Diff: jsmn/WeatherInfo.cpp

Revision:

0:f1d3878b8dd9

diff -r 000000000000 -r f1d3878b8dd9 jsmn/WeatherInfo.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jsmn/WeatherInfo.cpp	Sat Apr 08 14:45:51 2017 +0000
@@ -0,0 +1,63 @@
+#include "WeatherInfo.h"
+#include <string.h>
+#include <stdlib.h>
+
+static int jsoneq(const char * json, jsmntok_t * tok, const char * s)
+{
+    if (tok->type == JSMN_STRING && (int) strlen(s) == tok->end - tok->start &&
+        strncmp(json + tok->start, s, tok->end - tok->start) == 0) {
+            return 0;
+    }
+    return -1;    
+}
+
+int parseweatherinfo(const char * weather, WeatherInfo & winfo)
+{
+    // Parse weather information
+    jsmn_parser p;
+    jsmntok_t t[128];
+
+    jsmn_init(&p);
+    int r = jsmn_parse(&p, weather, strlen(weather), t, sizeof(t)/sizeof(t[0]));
+    // Top level must be an object
+    if ((r > 0) && (t[0].type == JSMN_OBJECT)) 
+    { 
+        /* Loop over all keys of the root object */
+        for (int i = 1; i < r; i++)
+        {
+            if (jsoneq(weather, &t[i], "description") == 0)
+            {
+                winfo.weather = std::string((const char *)(weather + t[i+1].start), (size_t) t[i+1].end - t[i+1].start);
+                i++;
+            }
+            else if (jsoneq(weather, &t[i], "icon") == 0)
+            {
+                winfo.icon = std::string((const char *)(weather + t[i+1].start), (size_t) t[i+1].end - t[i+1].start);
+                i++;
+            }
+            else if (jsoneq(weather, &t[i], "temp") == 0)
+            {
+                std::string tempstr((const char *)(weather + t[i+1].start), (size_t) t[i+1].end - t[i+1].start);
+                winfo.temperature = strtod(tempstr.c_str(), NULL);
+                i++;
+            }
+            else if (jsoneq(weather, &t[i], "humidity") == 0)
+            {
+                std::string humidstr((const char *)(weather + t[i+1].start), (size_t) t[i+1].end - t[i+1].start);
+                winfo.humidity = strtod(humidstr.c_str(), NULL);
+                i++;
+            }            
+            else if (jsoneq(weather, &t[i], "pressure") == 0)
+            {
+                std::string pressurestr((const char *)(weather + t[i+1].start), (size_t) t[i+1].end - t[i+1].start);
+                winfo.pressure = strtod(pressurestr.c_str(), NULL);
+                i++;
+            }else
+            {
+                // discard the rest of the tokens
+            }
+        }
+        return 0;
+    }else
+        return -1;
+}