1 files changed, 54 insertions, 0 deletions
diff --git a/collectors/log2journal/log2journal-pattern.c b/collectors/log2journal/log2journal-pattern.c
new file mode 100644
index 000000000..4b7e9026b
--- /dev/null
+++ b/collectors/log2journal/log2journal-pattern.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "log2journal.h"
+
+void search_pattern_cleanup(SEARCH_PATTERN *sp) {
+    if(sp->pattern) {
+        freez((void *)sp->pattern);
+        sp->pattern = NULL;
+    }
+
+    if(sp->re) {
+        pcre2_code_free(sp->re);
+        sp->re = NULL;
+    }
+
+    if(sp->match_data) {
+        pcre2_match_data_free(sp->match_data);
+        sp->match_data = NULL;
+    }
+
+    txt_cleanup(&sp->error);
+}
+
+static void pcre2_error_message(SEARCH_PATTERN *sp, int rc, int pos) {
+    char msg[1024];
+    pcre2_get_error_in_buffer(msg, sizeof(msg), rc, pos);
+    txt_replace(&sp->error, msg, strlen(msg));
+}
+
+static inline bool compile_pcre2(SEARCH_PATTERN *sp) {
+    int error_number;
+    PCRE2_SIZE error_offset;
+    PCRE2_SPTR pattern_ptr = (PCRE2_SPTR)sp->pattern;
+
+    sp->re = pcre2_compile(pattern_ptr, PCRE2_ZERO_TERMINATED, 0, &error_number, &error_offset, NULL);
+    if (!sp->re) {
+        pcre2_error_message(sp, error_number, (int) error_offset);
+        return false;
+    }
+
+    return true;
+}
+
+bool search_pattern_set(SEARCH_PATTERN *sp, const char *search_pattern, size_t search_pattern_len) {
+    search_pattern_cleanup(sp);
+
+    sp->pattern = strndupz(search_pattern, search_pattern_len);
+    if (!compile_pcre2(sp))
+        return false;
+
+    sp->match_data = pcre2_match_data_create_from_pattern(sp->re, NULL);
+
+    return true;
+}