From 0382fccd17bdab223166f20541005bf45f113726 Mon Sep 17 00:00:00 2001
From: Syndamia <kamen@syndamia.com>
Date: Fri, 8 Dec 2023 10:31:42 +0200
Subject: [browser] Implemented initial syntax parsing

---
 util.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'util.c')

diff --git a/util.c b/util.c
index 6a0c0a3..e210e34 100644
--- a/util.c
+++ b/util.c
@@ -4,6 +4,7 @@
 
 #include <stdio.h>
 #include <errno.h>
+#include <regex.h>
 
 uint16_t inet_atop(const char *port) {
 	return htons(atoi(port));
@@ -21,3 +22,27 @@ void herr(int output, const char* funcName) {
 		exit(errno);
 	}
 }
+
+sds gsub(const sds str, const char* regex, const char* repl) {
+	regex_t preg;
+	regcomp(&preg, regex, 0);
+
+	int strInd = 0;
+	regmatch_t pmatch[1] = {
+		{ .rm_so = 0, .rm_eo = 0, },
+	};
+
+	sds ret = sdsempty();
+	// sdslen is in O(1) time
+	while (strInd < sdslen(str)) {
+		if (regexec(&preg, str + strInd, 1, pmatch, 0) > 0) {
+			ret = sdscat(ret, str + strInd);
+			break;
+		}
+		ret = sdscatlen(ret, str + strInd, pmatch[0].rm_so);
+		ret = sdscat(ret, repl);
+		strInd += pmatch[0].rm_eo;
+	}
+
+	return ret;
+}
-- 
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