ir-parse.c

/**
 * Describes functions for parsing JSON IR CPER data into binary CPER format.
 * 
 * Author: Lawrence.Tang@arm.com
 **/

#include <stdio.h>
#include "json.h"
#include "edk/Cper.h"
#include "cper-parse.h"
#include "cper-utils.h"

//Private pre-declarations.
void ir_header_to_cper(json_object* header_ir, EFI_COMMON_ERROR_RECORD_HEADER* header);

//Converts the given JSON IR CPER representation into CPER binary format, piped to the provided file stream.
//This function performs no validation of the IR against the CPER-JSON specification. For this, call
//validate_schema() from json-schema.h before attempting to call this function. 
void ir_to_cper(json_object* ir, FILE* out)
{
    //Create the CPER header.
    EFI_COMMON_ERROR_RECORD_HEADER* header = (EFI_COMMON_ERROR_RECORD_HEADER*)calloc(1, sizeof(EFI_COMMON_ERROR_RECORD_HEADER));
    ir_header_to_cper(json_object_object_get(ir, "header"), header);
    fwrite(header, sizeof(EFI_COMMON_ERROR_RECORD_HEADER), 1, out);
    
    //...

    //Free all resources.
    fflush(out);
    free(header);
}

//Converts a CPER-JSON IR header to a CPER header structure.
void ir_header_to_cper(json_object* header_ir, EFI_COMMON_ERROR_RECORD_HEADER* header)
{
    header->SignatureStart = 0x52455043; //CPER
    printf("beginning write.\n");

    //Revision.
    json_object* revision = json_object_object_get(header_ir, "revision");
    int minor = json_object_get_int(json_object_object_get(revision, "minor"));
    int major = json_object_get_int(json_object_object_get(revision, "major"));
    header->Revision = minor + (major << 8);

    header->SignatureEnd = 0xFFFFFFFF;

    //Section count.
    int section_count = json_object_get_int(json_object_object_get(header_ir, "sectionCount"));
    header->SectionCount = (UINT16)section_count;

    //Error severity.
    json_object* severity = json_object_object_get(header_ir, "severity");
    header->ErrorSeverity = (UINT32)json_object_get_uint64(json_object_object_get(severity, "code"));

    //Validation bits.
    header->ValidationBits = ir_to_bitfield(json_object_object_get(header_ir, "validationBits"), 
        3, CPER_HEADER_VALID_BITFIELD_NAMES);

    //Record length.
    header->RecordLength = (UINT32)json_object_get_uint64(json_object_object_get(header_ir, "recordLength"));

    //Timestamp, if present.
    printf("timestamp write.\n");
    json_object* timestamp = json_object_object_get(header_ir, "timestamp");
    if (timestamp != NULL) 
    {
        string_to_timestamp(&header->TimeStamp, json_object_get_string(timestamp));
        header->TimeStamp.Flag = json_object_get_boolean(json_object_object_get(header_ir, "timestampIsPrecise"));
    }

    //Various GUIDs.
    printf("guid write.\n");
    json_object* platform_id = json_object_object_get(header_ir, "platformID");
    json_object* partition_id = json_object_object_get(header_ir, "partitionID");
    if (platform_id != NULL)
        string_to_guid(&header->PlatformID, json_object_get_string(platform_id));
    if (partition_id != NULL)
        string_to_guid(&header->PartitionID, json_object_get_string(partition_id));
    string_to_guid(&header->CreatorID, json_object_get_string(json_object_object_get(header_ir, "creatorID")));

    //Notification type.
    printf("notif type write.\n");
    json_object* notification_type = json_object_object_get(header_ir, "notificationType");
    string_to_guid(&header->NotificationType, json_object_get_string(json_object_object_get(notification_type, "guid")));

    //Record ID, persistence info.
    header->RecordID = json_object_get_uint64(json_object_object_get(header_ir, "recordID"));
    header->PersistenceInfo = json_object_get_uint64(json_object_object_get(header_ir, "persistenceInfo"));

    //Flags.
    printf("flag write.\n");
    json_object* flags = json_object_object_get(header_ir, "flags");
    header->Flags = (UINT32)json_object_get_uint64(json_object_object_get(flags, "value"));
}