Please fix GCC warnings

[praiskup]

There are manywarnings on Fedora Rawhide e.g.:

'BYTE_CASE'
       BYTE_CASE((stream->dec_hdr_ind & VCD_CODETABLE) != 0,
       ^~~~~~~~~
xdelta3-decode.h:926:5: note: here
     case DEC_TABDAT:
     ^~~~
xdelta3-decode.h:944:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = DEC_APPLEN;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:946:5: note: here
     case DEC_APPLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:948:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE((stream->dec_hdr_ind & VCD_APPHEADER) != 0,
       ^~~~~~~~~
xdelta3-decode.h:951:5: note: here
     case DEC_APPDAT:
     ^~~~
xdelta3-decode.h:983:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = DEC_WININD;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:985:5: note: here
     case DEC_WININD:
     ^~~~
xdelta3-decode.h:1011:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_CPYLEN;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:1017:5: note: here
     case DEC_CPYLEN:
     ^~~~
xdelta3-decode.h:1026:28: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_position = stream->dec_cpylen;
       ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
xdelta3-decode.h:1028:5: note: here
     case DEC_CPYOFF:
     ^~~~
xdelta3-decode.h:1042:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_win_ind & VCD_TARGET) &&
          ^
xdelta3-decode.h:1050:5: note: here
     case DEC_ENCLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1052:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->dec_enclen, DEC_TGTLEN);
       ^~~~~~~~~
xdelta3-decode.h:1053:5: note: here
     case DEC_TGTLEN:
     ^~~~
xdelta3-decode.h:1073:26: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_maxpos = stream->dec_cpylen + stream->dec_tgtlen;
       ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xdelta3-decode.h:1075:5: note: here
     case DEC_DELIND:
     ^~~~
xdelta3-decode.h:1086:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_del_ind != 0) && (stream->sec_type == NULL))
          ^
xdelta3-decode.h:1093:5: note: here
     case DEC_DATALEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1094:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->data_sect.size, DEC_INSTLEN);
       ^~~~~~~~~
xdelta3-decode.h:1095:5: note: here
     case DEC_INSTLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1096:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->inst_sect.size, DEC_ADDRLEN);
       ^~~~~~~~~
xdelta3-decode.h:1097:5: note: here
     case DEC_ADDRLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1098:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->addr_sect.size, DEC_CKSUM);
       ^~~~~~~~~
xdelta3-decode.h:1100:5: note: here
     case DEC_CKSUM:
     ^~~~
xdelta3-decode.h:1149:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
      if ((ret = xd3_decode_sections (stream))) { return ret; }
         ^
xdelta3-decode.h:1151:5: note: here
     case DEC_EMIT:
     ^~~~
In file included from xdelta3.c:718:
xdelta3-main.h: In function 'main_file_read':
xdelta3-main.h:1063:47: warning: cast between incompatible function types from 'ssize_t (*)(int,  void *, size_t)' {aka 'long int (*)(int,  void *, long unsigned int)'} to 'int (*)(int,  uint8_t *, usize_t)' {aka 'int (*)(int,  unsigned char *, long unsigned int)'} [-Wcast-function-type]
   ret = xd3_posix_io (ifile->file, buf, size, (xd3_posix_func*) &read, nread);
                                               ^
xdelta3-main.h: In function 'main_file_write':
xdelta3-main.h:1097:47: warning: cast between incompatible function types from 'ssize_t (*)(int,  const void *, size_t)' {aka 'long int (*)(int,  const void *, long unsigned int)'} to 'int (*)(int,  uint8_t *, usize_t)' {aka 'int (*)(int,  unsigned char *, long unsigned int)'} [-Wcast-function-type]
   ret = xd3_posix_io (ofile->file, buf, size, (xd3_posix_func*) &write, NULL);
                                               ^
xdelta3-decode.h: In function 'xd3_decode_sections':
xdelta3-decode.h:702:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((ret = xd3_decode_section (stream, & stream->data_sect,
          ^
xdelta3-decode.h:704:5: note: here
     case DEC_INST:
     ^~~~
xdelta3-decode.h:705:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((ret = xd3_decode_section (stream, & stream->inst_sect,
          ^
xdelta3-decode.h:707:5: note: here
     case DEC_ADDR:
     ^~~~
In file included from xdelta3.c:718:
