X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/8c6fa3fbaccc22127280bf77a48fab5a3ee0716e..46b0747592074017ff0ea4b33d4a7194235886e5:/libs/json/generator.cpp

diff --git a/libs/json/generator.cpp b/libs/json/generator.cpp
new file mode 100644
index 00000000..d18ef04a
--- /dev/null
+++ b/libs/json/generator.cpp
@@ -0,0 +1,82 @@
+/*
+ *    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
+ */
+
+#include "stg/json_generator.h"
+
+#include <yajl/yajl_gen.h>
+
+using STG::JSON::NullGen;
+using STG::JSON::BoolGen;
+using STG::JSON::StringGen;
+using STG::JSON::NumberGen;
+using STG::JSON::MapGen;
+using STG::JSON::ArrayGen;
+using STG::JSON::Callback;
+
+namespace
+{
+
+void genString(yajl_gen_t* handle, const std::string& value)
+{
+    yajl_gen_string(handle, reinterpret_cast<const unsigned char*>(value.c_str()), value.length());
+}
+
+}
+
+void NullGen::run(yajl_gen_t* handle) const { yajl_gen_null(handle); }
+void BoolGen::run(yajl_gen_t* handle) const { yajl_gen_bool(handle, m_value); }
+void StringGen::run(yajl_gen_t* handle) const { genString(handle, m_value); }
+void NumberGen::run(yajl_gen_t* handle) const { yajl_gen_number(handle, m_value.c_str(), m_value.length()); }
+
+void MapGen::run(yajl_gen_t* handle) const
+{
+    yajl_gen_map_open(handle);
+    for (Value::const_iterator it = m_value.begin(); it != m_value.end(); ++it)
+    {
+        genString(handle, it->first);
+        it->second.first->run(handle);
+    }
+    yajl_gen_map_close(handle);
+}
+
+void ArrayGen::run(yajl_gen_t* handle) const
+{
+    yajl_gen_array_open(handle);
+    for (Value::const_iterator it = m_value.begin(); it != m_value.end(); ++it)
+        it->first->run(handle);
+    yajl_gen_array_close(handle);
+}
+
+bool STG::JSON::generate(Gen& gen, Callback callback, void* data)
+{
+    yajl_gen handle = yajl_gen_alloc(NULL);
+
+    gen.run(handle);
+
+    const unsigned char* buf = NULL;
+    size_t size = 0;
+    yajl_gen_get_buf(handle, &buf, &size);
+
+    bool res = callback(data, reinterpret_cast<const char*>(buf), size);
+
+    yajl_gen_free(handle);
+
+    return res;
+}