Re: src/util.cpp substitute semantics ?

Hi Robbe,

You are right. I'll include your patch.

Regards,
   Dimitri

On 16 okt 2008, at 05:16, Robbie Gates wrote:

> Hi All,
>
>  it looks to me like the reimplemented subsitute in src/util.cpp in
> the 1.5.7.1 release has different semantics to the original when
> passed a null string (i.e. 0 ptr) for the dst argument. It now returns
> the string unchanged, whereas previously it treated it as if dst was
> the empty string. The patch below restores the old behaviour. It's a
> bit of a hack, but its as local a change as i could make.
>
>  I noticed this because our header.html uses relpath, and the
> relativePathToRoot function in src/util.cpp returns a null string,
> rather than an empty string, when the relative path is empty.
>
>  Hope this helps,
>
> - robbie
>
> @@ -4447,10 +4447,10 @@
>
> QCString substitute(const char *s,const char *src,const char *dst)
> {
> -  if (s==0 || src==0 || dst==0) return s;
> +  if (s==0 || src==0) return s;
>   const char *p, *q;
>   int srcLen = strlen(src);
> -  int dstLen = strlen(dst);
> +  int dstLen = dst ? strlen(dst) : 0;
>   int resLen;
>   if (srcLen!=dstLen)
>   {
> @@ -4469,7 +4469,10 @@
>     int l = (int)(q-p);
>     memcpy(r,p,l);
>     r+=l;
> -    memcpy(r,dst,dstLen);
> +    if (dst)
> +    {
> +      memcpy(r,dst,dstLen);
> +    }
>     r+=dstLen;
>   }
>   strcpy(r,p);
>
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