From 9c237e1537238ebe95289ed6df82f6d43c482944 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Wed, 24 Aug 2022 02:56:26 +0200
Subject: Fix bug in ParsedDoc.

The parser context wants its own buffer, apparently. (The
documentation is a little ... sub-par.)
---
 c/data.cpp | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/c/data.cpp b/c/data.cpp
index 7c0fcb7..7722cd0 100644
--- a/c/data.cpp
+++ b/c/data.cpp
@@ -25,37 +25,39 @@ using XmlXPathObjectPtr = Managed<xmlXPathObjectPtr, xmlXPathFreeObject, XmlErro
 static inline void XmlFree(void* p) { xmlFree(p); }
 using XmlCharPtr = Managed<xmlChar*, XmlFree, XmlError>;
 
+using InternetHandle = Managed<HINTERNET, InternetCloseHandle, InternetError>;
+static InternetHandle s_hi = InternetOpen(L"Episode Browser", INTERNET_OPEN_TYPE_DIRECT, nullptr, nullptr, 0);
+
 struct ParsedDoc
 {
-	using InternetHandle = Managed<HINTERNET, InternetCloseHandle, InternetError>;
 	using HtmlParserCtxtPtr = Managed<htmlParserCtxtPtr, xmlFreeParserCtxt, XmlError>;
 	using HtmlDocPtr = Managed<htmlDocPtr, xmlFreeDoc, XmlError>;
 
-	InternetHandle hi;
 	InternetHandle hiUrl;
 	HtmlParserCtxtPtr ctxt;
-	char buf[1024];
+	char bufI[1024];
+	char bufX[1024];
 
 	ParsedDoc(const wchar_t* wszUrl, const char* szUrl)
-		: hi(InternetOpen(L"Episode Browser", INTERNET_OPEN_TYPE_DIRECT, nullptr, nullptr, 0)),
-		  hiUrl(InternetOpenUrl(hi, wszUrl, nullptr, 0, INTERNET_FLAG_NO_UI, 0)),
-		  ctxt(htmlCreatePushParserCtxt(nullptr, nullptr, buf, sizeof(buf), szUrl, XML_CHAR_ENCODING_UTF8))
+		: hiUrl(InternetOpenUrl(s_hi, wszUrl, nullptr, 0, INTERNET_FLAG_NO_UI, 0)),
+		  ctxt(htmlCreatePushParserCtxt(nullptr, nullptr, bufX, sizeof(bufX), szUrl, XML_CHAR_ENCODING_UTF8))
 	{
 		htmlCtxtUseOptions(ctxt, HTML_PARSE_RECOVER|HTML_PARSE_NOERROR|HTML_PARSE_NOWARNING);
 
 		BOOL r;
 		DWORD cbRead;
-		while (r = InternetReadFile(hiUrl, buf, sizeof(buf), &cbRead), cbRead) {
+		while (r = InternetReadFile(hiUrl, bufI, sizeof(bufI), &cbRead), cbRead) {
 			if (!r)
 				throw InternetError();
-			if (!htmlParseChunk(ctxt, buf, cbRead, 0))
+			if (!htmlParseChunk(ctxt, bufI, cbRead, 0))
 				throw XmlError();
 		}
-		htmlParseChunk(ctxt, buf, 0, 1); /* Stop parsing. */
+		htmlParseChunk(ctxt, bufI, 0, 1); /* Stop parsing. */
 	}
 
 	operator htmlDocPtr() { return ctxt->myDoc; }
 };
+
 template <size_t N>
 bool WcharsFromXmlchars(wchar_t (&dst)[N], XmlCharPtr utf8) noexcept
 {
-- 
cgit v1.2.3