Ian Campbell writes ("Re: [Xen-devel] [PATCH 2/9] libxl: disks: new
xlu_disk_parse function"):
> On Thu, 2011-06-02 at 18:55 +0100, Ian Jackson wrote:
> > +/* Sets ->format from the string. IDL should provide something for this.
> > */
>
> (please imagine a thunderclap and cloud of smoke here...)
:-).
> I'm not sure if we need to be more flexible, e.g. allow output in both
> upper and lower case, accept - where the name has _ etc.
Those would all be nice to have :-). But I don't think they're that
important.
> +def libxl_C_enum_from_string(ty, str, e, indent = " "):
> + s = ""
> + s += "static struct { const char *s; %s v; } lookup[] = {\n" %
> ty.typename
> + for v in ty.values:
> + s += " { \"%s\", %s },\n" % (v.valuename.lower(), v.name)
> + s += "};\n"
> + s += "int i;\n"
> + s += "\n"
> + s += "for (i=0; i<(sizeof(lookup)/sizeof(lookup[0])); i++) {\n"
> + s += " if (!strcasecmp(lookup[i].s, %s)) {\n" % (str)
> + s += " %s = lookup[i].v;\n" % (e)
> + s += " return 0;\n"
> + s += " }\n"
> + s += "}\n"
> + s += "return -1;\n"
This is a bit mad, isn't it ? I mean, we could have a
non-autogenerated "lookup string from table" function and only
autogenerate the tables. I think that's a nicer interface for
callers, too - for example, they can print a list of options if they
want to, etc.
Ian.
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