Resolve modifiers in the character CHAR.
The value is a character with modifiers resolved into the character
code.  Unresolved modifiers are kept in the value.

Return width of CHAR when displayed in the current buffer.
The width is measured by how many columns it occupies on the screen.
Tab is taken to occupy `tab-width' columns.

Return non-nil if OBJECT is a character.

Return a byte value of a character at point.
Optional 1st arg POSITION, if non-nil, is a position of a character to get
a byte value.
Optional 2nd arg STRING, if non-nil, is a string of which first
character is a target to get a byte value.  In this case, POSITION, if
non-nil, is an index of a target character in the string.

If the current buffer (or STRING) is multibyte, and the target
character is not ASCII nor 8-bit character, an error is signaled.

Return the character of the maximum code.

Convert the multibyte character CH to a byte.
If the multibyte character does not represent a byte, return -1.

Return width of STRING when displayed in the current buffer.
Width is measured by how many columns it occupies on the screen.
When calculating width of a multibyte character in STRING,
only the base leading-code is considered; the validity of
the following bytes is not checked.  Tabs in STRING are always
taken to occupy `tab-width' columns.

Convert the byte CH to multibyte character.

Concatenate all the argument bytes and make the result a unibyte string.