1 files changed, 122 insertions, 0 deletions
diff --git a/src/boom.c b/src/boom.c
new file mode 100644
index 0000000..5d2a6d7
--- /dev/null
+++ b/src/boom.c
@@ -0,0 +1,122 @@
+#include <assert.h>
+#include <ftw.h>
+#include <getopt.h>
+#include <limits.h>
+#include <pwd.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "util/versie.h"
+
+static int max_depth = -1;
+
+static bool show_hidden = false;
+static bool dirs_only = false;
+
+static void usage(FILE *f) {
+  fprintf(f,
+      "Gebruik: boom [-thV] [STARTPUNTEN]...\n"
+      "\n"
+      "TODO\n"
+      "\n"
+      "  -t          Bestandtypes om weer te geven, kan zijn b(estand), m(apje) of een combinatie gescheiden door komma's\n"
+      "  -d          Maximale diepte\n"
+      "  -o          Omvang van n beten (+, - voor meer of minder)\n"
+      "  -h          Toon deze hulptekst\n"
+      "  -V          Toon versienummer\n");
+}
+
+// Returns pointer to argument array containing the starting points
+static char** parse_options(int argc, char **argv) {
+  int opt;
+  while ((opt = getopt(argc, argv, "adhV")) != -1) {
+    switch (opt) {
+      case 'a':
+        show_hidden = true;
+        break;
+
+      case 'd':
+        dirs_only = true;
+        break;
+
+      case 'h':
+        usage(stdout);
+        exit(0);
+
+      case 'V':
+        drukkedoos_print_versie(stdout);
+        exit(0);
+
+      case '?':
+        usage(stderr);
+        exit(1);
+    }
+  }
+
+  return argv + optind;
+}
+
+static int prev_level = -1;
+static int skip_level = -1;
+
+static int f(const char *fpath, const struct stat *, int typeflag, struct FTW *ftwbuf) {
+  int level = ftwbuf->level;
+  bool is_dir
+     = typeflag == FTW_D
+    || typeflag == FTW_DNR
+    || typeflag == FTW_DP;
+
+  if (level < skip_level) {
+    skip_level = -1;
+  } else if (skip_level != -1 && level >= skip_level) {
+    return 0;
+  }
+
+  // check max depth
+  if (max_depth >= 0 && level >= max_depth) return 0;
+
+  const char *fname = basename(fpath);
+
+  // don't show hidden files
+  if (!show_hidden && fname[0] == '.' && strlen(fpath) > 2 && level != 0) {
+    skip_level = level + 1;
+    goto done;
+  }
+  // don't show files in dirs only mode
+  if (dirs_only && !is_dir) return 0;
+
+  for (int i = 1; i < level; i++) {
+    printf("|   ");
+  }
+
+  if (level != 0) {
+    printf("|-- ");
+  }
+  puts(fname);
+
+done:
+  prev_level = level;
+  return 0;
+}
+
+int entry_boom(int argc, char **argv) {
+  char **args = parse_options(argc, argv);
+
+  int flags = 0;
+  flags |= FTW_PHYS;
+
+  if (*args == NULL) {
+    nftw(".", f, 4096, flags);
+    return 0;
+  }
+
+  for (int i = 0; args[i]; i++) {
+    nftw(args[i], f, 4096, flags);
+  }
+
+  return 0;
+}