xdelta3-main.h: In function 'main_pipe_write':
xdelta3-main.h:2118:7: warning: cast between incompatible function types from 'ssize_t (*)(int,  const void *, size_t)' {aka 'long int (*)(int,  const void *, long unsigned int)'} to 'int (*)(int,  uint8_t *, usize_t)' {aka 'int (*)(int,  unsigned char *, long unsigned int)'} [-Wcast-function-type]
       (xd3_posix_func*) &write, NULL)))
       ^
In file included from testing/../xdelta3.c:718,
                 from testing/regtest_c.c:2:
testing/../xdelta3-main.h: In function 'main_file_read':
testing/../xdelta3-main.h:1063:47: warning: cast between incompatible function types from 'ssize_t (*)(int,  void *, size_t)' {aka 'long int (*)(int,  void *, long unsigned int)'} to 'int (*)(int,  uint8_t *, usize_t)' {aka 'int (*)(int,  unsigned char *, long unsigned int)'} [-Wcast-function-type]
   ret = xd3_posix_io (ifile->file, buf, size, (xd3_posix_func*) &read, nread);
                                               ^
testing/../xdelta3-main.h: In function 'main_file_write':
testing/../xdelta3-main.h:1097:47: warning: cast between incompatible function types from 'ssize_t (*)(int,  const void *, size_t)' {aka 'long int (*)(int,  const void *, long unsigned int)'} to 'int (*)(int,  uint8_t *, usize_t)' {aka 'int (*)(int,  unsigned char *, long unsigned int)'} [-Wcast-function-type]
   ret = xd3_posix_io (ofile->file, buf, size, (xd3_posix_func*) &write, NULL);
                                               ^
In file included from testing/../xdelta3.c:718,
                 from testing/regtest_c.c:2:
testing/../xdelta3-main.h: In function 'main_pipe_write':
testing/../xdelta3-main.h:2118:7: warning: cast between incompatible function types from 'ssize_t (*)(int,  const void *, size_t)' {aka 'long int (*)(int,  const void *, long unsigned int)'} to 'int (*)(int,  uint8_t *, usize_t)' {aka 'int (*)(int,  unsigned char *, long unsigned int)'} [-Wcast-function-type]
       (xd3_posix_func*) &write, NULL)))
       ^
In file included from xdelta3.c:2065,
                 from xdelta3.c:658:
xdelta3-decode.h: In function 'xd3_decode_input':
xdelta3-decode.h:867:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_HDRIND;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:869:5: note: here
     case DEC_HDRIND:
     ^~~~
xdelta3-decode.h:882:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_SECONDID;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
xdelta3-decode.h:885:5: note: here
     case DEC_SECONDID:
     ^~~~
xdelta3-decode.h:887:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_hdr_ind & VCD_SECONDARY) != 0)
          ^
xdelta3-decode.h:905:5: note: here
     case DEC_TABLEN:
     ^~~~
xdelta3-decode.h:911:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_hdr_ind & VCD_CODETABLE) != 0) {
          ^
xdelta3-decode.h:918:5: note: here
     case DEC_NEAR:
     ^~~~
xdelta3-decode.h:826:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:920:7: note: in expansion of macro 'BYTE_CASE'
       BYTE_CASE((stream->dec_hdr_ind & VCD_CODETABLE) != 0,
       ^~~~~~~~~
xdelta3-decode.h:922:5: note: here
     case DEC_SAME:
     ^~~~
xdelta3-decode.h:826:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:924:7: note: in expansion of macro 'BYTE_CASE'
       BYTE_CASE((stream->dec_hdr_ind & VCD_CODETABLE) != 0,
       ^~~~~~~~~
xdelta3-decode.h:926:5: note: here
     case DEC_TABDAT:
     ^~~~
xdelta3-decode.h:944:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = DEC_APPLEN;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:946:5: note: here
     case DEC_APPLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:948:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE((stream->dec_hdr_ind & VCD_APPHEADER) != 0,
       ^~~~~~~~~
xdelta3-decode.h:951:5: note: here
     case DEC_APPDAT:
     ^~~~
xdelta3-decode.h:983:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = DEC_WININD;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:985:5: note: here
     case DEC_WININD:
     ^~~~
xdelta3-decode.h:1011:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_CPYLEN;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
xdelta3-decode.h:1017:5: note: here
     case DEC_CPYLEN:
     ^~~~
xdelta3-decode.h:1026:28: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_position = stream->dec_cpylen;
       ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
xdelta3-decode.h:1028:5: note: here
     case DEC_CPYOFF:
