qemu_strtod

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Auditing callers, we have no external callers of qemu_strtod, and
among the callers of qemu_strtod_finite:

- qapi/qobject-input-visitor.c:qobject_input_type_number_keyval() and
  qapi/string-input-visitor.c:parse_type_number() which reject all
  errors (does not matter what we store)

- utils/cutils.c:do_strtosz() incorrectly assumes that *endptr points
  to '.' on all failures (that is, it is not distinguishing between
  EINVAL and ERANGE; and therefore still does the WRONG THING for
  "9.9e999".  The change here does not fix that (a later patch will
  tackle this more systematically), but at least the value of endptr
  is less likely to be out of bounds on overflow

- our testsuite, which we can update to match what we document


Thanks and Regards

Deepanshu Garg

https://www.abrasivegrit.in/product/silicon-carbide

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<div dir=3D"ltr"><pre style=3D"color:rgb(0,0,0)">Auditing callers, we have =
no external callers of qemu_strtod, and
among the callers of qemu_strtod_finite:

- qapi/qobject-input-visitor.c:qobject_input_type_number_keyval() and
  qapi/string-input-visitor.c:parse_type_number() which reject all
  errors (does not matter what we store)

- utils/cutils.c:do_strtosz() incorrectly assumes that *endptr points
  to &#39;.&#39; on all failures (that is, it is not distinguishing between
  EINVAL and ERANGE; and therefore still does the WRONG THING for
  &quot;9.9e999&quot;.  The change here does not fix that (a later patch wi=
ll
  tackle this more systematically), but at least the value of endptr
  is less likely to be out of bounds on overflow

- our testsuite, which we can update to match what we document</pre><pre st=
yle=3D"color:rgb(0,0,0)"><br></pre><pre style=3D"color:rgb(0,0,0)">Thanks a=
nd Regards </pre><pre style=3D"color:rgb(0,0,0)">Deepanshu Garg </pre><pre =
style=3D"color:rgb(0,0,0)"><a href=3D"https://www.abrasivegrit.in/product/s=
ilicon-carbide">https://www.abrasivegrit.in/product/silicon-carbide</a></pr=
e></div>

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