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[base, thin_ls] factor out disk_units code

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This commit is contained in:
Joe Thornber
2016-01-19 11:40:00 +00:00
parent 47bd31da8d
commit 7ce4e451ff
4 changed files with 113 additions and 80 deletions
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86
thin-provisioning/thin_ls.cc
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@@ -21,16 +21,18 @@
#include <getopt.h>
#include <libgen.h>
#include "human_readable_format.h"
#include "metadata_dumper.h"
#include "metadata.h"
#include "xml_format.h"
#include "base/disk_units.h"
#include "thin-provisioning/human_readable_format.h"
#include "thin-provisioning/metadata_dumper.h"
#include "thin-provisioning/metadata.h"
#include "thin-provisioning/xml_format.h"
#include "version.h"
#include "thin-provisioning/commands.h"
#include "persistent-data/file_utils.h"
#include "boost/optional.hpp"
#include "boost/lexical_cast.hpp"
using namespace base;
using namespace boost;
using namespace persistent_data;
using namespace std;
@@ -41,82 +43,6 @@ using namespace thin_provisioning;
namespace {
enum disk_unit {
UNIT_BYTE,
UNIT_SECTOR,
// decimal multipliers
UNIT_kB,
UNIT_MB,
UNIT_GB,
UNIT_TB,
UNIT_PB,
// binary mulitpliers
UNIT_KiB,
UNIT_MiB,
UNIT_GiB,
UNIT_TiB,
UNIT_PiB
};
unsigned long long disk_unit_multiplier(disk_unit u) {
switch (u) {
case UNIT_BYTE:
return 1;
case UNIT_SECTOR:
return 512;
case UNIT_kB:
return 1000;
case UNIT_MB:
return 1000000;
case UNIT_GB:
return 1000000000ull;
case UNIT_TB:
return 1000000000000ull;
case UNIT_PB:
return 1000000000000000ull;
case UNIT_KiB:
return 1024ull;
case UNIT_MiB:
return 1024ull * 1024ull;
case UNIT_GiB:
return 1024ull * 1024ull * 1024ull;
case UNIT_TiB:
return 1024ull * 1024ull * 1024ull * 1024ull;
case UNIT_PiB:
return 1024ull * 1024ull * 1024ull * 1024ull * 1024ull;
}
throw runtime_error("unknown unit type");
return 1;
}
string format_disk_unit(unsigned long long numerator, disk_unit u) {
numerator *= disk_unit_multiplier(u);
unsigned i;
for (i = 0; numerator >= 1024; i++)
numerator /= 1024;
char const *extensions[] = {
"", "KiB", "MiB", "GiB", "TiB", "PiB"
};
// FIXME: check subscript of i
return lexical_cast<string>(numerator) + " " + extensions[i];
}
//------------------------------------------------
// FIXME: move to own file