Move the string parser with regexp from huawei plugin to generic utility function.

It's useful for other modems too that need to strip unsolicited messages from
responses.

plugins/mm-modem-huawei.c

@@ -7,6 +7,7 @@
 #include "mm-modem-gsm-network.h"
 #include "mm-errors.h"
 #include "mm-callback-info.h"
+#include "mm-util.h"
 #include "mm-serial-parsers.h"
 
 static gpointer mm_modem_huawei_parent_class = NULL;
@@ -406,63 +407,13 @@ reg_state_changed (const char *str, gpointer data)
     mm_generic_gsm_set_reg_status (MM_GENERIC_GSM (data), status);
 }
 
-static gboolean
-remove_eval_cb (const GMatchInfo *match_info,
-                GString *result,
-                gpointer user_data)
-{
-    int *result_len = (int *) user_data;
-    int start;
-    int end;
-
-    if (g_match_info_fetch_pos  (match_info, 0, &start, &end))
-        *result_len -= (end - start);
-
-    return FALSE;
-}
-
-typedef void (*HuaweiStripFn) (const char *str, gpointer data);
-
-static void
-huawei_strip (GRegex *r, GString *string, HuaweiStripFn fn, gpointer data)
-{
-    GMatchInfo *match_info;
-    gboolean matches;
-    char *str;
-
-    matches = g_regex_match_full (r, string->str, string->len, 0, 0, &match_info, NULL);
-    if (fn) {
-        while (g_match_info_matches (match_info)) {
-            str = g_match_info_fetch (match_info, 1);
-            fn (str, data);
-            g_free (str);
-
-            g_match_info_next (match_info, NULL);
-        }
-    }
-
-    g_match_info_free (match_info);
-
-    if (matches) {
-        /* Remove matches */
-        int result_len = string->len;
-
-        str = g_regex_replace_eval (r, string->str, string->len, 0, 0,
-                                    remove_eval_cb, &result_len, NULL);
-
-        g_string_truncate (string, 0);
-        g_string_append_len (string, str, result_len);
-        g_free (str);
-    }
-}
-
 static gboolean
 huawei_parse_response (gpointer data, GString *response, GError **error)
 {
     MMModemHuaweiPrivate *priv = MM_MODEM_HUAWEI_GET_PRIVATE (data);
 
-    huawei_strip (priv->status_regex, response, handle_status_change, data);
+    mm_util_strip_string (response, priv->status_regex, handle_status_change, data);
-    huawei_strip (priv->reg_state_regex, response, reg_state_changed, data);
+    mm_util_strip_string (response, priv->reg_state_regex, reg_state_changed, data);
 
     return mm_serial_parser_v1_parse (priv->std_parser, response, error);
 }

src/Makefile.am

@@ -36,7 +36,9 @@ modem_manager_SOURCES = \
 	mm-serial.c \
 	mm-serial.h \
 	mm-serial-parsers.c \
-	mm-serial-parsers.h
+	mm-serial-parsers.h \
+	mm-util.c \
+	mm-util.h
 
 mm-manager-glue.h: $(top_srcdir)/introspection/mm-manager.xml
 	dbus-binding-tool --prefix=mm_manager --mode=glib-server --output=$@ $<

src/mm-util.c

@@ -0,0 +1,54 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+#include "mm-util.h"
+
+static gboolean
+remove_eval_cb (const GMatchInfo *match_info,
+                GString *result,
+                gpointer user_data)
+{
+    int *result_len = (int *) user_data;
+    int start;
+    int end;
+
+    if (g_match_info_fetch_pos  (match_info, 0, &start, &end))
+        *result_len -= (end - start);
+
+    return FALSE;
+}
+
+void
+mm_util_strip_string (GString *string,
+                      GRegex *regex,
+                      MMUtilStripFn callback,
+                      gpointer user_data)
+{
+    GMatchInfo *match_info;
+    gboolean matches;
+    char *str;
+
+    matches = g_regex_match_full (regex, string->str, string->len, 0, 0, &match_info, NULL);
+    if (callback) {
+        while (g_match_info_matches (match_info)) {
+            str = g_match_info_fetch (match_info, 1);
+            callback (str, user_data);
+            g_free (str);
+
+            g_match_info_next (match_info, NULL);
+        }
+    }
+
+    g_match_info_free (match_info);
+
+    if (matches) {
+        /* Remove matches */
+        int result_len = string->len;
+
+        str = g_regex_replace_eval (regex, string->str, string->len, 0, 0,
+                                    remove_eval_cb, &result_len, NULL);
+
+        g_string_truncate (string, 0);
+        g_string_append_len (string, str, result_len);
+        g_free (str);
+    }
+}

src/mm-util.h

@@ -0,0 +1,20 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+#ifndef MM_UTIL_H
+#define MM_UTIL_H
+
+#include <glib.h>
+
+typedef void (*MMUtilStripFn) (const char *str,
+                               gpointer user_data);
+
+/* Applies the regexp on string and calls the callback (if provided)
+   with each match and user_data. After that, the matches are removed
+   from the string.
+*/
+void mm_util_strip_string (GString *string,
+                           GRegex *regex,
+                           MMUtilStripFn callback,
+                           gpointer user_data);
+
+#endif /* MM_UTIL_H */