utils: new utils_check_for_single_value() method

It was being used in several places with different static implementations

src/mm-generic-gsm.c

@@ -3792,24 +3792,6 @@ set_charset_done (MMAtSerialPort *port,
         mm_at_serial_port_queue_command (port, "+CSCS?", 3, set_get_charset_done, info);
 }
 
-static gboolean
-check_for_single_value (guint32 value)
-{
-    gboolean found = FALSE;
-    guint32 i;
-
-    for (i = 1; i <= 32; i++) {
-        if (value & 0x1) {
-            if (found)
-                return FALSE;  /* More than one bit set */
-            found = TRUE;
-        }
-        value >>= 1;
-    }
-
-    return TRUE;
-}
-
 static void
 set_charset (MMModem *modem,
              MMModemCharset charset,
@@ -3824,7 +3806,7 @@ set_charset (MMModem *modem,
 
     info = mm_callback_info_new (modem, callback, user_data);
 
-    if (!(priv->charsets & charset) || !check_for_single_value (charset)) {
+    if (!(priv->charsets & charset) || !utils_check_for_single_value (charset)) {
         info->error = g_error_new (MM_MODEM_ERROR,
                                    MM_MODEM_ERROR_UNSUPPORTED_CHARSET,
                                    "Character set 0x%X not supported",

src/mm-modem-gsm-network.c

@@ -21,6 +21,7 @@
 #include "mm-errors.h"
 #include "mm-callback-info.h"
 #include "mm-marshal.h"
+#include "mm-utils.h"
 
 static void impl_gsm_modem_register (MMModemGsmNetwork *modem,
                                      const char *network_id,
@@ -473,24 +474,6 @@ impl_gsm_modem_get_signal_quality (MMModemGsmNetwork *modem,
     mm_modem_gsm_network_get_signal_quality (modem, uint_call_done, context);
 }
 
-static gboolean
-check_for_single_value (guint32 value)
-{
-    gboolean found = FALSE;
-    guint32 i;
-
-    for (i = 1; i <= 32; i++) {
-        if (value & 0x1) {
-            if (found)
-                return FALSE;  /* More than one bit set */
-            found = TRUE;
-        }
-        value >>= 1;
-    }
-
-    return TRUE;
-}
-
 static void
 impl_gsm_modem_set_band (MMModemGsmNetwork *modem,
                          MMModemGsmBand band,
@@ -511,7 +494,7 @@ impl_gsm_modem_set_network_mode (MMModemGsmNetwork *modem,
                                  MMModemDeprecatedMode old_mode,
                                  DBusGMethodInvocation *context)
 {
-    if (!check_for_single_value (old_mode)) {
+    if (!utils_check_for_single_value (old_mode)) {
         GError *error;
 
         error = g_error_new_literal (MM_MODEM_ERROR, MM_MODEM_ERROR_OPERATION_NOT_SUPPORTED,

src/mm-utils.c

@@ -90,3 +90,20 @@ utils_bin2hexstr (const guint8 *bin, gsize len)
     return g_string_free (ret, FALSE);
 }
 
+gboolean
+utils_check_for_single_value (guint32 value)
+{
+    gboolean found = FALSE;
+    guint32 i;
+
+    for (i = 1; i <= 32; i++) {
+        if (value & 0x1) {
+            if (found)
+                return FALSE;  /* More than one bit set */
+            found = TRUE;
+        }
+        value >>= 1;
+    }
+
+    return TRUE;
+}

src/mm-utils.h

@@ -22,5 +22,7 @@ char *utils_hexstr2bin (const char *hex, gsize *out_len);
 
 char *utils_bin2hexstr (const guint8 *bin, gsize len);
 
+gboolean utils_check_for_single_value (guint32 value);
+
 #endif  /* MM_UTILS_H */