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// Copyright (c) 2015-2022 The Bitcoin Core developers
// Copyright (c) 2017 The Zcash developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <util/readwritefile.h>
#include <util/fs.h>
#include <algorithm>
#include <cstdio>
#include <limits>
#include <string>
#include <utility>
std::pair<bool,std::string> ReadBinaryFile(const fs::path &filename, size_t maxsize)
{
FILE *f = fsbridge::fopen(filename, "rb");
if (f == nullptr)
return std::make_pair(false,"");
std::string retval;
char buffer[128];
do {
const size_t n = fread(buffer, 1, std::min(sizeof(buffer), maxsize - retval.size()), f);
// Check for reading errors so we don't return any data if we couldn't
// read the entire file (or up to maxsize)
if (ferror(f)) {
fclose(f);
return std::make_pair(false,"");
}
retval.append(buffer, buffer+n);
} while (!feof(f) && retval.size() < maxsize);
fclose(f);
return std::make_pair(true,retval);
}
bool WriteBinaryFile(const fs::path &filename, const std::string &data)
{
FILE *f = fsbridge::fopen(filename, "wb");
if (f == nullptr)
return false;
if (fwrite(data.data(), 1, data.size(), f) != data.size()) {
fclose(f);
return false;
}
if (fclose(f) != 0) {
return false;
}
return true;
}
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