANGUAGE=C;    export LANGUAGE;    fi
if test "${LANG+set}"        = set; then LANG=C;        export LANG;        fi
if test "${LC_ALL+set}"      = set; then LC_ALL=C;      export LC_ALL;      fi
if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
if test "${LC_COLLATE+set}"  = set; then LC_COLLATE=C;  export LC_COLLATE;  fi

preprocessor="$1 -I../include"
AWK="$2"
USE="$3"

PID=$$
ED1=sed1_${PID}.sed
ED2=sed2_${PID}.sed
ED3=sed3_${PID}.sed
ED4=sed4_${PID}.sed
AW1=awk1_${PID}.awk
AW2=awk2_${PID}.awk
TMP=gen__${PID}.c
trap "rm -f $ED1 $ED2 $ED3 $ED4 $AW1 $AW2 $TMP" 0 1 2 5 15

ALL=$USE
if test "$USE" = implemented ; then
    CALL="call_"
    cat >$ED1 <<EOF1
/^extern.*implemented/{
    h
    s/^.*implemented:\([^     *]*\).*/P_#if_USE_\1_SUPPORT/p
    g
    s/^extern \([^;]*\);.*/\1/p
    g
    s/^.*implemented:\([^     *]*\).*/P_#endif/p
}
/^extern.*generated/{
    h
    s/^.*generated:\([^     *]*\).*/P_#if_USE_\1_SUPPORT/p
    g
    s/^extern \([^;]*\);.*/\1/p
    g
    s/^.*generated:\([^     *]*\).*/P_#endif/p
}
EOF1
else
    CALL=""
    cat >$ED1 <<EOF1
/^extern.*${ALL}/{
    h
    s/^.*${ALL}:\([^     *]*\).*/P_#if_USE_\1_SUPPORT/p
    g
    s/^extern \([^;]*\);.*/\1/p
    g
    s/^.*${ALL}:\([^     *]*\).*/P_#endif/p
}
EOF1
fi

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)/
    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/ )/)/g
    s/ gen_/ /
    s/^M_/#undef /
    /^%%/s//    /
:done
EOF3

if test "$USE" = generated ; then
cat >$ED4 <<EOF
    s/^\(.*\) \(.*\) (\(.*\))\$/NCURSES_EXPORT(\1) \2 (\3)/
EOF
else
cat >$ED4 <<EOF
/^\(.*\) \(.*\) (\(.*\))\$/ {
    h
    s/^\(.*\) \(.*\) (\(.*\))\$/extern \1 call_\2 (\3);/
    p
    g
    s/^\(.*\) \(.*\) (\(.*\))\$/\1 call_\2 (\3)/
    }
EOF
fi

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;

    first=$1
    for (i = 1; i <= NF; i++) {
        if ( $i != "NCURSES_CONST" ) {
            first = i;
            break;
        }
    }
    second = first + 1;
    if ( $first == "chtype" ) {
        returnType = "Char";
    } else if ( $first == "SCREEN" ) {
        returnType = "SP";
    } else if ( $first == "WINDOW" ) {
        returnType = "Win";
    } else if ( $first == "attr_t" || $second == "attrset" || $second == "standout" || $second == "standend" || $second == "wattrset" || $second == "wstandout" || $second == "wstandend" ) {
        returnType = "Attr";
    } else if ( $first == "bool" || $first == "NCURSES_BOOL" ) {
        returnType = "Bool";
    } else if ( $second == "*" ) {
        returnType = "Ptr";
    } else {
        returnType = "Code";
    }
    myfunc = second;
    for (i = second; i <= NF; i++) {
        if ($i != "*") {
            myfunc = i;
            break;
        }
    }
    if (using == "generated") {
        print "M_" $myfunc
    }
    print $0;
    print "{";
    argcount = 1;
    check = NF - 1;
    if ($check == "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 ($myfunc ~ /innstr/)
        dotrace = 0;
    if ($myfunc ~ /innwstr/)
        dotrace = 0;

    # workaround functions that we do not parse properly
    if ($myfunc ~ /ripoffline/) {
        dotrace = 0;
        argcount = 2;
    }
    if ($myfunc ~ /wunctrl/) {
        dotrace = 0;
    }

    call = "%%T((T_CALLED(\""
    args = ""
    comma = ""
    num = 0;
    pointer = 0;
    argtype = ""
    for (i = myfunc; 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 && $check != "..." )
                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 = sprintf("return%s( ", returnType);
    else
        call = "%%return ";

    call = call $myfunc "(";
    for (i = 1; i < argcount; i++) {
        if (i != 1)
            call = call ", ";
        call = call "a" i;
    }
    if ( argcount != 0 && $check != "..." ) {
        if (argcount != 1)
            call = call ", ";
        call = call "z";
    }
    if (!match($0, "^void"))
        call = call ") ";
    if (dotrace)
        call = call ")";
    print call ";"

    if (match($0, "^void"))
        print "%%returnVoid;"
    print "}";
}
EOF1

cat >$AW2 <<EOF1
BEGIN        {
        print "/*"
        print " * DO NOT EDIT THIS FILE BY HAND!"
        printf " * It is generated by $0 %s.\n", "$USE"
        if ( "$USE" == "generated" ) {
            print " *"
            print " * This is a file of trivial functions generated from macro"
            print " * definitions in curses.h to satisfy the XSI Curses requirement"
            print " * that every macro also exist as a callable function."
            print " *"
            print " * It will never be linked unless you call one of the entry"
            print " * points with its normal macro definition disabled.  In that"
            print " * case, if you have no shared libraries, it will indirectly"
            print " * pull most of the rest of the library into your link image."
        }
        print " */"
        print "#include <curses.priv.h>"
        print ""
        }
/^DECLARATIONS/    {start = 1; next;}
        {if (start) print \$0;}
END        {
        if ( "$USE" != "generated" ) {
            print "int main(void) { return 0; }"
        }
        }
EOF1

cat >$TMP <<EOF
#include <ncurses_cfg.h>
#include <curses.h>

DECLARATIONS

EOF

sed -n -f $ED1 \
| sed -e 's/NCURSES_EXPORT(\(.*\)) \(.*\) (\(.*\))/\1 \2(\3)/' \
| sed -f $ED2 \
| $AWK -f $AW1 using=$USE \
| sed -e 's/^\([a-z_][a-z_]*[ *]*\)/\1 gen_/' -e 's/  / /g' >>$TMP

$preprocessor $TMP 2>/dev/null \
| sed -e 's/  / /g' -e 's/^ //' \
| $AWK -f $AW2 \
| sed -f $ED3 \
| sed \
    -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/    return \1;/' \
    -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/    return \1;/' \
| sed -f $ED4