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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <inttypes.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string>
#include "utils.h"
int Round(int n) {
int base = 1;
while (base*10 < n) {
base *= 10;
}
if (n < 2*base) {
return 2*base;
}
if (n < 5*base) {
return 5*base;
}
return 10*base;
}
// Similar to the code in art, but supporting both binary and decimal prefixes.
std::string PrettyInt(long value, size_t base) {
if (base != 2 && base != 10) abort();
uint64_t count = static_cast<uint64_t>(value);
bool negative_number = false;
if (value < 0) {
negative_number = true;
count = static_cast<uint64_t>(-value);
}
// The byte thresholds at which we display amounts. A count is displayed
// in unit U when kUnitThresholds[U] <= bytes < kUnitThresholds[U+1].
static const uint64_t kUnitThresholds2[] = {
1024*1024*1024 /* Gi */, 2*1024*1024 /* Mi */, 3*1024 /* Ki */, 0,
};
static const uint64_t kUnitThresholds10[] = {
1000*1000*1000 /* G */, 2*1000*1000 /* M */, 3*1000 /* k */, 0,
};
static const uint64_t kAmountPerUnit2[] = { 1024*1024*1024, 1024*1024, 1024, 1 };
static const uint64_t kAmountPerUnit10[] = { 1000*1000*1000, 1000*1000, 1000, 1 };
static const char* const kUnitStrings2[] = { "Gi", "Mi", "Ki", "" };
static const char* const kUnitStrings10[] = { "G", "M", "k", "" };
// Which set are we using?
const uint64_t* kUnitThresholds = ((base == 2) ? kUnitThresholds2 : kUnitThresholds10);
const uint64_t* kAmountPerUnit = ((base == 2) ? kAmountPerUnit2 : kAmountPerUnit10);
const char* const* kUnitStrings = ((base == 2) ? kUnitStrings2 : kUnitStrings10);
size_t i = 0;
for (; kUnitThresholds[i] != 0; ++i) {
if (count >= kUnitThresholds[i]) {
break;
}
}
char* s = NULL;
asprintf(&s, "%s%" PRId64 "%s", (negative_number ? "-" : ""),
count / kAmountPerUnit[i], kUnitStrings[i]);
std::string result(s);
free(s);
return result;
}
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