49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
#include "./misc.h"
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#include "./nativefilestream.h"
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#include <streambuf>
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using namespace std;
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namespace CppUtilities {
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/*!
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* \brief Reads all contents of the specified file in a single call.
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* \throws Throws std::ios_base::failure when an error occurs or the specified \a maxSize
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* would be exceeded.
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* \todo Use std::string_view to pass \a path in v6.
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*/
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std::string readFile(const std::string &path, std::string::size_type maxSize)
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{
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NativeFileStream file;
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file.exceptions(ios_base::failbit | ios_base::badbit);
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file.open(path, ios_base::in | ios_base::binary);
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file.seekg(0, ios_base::end);
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string res;
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const auto size = static_cast<string::size_type>(file.tellg());
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if (maxSize != string::npos && size > maxSize) {
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throw ios_base::failure("File exceeds max size");
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}
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res.reserve(size);
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file.seekg(ios_base::beg);
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res.assign((istreambuf_iterator<char>(file)), istreambuf_iterator<char>());
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return res;
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}
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/*!
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* \brief Writes all \a contents to the specified file in a single call.
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* \throws Throws std::ios_base::failure when an error occurs.
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* \remarks Closing the file manually to prevent flushing the file within the d'tor which
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* would suppress an exception
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*/
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void writeFile(std::string_view path, std::string_view contents)
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{
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NativeFileStream file;
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file.exceptions(ios_base::failbit | ios_base::badbit);
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file.open(path.data(), ios_base::out | ios_base::trunc | ios_base::binary);
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file.write(contents.data(), static_cast<std::streamoff>(contents.size()));
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file.close();
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}
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} // namespace CppUtilities
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