| File: | Frameworks/FriBidi Framework/NSString-FBAdditions.m |
| Location: | line 47, column 11 |
| Description: | bad argument |
| 1 | // |
| 2 | // NSString-FBAdditions.m |
| 3 | // FriBidi |
| 4 | // |
| 5 | // Created by Ofri Wolfus on 22/08/06. |
| 6 | // Copyright 2006 Ofri Wolfus. All rights reserved. |
| 7 | // |
| 8 | |
| 9 | #import "NSString-FBAdditions.h" |
| 10 | #import "fribidi.h" |
| 11 | #import "ConvertUTF.h" |
| 12 | |
| 13 | |
| 14 | @implementation NSString (FBAdditions) |
| 15 | |
| 16 | /* |
| 17 | * This method attempts to determine the base writing direction of our string. |
| 18 | * We do this by looping through our characters until we find the first one that knows its writing direction. |
| 19 | * This method will usually get the right direction, unless someone accidentally put a random letter at the |
| 20 | * beginning of the string, which has a different writing direction. |
| 21 | * But since this will be the user's fault, he'll have to deal with it :) |
| 22 | * Anyhow, AppKit also uses this method when displaying bidi text. |
| 23 | */ |
| 24 | - (NSWritingDirection)baseWritingDirection { |
| 25 | unsigned int len = [self length]; |
| 26 | unsigned int i; |
| 27 | FriBidiChar *f, fch; |
| 28 | UTF16 *u, uch; |
| 29 | NSWritingDirection dir = NSWritingDirectionNatural; |
| 30 | |
| 31 | /* |
| 32 | * Loop through all our characters, one by one, until we find one which knows its writing direction. |
| 33 | * Note: If our string begins with lots of universal characters (characters without a direction), this |
| 34 | * could get very inefficient. |
| 35 | */ |
[1] Loop condition is true. Entering loop body. | |
| 36 | for (i = 0U; i < len; i++) { |
| 37 | FriBidiCharType type; |
| 38 | |
| 39 | // Get a single character |
| 40 | uch = (UTF16)CFStringGetCharacterAtIndex((CFStringRef)self, i); |
| 41 | u = &uch; |
| 42 | f = &fch; |
| 43 | |
| 44 | // Convert our UniChar (which is UTF16) to FriBidiChar (which is UTF32) |
[2] Taking true branch. | |
| 45 | if (ConvertUTF16toUTF32((const UTF16**)&u, (u + 1), &f, (f + 1), lenientConversion) == conversionOK) { |
| 46 | // Get the type of our character |
[3] Pass-by-value argument in function is undefined. | |
| 47 | type = fribidi_get_type(fch); |
| 48 | |
| 49 | // LTR char? |
| 50 | if (type == FRIBIDI_TYPE_LTR( 0x00000010L + 0x00000100L )) { |
| 51 | dir = NSWritingDirectionLeftToRight; |
| 52 | break; |
| 53 | } |
| 54 | |
| 55 | // RTL char? |
| 56 | if (type == FRIBIDI_TYPE_RTL( 0x00000010L + 0x00000100L + 0x00000001L )) { |
| 57 | dir = NSWritingDirectionRightToLeft; |
| 58 | break; |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | return dir; |
| 64 | } |
| 65 | |
| 66 | @end |