NSTask string encoding problem
In my program, I'm grep-ing via NSTask. For some reason, sometimes I would get no results (even thoug开发者_开发技巧h the code was apparently the same as the command run from the CLI which worked just fine), so I checked through my code and found, in Apple's documentation, that when adding arguments to an NSTask object, "the NSTask object converts both path and the strings in arguments to appropriate C-style strings (using fileSystemRepresentation) before passing them to the task via argv[]" (snip).
The problem is that I might grep terms like "Río Gallegos". Sadly (as I checked with fileSystemRepresentation), that undergoes the conversion and turns out to be "RiÃÅo Gallegos".
How can I solve this?
-- Ry
The problem is that I might grep terms like "Río Gallegos". Sadly (as I checked with fileSystemRepresentation), that undergoes the conversion and turns out to be "RiÃÅo Gallegos".
That's one possible interpretation. What you mean is that “Río Gallegos” gets converted to “Ri\xcc\x81
o Gallegos”—the UTF-8 bytes to represent the decomposed i + combining acute accent.
Your problem is that grep is not interpreting these bytes as UTF-8. grep is using some other encoding—apparently, MacRoman.
The solution is to tell grep to use UTF-8. That requires setting the LC_ALL
variable in your grep task's environment.
The quick and dirty value to use would be “en_US.UTF-8”; a more proper way would be to get the language code for the user's primary preferred language, replace the hyphen, if any, with an underscore, and stick “.UTF-8” on the end of that.
精彩评论