Diff: RecordGeo.cpp

Revision:

0:51d7bdf88981

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RecordGeo.cpp	Thu Dec 07 17:07:22 2017 +0000
@@ -0,0 +1,102 @@
+/**
+ ******************************************************************************
+ * @file    RecordGEO.cpp
+ * @author  ST / Central Labs
+ * @version V2.0.0
+ * @date    28 Apr 2017
+ * @brief   RecordGEO implementation.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *   1. Redistributions of source code must retain the above copyright notice,
+ *      this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright notice,
+ *      this list of conditions and the following disclaimer in the documentation
+ *      and/or other materials provided with the distribution.
+ *   3. Neither the name of STMicroelectronics nor the names of its contributors
+ *      may be used to endorse or promote products derived from this software
+ *      without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+#include <cstdio>
+
+#include "RecordGeo.h"
+
+namespace NDefLib {
+
+const std::string RecordGeo::sGeoTag = ("geo:");
+
+//number of digits used for print the coordintate
+#define N_FLOAT_DIGIS 4
+#define N_INTEGER_DIGIS 3
+//string with the 2 coordinate format
+#define COORDINATE_WRITE_FORMAT "%3.4f,%3.4f"
+//+1 = sign, +1 = .
+#define COORDINATE_STR_SIZE (1+N_INTEGER_DIGIS+1+N_FLOAT_DIGIS)
+
+//string to use for read a couple of coordinate
+#define COORDINATE_READ_FORMAT "%f,%f"
+
+
+RecordGeo::RecordGeo(const float lat, const float lon) :
+		RecordURI(sGeoTag), mLatitiude(lat), mLongitude(lon), mContentIsChange(true) {
+};
+
+void RecordGeo::update_content(){
+	if(!mContentIsChange) {
+		return;
+	}
+
+	//2 coordinate +1 for the separator +1 for the \0
+	char buffer[2*COORDINATE_STR_SIZE+1+1];
+	std::sprintf(buffer,COORDINATE_WRITE_FORMAT,mLatitiude,mLongitude);
+	mContent.clear();
+	mContent.append(buffer);
+
+	mContentIsChange=false;
+}
+
+RecordGeo* RecordGeo::parse(const RecordHeader &header, const uint8_t * const buffer) {
+	uint16_t offset = 0;
+	if (buffer[offset++] != RecordURI::sNDEFUriIdCode) {
+		return NULL;
+	}
+	if (buffer[offset++] != RecordURI::UNKNOWN) {
+		return NULL;
+	}
+	if (sGeoTag.compare(0, sGeoTag.size(), (const char*) buffer + offset, sGeoTag.size()) != 0) {
+		return NULL;
+	}
+	offset += sGeoTag.size();
+
+	const std::string uriContent((const char*) (buffer + offset), header.get_payload_length() - offset);
+
+	float lat, lon;
+	//build the record only if both the coordinate are available
+	if (std::sscanf(uriContent.c_str(),COORDINATE_READ_FORMAT,&lat,&lon)!=2) {
+		return NULL;
+	}
+
+	return new RecordGeo(lat,lon);
+}
+
+} /* namespace NDefLib */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/