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48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
// Copyright (c) 2015-2020 The Bitcoin Core developers
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// Copyright (c) 2017 The Zcash developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <fs.h>
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#include <limits>
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#include <stdio.h>
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#include <string>
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#include <utility>
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std::pair<bool,std::string> ReadBinaryFile(const fs::path &filename, size_t maxsize=std::numeric_limits<size_t>::max())
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{
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FILE *f = fsbridge::fopen(filename, "rb");
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if (f == nullptr)
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return std::make_pair(false,"");
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std::string retval;
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char buffer[128];
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do {
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const size_t n = fread(buffer, 1, sizeof(buffer), f);
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// Check for reading errors so we don't return any data if we couldn't
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// read the entire file (or up to maxsize)
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if (ferror(f)) {
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fclose(f);
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return std::make_pair(false,"");
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}
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retval.append(buffer, buffer+n);
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} while (!feof(f) && retval.size() <= maxsize);
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fclose(f);
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return std::make_pair(true,retval);
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}
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bool WriteBinaryFile(const fs::path &filename, const std::string &data)
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{
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FILE *f = fsbridge::fopen(filename, "wb");
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if (f == nullptr)
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return false;
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if (fwrite(data.data(), 1, data.size(), f) != data.size()) {
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fclose(f);
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return false;
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}
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if (fclose(f) != 0) {
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return false;
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}
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return true;
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}
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