-NOTES:
-NOTES:
- 37 (base 8) = 31 (base 10) (LAST CONTROL CHAR)
- 40 (base 8) = 32 (base 10) (FIRST PRINTABLE ASCII)
- 176 (base 8) = 126 (base 10) (LAST PRINTABLE ASCII)
- 177 (base 8) = 127 (base 10) (DEL)
- 200 (base 8) = 128 (base 10)
- 237 (base 8) = 159 (base 10)
- 240 (base 8) = 160 (base 10) (FIRST EXTRA PRINTABLE)
- 377 (base 8) = 255 (base 10) (LAST EXTRA PRINTABLE)
- 400 (base 8) = 256 (base 10)
-
- Traditional ASCII 0 - 127 (octal 0 - 177)
- Printable ASCII 32 - 126 (octal 40 - 176)
- Additional Printables for ISO Latin 1 160 - 255 (octal 240 - 377)
-
- 240 (160) is the first character of the extra 7-bit printable characer
- range, sometimes used as the no-break space, but the regular expression
- ranges are broken up at 240 only because RH 7.2 PHP seemed to have
- problems otherwise - this is a PHP/preg issue, NOT a charset issue
-
- So supposedly printable chars in an 8859 charset are 32-126 (octal 40-176)
- and 160/161-255 (octal 240/241-377))
-
- So checking for the range between the two makes sense (128-159 or octal 200-237)
- (wait, no, to skip DEL too, it's 127-159 (octal 177-237))
-
- But why not for 0-31 (octal 0-37) and DEL (127 or 177 octal)????
- (or do we need a new fxn that detects *printable* 7-bit chars?)
- (if we do, note that some control characters are "printable",
- notably the CR, LF and TAB characters)
-
- And why is 241-377 octal considered 8-bit for iso 8859??? Isn't it
- the opposite for iso 8859???? aren't these 7 bit characters?
- see http://www.cs.tut.fi/~jkorpela/chars.html#latin1
- Uh, well, anything more than 127 (octal 177) takes 8 bits to represent
- but errrrr, these are simple non-multibyte characters, right? but
- maybe this "is 8-bit" business is NOT the same as "is multibyte"????
-
- That begs the question how this fxn is actually used - what's its purpose?
- (is it being misused in some places?)
-