common/protocol/generate-protostrings.sh.in

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright Red Hat
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met:
   8 #
   9 # * Redistributions of source code must retain the above copyright
  10 # notice, this list of conditions and the following disclaimer.
  11 #
  12 # * Redistributions in binary form must reproduce the above copyright
  13 # notice, this list of conditions and the following disclaimer in the
  14 # documentation and/or other materials provided with the distribution.
  15 #
  16 # * Neither the name of Red Hat nor the names of its contributors may be
  17 # used to endorse or promote products derived from this software without
  18 # specific prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  24 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32
  33 # The header.
  34 cat <<'EOF'
  35 /* Generated from nbd-protocol.h by generate-protostrings.sh.
  36  * License of this file is BSD, the same as the rest of nbdkit.
  37  */
  38
  39 #include <stdio.h>
  40 #include "nbd-protocol.h"
  41
  42 EOF
  43
  44 declare -A functions=(
  45     [global_flag]=NBD_FLAG_FIXED_NEWSTYLE
  46     [flag]=NBD_FLAG_HAS_FLAGS
  47     [opt]=NBD_OPT_EXPORT_NAME
  48     [rep]=NBD_REP_ACK
  49     [info]=NBD_INFO_EXPORT
  50     [reply]=NBD_REPLY_FLAG_DONE
  51     [reply_type]=NBD_REPLY_TYPE_NONE
  52     [cmd]=NBD_CMD_READ
  53     [cmd_flag]=NBD_CMD_FLAG_FUA
  54     [error]=NBD_SUCCESS
  55 )
  56
  57 # Generate each 'const char *name_of_nbd_<fn>'
  58 keys=$( printf '%s\n' ${!functions[@]} | sort )
  59 for fn in $keys; do
  60     echo 'extern const char *'
  61     echo "name_of_nbd_$fn (unsigned int fl)"
  62     echo '{'
  63     echo '  static char buf[] = "unknown (0x00000000)";'
  64     echo '  switch (fl) {'
  65
  66     # We look for the first #define <symbol> and rewrite every
  67     # line up to the next blank line.
  68     symbol="${functions[$fn]}"
  69     @SED@ -n "/^#define $symbol/,/^$/p" nbd-protocol.h |
  70         @SED@ 's/^#define \([_A-Z]*\).*/  case \1:\
  71     return "\1\";/'
  72
  73     echo '  default:'
  74     echo '    snprintf (buf, sizeof buf, "unknown (0x%x)", fl);'
  75     echo '    return buf;'
  76     echo '  }'
  77     echo '}'
  78     echo
  79 done