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+/*
+ * Copyright 2019 Vincent Sanders <vince@netxurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NETSURF_UTILS_REGEX_H_
+#define NETSURF_UTILS_REGEX_H_
+
+#include "utils/config.h"
+
+#ifdef HAVE_REGEX
+#include <sys/types.h>
+#include <regex.h>
+#else
+
+#define REG_NOMATCH 1
+
+#define REG_EXTENDED 1
+#define REG_ICASE (1 << 1)
+#define REG_NEWLINE (1 << 2)
+#define REG_NOSUB (1 << 3)
+
+typedef ssize_t regoff_t;
+
+typedef struct {
+ size_t re_nsub; /* Number of parenthesized subexpressions.*/
+} regex_t;
+
+
+typedef struct {
+ regoff_t rm_so; /* Byte offset from start of string to start
+ * of substring.
+ */
+ regoff_t rm_eo; /* Byte offset from start of string of the
+ * first character after the end of substring.
+ */
+} regmatch_t;
+
+
+int regcomp(regex_t *restrict preg, const char *restrictregex, int cflags);
+
+size_t regerror(int errorcode, const regex_t *restrict preg, char *restrict errbuf, size_t errbuf_size);
+
+int regexec(const regex_t *restrict preg, const char *restrict string, size_t nmatch, regmatch_t pmatch[restrict], int eflags);
+
+void regfree(regex_t *preg);
+
+#endif
+
+#endif