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#include <iostream>
#include <filesystem>
#include <fstream>
#include <vector>
#include <unistd.h>
#define USAGE "rpf [-1][-2][-3][-4][-5] [FILE]"
#define VEC_BUF_SIZE 4096
void PrintFile(const std::filesystem::path &path) {
std::ifstream thisfile;
thisfile.open(path);
if(!thisfile.is_open()) {
std::cout << "Cannot open file" << std::endl;
return;
}
thisfile.seekg(0, std::ios::end); // seek to end
auto size = thisfile.tellg(); // get size
std::string data(size, '\0'); // make string of appropriate size
thisfile.seekg(0, std::ios::beg); // seek to beginning of file
thisfile.read(&data[0], size); // read entire file in to string
std::cout << data;
std::cout << "File size: " << size << std::endl;
thisfile.close();
}
void PrintFileBUFFERED_SINGLE_CHAR(const std::filesystem::path &path) {
std::ifstream thisfile;
thisfile.open(path);
if(!thisfile.is_open()) {
std::cout << "Cannot open file" << std::endl;
return;
}
thisfile.seekg(0, std::ios::end); // seek to end
auto size = thisfile.tellg(); // get size
thisfile.seekg(0, std::ios::beg); // seek to beginning of file
while (!thisfile.eof()) {
std::vector<char> vecbuf(VEC_BUF_SIZE);
for(auto a = vecbuf.begin() ; a != vecbuf.end() ; ++a) {
*a = thisfile.get();
}
for(const auto &a : vecbuf) {
std::cout << a;
}
}
std::cout << "File size: " << size << std::endl;
thisfile.close();
}
void PrintFileBUFFERED_READ(const std::filesystem::path &path) {
std::ifstream thisfile;
thisfile.open(path);
if(!thisfile.is_open()) {
std::cout << "Cannot open file" << std::endl;
return;
}
thisfile.seekg(0, std::ios::end); // seek to end
auto size = thisfile.tellg(); // get size
thisfile.seekg(0, std::ios::beg); // seek to beginning of file
while (!thisfile.eof()) {
std::vector<char> vecbuf(VEC_BUF_SIZE);
thisfile.read(vecbuf.data(), vecbuf.size());
std::cout.write(vecbuf.data(), thisfile.gcount());
}
std::cout << "File size: " << size << std::endl;
thisfile.close();
}
void PrintFileBUFFERED_READ_ARRAY(const std::filesystem::path &path) {
std::ifstream thisfile;
thisfile.open(path);
if(!thisfile.is_open()) {
std::cout << "Cannot open file" << std::endl;
return;
}
thisfile.seekg(0, std::ios::end); // seek to end
auto size = thisfile.tellg(); // get size
thisfile.seekg(0, std::ios::beg); // seek to beginning of file
while (!thisfile.eof()) {
char arrbuf[VEC_BUF_SIZE];
thisfile.read(arrbuf, VEC_BUF_SIZE);
std::cout.write(arrbuf, thisfile.gcount());
}
std::cout << "File size: " << size << std::endl;
thisfile.close();
}
void NCAT(const std::filesystem::path &path) {
FILE *file;
const char *filename = path.c_str();
file = fopen(filename,"r");
if (file == NULL) {
fprintf(stderr, "Cannot open file.\n");
return;
}
fseek(file, 0, SEEK_END);
auto size = ftell(file);
fseek(file, 0, SEEK_SET);
char buffer[VEC_BUF_SIZE];
size_t bytes_read;
while ((bytes_read = fread(buffer, 1, VEC_BUF_SIZE, file)) > 0) {
fwrite(buffer, 1, bytes_read, stdout);
}
std::cout << "File size: " << size << std::endl;
fclose(file);
}
inline void usageOUT() {
std::cerr << USAGE << std::endl;
}
int main (int argc, char **argv) {
if(argc < 3 || argc > 3) {
usageOUT();
return EXIT_FAILURE;
}
int opt;
int one = 0;
int two = 0;
int three = 0;
int four = 0;
int five = 0;
while ((opt = getopt(argc, argv, "12345")) != -1) {
switch (opt) {
case '1':
one = 1;
break;
case '2':
two = 1;
break;
case '3':
three = 1;
break;
case '4':
four = 1;
break;
case '5':
five = 1;
break;
}
}
if((one + two + three + four + five) > 1) {
usageOUT();
return EXIT_FAILURE;
}
int index;
std::filesystem::path path;
for (index = optind ; index < argc ; index++) {
path = argv[index];
}
if(one == 1) {
PrintFile(path);
std::cout << "PrintFile" << std::endl;
}
if(two == 1) {
PrintFileBUFFERED_SINGLE_CHAR(path);
std::cout << "PrintFileBSC" << std::endl;
}
if(three == 1) {
PrintFileBUFFERED_READ(path);
std::cout << "PrintFileBR" << std::endl;
}
if(four == 1) {
PrintFileBUFFERED_READ_ARRAY(path);
std::cout << "PrintFileBRA" << std::endl;
}
if(five == 1) {
NCAT(path);
std::cout << "NCAT" << std::endl;
}
return EXIT_SUCCESS;
}
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