apply_licenses.c

#include <stdio.h>
#include <stdlib.h>
#include "tobii_research_eyetracker.h"
 
void apply_licenses_example(TobiiResearchEyeTracker* eyetracker, const char* license_file_path) {
    #define NUM_OF_LICENSES 1
 
    char* license_key_ring[NUM_OF_LICENSES];
 
    FILE *license_file = fopen(license_file_path, "rb" );
 
    if( !license_file ) {
       printf("License not found!\n");
       return;
    }
    fseek(license_file, 0, SEEK_END);
    size_t file_size = (size_t)ftell(license_file);
 
    rewind(license_file);
    if(file_size <= 0) {
       printf("License is empty!\n");
       return;
    }
 
    license_key_ring[0] = (char*)malloc(file_size);
 
    if(license_key_ring[0]) {
       size_t read_bytes = fread( license_key_ring[0], sizeof(char), file_size, license_file );
       if (file_size != read_bytes) {
          printf("Failed to read license file!\n");
          return;
       }
    }
    fclose(license_file);
 
 
 
    printf("Applying license from %s.\n", license_file_path);
    TobiiResearchLicenseValidationResult validation_results;
 
    TobiiResearchStatus retval = tobii_research_apply_licenses(eyetracker, (const void**)license_key_ring, &file_size, &validation_results, NUM_OF_LICENSES);
 
    free(license_key_ring[0]);
 
 
    if (retval == TOBII_RESEARCH_STATUS_OK && validation_results == TOBII_RESEARCH_LICENSE_VALIDATION_RESULT_OK) {
        printf("Successfully applied license from list of keys.\n");
    }
}