first time trying out reading files and stuff, this is just a program to try out different methods of doing the same thing

2 files changed, 146 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..dc2d83c
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+CC=clang++
+CFLAGS=-Wall -s -static -O3 -Wextra -DNDEBUG -fomit-frame-pointer -flto -std=c++20
+
+all:
+	$(CC) $(CFLAGS) read_print_file.cpp -o rpf
+
+clean:
+	rm -f rpf
diff --git a/read_print_file.cpp b/read_print_file.cpp
new file mode 100644
index 0000000..5221c1d
--- /dev/null
+++ b/read_print_file.cpp
@@ -0,0 +1,138 @@
+#include <iostream>
+#include <filesystem>
+#include <fstream>
+#include <vector>
+#include <unistd.h>
+#define USAGE "rpf [-1][-2][-3] [FILE]"
+
+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(1024);
+		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(1024);
+		thisfile.read(vecbuf.data(), vecbuf.size());
+		std::cout.write(vecbuf.data(), thisfile.gcount());
+	}
+	
+	std::cout << "File size: " << size << std::endl;
+	thisfile.close();
+}
+
+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;
+    while ((opt = getopt(argc, argv, "123")) != -1) {
+        switch (opt) {
+        case '1':
+
+			one = 1;
+			
+			break;
+        case '2':
+
+			two = 1;
+			
+			break;
+		case '3':
+
+			three = 1;
+			
+			break;
+		}
+	}
+
+	if((one + two + three) > 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;
+	}
+	
+	return EXIT_SUCCESS;
+}