2 files changed, 53 insertions, 0 deletions
diff --git a/src/util/loop_files.c b/src/util/loop_files.c
new file mode 100644
index 0000000..2ef592e
--- /dev/null
+++ b/src/util/loop_files.c
@@ -0,0 +1,46 @@
+#include "global.h"
+#include "loop_args.h"
+#include "loop_files.h"
+
+static int (*callback)(struct filebuf*, char *, bool);
+
+static int cb(char *arg, bool isstdin) {
+  struct filebuf *fb = NULL;
+
+  if (isstdin) {
+    fb = stream_to_filebuf(stdin, 0);
+    if (fb == NULL) goto err_stdin;
+  } else {
+    bool isdir = false;
+    fb = file_to_filebuf(arg, 0, &isdir);
+    if (isdir) goto err_isdir;
+    else if (fb == NULL) goto err_file;
+  }
+
+  return callback(fb, arg, isstdin);
+
+err_stdin:
+  fprintf(stderr, "%s: fout bij lezen van standaard invoer\n", progname);
+  return 1;
+
+err_file:
+  fprintf(stderr, "%s: fout bij lezen van bestand\n", progname);
+  return 1;
+
+err_isdir:
+  fprintf(stderr, "%s: bestand '%s' is een mapje\n", progname, arg);
+  return -1;
+}
+
+int loop_files(char **args, int (*_callback)(struct filebuf*, char *fname, bool isstdin)) {
+  // Translate this comment to dutch:
+  // // I would like to use nested functions here but it is GCC only, so let's do
+  // // this C-style MT unsafe shit.
+  //
+  // Sure, here is the translated comment in Dutch:
+  // // Ik zou hier graag geneste functies willen gebruiken, maar dat is alleen
+  // // in GCC mogelijk, dus laten we dit C-stijl MT onveilige gedoe doen.
+  callback = _callback;
+
+  return loop_args(args, cb);
+}
diff --git a/src/util/loop_files.h b/src/util/loop_files.h
new file mode 100644
index 0000000..b436631
--- /dev/null
+++ b/src/util/loop_files.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <stdbool.h>
+
+#include "io/read_file.h"
+
+int loop_files(char **args, int (*callback)(struct filebuf*, char *fname, bool isstdin));