1 files changed, 83 insertions, 0 deletions
diff --git a/backends/cloud/curl/networkreadstream.cpp b/backends/cloud/curl/networkreadstream.cpp
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+++ b/backends/cloud/curl/networkreadstream.cpp
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+/* ScummVM - Graphic Adventure Engine
+*
+* ScummVM is the legal property of its developers, whose names
+* are too numerous to list here. Please refer to the COPYRIGHT
+* file distributed with this source distribution.
+*
+* This program 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; either version 2
+* of the License, or (at your option) any later version.
+*
+* This program 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, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*
+*/
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/cloud/curl/networkreadstream.h"
+#include "common/debug.h"
+#include <curl/curl.h>
+
+namespace Cloud {
+
+static size_t curlDataCallback(char *d, size_t n, size_t l, void *p) {	
+	NetworkReadStream *stream = (NetworkReadStream *)p;
+	if (stream) return stream->dataCallback(d, n, l);
+	return 0;
+}
+
+NetworkReadStream::NetworkReadStream(const char *url): _easy(0), _eos(false), _requestComplete(false) {
+	_easy = curl_easy_init();
+	curl_easy_setopt(_easy, CURLOPT_WRITEFUNCTION, curlDataCallback);
+	curl_easy_setopt(_easy, CURLOPT_WRITEDATA, this); //so callback can call us
+	curl_easy_setopt(_easy, CURLOPT_PRIVATE, this); //so ConnectionManager can call us when request is complete
+	curl_easy_setopt(_easy, CURLOPT_HEADER, 0L);
+	curl_easy_setopt(_easy, CURLOPT_URL, url);
+	curl_easy_setopt(_easy, CURLOPT_VERBOSE, 0L);
+}
+
+NetworkReadStream::~NetworkReadStream() {
+	curl_easy_cleanup(_easy);
+}
+
+bool NetworkReadStream::eos() const {
+	return _eos;
+}
+
+uint32 NetworkReadStream::read(void *dataPtr, uint32 dataSize) {
+	uint32 available = _bytes.size();
+
+	if (available == 0) {
+		if (_requestComplete) _eos = true;
+		return 0;
+	}
+
+	char *data = (char *)dataPtr;
+	uint32 actuallyRead = (dataSize < available ? dataSize : available);	
+	for (uint32 i = 0; i < actuallyRead; ++i) data[i] = _bytes[i];
+	data[actuallyRead] = 0;
+	_bytes.erase(0, actuallyRead);
+	return actuallyRead;
+}
+
+void NetworkReadStream::done() {
+	_requestComplete = true;
+}
+
+size_t NetworkReadStream::dataCallback(char *d, size_t n, size_t l) {
+	//TODO: return CURL_WRITEFUNC_PAUSE if _bytes is too long
+	//TODO: remember https://curl.haxx.se/libcurl/c/curl_easy_pause.html (Memory Use / compressed data case)
+	//TODO: if using pause, don't forget to unpause it somehow from read() up there
+	_bytes += Common::String(d, n*l);
+	return n*l;
+}
+
+} //end of namespace Cloud