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

---
 browser.c | 30 +++++++++++++++++++++++-------
 util.c    | 25 +++++++++++++++++++++++++
 util.h    |  2 ++
 3 files changed, 50 insertions(+), 7 deletions(-)

diff --git a/browser.c b/browser.c
index c2588d3..fe36782 100644
--- a/browser.c
+++ b/browser.c
@@ -8,8 +8,28 @@
 #include <stdio.h>
 
 #include <string.h>
+#include <sds/sds.h>
 #include <util.h>
 
+sds get_page(const int fd_socket) {
+	sds page = sdsempty();
+
+	char buff[512];
+	memset(buff, 0, 512);
+	while (read(fd_socket, buff, 512)) {
+		page = sdscat(page, buff);
+		memset(buff, 0, 512);
+	}
+
+	return page;
+}
+
+void renderPage(const sds page) {
+	sds toPrint = gsub(page, "\\*[^*]*\\*", "emph");
+	write(1, toPrint, sdslen(toPrint));
+	sdsfree(toPrint);
+}
+
 int main(int argc, char* argv[]) {
 	int fd_socket;
 	herr(fd_socket = socket(AF_INET, SOCK_STREAM, 0), "socket");
@@ -25,13 +45,9 @@ int main(int argc, char* argv[]) {
 	/* char msg[] = "hello@/test.txt"; */
 	write(fd_socket, argv[1], strlen(argv[1]));
 
-	char buff[256];
-	memset(buff, 0, sizeof(buff));
-	while (read(fd_socket, buff, 256)) {
-		write(1, buff, strlen(buff));
-		memset(buff, 0, sizeof(buff));
-	}
-	read(fd_socket, buff, 256);
+	sds page = get_page(fd_socket);
+	renderPage(page);
+	sdsfree(page);
 
 	close(fd_socket);
 }
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;
+}
diff --git a/util.h b/util.h
index 13ee5e5..7ea5311 100644
--- a/util.h
+++ b/util.h
@@ -2,9 +2,11 @@
 #define H_UTIL
 
 #include <inttypes.h>
+#include <sds/sds.h>
 
 uint16_t inet_atop(const char *port);
 void herr(int output, const char* funcName);
 void herrc(int output, const char* funcName);
+sds gsub(sds str, const char* regex, const char* repl);
 
 #endif
-- 
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