main.cpp

00001 #include <ctype.h>
00002 
00003 #include "mbed.h"
00004 
00005 #include "jsmn.h"
00006 
00007 #define       MAXTOKEN       64
00008 
00009 const char *jsmn_type_str[] = {
00010   "PRIMITIVE",
00011   "OBJECT",
00012   "ARRAY",
00013   "STRING"
00014 };
00015 
00016 
00017 int main()
00018 {
00019   const char *js;            // Pointer to json string
00020   int         r;             // Number of token parsed
00021   jsmn_parser p;             // jsmn parser
00022   jsmntok_t   t[MAXTOKEN];   // Parsed token
00023 
00024   // JSON may contain multibyte characters or encoded unicode in
00025   // \uXXXX format.
00026   // mbed compiler may complain "invalid multibyte character sequence".
00027   js =
00028 "{"
00029 "  \"menu\":"
00030 "  {"
00031 "    \"id\": 1234,"
00032 "    \"group\": \"File\","
00033 "    \"popup\":"
00034 "    {"
00035 "      \"menuitem\":"
00036 "      ["
00037 "        {\"value\": true,    \"onclick\"  : \"বিশাল\"},"
00038 "        {\"value\": false,   0x1328       : \"groß\"},"
00039 "        {\"value\": null,    \"15\u00f8C\": \"3\u0111\"},"
00040 "        {\"value\": \"測試\", -12.34       :  99}"
00041 "      ]"
00042 "    }"
00043 "  }"
00044 "}";
00045 
00046   jsmn_init(&p);
00047   r = jsmn_parse(&p, js, strlen(js), t, MAXTOKEN);
00048 
00049   printf("Parsed %d tokens\n", r);
00050   
00051   printf("            TYPE       START   END  SIZE PAR\n");
00052   printf("           ----------  -----  ----  ---- ---\n");
00053 
00054   char        ch;
00055   jsmntok_t   at;            // A token for general use
00056   for (int i = 0; i < r; i++)
00057   {
00058     at = t[i];
00059     printf("Token %2d = %-10.10s (%4d - %4d, %3d, %2d) --> ",
00060            i, jsmn_type_str[at.type],
00061            at.start, at.end,
00062            at.size, at.parent);
00063 
00064     switch (at.type)
00065     {
00066       case JSMN_STRING:
00067         printf("%-10.*s\n", at.end - at.start + 2, js + at.start - 1);
00068         break;
00069 
00070       case JSMN_PRIMITIVE:
00071         ch = *(js + at.start);
00072 
00073         if (isdigit(ch) || ch == '-') 
00074           printf("%-10.*s\n", at.end - at.start, js + at.start);
00075         else if (tolower(ch) == 'n')
00076           printf("null\n");
00077         else if (tolower(ch) == 't')
00078           printf("true\n");
00079         else if (tolower(ch) == 'f')
00080           printf("false\n");
00081         break;
00082 
00083       default:
00084         printf("\n");
00085         break;
00086     }
00087   }
00088  
00089   while (1)
00090     ;
00091 }