1 files changed, 44 insertions, 0 deletions
diff --git a/src/readsubdir.c b/src/readsubdir.c
new file mode 100644
index 0000000..754aa36
--- /dev/null
+++ b/src/readsubdir.c
@@ -0,0 +1,44 @@
+#include "readsubdir.h"
+#include "fmt.h"
+#include "scan.h"
+#include "str.h"
+#include "auto_split.h"
+
+void readsubdir_init(readsubdir *rs, char *name, void (*pause)())
+{
+  rs->name = name;
+  rs->pause = pause;
+  rs->dir = 0;
+  rs->pos = 0;
+}
+
+static char namepos[FMT_ULONG + 4 + READSUBDIR_NAMELEN];
+
+int readsubdir_next(readsubdir *rs, unsigned long *id)
+{
+  direntry *d;
+  unsigned int len;
+
+  if (!rs->dir) {
+    if (rs->pos >= auto_split) return 0;
+    if (str_len(rs->name) > READSUBDIR_NAMELEN) { rs->pos++; return -1; }
+    len = 0;
+    len += fmt_str(namepos + len,rs->name);
+    namepos[len++] = '/';
+    len += fmt_ulong(namepos + len,(unsigned long) rs->pos);
+    namepos[len] = 0;
+    while (!(rs->dir = opendir(namepos))) rs->pause(namepos);
+    rs->pos++;
+    return -1;
+  }
+
+  d = readdir(rs->dir);
+  if (!d) { closedir(rs->dir); rs->dir = 0; return -1; }
+
+  if (str_equal(d->d_name,".")) return -1;
+  if (str_equal(d->d_name,"..")) return -1;
+  len = scan_ulong(d->d_name,id);
+  if (!len || d->d_name[len]) return -2;
+
+  return 1;
+}