On 10/08/2010 05:48 PM, Stefan Hajnoczi wrote:
From: Anthony Liguori<aligu...@us.ibm.com>This common function converts byte counts to human-readable strings with proper units. Signed-off-by: Anthony Liguori<aligu...@us.ibm.com> Signed-off-by: Stefan Hajnoczi<stefa...@linux.vnet.ibm.com> --- cutils.c | 15 +++++++++++++++ qemu-common.h | 1 + 2 files changed, 16 insertions(+), 0 deletions(-) diff --git a/cutils.c b/cutils.c index 6c32198..5041203 100644 --- a/cutils.c +++ b/cutils.c @@ -301,3 +301,18 @@ int get_bits_from_size(size_t size) return __builtin_ctzl(size); #endif } + +void bytes_to_str(char *buffer, size_t buffer_len, uint64_t size) +{ + if (size< (1ULL<< 10)) { + snprintf(buffer, buffer_len, "%" PRIu64 " byte(s)", size); + } else if (size< (1ULL<< 20)) { + snprintf(buffer, buffer_len, "%" PRIu64 " KB(s)", size>> 10); + } else if (size< (1ULL<< 30)) { + snprintf(buffer, buffer_len, "%" PRIu64 " MB(s)", size>> 20); + } else if (size< (1ULL<< 40)) { + snprintf(buffer, buffer_len, "%" PRIu64 " GB(s)", size>> 30); + } else { + snprintf(buffer, buffer_len, "%" PRIu64 " TB(s)", size>> 40); + } +}
This will show 1.5GB as 1GB. Need either floating point with a couple of digits of precision, or show 1.5GB as 1500MB.
It also misuses SI prefixes. 1 GB means 10^9 bytes, not 2^30 bytes (with a common exception for RAM which is usually packaged in 1.125 times some power of two).
-- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.
