fs Add tree subcommand

ulib/fs/path.c

@@ -0,0 +1,60 @@
+#include <fs/path.h>
+#include <string/string.h>
+
+void path_parse(const char *in, char *mp, char *path) {
+  if (in == 0 || *in == 0) {
+    mp[0] = 0;
+    path[0] = 0;
+    return;
+  }
+
+  int i = 0, j = 0, colonfound = 0;
+
+  while (in[i]) {
+    if (in[i] == ':') {
+      if (colonfound) {
+        mp[0] = 0;
+        path[0] = 0;
+        return;
+      }
+      colonfound = 1;
+      mp[i] = 0;
+      i++;
+      continue;
+    }
+
+    if (!colonfound) {
+      mp[i] = in[i];
+    } else {
+      path[j++] = in[i];
+    }
+
+    i++;
+  }
+
+  if (!colonfound) {
+    mp[i] = 0;
+    path[0] = 0;
+  } else {
+    path[j] = 0;
+  }
+}
+
+const char *path_basename(const char *path) {
+  if (!path) {
+    return NULL;
+  }
+
+  const char *aftercolon = string_strchr(path, ':');
+  if (aftercolon) {
+    path = aftercolon + 1;
+  }
+  const char *lastslash = NULL;
+  for (const char *p = path; *p; p++) {
+    if (*p == '/') {
+      lastslash = p;
+    }
+  }
+  return lastslash ? lastslash + 1 : path;
+}
+