libguile/guile-snarf.in

   1 #!/bin/sh
   2 # Extract the initialization actions from source files.
   3 #
   4 #  Copyright (C) 1996, 97, 98, 99, 2000, 2001, 2002 Free Software Foundation, Inc.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2, or (at your option)
   9 # any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this software; see the file COPYING.  If not, write to
  18 # the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  19 # Boston, MA 02111-1307 USA
  20
  21 # Commentary:
  22
  23 # Usage: guile-snarf [--compat=1.4] [-o OUTFILE] INFILE [CPP-OPTIONS ...]
  24 #
  25 # Process INFILE using the C pre-processor and some other programs.
  26 # Write output to a file, named OUTFILE if specified, or STEM.x if
  27 # INFILE looks like STEM.c and no OUTFILE is specified.  Ignore
  28 # lines from the input matching grep(1) regular expression:
  29 #
  30 #       ^#include ".*OUTFILE"
  31 #
  32 # If there are errors during processing, delete OUTFILE and exit with
  33 # non-zero status.
  34 #
  35 # Optional arg "--compat=1.4" means emulate guile-1.4 guile-snarf.
  36 # This option is easily misunderstood -- see Guile reference manual.
  37 #
  38 # If env var CPP is set, use its value instead of the C pre-processor
  39 # determined at Guile configure-time: "@CPP@".
  40
  41 # Code:
  42
  43 ## funcs
  44
  45 modern_snarf ()                         # writes stdout
  46 {
  47 ${cpp} -DSCM_MAGIC_SNARF_INITS "$@" > ${temp} && cpp_ok_p=true
  48 grep "^ *\^ *\^" ${temp} | sed -e "s/^ *\^ *\^//"
  49 }
  50
  51 compat_mode_clean_xxx ()                # modifies $1
  52 {
  53 filename=$1
  54 cp $filename ${temp}
  55 sed -e 's/SCM_CONST_LONG/SCM_GLOBAL_VCELL_INIT/g' \
  56     -e 's/SCM_GLOBAL_VCELL_INIT/SCM_GLOBAL_VARIABLE_INIT/g' \
  57     -e 's/SCM_GLOBAL_VCELL/SCM_GLOBAL_VARIABLE/g' \
  58     -e 's/SCM_VCELL_INIT/SCM_VARIABLE_INIT/g' \
  59     -e 's/SCM_VCELL/SCM_VARIABLE/g' \
  60     < ${temp} \
  61     > $filename
  62 }
  63
  64 ## main
  65
  66 # process command line
  67 if [ x"$1" = x--help ] ; then
  68     @AWK@ '/^#.Commentary:/,/^#.Code:/' $0 | grep -v Code: \
  69         | sed -e 1,2d -e 's/^. *//g'
  70     exit 0
  71 fi
  72 if [ x"$1" = x--compat=1.4 ]
  73     then compat_mode_p=true ; shift
  74     else compat_mode_p=false
  75 fi
  76 if [ x"$1" = x-o ]
  77     then outfile=$2 ; shift ; shift ; infile=$1 ; shift
  78     else infile=$1 ; shift ; outfile=`basename $infile .c`.x
  79 fi
  80
  81 [ x"$infile" = x ] && { echo $0: No input file ; exit 1 ; }
  82 [ ! -f "$infile" ] && { echo $0: No such file: $infile ; exit 1 ; }
  83
  84 # set vars and handler -- handle CPP override
  85 cpp_ok_p=false
  86 temp="/tmp/snarf.$$"
  87 if [ x"$CPP" = x ] ; then cpp="@CPP@" ; else cpp="$CPP" ; fi
  88 self_blind_regexp='^#include ".*'`basename $outfile`'"'
  89 clean_infile=$infile.clean.c            # temp file in same dir as infile
  90                                         # so that #include "foo" works
  91                                         # (e.g., see libguile/eval.c).
  92                                         # use .c to satisfy cpp heuristics.
  93 trap "rm -f $temp $clean_infile" 0 1 2 15
  94
  95 # clean input file
  96 grep -v "$self_blind_regexp" $infile > $clean_infile
  97 $compat_mode_p && compat_mode_clean_xxx $clean_infile
  98
  99 # do the snarfing -- output something extra for needy cpp programs (AIX)
 100 { echo "/* source: $infile */" ;
 101   echo "/* cpp-options: $@ */" ;
 102   modern_snarf "$@" $clean_infile ;
 103 } > $outfile
 104
 105 # zonk outfile if errors occurred
 106 if $cpp_ok_p ; then
 107     exit 0
 108 else
 109     rm -f $outfile
 110     exit 1
 111 fi
 112
 113 # guile-snarf ends here