1 files changed, 60 insertions, 0 deletions
diff --git a/libnetdata/simple_pattern/simple_pattern.h b/libnetdata/simple_pattern/simple_pattern.h
new file mode 100644
index 00000000..1a8d8f7d
--- /dev/null
+++ b/libnetdata/simple_pattern/simple_pattern.h
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_SIMPLE_PATTERN_H
+#define NETDATA_SIMPLE_PATTERN_H
+
+#include "../libnetdata.h"
+
+
+typedef enum __attribute__ ((__packed__)) {
+    SIMPLE_PATTERN_EXACT,
+    SIMPLE_PATTERN_PREFIX,
+    SIMPLE_PATTERN_SUFFIX,
+    SIMPLE_PATTERN_SUBSTRING
+} SIMPLE_PREFIX_MODE;
+
+typedef enum __attribute__ ((__packed__)) {
+    SP_NOT_MATCHED,
+    SP_MATCHED_NEGATIVE,
+    SP_MATCHED_POSITIVE,
+} SIMPLE_PATTERN_RESULT;
+
+typedef void SIMPLE_PATTERN;
+
+// create a simple_pattern from the string given
+// default_mode is used in cases where EXACT matches, without an asterisk,
+// should be considered PREFIX matches.
+SIMPLE_PATTERN *simple_pattern_create(const char *list, const char *separators, SIMPLE_PREFIX_MODE default_mode, bool case_sensitive);
+
+struct netdata_string;
+
+// test if string str is matched from the pattern and fill 'wildcarded' with the parts matched by '*'
+SIMPLE_PATTERN_RESULT simple_pattern_matches_extract(SIMPLE_PATTERN *list, const char *str, char *wildcarded, size_t wildcarded_size);
+SIMPLE_PATTERN_RESULT simple_pattern_matches_string_extract(SIMPLE_PATTERN *list, struct netdata_string *str, char *wildcarded, size_t wildcarded_size);
+SIMPLE_PATTERN_RESULT simple_pattern_matches_buffer_extract(SIMPLE_PATTERN *list, BUFFER *str, char *wildcarded, size_t wildcarded_size);
+SIMPLE_PATTERN_RESULT simple_pattern_matches_length_extract(SIMPLE_PATTERN *list, const char *str, size_t len, char *wildcarded, size_t wildcarded_size);
+
+// test if string str is matched from the pattern
+#define simple_pattern_matches(list, str) (simple_pattern_matches_extract(list, str, NULL, 0) == SP_MATCHED_POSITIVE)
+#define simple_pattern_matches_string(list, str) (simple_pattern_matches_string_extract(list, str, NULL, 0) == SP_MATCHED_POSITIVE)
+#define simple_pattern_matches_buffer(list, str) (simple_pattern_matches_buffer_extract(list, str, NULL, 0) == SP_MATCHED_POSITIVE)
+
+// free a simple_pattern that was created with simple_pattern_create()
+// list can be NULL, in which case, this does nothing.
+void simple_pattern_free(SIMPLE_PATTERN *list);
+
+void simple_pattern_dump(uint64_t debug_type, SIMPLE_PATTERN *p) ;
+int simple_pattern_is_potential_name(SIMPLE_PATTERN *p) ;
+char *simple_pattern_iterate(SIMPLE_PATTERN **p);
+
+// Auxiliary function to create a pattern
+char *simple_pattern_trim_around_equal(char *src);
+
+#define SIMPLE_PATTERN_DEFAULT_WEB_SEPARATORS ",|\t\r\n\f\v"
+
+#define is_valid_sp(x) ((x) && *(x) && !((x)[0] == '*' && (x)[1] == '\0'))
+
+#define string_to_simple_pattern(str) (is_valid_sp(str) ? simple_pattern_create(str, SIMPLE_PATTERN_DEFAULT_WEB_SEPARATORS, SIMPLE_PATTERN_EXACT, true) : NULL)
+#define string_to_simple_pattern_nocase(str) (is_valid_sp(str) ? simple_pattern_create(str, SIMPLE_PATTERN_DEFAULT_WEB_SEPARATORS, SIMPLE_PATTERN_EXACT, false) : NULL)
+
+#endif //NETDATA_SIMPLE_PATTERN_H