contrib/uninclude

   1 #! /bin/sh
   2
   3 # (C) 1998, 2007 Free Software Foundation
   4 # Originally by Alexandre Oliva <oliva@lsd.ic.unicamp.br>
   5
   6 # This gawk/shell script is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU General Public License as published
   8 # by the Free Software Foundation; either version 3, or (at your option)
   9 # any later version.
  10
  11 # Given a preprocessed C/C++ code snippet, this script will replace any
  12 # standard header files with an actual #include <...> directive.
  13
  14 # Example:
  15 #     # 1 "test.c"
  16 #     # 1 "/usr/include/stdio.h" 1 3
  17 #     <snip>
  18 #     # 1 "test.c" 2
  19 #
  20 #     main() { printf("Hello world!\n"); }
  21
  22 # is replaced with
  23 #     # 1 "test.c"
  24 #     #include <stdio.h>
  25 #     main() { printf("Hello world!\n"); }
  26
  27
  28 # Header files whose pathnames contain any of the following patterns
  29 # are considered as standard headers: usr/include, g++-include,
  30 # include/g++, include/c++/<version>, gcc-lib/<anything>/include.
  31
  32 gawk ${EXCLUDEPATT+-vexclude="$EXCLUDEPATT"} \
  33      ${INCLUDEPATT+-vinclude="$INCLUDEPATT"} '
  34 BEGIN {
  35   skipping = 0;
  36   cppline = "^# [0-9]+ \"[^\"]*/(usr/include|g\\+\\+-include|include/g\\+\\+|include/c\\+\\+/[^/]+|gcc-lib/[^\"]+/include|gcc/include)/([^\"]+)\"( [1-4])*$"
  37 }
  38 !skipping && $0 ~ cppline &&
  39 (exclude == "" || $3 !~ exclude) && (include == "" || $3 ~ include) {
  40   skipping = 1;
  41   printf "%s\n", "#include <" gensub(cppline, "\\2", 1, $0) ">"
  42   next;
  43 }
  44 skipping && /^# [0-9]+ / && $3 == lastincluded {
  45   skipping = 0;
  46   next;
  47 }
  48 !skipping && /^# [0-9]+ / {
  49   lastincluded = $3;
  50 }
  51 !skipping { print }
  52 ' ${1+"$@"}