host_api_keypad.cpp

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// IKeypad.h first: host_api.h defines KEY_* macros that would otherwise
// clobber the cdc::hal::Key enumerators during preprocessing.
#include "cdc_hal/IKeypad.h"
#include "plugin_manager/host_api.h"
 
namespace {
 
cdc::hal::Key code_to_key(uint8_t code) {
    using cdc::hal::Key;
    if (code <= 9) return static_cast<Key>('0' + code);
    if (code == 10) return Key::KEY_YES;
    if (code == 11) return Key::KEY_NO;
    return Key::KEY_NONE;
}
 
int key_to_code(cdc::hal::Key k) {
    char c = static_cast<char>(k);
    if (c >= '0' && c <= '9') return c - '0';
    if (c == 'Y') return 10;
    if (c == 'N') return 11;
    return -1;
}
 
}  // namespace
 
extern "C" {
 
bool host_key_pressed(uint8_t key)
{
    auto* kp = cdc::hal::getKeypadInstance();
    if (!kp) return false;
    cdc::hal::Key k = code_to_key(key);
    return k != cdc::hal::Key::KEY_NONE && kp->isKeyPressed(k);
}
 
int host_key_consume_next(uint8_t* out_key)
{
    if (!out_key) return HOST_ERR_INVALID_ARG;
    auto* kp = cdc::hal::getKeypadInstance();
    if (!kp) return HOST_ERR_GENERIC;
    cdc::hal::Key k = kp->getNextKey();
    if (k == cdc::hal::Key::KEY_NONE) return HOST_ERR_NOT_FOUND;
    int code = key_to_code(k);
    if (code < 0) return HOST_ERR_NOT_FOUND;
    *out_key = static_cast<uint8_t>(code);
    return HOST_OK;
}
 
}  // extern "C"