CODEWITHSUNDEEP
c++objective-cunicodensstringunicode-string
Sankalp
Sankalp

Reputation: 2824

Error converting NSString to C-String

I am trying to convert NSString to C-String` using the following call:

NSString* path = ...
const char* str = [path cStringUsingEncoding: NSUTF16StringEncoding];

The path contains a file path. But, I am getting str as just "/". When I use this call instead:

const char* str = [path UTF8String];

The returned str is fine i.e. I get the required path as a c-string. But, I need to make sure that the conversion works in all cases regardless of the the type encoding used in the path i.e. I want to take care of unicode characters. And for that I need to use the initial call.

What mistake am I making?

Upvotes: 1

Views: 252

Answers (2)

Raon
Raon

Reputation: 1286

You should try using UTF8 encoding this '\' you get will be the first of the NSString...in c each char takes 1 byte (8bits) but UTF16 makes characters 2 bytes long.. and so the error occurs

Upvotes: 0

trojanfoe
trojanfoe

Reputation: 122401

It's because of the encoding you chose. UTF-16 will return the characters in 16-bit and you are expecting 8-bit characters (i.e. UTF-8).

So if the path starts with /, that will be returned as 0x2F00 (assuming little-endian encoding) and the 00 sequence will look end of string.

Upvotes: 3

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