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cutils: add functions for IEC and SI prefixes

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Extract the knowledge of IEC and SI prefixes out of size_to_str and
freq_to_str, so that it can be reused when printing statistics.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-05-25 15:38:48 +02:00
parent 467ef823d8
commit cfb3448922
3 changed files with 95 additions and 9 deletions
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18
include/qemu/cutils.h
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@ -1,6 +1,24 @@
#ifndef QEMU_CUTILS_H
#define QEMU_CUTILS_H
/*
* si_prefix:
* @exp10: exponent of 10, a multiple of 3 between -18 and 18 inclusive.
*
* Return a SI prefix (n, u, m, K, M, etc.) corresponding
* to the given exponent of 10.
*/
const char *si_prefix(unsigned int exp10);
/*
* iec_binary_prefix:
* @exp2: exponent of 2, a multiple of 10 between 0 and 60 inclusive.
*
* Return an IEC binary prefix (Ki, Mi, etc.) corresponding
* to the given exponent of 2.
*/
const char *iec_binary_prefix(unsigned int exp2);
/**
* pstrcpy:
* @buf: buffer to copy string into