kc3-lang/freetype/builds/atari/deflinejoiner.awk

Branch : - branch - master v2.13 - tag -

• Show log

  Commit

• Author : Werner Lemberg
  Date : 2013-01-24 13:33:06
  Hash : 4cd5fd46
  Message : Remove trailing whitespace.

• builds/atari/deflinejoiner.awk

• #!/usr/bin/env awk
  
  
  function shift( array, \
                  junk, elm0, l )
  {
    elm0 = array[0]
    for ( l = 0; l < asorti( array, junk ) - 1; l++ )
      array[l] = array[l+1];
    delete array[l]
    return elm0
  }
  
  
  function init_cpp_src_line()
  {
    logical_line = ""
    delete break_pos
  }
  
  
  function shift_valid_bp( array, \
                           junk, elm )
  {
    elm = -1
  
    if ( 0 < asorti( array, junk ) )
      do {
        elm = shift( array )
      } while ( 0 > elm );
  
    return elm
  }
  
  
  function check_cpp_src_line_break_pos( \
                                         i, junk )
  {
    printf( "break_pos:" )
    for ( i = 0; i < asorti( break_pos, junk ); i++ )
      printf( " %d", break_pos[i] );
    printf( "\n" )
  }
  
  
  function check_cpp_src_line()
  {
    printf( "logical_line[%s]\n", logical_line )
    check_cpp_src_line_break_pos()
  }
  
  
  function append_line( phys_line, \
                        filt_line, bp_len )
  {
    filt_line = phys_line
    sub( /\\$/, " ", filt_line )
    logical_line    = logical_line filt_line
    bp_len = asorti( break_pos, junk )
    break_pos[bp_len] = length( logical_line ) - 1
  }
  
  
  function print_line( \
                       c0, c1, i, junk, part_str )
  {
    c0 = 0
  
    while( asorti( break_pos, junk ) > 1 )
    {
      if ( ( c1 = shift_valid_bp( break_pos ) ) < 1 )
      {
        part_str = substr( logical_line, c0 + 1 )
        printf( "%s\n", part_str )
        return
      }
  
      part_str = substr( logical_line, c0 + 1, c1 - c0 + 1 )
      gsub( / $/, "\\", part_str )
      printf( "%s\n", part_str )
      c0 = c1 + 1
    }
  
    part_str = substr( logical_line, c0 + 1 )
    printf( "%s\n", part_str )
  }
  
  
  function shrink_spaces( pos, \
                          tail, removed_length, k )
  {
    tail = substr( logical_line, pos )
    sub( /^[ \t]+/, " ", tail )
    removed_length = length( logical_line ) - pos - length( tail ) + 1
    logical_line = substr( logical_line, 0, pos - 1 ) tail
  
  
    for ( k = 0; k < asorti( break_pos, junk ); k++ )
      if ( ( pos + removed_length ) <= break_pos[k] )
        break_pos[k] = break_pos[k] - removed_length;
      else if ( pos <= break_pos[k] )
        break_pos[k] = -1;
  
    return removed_length
  }
  
  
  function shrink_spaces_to_linebreak( pos, \
                                       junk, part_str, removed_length, i )
  {
    for ( i = 0; i < asorti( break_pos, junk ) && break_pos[i] < pos ; i++ )
      ;
  
    if ( break_pos[i] < 1 )
      return;
  
    part_str = substr( logical_line, pos, break_pos[i] - pos + 1 )
    sub( /^[ \t]+/, " ", part_str )
    removed_length = ( break_pos[i] - pos + 1 ) - length( part_str )
  
    tail = substr( logical_line, pos + removed_length )
    logical_line = substr( logical_line, 0, pos - 1 ) tail
  
    for ( ; i < asorti( break_pos, junk ); i++ )
      break_pos[i] -= removed_length;
  
    return removed_length
  }
  
  
  function delete_linebreaks_in_2nd_token( \
                                             tail, paren_depth, junk, i, j, k, l )
  {
    if ( logical_line ~ /^[ \t]*#[ \t]*define[ \t]+[0-9A-Za-z_]+\(/ )
    {
      tail = logical_line
      sub( /^[ \t]*#[ \t]*define[ \t]+[0-9A-Za-z_]+/, "", tail )
  
      paren_depth = 0
      l = 0
      i = length( logical_line ) - length( tail ) + 1 # seek to the 1st op paren
      j = i
      do {
        if ( substr( logical_line, j, 2 ) ~ /[ \t][ \t]/ )
          l = shrink_spaces( j );
        else if ( substr( logical_line, j, 1 ) == "(" )
          paren_depth += 1;
        else if ( substr( logical_line, j, 1 ) == ")" )
          paren_depth -= 1;
        j += 1
      } while ( j < length( logical_line ) && paren_depth != 0 )
  
      for ( k = 0; k < asorti( break_pos, junk ); k++ )
        if ( i <= break_pos[k] && break_pos[k] < j )
          break_pos[k] = -1;
  
      if ( l > 0 )
        shrink_spaces_to_linebreak( j );
    }
  }
  
  
  BEGIN{
    init_cpp_src_line()
  }
  {
    append_line( $0 )
    if ( $0 !~ /\\$/ )
    {
      delete_linebreaks_in_2nd_token()
      print_line()
      init_cpp_src_line()
    }
  }
  END{
    if ( 0 < length( logical_line ) )
    {
      delete_linebreaks_in_2nd_token()
      print_line()
    }
  }