     ^~~~
xdelta3-decode.h:1042:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_win_ind & VCD_TARGET) &&
          ^
xdelta3-decode.h:1050:5: note: here
     case DEC_ENCLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1052:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->dec_enclen, DEC_TGTLEN);
       ^~~~~~~~~
xdelta3-decode.h:1053:5: note: here
     case DEC_TGTLEN:
     ^~~~
xdelta3-decode.h:1073:26: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_maxpos = stream->dec_cpylen + stream->dec_tgtlen;
       ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xdelta3-decode.h:1075:5: note: here
     case DEC_DELIND:
     ^~~~
xdelta3-decode.h:1086:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_del_ind != 0) && (stream->sec_type == NULL))
          ^
xdelta3-decode.h:1093:5: note: here
     case DEC_DATALEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1094:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->data_sect.size, DEC_INSTLEN);
       ^~~~~~~~~
xdelta3-decode.h:1095:5: note: here
     case DEC_INSTLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1096:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->inst_sect.size, DEC_ADDRLEN);
       ^~~~~~~~~
xdelta3-decode.h:1097:5: note: here
     case DEC_ADDRLEN:
     ^~~~
xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
xdelta3-decode.h:1098:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->addr_sect.size, DEC_CKSUM);
       ^~~~~~~~~
xdelta3-decode.h:1100:5: note: here
     case DEC_CKSUM:
     ^~~~
xdelta3-decode.h:1149:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
      if ((ret = xd3_decode_sections (stream))) { return ret; }
         ^
xdelta3-decode.h:1151:5: note: here
     case DEC_EMIT:
     ^~~~
xdelta3-decode.h: In function 'xd3_decode_sections':
xdelta3-decode.h:702:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((ret = xd3_decode_section (stream, & stream->data_sect,
          ^
xdelta3-decode.h:704:5: note: here
     case DEC_INST:
     ^~~~
xdelta3-decode.h:705:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((ret = xd3_decode_section (stream, & stream->inst_sect,
          ^
xdelta3-decode.h:707:5: note: here
     case DEC_ADDR:
     ^~~~
In file included from xdelta3.c:658:
xdelta3.c: In function 'xd3_encode_input':
xdelta3.c:3151:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
        if (stream->avail_in > 0)
           ^
xdelta3.c:3166:6: note: here
      case MATCH_FORWARD:
      ^~~~
xdelta3.c:3090:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->enc_state = ENC_INPUT;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
xdelta3.c:3092:5: note: here
     case ENC_INPUT:
     ^~~~
xdelta3.c:3201:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->enc_state = ENC_INSTR;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
xdelta3.c:3203:5: note: here
     case ENC_INSTR:
     ^~~~
xdelta3.c:3215:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->enc_state = ENC_FLUSH;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
xdelta3.c:3217:5: note: here
     case ENC_FLUSH:
     ^~~~
xdelta3.c:3247:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if (stream->avail_out > 0)
          ^
xdelta3.c:3253:5: note: here
     case ENC_POSTOUT:
     ^~~~
In file included from xdelta3.c:718:
xdelta3-main.h: In function 'main':
xdelta3-main.h:3752:18: warning: this statement may fall through [-Wimplicit-fallthrough=]
    option_force2 = 1;
    ~~~~~~~~~~~~~~^~~
xdelta3-main.h:3758:2: note: here
  case 'v': option_verbose += 1; option_quiet = 0; break;
  ^~~~
xdelta3-main.h: In function 'main_input':
In file included from testing/../xdelta3.c:2065,
                 from testing/../xdelta3.c:658,
                 from testing/regtest_c.c:2:
testing/../xdelta3-decode.h: In function 'xd3_decode_input':
testing/../xdelta3-decode.h:867:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_HDRIND;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
testing/../xdelta3-decode.h:869:5: note: here
     case DEC_HDRIND:
     ^~~~
testing/../xdelta3-decode.h:882:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_SECONDID;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
testing/../xdelta3-decode.h:885:5: note: here
     case DEC_SECONDID:
     ^~~~
testing/../xdelta3-decode.h:887:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_hdr_ind & VCD_SECONDARY) != 0)
          ^
testing/../xdelta3-decode.h:905:5: note: here
