On 03/13/2013 04:51 PM, Eric Blake wrote:
On 03/12/2013 09:09 PM, Joel Schopp wrote:
Implement an input visitor for ASN.1 BER encoding.
Cc: Michael Tsirkin <m...@redhat.com>
Signed-off-by: Stefan Berger <stef...@linux.vnet.ibm.com>
Signed-off-by: Joel Schopp <jsch...@linux.vnet.ibm.com>
---
include/qapi/ber-input-visitor.h | 30 ++
qapi/Makefile.objs | 2 +-
qapi/ber-input-visitor.c | 1073 ++++++++++++++++++++++++++++++++++++++
3 files changed, 1104 insertions(+), 1 deletion(-)
create mode 100644 include/qapi/ber-input-visitor.h
create mode 100644 qapi/ber-input-visitor.c
diff --git a/include/qapi/ber-input-visitor.h b/include/qapi/ber-input-visitor.h
new file mode 100644
index 0000000..eaa3d0e
--- /dev/null
+++ b/include/qapi/ber-input-visitor.h
@@ -0,0 +1,30 @@
+/*
+ * BER Input Visitor header
+ *
+ * Copyright IBM, Corp. 2011
It's 2013
+static void ber_input_type_number(Visitor *v, double *obj, const char *name,
+ Error **errp)
+{
+ BERInputVisitor *aiv = to_biv(v);
+ uint32_t ber_type_tag;
+ uint8_t ber_type_flags;
+ uint32_t len;
+ bool is_indefinite;
+ char buf[128], buf2[128];
+ GDoubleIEEE754 num;
+ struct ieee754_buffer number;
+ size_t to_read;
+
+ switch (number.first) {
+ case 0x42:
+ *obj = nan("NAN");
+ break;
+ case 0x41:
+ case 0x40:
+ num.mpn.sign = ((number.first & 0x1) != 0);
+ num.mpn.biased_exponent = ~0;
+ num.mpn.mantissa_low = 0;
+ num.mpn.mantissa_high = 0;
+ *obj = num.v_double;
Is this really portable enough? In other words, do we really require
that qemu only compiles on platforms where double is in IEEE format?
Good question. I don't know in what format the other platforms are,
though. I know it's used on i386, x86_64, ppc, ppc64. My guess is that
it would have to be a really exotic CPU to not use this standard.
I hope this applies to ARM in general...
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0067d/Cihgejjg.html
Regards,
Stefan
Stefan
