Re: [PATCH 3/6] Make diff -w handle trailing-spaces on incomplete lines.

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Thell Fowler (git@xxxxxxxxxxxxx) wrote on Aug 19, 2009:

>   - When processing trailing spaces with --ignore-all-space a diff
>     would be found whenever one side had 0 spaces and either (or both)
>     sides was an incomplete line.  xdl_recmatch should process the
>     full length of the record instead of assuming both sides have a
>     terminator.
> 
> @@ -191,14 +191,14 @@ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
>  	int i1, i2;
>  
>  	if (flags & XDF_IGNORE_WHITESPACE) {
> -		for (i1 = i2 = 0; i1 < s1 && i2 < s2; ) {
> +		for (i1 = i2 = 0; i1 <= s1 && i2 <= s2; ) {
>  			if (isspace(l1[i1]))
> -				while (isspace(l1[i1]) && i1 < s1)
> +				while (isspace(l1[i1]) && i1 <= s1)

The change from '<' to <=' obviously did do jack-diddly-squat, which I 
should have noticed earlier.

>  					i1++;
>  			if (isspace(l2[i2]))
> -				while (isspace(l2[i2]) && i2 < s2)
> +				while (isspace(l2[i2]) && i2 <= s2)

Here too.

>  					i2++;
> -			if (i1 < s1 && i2 < s2 && l1[i1++] != l2[i2++])
> +			if (i1 <= s1 && i2 <= s2 && l1[i1++] != l2[i2++])
>  				return 0;
>  		}
>  		return (i1 >= s1 && i2 >= s2);
> 


Those will be corrected for v2.

-- 
Thell
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