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//Compile with:
//gcc -g eina_json_03.c -o eina_json_03 `pkg-config --cflags --libs eina`
// This example demonstrates a simple use of a json context SAX parsing
// with callback function which prints indented json objects
#include "Eina.h"
#define DOERROR(x,args...) { printf(x,## args); return 1; }
#define BUFFSIZE 100
typedef struct
{
Eina_Strbuf *text;
unsigned long parent_idx;
} Sax_Parser_Data;
char *json_err_name[]={"No error","Lexical error","Syntax Error","Input Past End"};
char *json_type_string[]={"NULL","NUMBER","STRING","BOOLEAN","PAIR","OBJECT","ARRAY"};
char my_json[] =
"{\n\
\"String\":\"MyJSON\",\n \
\"Array\":[1,2,3,true,5,false,\"\",{},null,[78,\"Hello\"],\"World\"],\n \
\"Object\": { \"Subobj\":{ \"Sub1\":null,\"Sub2\":56} }\n \
}";
void *
sax_parser_cb(Eina_Json_Type type, void *parent, const char *text, void *data)
{
Sax_Parser_Data *saxdata = (Sax_Parser_Data *)data;
const char* strval = NULL;
switch(type)
{
case EINA_JSON_TYPE_NUMBER:
case EINA_JSON_TYPE_STRING:
case EINA_JSON_TYPE_PAIR:
strval = text;
break;
case EINA_JSON_TYPE_BOOLEAN:
strval = (*text == 't') ? "true" : "false";
break;
}
saxdata->parent_idx++;
eina_strbuf_append_printf(saxdata->text,
"(%p) PARENT(%p) TYPE:%s",
(void*)saxdata->parent_idx,
parent,
json_type_string[type]);
if (strval) eina_strbuf_append_printf(saxdata->text, " = \"%s\"", strval);
eina_strbuf_append_char(saxdata->text, '\n');
return (void*)saxdata->parent_idx;
}
int
main(int argc,void **argv)
{
Sax_Parser_Data mysax;
eina_init();
mysax.text = eina_strbuf_new();
mysax.parent_idx = 1;
// Its a SAX parsing. We initilize it with our our callback function
// and the data to be used by the callback.
Eina_Json_Context *ctx = eina_json_context_sax_new(sax_parser_cb, &mysax);
//Now parse
eina_json_context_parse(ctx, my_json);
//Analize and report results
Eina_Json_Error jsnerr = eina_json_context_error_get(ctx);
if (jsnerr)
{
printf ("Parsing failed\n");
printf ("Error %d:%d %s\n", eina_json_context_line_get(ctx),
eina_json_context_column_get(ctx),
json_err_name[jsnerr]);
}
else if (eina_json_context_completed_get(ctx))
{
// If parsing was successful - print the text that our callback produced.
printf ("File was successfully parsed\n\n");
printf("%s\n", eina_strbuf_string_get(mysax.text));
}
else
printf ("Parsing was not completed\n");
eina_strbuf_free(mysax.text);
eina_json_context_free(ctx);
eina_shutdown();
return 0;
}
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