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//Compile with:
//gcc -g eina_json_02.c -o eina_json_02 `pkg-config --cflags --libs eina`
// This example reads and parses json text gradually from file by BUFFSIZE chunks.
// Usage: eina_json_02 jsonfile
#include "Eina.h"
#define DOERROR(x,args...) { printf(x,## args); return 1; }
#define BUFFSIZE 100
char *json_err_name[]={"No error","Lexical error","Syntax Error","Input Past End"};
char rbuff[BUFFSIZE] = {0};
int
main(int argc, void **argv)
{
size_t rd;
eina_init();
if (argc < 2) DOERROR("Usage: eina_json_02 filename \n");
FILE* fp = fopen(argv[1], "r");
if (!fp) DOERROR("Error openning file file %s\n", (char*)argv[1]);
// Its a DOM parsing. When its done without errors, we'll have a json tree to take.
Eina_Json_Context *ctx = eina_json_context_dom_new();
// Read and parse json file by BUFFSIZE chunks
while (eina_json_context_unfinished_get(ctx))
{
rd = fread(rbuff, 1, BUFFSIZE,fp);
eina_json_context_parse_n(ctx, rbuff, rd);
//End of file reached
if (rd != BUFFSIZE) break;
}
//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 - take the json tree and print it
printf ("File %s was successfully parsed \n\n", (char*)argv[1]);
Eina_Json_Value *jsnval = eina_json_context_dom_tree_take(ctx);
char *json_output = eina_json_format_string_get(jsnval, EINA_JSON_FORMAT_BASIC);
eina_json_value_free(jsnval);
printf("%s\n", json_output);
free(json_output);
}
else
printf ("Parsing was not completed - file is incomplete\n");
eina_json_context_free(ctx);
fclose(fp);
eina_shutdown();
return 0;
}
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