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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2012 Inktank Storage, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <errno.h>
#include "include/util.h"
#include "common/errno.h"
#include "common/strtol.h"
// test if an entire buf is zero in 8-byte chunks
bool buf_is_zero(const char *buf, size_t len)
{
size_t ofs;
int chunk = sizeof(uint64_t);
for (ofs = 0; ofs < len; ofs += sizeof(uint64_t)) {
if (*(uint64_t *)(buf + ofs) != 0) {
return false;
}
}
for (ofs = (len / chunk) * chunk; ofs < len; ofs++) {
if (buf[ofs] != '\0') {
return false;
}
}
return true;
}
int64_t unit_to_bytesize(string val, ostream *pss)
{
if (val.empty()) {
if (pss)
*pss << "value is empty!";
return -EINVAL;
}
char c = val[val.length()-1];
int modifier = 0;
if (!::isdigit(c)) {
if (val.length() < 2) {
if (pss)
*pss << "invalid value: " << val;
return -EINVAL;
}
val = val.substr(0,val.length()-1);
switch (c) {
case 'B':
break;
case 'k':
case 'K':
modifier = 10;
break;
case 'M':
modifier = 20;
break;
case 'G':
modifier = 30;
break;
case 'T':
modifier = 40;
break;
case 'P':
modifier = 50;
break;
case 'E':
modifier = 60;
break;
default:
if (pss)
*pss << "unrecognized modifier '" << c << "'" << std::endl;
return -EINVAL;
}
}
if (val[0] == '+' || val[0] == '-') {
if (pss)
*pss << "expected numerical value, got: " << val;
return -EINVAL;
}
string err;
int64_t r = strict_strtoll(val.c_str(), 10, &err);
if ((r == 0) && !err.empty()) {
if (pss)
*pss << err;
return -1;
}
if (r < 0) {
if (pss)
*pss << "unable to parse positive integer '" << val << "'";
return -1;
}
return (r * (1LL << modifier));
}
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