     case DEC_TABLEN:
     ^~~~
testing/../xdelta3-decode.h:911:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_hdr_ind & VCD_CODETABLE) != 0) {
          ^
testing/../xdelta3-decode.h:918:5: note: here
     case DEC_NEAR:
     ^~~~
testing/../xdelta3-decode.h:826:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:920:7: note: in expansion of macro 'BYTE_CASE'
       BYTE_CASE((stream->dec_hdr_ind & VCD_CODETABLE) != 0,
       ^~~~~~~~~
testing/../xdelta3-decode.h:922:5: note: here
     case DEC_SAME:
     ^~~~
testing/../xdelta3-decode.h:826:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:924:7: note: in expansion of macro 'BYTE_CASE'
       BYTE_CASE((stream->dec_hdr_ind & VCD_CODETABLE) != 0,
       ^~~~~~~~~
testing/../xdelta3-decode.h:926:5: note: here
     case DEC_TABDAT:
     ^~~~
testing/../xdelta3-decode.h:944:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = DEC_APPLEN;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
testing/../xdelta3-decode.h:946:5: note: here
     case DEC_APPLEN:
     ^~~~
testing/../xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:948:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE((stream->dec_hdr_ind & VCD_APPHEADER) != 0,
       ^~~~~~~~~
testing/../xdelta3-decode.h:951:5: note: here
     case DEC_APPDAT:
     ^~~~
testing/../xdelta3-decode.h:983:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = DEC_WININD;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
testing/../xdelta3-decode.h:985:5: note: here
     case DEC_WININD:
     ^~~~
testing/../xdelta3-decode.h:1011:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
  stream->dec_state = DEC_CPYLEN;
  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
testing/../xdelta3-decode.h:1017:5: note: here
     case DEC_CPYLEN:
     ^~~~
testing/../xdelta3-decode.h:1026:28: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_position = stream->dec_cpylen;
       ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
testing/../xdelta3-decode.h:1028:5: note: here
     case DEC_CPYOFF:
     ^~~~
testing/../xdelta3-decode.h:1042:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_win_ind & VCD_TARGET) &&
          ^
testing/../xdelta3-decode.h:1050:5: note: here
     case DEC_ENCLEN:
     ^~~~
testing/../xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:1052:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->dec_enclen, DEC_TGTLEN);
       ^~~~~~~~~
testing/../xdelta3-decode.h:1053:5: note: here
     case DEC_TGTLEN:
     ^~~~
testing/../xdelta3-decode.h:1073:26: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_maxpos = stream->dec_cpylen + stream->dec_tgtlen;
       ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
testing/../xdelta3-decode.h:1075:5: note: here
     case DEC_DELIND:
     ^~~~
testing/../xdelta3-decode.h:1086:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((stream->dec_del_ind != 0) && (stream->sec_type == NULL))
          ^
testing/../xdelta3-decode.h:1093:5: note: here
     case DEC_DATALEN:
     ^~~~
testing/../xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:1094:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->data_sect.size, DEC_INSTLEN);
       ^~~~~~~~~
testing/../xdelta3-decode.h:1095:5: note: here
     case DEC_INSTLEN:
     ^~~~
testing/../xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:1096:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->inst_sect.size, DEC_ADDRLEN);
       ^~~~~~~~~
testing/../xdelta3-decode.h:1097:5: note: here
     case DEC_ADDRLEN:
     ^~~~
testing/../xdelta3-decode.h:840:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->dec_state = (nstate); \
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
testing/../xdelta3-decode.h:1098:7: note: in expansion of macro 'SIZE_CASE'
       SIZE_CASE(1, stream->addr_sect.size, DEC_CKSUM);
       ^~~~~~~~~
testing/../xdelta3-decode.h:1100:5: note: here
     case DEC_CKSUM:
     ^~~~
testing/../xdelta3-decode.h:1149:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
      if ((ret = xd3_decode_sections (stream))) { return ret; }
         ^
testing/../xdelta3-decode.h:1151:5: note: here
     case DEC_EMIT:
     ^~~~
testing/../xdelta3-decode.h: In function 'xd3_decode_sections':
testing/../xdelta3-decode.h:702:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((ret = xd3_decode_section (stream, & stream->data_sect,
          ^
testing/../xdelta3-decode.h:704:5: note: here
     case DEC_INST:
