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LSST Data Management Base Package
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Utils.cc
Go to the documentation of this file.
1// -*- lsst-c++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2008, 2009, 2010 LSST Corporation.
6 *
7 * This product includes software developed by the
8 * LSST Project (http://www.lsst.org/).
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the LSST License Statement and
21 * the GNU General Public License along with this program. If not,
22 * see <http://www.lsstcorp.org/LegalNotices/>.
23 */
24
25//
26//##====---------------- ----------------====##/
27//
28// Support for formatters
29//
30//##====---------------- ----------------====##/
31
32#include <cstdint>
33#include <iostream>
34
36
37using std::int64_t;
38
39namespace lsst {
40namespace afw {
41namespace formatters {
42
43ndarray::Array<std::uint8_t, 1, 1> stringToBytes(std::string const& str) {
44 auto nbytes = str.size() * sizeof(char) / sizeof(std::uint8_t);
45 std::uint8_t const* byteCArr = reinterpret_cast<std::uint8_t const*>(str.data());
46 auto shape = ndarray::makeVector(nbytes);
47 auto strides = ndarray::makeVector(1);
48 // Make an Array that shares memory with `str` (and does not free that memory when destroyed),
49 // then return a copy; this is simpler than manually copying the data into a newly allocated array
50 ndarray::Array<std::uint8_t const, 1, 1> localArray = ndarray::external(byteCArr, shape, strides);
51 return ndarray::copy(localArray);
52}
53
54std::string bytesToString(ndarray::Array<std::uint8_t const, 1, 1> const& bytes) {
55 auto nchars = bytes.size() * sizeof(std::uint8_t) / sizeof(char);
56 char const* charCArr = reinterpret_cast<char const*>(bytes.getData());
57 return std::string(charCArr, nchars);
58}
59
60} // namespace formatters
61} // namespace afw
62} // namespace lsst
table::Key< table::Array< std::uint8_t > > bytes
Definition python.h:135
ndarray::Array< std::uint8_t, 1, 1 > stringToBytes(std::string const &str)
Encode a std::string as a vector of uint8.
Definition Utils.cc:43
std::string bytesToString(ndarray::Array< std::uint8_t const, 1, 1 > const &bytes)
Decode a std::string from a vector of uint8 returned by stringToBytes.
Definition Utils.cc:54
T size(T... args)