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Just integers right now. And only big or little endian.

Rename len() method to length() to align with std::string.

Does this fix the FreeBSD/clang build?

This was necessary to get to build for MSVC2019 and GCC 8.3.0

(e.g. those stored in files, e.g. EXITINFO.BBS).

Now correctly rejects UTF-8 encoded Unicode surrogates and does not support
5 and 6 byte UTF-8 encodings.

For reference:
https://github.com/openssl/openssl/commit/ba64e5a92a6f009e311ad1c3565817820a1632a4

These functions can be used for "percent encode/decode" or any other 2-hex-digit encoding/decoding with a single escape character.

Hopefully not introducing any bugs in the process.

Hopefully not introducing any bugs in the process.

To be fair, this is all weird.

Because the test to continue is *after* the loop, we can't continue
when c is the last index into lzh->son, or the code will make use of
lzh->son[sizeof(lzh->son)/sizeof(lzh->son[0])] which is outside the bounds
of the array.

Replaced unicode_is_zerowidth() with unicode_width(), in preparation for
"fullwidth" char support.
Added UNICODE_UNDEFINED definition (0x0000)
(UNICODE_NULL is already defined, at least in MSVC).

utf8.c: In function 'utf8_getc':
utf8.c:327:7: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
     } else
       ^~~~
utf8.c:329:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
  if(val != NULL) {
  ^~

New function (derived from sbbs_t::utf8_to_cp437()): unicode_to_cp437()
New utf8 functions: utf8_replace_chars(), utf8_str_is_valid().
utf8_getc() enhancement: val arg may be NULL (for length/validation uses).

UNICODE -> CP437 conversions (no string/memory compares needed), so
cp437_utf8_tbl.* is being replaced by cp437_unicode_tbl.*.

Added utf8 module which includes:
- utf8_normalize_str() - normalize US-ASCIIZ string, from mailsrvr.c
- utf8_putc() - encoder / length calculator
- utf8_getc() - decoder

The latter 2 were swiped from OpenSSL's a_utf8.c.

You will need to perform a clean rebuild.

You'll need to perform a clean build.