C++ Utilities: io/misc.cpp Source File

C++ Utilities 5.32.1 Useful C++ classes and routines such as argument parser, IO and conversion utilities

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misc.cpp
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1#define CPP_UTILITIES_IOMISC_STRING_VIEW
2
3#include "./misc.h"
4#include "./nativefilestream.h"
5
6#include <iterator>
7
8using namespace std;
9
10namespace CppUtilities {
11
17std::string readFile(const std::string &path, std::string::size_type maxSize)
18{
19 auto file = NativeFileStream();
20 file.exceptions(ios_base::failbit | ios_base::badbit);
21 file.open(path, ios_base::in | ios_base::binary);
22 file.seekg(0, ios_base::end);
23 string res;
24 const auto size = static_cast<string::size_type>(file.tellg());
25 if (maxSize != string::npos && size > maxSize) {
26 throw ios_base::failure("File exceeds max size");
27 }
28 res.reserve(size);
29 file.seekg(ios_base::beg);
30 // ignore warning about null pointer dereference from GCC 12 for now (which is *likely* not correct)
31#ifdef __GNUC__
32#pragma GCC diagnostic push
33#pragma GCC diagnostic ignored "-Wnull-dereference"
34#endif
35 res.assign((istreambuf_iterator<char>(file)), istreambuf_iterator<char>());
36#ifdef __GNUC__
37#pragma GCC diagnostic pop
38#endif
39 return res;
40}
41
47std::string readFile(std::string_view path, std::string_view::size_type maxSize)
48{
49 return readFile(std::string(path), maxSize);
50}
51
58 void writeFile(std::string_view path, std::string_view contents)
59{
60 auto file = NativeFileStream();
61 file.exceptions(ios_base::failbit | ios_base::badbit);
62 file.open(std::string(path), ios_base::out | ios_base::trunc | ios_base::binary);
63 file.write(contents.data(), static_cast<std::streamoff>(contents.size()));
64 file.close();
65}
66
67} // namespace CppUtilities
misc.h
CppUtilities
Contains all utilities provided by the c++utilities library.
Definition argumentparser.h:18
CppUtilities::readFile
CPP_UTILITIES_EXPORT std::string readFile(const std::string &path, std::string::size_type maxSize=std::string::npos)
Reads all contents of the specified file in a single call.
Definition misc.cpp:17
CppUtilities::NativeFileStream
std::fstream NativeFileStream
Definition nativefilestream.h:134
CppUtilities::writeFile
CPP_UTILITIES_EXPORT void writeFile(std::string_view path, std::string_view contents)
Writes all contents to the specified file in a single call.
Definition misc.cpp:58
std
STL namespace.
nativefilestream.h