Replace spaces in string parsing with non-printable 0x7F for correct passthrough in radio

DSP_API/SmartSDR_Interface/cmd_basics.c

@@ -265,6 +265,7 @@ uint32 cmd_slice(int requester_fd, int argc, char **argv)
         if(strncmp(argv[2], "string", strlen("string")) == 0)
         {
             char* new_string = argv[2]+strlen("string")+1;
+            charReplace(new_string, (char) 0x7F, ' ');
             freedv_set_string(slc, new_string);
             return SUCCESS;
         }

DSP_API/SmartSDR_Interface/sched_waveform.c

@@ -196,8 +196,14 @@ Circular_Float_Buffer TX4_cb = &tx4_cb;
 void my_put_next_rx_char(void *callback_state, char c)
 {
     char new_char[2];
-    new_char[0] = c;
+    if ( c == ' ' ) {
+    	/* Encode spaces differently */
+    	new_char[0] = (char) 0x7F;
+    } else {
+    	new_char[0] = c;
+    }
     new_char[1] = 0;
+
     strncat(_rx_string, new_char, MAX_RX_STRING_LENGTH+4);
     if (strlen(_rx_string) > MAX_RX_STRING_LENGTH)
     {

DSP_API/SmartSDR_Interface/smartsdr_dsp_api.c

@@ -177,7 +177,7 @@ uint32 register_mode(void)
 
     }
     /* Transfer data expecting to encounter end of input (or an error) */
-    inputBuffer = (char *) malloc (nbytes + 1); // Initial buffer size
+    inputBuffer = (char *) safe_malloc (nbytes + 1); // Initial buffer size
 
     readFlag = TRUE;
     while(readFlag)     // Look for the start of the [header]
@@ -186,6 +186,7 @@ uint32 register_mode(void)
         if (numRead == -1)
         {
             output(ANSI_YELLOW"Error reading config file %s\n", cfg_file);
+            safe_free(inputBuffer);
             return 999;
         }
 

DSP_API/SmartSDR_Interface/utils.c

@@ -140,3 +140,19 @@ void printIP(uint32 ip)
 	output("%d.%d.%d.%d\n",((ip>>24)& 0xFF),((ip>>16)& 0xFF),((ip>>8)& 0xFF),(ip & 0xFF));
 }
 
+void charReplace( char * string, char oldChar, char newChar )
+{
+	if ( string == NULL ) {
+		output("Null string passed to charReplace\n");
+		return ;
+	}
+
+	while (*string != 0 ) {
+		if ( *string == oldChar )
+			*string = newChar;
+
+		string++;
+	}
+
+}
+

DSP_API/SmartSDR_Interface/utils.h

@@ -45,5 +45,6 @@ void lock_malloc_init(void);
 void* safe_malloc(size_t size);
 void safe_free(void* ptr);
 void printIP(uint32 ip);
+void charReplace( char * string, char oldChar, char newChar );
 
 #endif /* UTILS_H_ */