#include "device.h"

Device* createDevice(
    const char* name,
    void (*update)(Device* self)
) {
    Device* new = malloc(sizeof(Device));
    if (!new)
        return NULL;

    size_t nameLen = strlen(name) + 1;
    nameLen = nameLen < 32 ? nameLen : 32;

    memcpy(new->name, name, nameLen);
    new->name[nameLen] = 0;

    new->update = update;

    return new;
}

uint16_t deviceRead(Device* self) {
    if (self->inPos == 0)
        return 0;

    return self->in[--self->inPos];
}

void deviceSend(Device* self, uint16_t value) {
    if (self->outPos == DEVICE_BUFFER_LENGTH)
        return;

    self->out[self->outPos++] = value;
}

bool deviceCanRead(Device* self) {
    return self->inPos > 0;
}