modem-helpers: Add regex to parse CBM out of the serial stream

This will allow us to fetch cell broadcast messages.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

src/mm-modem-helpers.c

@@ -968,6 +968,16 @@ mm_3gpp_cds_regex_get (void)
                         NULL);
 }
 
+GRegex *
+mm_3gpp_cbm_regex_get (void)
+{
+    /* +CBM: <length><CR><LF><PDU> */
+    return g_regex_new ("\\r\\n\\+CBM:\\s*(\\d+)\\r\\n(.*)\\r\\n",
+                        G_REGEX_RAW | G_REGEX_OPTIMIZE,
+                        0,
+                        NULL);
+}
+
 /*************************************************************************/
 /* AT+WS46=? response parser
  *

src/mm-modem-helpers.h

@@ -142,6 +142,7 @@ GRegex    *mm_3gpp_cgev_regex_get (void);
 GRegex    *mm_3gpp_cusd_regex_get (void);
 GRegex    *mm_3gpp_cmti_regex_get (void);
 GRegex    *mm_3gpp_cds_regex_get (void);
+GRegex    *mm_3gpp_cbm_regex_get (void);
 
 /* AT+WS46=? response parser: returns array of MMModemMode values */
 GArray *mm_3gpp_parse_ws46_test_response (const gchar  *response,