     ^~~~
testing/../xdelta3-decode.h:705:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if ((ret = xd3_decode_section (stream, & stream->inst_sect,
          ^
testing/../xdelta3-decode.h:707:5: note: here
     case DEC_ADDR:
     ^~~~
In file included from testing/../xdelta3.c:267,
                 from testing/regtest_c.c:2:
testing/../xdelta3.c: In function 'xd3_encode_input':
testing/../xdelta3.h:406:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
     if (! (x)) {         \
        ^
testing/../xdelta3.c:3164:8: note: in expansion of macro 'XD3_ASSERT'
        XD3_ASSERT (stream->match_fwd == 0);
        ^~~~~~~~~~
In file included from testing/../xdelta3.c:658,
                 from testing/regtest_c.c:2:
testing/../xdelta3.c:3166:6: note: here
      case MATCH_FORWARD:
      ^~~~
testing/../xdelta3.c:3090:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->enc_state = ENC_INPUT;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
testing/../xdelta3.c:3092:5: note: here
     case ENC_INPUT:
     ^~~~
testing/../xdelta3.c:3201:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->enc_state = ENC_INSTR;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
testing/../xdelta3.c:3203:5: note: here
     case ENC_INSTR:
     ^~~~
testing/../xdelta3.c:3215:25: warning: this statement may fall through [-Wimplicit-fallthrough=]
       stream->enc_state = ENC_FLUSH;
       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
testing/../xdelta3.c:3217:5: note: here
     case ENC_FLUSH:
     ^~~~
testing/../xdelta3.c:3247:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       if (stream->avail_out > 0)
          ^
testing/../xdelta3.c:3253:5: note: here
     case ENC_POSTOUT:
     ^~~~
xdelta3-main.h:3025:15: warning: statement will never be executed [-Wswitch-unreachable]
            if (1) { case CMD_PRINTHDR:   stream_flags |= XD3_JUST_HDR; }
               ^
xdelta3-main.h:3026:15: warning: this statement may fall through [-Wimplicit-fallthrough=]
       else if (1) { case CMD_PRINTHDRS:  stream_flags |= XD3_SKIP_WINDOW; }
               ^
xdelta3-main.h:3027:21: note: here
       else        { case CMD_PRINTDELTA: stream_flags |= XD3_SKIP_EMIT; }
                     ^~~~
In file included from testing/../xdelta3.c:718,
                 from testing/regtest_c.c:2:
testing/../xdelta3-main.h: In function 'xd3_main_cmdline':
testing/../xdelta3-main.h:3752:18: warning: this statement may fall through [-Wimplicit-fallthrough=]
    option_force2 = 1;
    ~~~~~~~~~~~~~~^~~
testing/../xdelta3-main.h:3758:2: note: here
  case 'v': option_verbose += 1; option_quiet = 0; break;
  ^~~~
testing/../xdelta3-main.h: In function 'main_input':
testing/../xdelta3-main.h:3025:15: warning: statement will never be executed [-Wswitch-unreachable]
            if (1) { case CMD_PRINTHDR:   stream_flags |= XD3_JUST_HDR; }
               ^
testing/../xdelta3-main.h:3026:15: warning: this statement may fall through [-Wimplicit-fallthrough=]
       else if (1) { case CMD_PRINTHDRS:  stream_flags |= XD3_SKIP_WINDOW; }
               ^
testing/../xdelta3-main.h:3027:21: note: here
       else        { case CMD_PRINTDELTA: stream_flags |= XD3_SKIP_EMIT; }
                     ^~~~
In file included from xdelta3.c:267:
xdelta3-main.h: In function 'main_format_rate':
xdelta3-main.h:638:24: warning: '/s' directive output may be truncated writing 2 bytes into a region of size between 1 and 48 [-Wformat-truncation=]
   short_sprintf (*buf, "%s/s", lbuf.buf);
                        ^~~~~~
xdelta3.h:379:43: note: in definition of macro 'short_sprintf'
   snprintf_func((sb).buf,sizeof((sb).buf),fmt,__VA_ARGS__)
                                           ^~~
In file included from /usr/include/stdio.h:873,
                 from xdelta3.h:38,
                 from xdelta3.c:267:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output between 3 and 50 bytes into a destination of size 48
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from xdelta3.c:267:
xdelta3-main.h: In function 'main_format_rate':
xdelta3-main.h:638:24: warning: '/s' directive output may be truncated writing 2 bytes into a region of size between 1 and 48 [-Wformat-truncation=]
   short_sprintf (*buf, "%s/s", lbuf.buf);
                        ^~~~~~
xdelta3.h:379:43: note: in definition of macro 'short_sprintf'
   snprintf_func((sb).buf,sizeof((sb).buf),fmt,__VA_ARGS__)
                                           ^~~
