init commit

3sem/cnts/contest5/05-old.c

@@ -0,0 +1,99 @@
+#include <stdlib.h>
+#include <string.h>
+#include <linux/limits.h>
+#include <stdio.h>
+
+char *
+relativize_path(const char *path1, const char *path2)
+{
+    char *spath1 = calloc(strlen(path1) + 2, sizeof(char));
+    strcpy(spath1, path1);
+    spath1[strlen(path1)] = '\0';
+    if (spath1[strlen(path1) - 1] != '/') {
+        strcat(spath1, "/");
+    }
+
+    char *res;
+    if ((res = calloc(PATH_MAX, sizeof(char))) == NULL) {
+        exit(1);
+    }
+
+    int i = 0;
+    int ptr = 0;
+    while (spath1[i] == path2[i] && spath1[i]) {
+        if (spath1[i] == '/') {
+            ptr = i;
+        }
+        i++;
+    }
+
+    int deep1 = 0;
+    while (spath1[i]) {
+        if (spath1[i] == '/') {
+            deep1++;
+        }
+
+        i++;
+    }
+
+    if (!deep1 && path2[strlen(path2) - 1] == '/') {
+        snprintf(res, PATH_MAX, ".");
+        return res;
+    }
+
+    int deep2 = 0;
+    i = ptr + 1;
+    while (path2[i]) {
+        if (path2[i] == '/') {
+            deep2++;
+        }
+
+        i++;
+    }
+
+    for (int j = 0; j < deep1; j++) {
+        res[j * 3] = '.';
+        res[j * 3 + 1] = '.';
+        res[j * 3 + 2] = '/';
+    }
+
+    if (deep2 == 0 && deep1) {
+        if (res[strlen(res) - 1] == '/') {
+            res[strlen(res) - 1] = '\0';
+        }
+        return res;
+    }
+
+    snprintf(res + deep1 * 3, PATH_MAX - deep1 * 3, "%s", path2 + ptr + 1);
+
+    if (res[strlen(res) - 1] == '/') {
+        res[strlen(res) - 1] = '\0';
+    }
+
+    return res;
+}
+
+int
+main()
+{
+    const char *path1 = "/home/krosh/cmc/contest5";
+    const char *path2 = "/home/krosh/cmc/contest5/subdir/file.txt";
+
+    char *relative_path = relativize_path(path1, path2);
+    printf("Relative path: %s\n", relative_path);
+
+    const char *path3 = "/a/b/c/d";
+    const char *path4 = "/a/e/f";
+
+    printf("Relative path: %s\n", relativize_path(path3, path4));
+
+    const char *path5 = "/a/f/g/h/j";
+    const char *path6 = "/a/f/g/h";
+    printf("Relative path: %s\n", relativize_path(path5, path6));
+
+    const char *path7 = "/a";
+    const char *path8 = "/a";
+    printf("Relative path: %s\n", relativize_path(path7, path8));
+
+    return 0;
+}