init commit

2025-04-13 21:48:15 +03:00
commit 23255e9121
192 changed files with 12200 additions and 0 deletions
@@ -0,0 +1,110 @@
+#include <stdio.h>        // Standard I/O functions
+#include <stdlib.h>       // Standard library functions: memory allocation, process control, conversions, etc.
+#include <fcntl.h>        // File control options
+#include <unistd.h>       // POSIX API: read, write, close, etc.
+#include <sys/file.h>     // File control options
+#include <sys/types.h>    // Data types used in system calls
+#include <sys/stat.h>     // Data returned by the functions fstat(), lstat(), and stat()
+#include <linux/limits.h> // Sizes of basic types
+#include <limits.h>       // Sizes of basic types
+#include <errno.h>        // Error reporting macros
+#include <stdint.h>       // Exact-width integer types
+#include <math.h>         // Mathematical functions
+#include <dirent.h>       // Directory entry format
+#include <string.h>       // String handling functions
+#include <sys/stat.h>     // Data returned by the functions fstat(), lstat(), and stat()
+
+// переписать на strcmp.
+
+void
+normalize_path(char *buf)
+{
+    unsigned long long pt_real = 0, pt_res = 0;
+
+    unsigned long long len = 0; // проверить правильное вычисление длины
+    while (buf[len++] != '\0')
+        ;
+    len--;
+
+    while (pt_real < len) {
+        printf("pt: %lld -- %d %d %d\n", pt_real, pt_real - 2 == len, buf[pt_real] == '.',
+               buf[pt_real + 1] == '.'); // может вызвать выход за массив
+        if ((len - pt_real >= 3 && buf[pt_real] == '.' && buf[pt_real + 1] == '.' && buf[pt_real + 2] == '/') ||
+            (pt_real - 2 == len && buf[pt_real] == '.' && buf[pt_real + 1] == '.')) {
+            printf("meow\n");
+            if (pt_real > 0 && buf[pt_real - 1] == '/') {
+                pt_real += 3;
+
+                if (pt_res == 1) {
+                    continue;
+                }
+
+                if (pt_res == 0) { // impossible ?
+                    pt_res = 1;
+                    continue;
+                }
+                pt_res -= 2;
+                while (pt_res > 0 && buf[pt_res] != '/') {
+                    pt_res--;
+                }
+
+                pt_res++;
+                continue;
+            }
+        } else if ((len - pt_real >= 2 && buf[pt_real] == '.' && buf[pt_real + 1] == '/') ||
+                   (len == pt_real - 1 && buf[pt_real] == '.')) {
+            if (pt_real > 0 && buf[pt_real - 1] == '/') {
+                // printf("paw\n");
+                pt_real += 2;
+
+                continue;
+            }
+        }
+
+        buf[pt_res] = buf[pt_real];
+        pt_real++;
+        pt_res++;
+    }
+
+    // if (pt_real > 1 && buf[pt_real - 1] == '.') {
+    //     if (pt_real > 2 && buf[pt_real - 2] == '.' && buf[pt_real - 3] == '/') {
+    //         if (pt_res > 1) {
+    //             pt_res -= 2;
+    //             while (pt_res > 0 && buf[pt_res - 1] != '/') {
+    //                 pt_res--;
+    //             }
+    //         }
+    //     } else if (pt_real > 1 && buf[pt_real - 2] == '/') {
+    //         if (pt_res > 0) {
+    //             pt_res--;
+    //         }
+    //     }
+    // }
+
+    buf[pt_res] = '\0';
+
+    if (pt_res > 1 && buf[pt_res - 1] == '/') {
+        buf[pt_res - 1] = '\0';
+    }
+
+    return;
+}
+
+int
+main(int argc, char *argv[])
+{
+    if (argc != 2) {
+        fprintf(stderr, "Usage: %s <path>\n", argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    char path[PATH_MAX];
+    strncpy(path, argv[1], PATH_MAX - 1);
+    path[PATH_MAX - 1] = '\0';
+
+    normalize_path(path);
+
+    printf("Normalized path: %s\n", path);
+
+    return EXIT_SUCCESS;
+}