Use C99 standard bool type instead of locally defined one.

Check for types in configure pass.
Fix a warning related to nfc_reader_select() (a length - uiInitDataLen - was set by NULL instead of 0).

src/anticol.c

@@ -22,6 +22,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdlib.h>
 #include <stddef.h>
 #include <stdint.h>
+#include <stdbool.h>
+
 #include <string.h>
 
 #include "libnfc.h"

src/dev_acr122.h

@@ -22,6 +22,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define _LIBNFC_DEV_ACR122_H_
 
 #include <stdint.h>
+#include <stdbool.h>
 
 #include "defines.h"
 #include "types.h"

src/dev_pn531.h

@@ -22,6 +22,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define _LIBNFC_DEV_PN531_H_
 
 #include <stdint.h>
+#include <stdbool.h>
 
 #include "defines.h"
 #include "types.h"

src/libnfc.h

@@ -22,6 +22,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define _LIBNFC_H_
 
 #include <stdint.h>
+#include <stdbool.h>
 
 #include "defines.h"
 #include "types.h"

src/list.c

@@ -59,7 +59,7 @@ int main(int argc, const char* argv[])
   printf("\nConnected to NFC reader: %s\n\n",pdi->acName);
   
   // Poll for a ISO14443A (MIFARE) tag
-  if (nfc_reader_select(pdi,IM_ISO14443A_106,NULL,NULL,&ti))
+  if (nfc_reader_select(pdi,IM_ISO14443A_106,NULL,0,&ti))
   {
     printf("The following (NFC) ISO14443A tag was found:\n\n");
     printf("    ATQA (SENS_RES): "); print_hex(ti.tia.abtAtqa,2);
@@ -81,14 +81,14 @@ int main(int argc, const char* argv[])
   }
 
   // Poll for a ISO14443B tag
-  if (nfc_reader_select(pdi,IM_ISO14443B_106,NULL,NULL,&ti))
+  if (nfc_reader_select(pdi,IM_ISO14443B_106,NULL,0,&ti))
   {
     // No test results yet
     printf("iso14443b\n");
   }
 
   // Poll for a Jewel tag
-  if (nfc_reader_select(pdi,IM_JEWEL_106,NULL,NULL,&ti))
+  if (nfc_reader_select(pdi,IM_JEWEL_106,NULL,0,&ti))
   {
     // No test results yet
     printf("jewel\n");

src/mftool.c

@@ -22,6 +22,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdlib.h>
 #include <stdint.h>
 #include <stddef.h>
+#include <stdbool.h>
 
 #include <string.h>
 #include <ctype.h>
@@ -74,7 +75,7 @@ bool read_card()
       {
         printf("x");
         // When a failure occured we need to redo the anti-collision
-        if (!nfc_reader_select(pdi,IM_ISO14443A_106,NULL,NULL,&ti))
+        if (!nfc_reader_select(pdi,IM_ISO14443A_106,NULL,0,&ti))
         {
           printf("!\nError: tag was removed\n");
           return 1;
@@ -157,7 +158,7 @@ bool write_card()
       {
         printf("x");
         // When a failure occured we need to redo the anti-collision
-        if (!nfc_reader_select(pdi,IM_ISO14443A_106,NULL,NULL,&ti))
+        if (!nfc_reader_select(pdi,IM_ISO14443A_106,NULL,0,&ti))
         {
           printf("!\nError: tag was removed\n");
           return false;
@@ -312,7 +313,7 @@ int main(int argc, const char* argv[])
   printf("Connected to NFC reader: %s\n",pdi->acName);
 
   // Try to find a MIFARE Classic tag
-  if (!nfc_reader_select(pdi,IM_ISO14443A_106,NULL,NULL,&ti))
+  if (!nfc_reader_select(pdi,IM_ISO14443A_106,NULL,0,&ti))
   {
     printf("Error: no tag was found\n");
     nfc_disconnect(pdi);

src/types.h

@@ -22,17 +22,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define _LIBNFC_TYPES_H_
 
 #include <stdint.h>
+#include <stdbool.h>
 
 #include "defines.h"
 
 // Compiler directive, set struct alignment to 1 byte for compatibility
 #pragma pack(1)
 
-typedef enum {
-  false = 0x00,
-  true  = 0x01
-} bool;
-
 typedef enum {
   CT_PN531                    = 0x10,
   CT_PN532                    = 0x20,