Convert our code base to adhere to Linux kernel coding style using
Lindent, with the following exceptions:
* Use spaces, instead of tabs, for indentation.
* Use 2-character indentations (instead of 8 characters).
Rationale: We currently have too much levels of indentation. Using
8-character tabs would make huge code parts unreadable. These need to be
cleaned up before we can switch to 8 characters.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Sort character width lookup table by character ranges.
* Use binary search instead of linear search for UTF-8 character width
lookups which will speed up utf8_width() (O(log n) instead of O(n)).
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
Add utf8_width() and utf8_strwidth() which can be used to calculate the
display width of a single character or a string, respectively. A lookup
table is used to spot double width characters, as well as composing
characters. There currently isn't any code to deal with ambigious
characters.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
