20210715.151551.e7ad03a: -Wstringop-overflow compile time warnings

[kloczek]

gcc 11.1.1

/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/main.cpp: In function 'int real_main(int, char**)':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/main.cpp:3800:26: warning: '*' in boolean context, suggest '&&' instead [-Wint-in-bool-context]
 3800 |             sizeof(char) * set_UTF16_text
      |             ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp: In function 'void APar_freefree(int)':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp:2188:9: warning: variable 'prev_atom' set but not used [-Wunused-but-set-variable]
 2188 |   short prev_atom = 0;
      |         ^~~~~~~~~
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp: In function 'uint64_t APar_QuickSumAtomicLengths(AtomicInfo*)':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp:4041:9: warning: variable 'current_level' set but not used [-Wunused-but-set-variable]
 4041 |   short current_level = 0;
      |         ^~~~~~~~~~~~~
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp: In function 'bool APar_Readjust_iloc_atom(short int)':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp:4188:18: warning: variable 'this_extent_offset' set but not used [-Wunused-but-set-variable]
 4188 |         uint64_t this_extent_offset = 0;
      |                  ^~~~~~~~~~~~~~~~~~
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp: In function 'void APar_DetermineAtomLengths()':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/parsley.cpp:5186:11: warning: variable 'previous_atom' set but not used [-Wunused-but-set-variable]
 5186 |     short previous_atom = 0; // only gets used in testing for atom under stsd
      |           ^~~~~~~~~~~~~
In function 'APar_UnpackLanguage',
    inlined from 'APar_Print_single_userdata_atomcontents' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1158:24:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp: In function 'APar_Print_single_userdata_atomcontents':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:981:17: note: at offset 3 into destination object 'unpacked_lang' of size 3
  981 |   unsigned char unpacked_lang[3];
      |                 ^
In function 'APar_UnpackLanguage',
    inlined from 'APar_Print_single_userdata_atomcontents' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1058:24:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp: In function 'APar_Print_single_userdata_atomcontents':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:981:17: note: at offset 3 into destination object 'unpacked_lang' of size 3
  981 |   unsigned char unpacked_lang[3];
      |                 ^
In function 'APar_UnpackLanguage',
    inlined from 'APar_Print_single_userdata_atomcontents' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1110:24:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp: In function 'APar_Print_single_userdata_atomcontents':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:981:17: note: at offset 3 into destination object 'unpacked_lang' of size 3
  981 |   unsigned char unpacked_lang[3];
      |                 ^
In function 'APar_UnpackLanguage',
    inlined from 'APar_Print_single_userdata_atomcontents' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1090:24:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp: In function 'APar_Print_single_userdata_atomcontents':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:981:17: note: at offset 3 into destination object 'unpacked_lang' of size 3
  981 |   unsigned char unpacked_lang[3];
      |                 ^
In function 'APar_UnpackLanguage',
    inlined from 'APar_Print_single_userdata_atomcontents' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1002:24:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp: In function 'APar_Print_single_userdata_atomcontents':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:981:17: note: at offset 3 into destination object 'unpacked_lang' of size 3
  981 |   unsigned char unpacked_lang[3];
      |                 ^
In function 'APar_UnpackLanguage',
    inlined from 'APar_Print_ID3v2_tags' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1412:22,
    inlined from 'APar_Print_metachild_atomcontents' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1760:26,
    inlined from '_Z22APar_PrintMetaChildrenP10AtomicInfoS0_b.part.0.isra' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1774:44:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp: In function '_Z22APar_PrintMetaChildrenP10AtomicInfoS0_b.part.0.isra':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:1411:17: note: at offset 3 into destination object 'unpacked_lang' of size 3
 1411 |   unsigned char unpacked_lang[3];
      |                 ^
In function 'APar_UnpackLanguage',
    inlined from 'APar_PrintAtomicTree' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:2015:26,
    inlined from 'real_main' at /home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/main.cpp:1631:27:
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/util.cpp:394:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  394 |   lang_code[3] = 0;
      |                ^
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/main.cpp: In function 'real_main':
/home/tkloczko/rpmbuild/BUILD/atomicparsley-20210715.151551.e7ad03a/src/metalist.cpp:2014:21: note: at offset 3 into destination object 'unpacked_lang' of size 3
 2014 |       unsigned char unpacked_lang[3];
      |                     ^