vector_loadsave.cpp

Go to the documentation of this file.

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2020, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include "io-precomp.h"  // Precompiled headers

#include <mrpt/core/exceptions.h>
#include <mrpt/io/CFileInputStream.h>
#include <mrpt/io/CFileOutputStream.h>
#include <mrpt/io/vector_loadsave.h>
#include <mrpt/system/os.h>

using namespace mrpt;
using namespace mrpt::io;
using namespace std;
namespace os = mrpt::system::os;

bool mrpt::io::loadBinaryFile(
    std::vector<uint8_t>& out_data, const std::string& fileName)
{
    try
    {
        CFileInputStream fi(fileName);
        size_t N = fi.getTotalBytesCount();

        out_data.resize(N);
        if (N)
        {
            size_t NN = fi.Read(&out_data[0], N);
            return NN == N;
        }
        else
            return true;
    }
    catch (...)
    {
        return false;
    }
}

bool mrpt::io::vectorToBinaryFile(
    const std::vector<uint8_t>& vec, const std::string& fileName)
{
    try
    {
        mrpt::io::CFileOutputStream of(fileName);
        if (!vec.empty()) of.Write(&vec[0], sizeof(vec[0]) * vec.size());
        return true;
    }
    catch (...)
    {
        return false;
    }
}

bool mrpt::io::loadTextFile(
    std::vector<std::string>& o, const std::string& fileName)
{
    o.clear();
    std::ifstream f(fileName);
    if (!f.is_open()) return false;
    std::string s;
    while (std::getline(f, s)) o.emplace_back(std::move(s));
    return true;
}

std::string mrpt::io::file_get_contents(const std::string& fileName)
{
    // Credits: https://stackoverflow.com/a/2602258/1631514
    // Note: Add "binary" to make sure the "tellg" file size matches the actual
    // number of read bytes afterwards:
    std::ifstream t(fileName, ios::binary);
    if (!t.is_open())
        THROW_EXCEPTION_FMT(
            "file_get_contents(): Error opening for read file `%s`",
            fileName.c_str());

    t.seekg(0, std::ios::end);
    std::size_t size = t.tellg();
    std::string buffer(size, ' ');
    t.seekg(0);
    t.read(&buffer[0], size);
    return buffer;
}

bool mrpt::io::vectorToTextFile(
    const vector<float>& vec, const string& fileName, bool append, bool byRows)
{
    FILE* f = os::fopen(fileName.c_str(), append ? "at" : "wt");
    if (!f) return false;

    for (float it : vec) os::fprintf(f, byRows ? "%e " : "%e\n", it);

    if (byRows) os::fprintf(f, "\n");

    os::fclose(f);
    return true;  // All ok.
}

bool mrpt::io::vectorToTextFile(
    const vector<double>& vec, const string& fileName, bool append, bool byRows)
{
    FILE* f = os::fopen(fileName.c_str(), append ? "at" : "wt");
    if (!f) return false;

    for (double it : vec) os::fprintf(f, byRows ? "%e " : "%e\n", it);

    if (byRows) os::fprintf(f, "\n");

    os::fclose(f);
    return true;  // All ok.
}

bool mrpt::io::vectorToTextFile(
    const vector<int>& vec, const string& fileName, bool append, bool byRows)
{
    FILE* f = os::fopen(fileName.c_str(), append ? "at" : "wt");
    if (!f) return false;

    for (int it : vec) os::fprintf(f, byRows ? "%i " : "%i\n", it);

    if (byRows) os::fprintf(f, "\n");

    os::fclose(f);
    return true;  // All ok.
}

bool mrpt::io::vectorToTextFile(
    const vector<size_t>& vec, const string& fileName, bool append, bool byRows)
{
    FILE* f = os::fopen(fileName.c_str(), append ? "at" : "wt");
    if (!f) return false;

    for (unsigned long it : vec)
        os::fprintf(f, byRows ? "%u " : "%u\n", static_cast<unsigned int>(it));

    if (byRows) os::fprintf(f, "\n");

    os::fclose(f);
    return true;  // All ok.
}

bool mrpt::io::vectorNumericFromTextFile(
    std::vector<double>& vec, const std::string& fileName, bool byRows)
{
    FILE* f = os::fopen(fileName.c_str(), "r");
    if (!f) return false;

    double number = 0;

    while (!feof(f))
    {
        size_t readed = fscanf(f, byRows ? "%lf" : "%lf\n", &number);
        if ((!byRows) || (readed == 1)) vec.push_back(number);
    }

    return true;
}