Make fifo routines print hex when needed

src/fifo.c

@@ -1,5 +1,6 @@
 #include <hamlib/rig.h>
 #include <stdio.h>
+#include <ctype.h>
 #include "fifo.h"
 
 
@@ -24,8 +25,12 @@ int push(FIFO_RIG *fifo, const char *msg)
     for (int i = 0; i < len; ++i)
     {
         fifo->data[fifo->tail] = msg[i];
+        if (isprint(msg[i]))
         rig_debug(RIG_DEBUG_VERBOSE, "%s: push %c (%d,%d)\n", __func__, msg[i],
                   fifo->head, fifo->tail);
+        else
+        rig_debug(RIG_DEBUG_VERBOSE, "%s: push 0x%02x (%d,%d)\n", __func__, msg[i],
+                  fifo->head, fifo->tail);
 
         if (fifo->tail + 1 == fifo->head) { return -RIG_EDOM; }
 
@@ -42,8 +47,12 @@ int peek(FIFO_RIG *fifo)
     if (fifo->tail > 1023 || fifo->head > 1023) return -1;
     if (fifo->tail == fifo->head) { return -1; }
     char c = fifo->data[fifo->head];
+    if (isprint(c))
     rig_debug(RIG_DEBUG_VERBOSE, "%s: peek %c (%d,%d)\n", __func__, c, fifo->head,
               fifo->tail);
+    else
+    rig_debug(RIG_DEBUG_VERBOSE, "%s: peek 0x%02x (%d,%d)\n", __func__, c, fifo->head,
+              fifo->tail);
     return c;
 }
 
@@ -52,8 +61,12 @@ int pop(FIFO_RIG *fifo)
     if (fifo->tail == fifo->head) { return -1; }
 
     char c = fifo->data[fifo->head];
+    if (isprint(c))
     rig_debug(RIG_DEBUG_VERBOSE, "%s: pop %c (%d,%d)\n", __func__, c, fifo->head,
               fifo->tail);
+    else
+    rig_debug(RIG_DEBUG_VERBOSE, "%s: pop 0x%02x (%d,%d)\n", __func__, c, fifo->head,
+              fifo->tail);
     fifo->head = (fifo->head + 1) % HAMLIB_FIFO_SIZE;
     return c;
 }