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nfc_initiator_target_is_present() allows pnt==NULL

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This commit is contained in:
Philippe Teuwen 2014-01-27 16:07:24 +01:00
parent 7b7f506142
commit d47623319d
2 changed files with 4 additions and 2 deletions
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2
libnfc/chips/pn53x.c
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@ -1729,7 +1729,7 @@ int
pn53x_initiator_target_is_present(struct nfc_device *pnd, const nfc_target *pnt) pn53x_initiator_target_is_present(struct nfc_device *pnd, const nfc_target *pnt)
{ {
// Check if the argument target nt is equals to current saved target // Check if the argument target nt is equals to current saved target
if (!pn53x_current_target_is(pnd, pnt)) { if ((pnt != NULL) && (!pn53x_current_target_is(pnd, pnt))) {
return NFC_ETGRELEASED; return NFC_ETGRELEASED;
} }

4
libnfc/nfc.c
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@ -836,7 +836,9 @@ nfc_initiator_transceive_bytes_timed(nfc_device *pnd,
* @brief Check target presence * @brief Check target presence
* @return Returns 0 on success, otherwise returns libnfc's error code. * @return Returns 0 on success, otherwise returns libnfc's error code.
* *
* This function tests if \a nfc_target is currently present on NFC device. * @param pnd \a nfc_device struct pointer that represent currently used device
* @param pnt a \a nfc_target struct pointer where desired target information was stored (optionnal, can be \e NULL).
* This function tests if \a nfc_target (or last selected tag if \e NULL) is currently present on NFC device.
* @warning The target have to be selected before check its presence * @warning The target have to be selected before check its presence
* @warning To run the test, one or more commands will be sent to target * @warning To run the test, one or more commands will be sent to target
*/ */