[Qemu-devel] Re: [PATCH 03/29] Introduce QString

[Paolo Bonzini]

On 08/20/2009 01:07 AM, Luiz Capitulino wrote:
> QString is a high-level data type that can be used to store C
> strings.
>
> The following functions are available:
>
> - qstring_from_str() Create a new QString from a C string
> - qstring_get_str()  Return a pointer to the stored string
>
> Note that qstring_get_str() is too low-level for a data type like
> this, but it's interesting for quick read-only accesses.

Same comments as for qint.h.

Maybe add qstring_dup_str, doing strdup(qstring_get_str(x))?

> +    qstring = qemu_malloc(sizeof(*qstring));
> +    qstring->string = qemu_strdup(str);
> +    QOBJECT_INIT(qstring, &qstring_type);

Since this is immutable, what about allocating the bytes straight after 
the QType_HEAD, without going through an additional indirection?

Another useful thingy could be to cache the length, since you have to 
compute it anyway to allocate the QString.  I'm just shooting around 
ideas, feel free to not implement them if they are not useful in the 
remainder of the series. :-)

Paolo