Fix empty key list bug in mfkeys.lua (#579)

[proxmark3-svn] / client / ui.c

diff --git a/client/ui.c b/client/ui.c
index 05e29dc70d927e48264f049fa41164c06c2dd32c..dc122d2f17acc04cd405d093dc4bb540e83c7355 100644 (file)
--- a/client/ui.c
+++ b/client/ui.c
@@ -9,12 +9,14 @@
 // UI utilities
 //-----------------------------------------------------------------------------
 
-#include <stdarg.h>
+#include <stdbool.h>
+#ifndef EXTERNAL_PRINTANDLOG
 #include <stdlib.h>
 #include <stdio.h>
-#include <stdbool.h>
+#include <stdarg.h>
 #include <readline/readline.h>
 #include <pthread.h>
+#endif
 
 #include "ui.h"
 
@@ -26,10 +28,12 @@ int GridOffset = 0;
 bool GridLocked = false;
 bool showDemod = true;
 
-extern pthread_mutex_t print_lock;
-
 static char *logfilename = "proxmark3.log";
 
+#ifndef EXTERNAL_PRINTANDLOG
+// Declared in proxmark3.c
+extern pthread_mutex_t print_lock;
+
 void PrintAndLog(char *fmt, ...)
 {
        char *saved_line;
@@ -48,7 +52,12 @@ void PrintAndLog(char *fmt, ...)
                        logging=0;
                }
        }
-       
+
+       // If there is an incoming message from the hardware (eg: lf hid read) in
+       // the background (while the prompt is displayed and accepting user input),
+       // stash the prompt and bring it back later.
+#ifdef RL_STATE_READCMD
+       // We are using GNU readline. libedit (OSX) doesn't support this flag.
        int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
 
        if (need_hack) {
@@ -58,6 +67,7 @@ void PrintAndLog(char *fmt, ...)
                rl_replace_line("", 0);
                rl_redisplay();
        }
+#endif
        
        va_start(argptr, fmt);
        va_copy(argptr2, argptr);
@@ -66,6 +76,8 @@ void PrintAndLog(char *fmt, ...)
        va_end(argptr);
        printf("\n");
 
+#ifdef RL_STATE_READCMD
+       // We are using GNU readline. libedit (OSX) doesn't support this flag.
        if (need_hack) {
                rl_restore_prompt();
                rl_replace_line(saved_line, 0);
@@ -73,6 +85,7 @@ void PrintAndLog(char *fmt, ...)
                rl_redisplay();
                free(saved_line);
        }
+#endif
        
        if (logging && logfile) {
                vfprintf(logfile, fmt, argptr2);
@@ -88,7 +101,7 @@ void PrintAndLog(char *fmt, ...)
        //release lock
        pthread_mutex_unlock(&print_lock);  
 }
-
+#endif
 
 void SetLogFilename(char *fn)
 {