feat: Add browser applet

Author: Sorunome

libctru/include/3ds.h

@@ -92,7 +92,7 @@ extern "C" {
 
 #include <3ds/applets/swkbd.h>
 #include <3ds/applets/error.h>
-
+#include <3ds/applets/browser.h>
 #include <3ds/applets/miiselector.h>
 
 #include <3ds/archive.h>

libctru/include/3ds/applets/browser.h

@@ -0,0 +1,12 @@
+/**
+ * @file browser.h
+ * @brief Browser Applet
+ */
+
+#pragma once
+
+/**
+ * @brief Open the browser at a url
+ * @param url The url to open at, max-length 1024 characters including the trailing zero. If invalid or null, just opens the browser.
+ */
+void browserOpenUrl(const char* url);

libctru/source/applets/browser.c

@@ -0,0 +1,21 @@
+#include <3ds/types.h>
+#include <3ds/services/apt.h>
+
+#include <3ds/applets/browser.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+void browserOpenUrl(const char* url)
+{
+	size_t url_len = url ? (strlen(url) + 1) : 0;
+	// check that we passed a url, it isn't too long and not too short (needs at least "http://")
+	// if that is not the case, we just claim our buffer was 0 in size
+	if (url_len > 0x400 || url_len < 8) url_len = 0;
+	// Something (aptLaunchSystemApplet? webbrowser?) tries to write / trashes the buffer.
+	// So, we copy the url onto the heap so that all still works out and our original argument remains const
+	void* buffer = malloc(url_len);
+	if (buffer) memcpy(buffer, url, url_len);
+	aptLaunchSystemApplet(APPID_WEB, buffer, url_len, 0);
+	if (buffer) free(buffer);
+}