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Sample program using picojson library. Note: it seems that there are some memory? issues with \"complex\" structures. So always test your json with the lib before using it within your application.
Diff: main.cpp
- Revision:
- 0:81c978de0e2b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Sep 09 13:13:17 2011 +0000 @@ -0,0 +1,68 @@ +#include "mbed.h" +#include "picojson.h" + + +void parse() { + picojson::value v; + const char *json = "{\"string\": \"it works\", \"number\": 3.14, \"integer\":5}"; + + string err = picojson::parse(v, json, json + strlen(json)); + printf("res error? %s\r\n", err.c_str()); + printf("string =%s\r\n" , v.get("string").get<string>().c_str()); + printf("number =%f\r\n" , v.get("number").get<double>()); + printf("integer =%d\r\n" , (int)v.get("integer").get<double>()); +} + +void serialize() { + picojson::object v; + picojson::object inner; + string val = "tt"; + + v["aa"] = picojson::value(val); + v["bb"] = picojson::value(1.66); + inner["test"] = picojson::value(true); + inner["integer"] = picojson::value(1.0); + v["inner"] = picojson::value(inner); + + string str = picojson::value(v).serialize(); + printf("serialized content = %s\r\n" , str.c_str()); +} + +void advanced() { + picojson::value v; + const char *jsonsoure = + "{\"menu\": {" + "\"id\": \"f\"," + "\"popup\": {" + " \"menuitem\": [" + " {\"v\": \"0\"}," + " {\"v\": \"1\"}," + " {\"v\": \"2\"}" + " ]" + " }" + "}" + "}"; + char * json = (char*) malloc(strlen(jsonsoure)+1); + strcpy(json, jsonsoure); + string err = picojson::parse(v, json, json + strlen(json)); + printf("res error? %s\r\n", err.c_str()); + + printf("id =%s\r\n", v.get("menu").get("id").get<string>().c_str()); + + picojson::array list = v.get("menu").get("popup").get("menuitem").get<picojson::array>(); + + for (picojson::array::iterator iter = list.begin(); iter != list.end(); ++iter) { + printf("menu item value =%s\r\n", (*iter).get("v").get<string>().c_str()); + } +} + +int main() { + printf("Starting PicoJSONSample "__TIME__"\r\n"); + printf(">>> parsing \r\n"); + parse(); + printf(">>> serializing \r\n"); + serialize(); + printf(">>> advanced parsing \r\n"); + advanced(); + printf("Ending PicoJSONSample " __TIME__ "\r\n"); +}