1 files changed, 29 insertions, 0 deletions
diff --git a/filter.h b/filter.h
new file mode 100644
index 0000000..2bc41e1
--- /dev/null
+++ b/filter.h
@@ -0,0 +1,29 @@
+#pragma once
+
+
+enum filter_type {
+  // FILTER_INCLUDE,  // unsupported for now
+  FILTER_EXCLUDE,
+};
+
+// A subset of borg patterns
+enum pattern_type {
+  PATTERN_EQUAL,  // /str
+  PATTERN_PREFIX,  // /str/**
+  PATTERN_SUFFIX,  // **/str
+  PATTERN_INFIX,  // **/str/**
+};
+
+struct filter_rule {
+  enum filter_type ftype;
+  enum pattern_type ptype;
+  char *str;
+  size_t len;  // length of str (strlen, but cached)
+};
+
+struct filter_rule parse_exclude_rule(const char *rule);
+
+// The path must be relative to the tree root (and thus not start with a '/').
+bool filter_rule_allows(const struct filter_rule rule, const char *path);
+
+void filter_rule_debugdump(FILE *stream, const struct filter_rule rule);