Hi,
One should expect that the mapping from groff glyphs to Unicode is device
independent, right? And that glyphuni.cpp represents this mapping?
Comparing font/devhtml/R.proto
font/devutf8/R.proto
src/libs/libgroff/glyphuni.cpp
gives the following differences:
- devhtml maps "hy" and "-" to U+002D.
devutf8 and glyphuni.cpp map "hy" and "-" to U+2010.
- devhtml maps "la" to U+2329, "ra" to U+232A.
devutf8 and glyphuni.cpp map "la" to U+27E8, "ra" to U+27E9.
U+2329..232A are LEFT/RIGHT-POINTING ANGLE BRACKET,
U+27E8..27E9 are MATHEMATICAL LEFT/RIGHT ANGLE BRACKET and were introduced
in Unicode 3.2.
The glyphs are very similar (see http://www.unicode.org/charts/symbols.html
under "Misc. Math Symbols A" and "Miscellaneous Technical").
Why prefer one over the other?
- devhtml and devutf8 map "[" to U+005B.
glyphuni.cpp doesn't.
Why?
- devhtml and devutf8 map "\" to U+005C.
glyphuni.cpp doesn't.
Why?
- devhtml and devutf8 map "]" to U+005D.
glyphuni.cpp doesn't.
Why?
- devhtml and devutf8 map "\`" to U+0060.
glyphuni.cpp doesn't.
Why?
- devhtml and devutf8 map "\'" to U+00B4.
glyphuni.cpp doesn't.
Why?
- glyphuni.cpp maps "shc" to U+00AD.
devhtml and devutf8 don't.
Why?
- devhtml and devutf8 map "+f" to U+03C6 and "*f" to U+03D5.
glyphuni.cpp does the opposite: maps "*f" to U+03C6 and "+f" to U+03D5.
According to the info in the groff_char.7 man page,
"symbol `\[*f]' always denotes the stroked version of phi, and
`\[+f]' the curly variant."
this means that glyphuni.cpp is wrong. I vote for following current
standards.
- devhtml and devutf8 map "\-" to U+2212.
glyphuni.cpp doesn't.
Why?
- devhtml and devutf8 map "sqrt" to U+221A.
glyphuni.cpp doesn't.
Why?
- devhtml and devutf8 map "<<" to U+226A and ">>" to U+226B.
glyphuni.cpp does the opposite: maps ">>" to U+226A and "<<" to U+226B.
IMO glyphuni.cpp is wrong.
Bruno
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