Add implementation

diff --git a/ex04/main.cpp b/ex04/main.cpp
index 7dae41e978df62605c5d375589497fda8ef7621e..f2cbb8de9cf047b1e71111b618a021da08d3900e 100644 (file)
--- a/ex04/main.cpp
+++ b/ex04/main.cpp
@@ -6,9 +6,53 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/02/11 12:43:55 by dkaiser           #+#    #+#             */
-/*   Updated: 2025/02/11 12:44:29 by dkaiser          ###   ########.fr       */
+/*   Updated: 2025/02/12 10:30:49 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
+#include <cstddef>
+#include <fstream>
+#include <iostream>
+#include <string>
+
+static void replace(const std::string &filename,
+                   const std::string &find_str,
+                    const std::string &replace_str)
+{
+    std::ifstream infile(filename);
+    std::ofstream outfile(filename + ".replace");
+    std::string line;
+    std::size_t find_pos;
+    std::size_t search_from;
+    
+    while (std::getline(infile, line))
+    {
+       find_pos = 0;
+       search_from = 0;
+       while (find_pos != std::string::npos)
+       {
+           find_pos = line.find(find_str, search_from);
+           if (find_pos == std::string::npos)
+           {
+               break;
+           }
+           outfile << line.substr(search_from, find_pos);
+           outfile << replace_str;
+           search_from = find_pos + find_str.length();
+       }
+       outfile << line.substr(search_from) << std::endl;
+    }
+}
+
 int main(int argc, char *argv[])
-{}
+{
+    if (argc != 4)
+    {
+       std::cerr << "Expected args: <filename> <find_str> <replace_str>";
+       std::cerr << std::endl;
+        return 1;
+    }
+    replace(argv[1], argv[2], argv[3]);
+}
+
+