In file included from /usr/include/stdio.h:873,
                 from xdelta3.h:38,
                 from xdelta3.c:267:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output between 3 and 50 bytes into a destination of size 48
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from testing/../xdelta3.c:267,
                 from testing/regtest_c.c:2:
testing/../xdelta3-main.h: In function 'main_format_rate':
testing/../xdelta3-main.h:638:24: warning: '/s' directive output may be truncated writing 2 bytes into a region of size between 1 and 48 [-Wformat-truncation=]
   short_sprintf (*buf, "%s/s", lbuf.buf);
                        ^~~~~~
testing/../xdelta3.h:379:43: note: in definition of macro 'short_sprintf'
   snprintf_func((sb).buf,sizeof((sb).buf),fmt,__VA_ARGS__)
                                           ^~~
In file included from /usr/include/stdio.h:873,
                 from testing/../xdelta3.h:38,
                 from testing/../xdelta3.c:267,
                 from testing/regtest_c.c:2:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output between 3 and 50 bytes into a destination of size 48
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from xdelta3.c:722:
xdelta3-test.h: In function 'test_appheader.isra.113':
xdelta3-test.h:2501:17: warning: '%s' directive output may be truncated writing up to 16383 bytes into a region of size 16374 [-Wformat-truncation=]
    "%s -q -f -A=%s -e -s %s %s %s", program_name, bogus,
                 ^~                                ~~~~~
In file included from /usr/include/stdio.h:873,
                 from xdelta3.h:38,
                 from xdelta3.c:267:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output 20 or more bytes (assuming 19472) into a destination of size 16384
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from xdelta3.c:722:
xdelta3-test.h: In function 'test_compressed_pipe.isra.116':
xdelta3-test.h:2164:63: warning: '%s' directive output may be truncated writing up to 16383 bytes into a region of size between 15349 and 16372 [-Wformat-truncation=]
   snprintf_func (buf, TESTBUFSIZE, "%s %s < %s | %s %s | %s %s%s > %s",
                                                               ^~
xdelta3-test.h:2169:5:
     decomp_buf,
     ~~~~~~~~~~                                                 
In file included from /usr/include/stdio.h:873,
                 from xdelta3.h:38,
                 from xdelta3.c:267:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output 16 or more bytes (assuming 18445) into a destination of size 16384
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from testing/../xdelta3.c:722,
                 from testing/regtest_c.c:2:
testing/../xdelta3-test.h: In function 'test_appheader.isra.122':
testing/../xdelta3-test.h:2501:17: warning: '%s' directive output may be truncated writing up to 16383 bytes into a region of size 16374 [-Wformat-truncation=]
    "%s -q -f -A=%s -e -s %s %s %s", program_name, bogus,
                 ^~                                ~~~~~
In file included from /usr/include/stdio.h:873,
                 from testing/../xdelta3.h:38,
                 from testing/../xdelta3.c:267,
                 from testing/regtest_c.c:2:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output 20 or more bytes (assuming 19472) into a destination of size 16384
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from testing/../xdelta3.c:722,
                 from testing/regtest_c.c:2:
testing/../xdelta3-test.h: In function 'test_compressed_pipe.isra.125':
testing/../xdelta3-test.h:2164:63: warning: '%s' directive output may be truncated writing up to 16383 bytes into a region of size between 15349 and 16372 [-Wformat-truncation=]
   snprintf_func (buf, TESTBUFSIZE, "%s %s < %s | %s %s | %s %s%s > %s",
                                                               ^~
testing/../xdelta3-test.h:2169:5:
     decomp_buf,
     ~~~~~~~~~~                                                 
In file included from /usr/include/stdio.h:873,
                 from testing/../xdelta3.h:38,
                 from testing/../xdelta3.c:267,
                 from testing/regtest_c.c:2:
/usr/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output 16 or more bytes (assuming 18445) into a destination of size 16384
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        __bos (__s), __fmt, __va_arg_pack ());
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~