/**
 * File: voicecleardictionary.c
 *
 * Initializes Voice Recognition System word registration dictionary.
 *
 * The dictionary is initialized so that the specified "numWords" can be
 * registered in the dictionary. 1-255 words can be registered in the dictionary.
 *
 * Words cannot be registered with the osVoiceSetWord before the dictionary
 * is initialized with the osVoiceClearDictionary function
 */

#include "PR/controller_voice.h"
#include "PR/controller.h"
#include "PR/os_voice.h"

s32 osVoiceClearDictionary(OSVoiceHandle* hd, u8 numWords) {
    s32 errorCode;
    u8 status;
    u8 data[4];

    errorCode = __osVoiceGetStatus(hd->__mq, hd->__channel, &status);
    if (errorCode != 0) {
        return errorCode;
    }

    if (status & 2) {
        return CONT_ERR_VOICE_NO_RESPONSE;
    }

    /**
     * data[0] = 2
     * data[1] = 0
     * data[2] = numWords
     * data[3] = 0
     */
    *(u32*)data = 0x2000000;
    data[2] = numWords;

    errorCode = __osVoiceContWrite4(hd->__mq, hd->__channel, 0, data);
    if (errorCode != 0) {
        return errorCode;
    }

    errorCode = __osVoiceCheckResult(hd, &status);
    if (errorCode & 0xFF00) {
        errorCode = CONT_ERR_INVALID;
    }

    return errorCode;
}