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is miscalculated in multibyte/wide character mode


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add multibyte character support, plus a few tweaks of mine


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check_operating_dir() to make it use boolean values (plus a few more
boolean-related tweaks of mine); also stop wrapping the bad_chr
parameter of parse_mbchar() in #ifdefs for cleanliness, as the
allow_tabcomp parameter of check_operating_dir() isn't wrapped in
#ifdefs, and don't set bad_chr to TRUE when we get a null byte in a
multibyte string, as it's not an invalid multibyte character


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plus a few tweaks of mine


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increase efficiency and support multibyte characters; also add a few
miscellaneous tweaks of mine


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when totsize was converted to hold the total number of multibyte
characters


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home" routines to use it (since it returns the number of bytes taken up
by spacing characters at the beginning of the line), and rearrange a few
initializations near asserts


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size_t, store the number of multibyte characters instead of the number
of single-byte characters in totsize, and add a few formatting fixes


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the versions that take length arguments, add multibyte equivalent of
strlen(), and fix potential segfault in mbstrnlen()


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selections, and add a few cosmetic tweaks


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