From 3dae62387990746f26cc3d931bf5532652791a97 Mon Sep 17 00:00:00 2001
From: djcb <djcb@djcbsoftware.nl>
Date: Sun, 26 May 2013 11:16:02 -0700
Subject: [PATCH] * add mu_str_replace

---
 lib/mu-str.c            | 27 +++++++++++++++++++++++++++
 lib/mu-str.h            | 16 ++++++++++++++++
 lib/tests/test-mu-str.c | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 75 insertions(+)

diff --git a/lib/mu-str.c b/lib/mu-str.c
index 28d4f317..803c7fb7 100644
--- a/lib/mu-str.c
+++ b/lib/mu-str.c
@@ -199,6 +199,33 @@ mu_str_size_parse_bkm (const char* str)
 }
 
 
+char*
+mu_str_replace (const char *str, const char *substr, const char *repl)
+{
+	GString		*gstr;
+	const char	*cur;
+
+	g_return_val_if_fail (str, NULL);
+	g_return_val_if_fail (substr, NULL);
+	g_return_val_if_fail (repl, NULL);
+
+	gstr = g_string_sized_new (2 * strlen (str));
+
+	for (cur = str; *cur; ++cur) {
+		if (g_str_has_prefix (cur, substr)) {
+			g_string_append (gstr, repl);
+			cur += strlen (substr) - 1;
+		} else
+			g_string_append_c (gstr, *cur);
+	}
+
+	return g_string_free (gstr, FALSE);
+}
+
+
+
+
+
 
 char*
 mu_str_from_list (const GSList *lst, char sepa)
diff --git a/lib/mu-str.h b/lib/mu-str.h
index 99684d83..23adb39e 100644
--- a/lib/mu-str.h
+++ b/lib/mu-str.h
@@ -75,6 +75,21 @@ char *mu_str_display_contact (const char *str) G_GNUC_WARN_UNUSED_RESULT;
 const char* mu_str_size_s  (size_t s) G_GNUC_CONST;
 char*       mu_str_size    (size_t s) G_GNUC_WARN_UNUSED_RESULT;
 
+
+
+
+/**
+ * Replace all occurences of substr in str with repl
+ *
+ * @param str a string
+ * @param substr some string to replace
+ * @param repl a replacement string
+ *
+ * @return a newly allocated string with the substr replaced by repl; free with g_free
+ */
+char *mu_str_replace (const char *str, const char *substr, const char *repl);
+
+
 /**
  * get a display string for a given set of flags, OR'ed in
  * @param flags; one character per flag:
@@ -326,6 +341,7 @@ const gchar* mu_str_subject_normalize (const gchar* str);
  */
 gchar* mu_str_quoted_from_strv (const gchar **params);
 
+
 /** @} */
 
 G_END_DECLS
diff --git a/lib/tests/test-mu-str.c b/lib/tests/test-mu-str.c
index d6a87a0b..cfdf23a7 100644
--- a/lib/tests/test-mu-str.c
+++ b/lib/tests/test-mu-str.c
@@ -431,6 +431,35 @@ test_mu_term_fixups (void)
 
 
 
+
+
+static void
+test_mu_str_replace (void)
+{
+	unsigned u;
+	struct {
+		const char*  str;
+		const char* sub;
+		const char *repl;
+		const char *exp;
+	} strings [] = {
+		{ "hello", "ll", "xx", "hexxo" },
+		{ "hello", "hello", "hi", "hi" },
+		{ "hello", "foo", "bar", "hello" }
+	};
+
+	for (u = 0; u != G_N_ELEMENTS(strings); ++u) {
+		char *res;
+		res = mu_str_replace (strings[u].str,
+				      strings[u].sub,
+				      strings[u].repl);
+		g_assert_cmpstr (res,==,strings[u].exp);
+		g_free (res);
+	}
+}
+
+
+
 int
 main (int argc, char *argv[])
 {
@@ -471,6 +500,9 @@ main (int argc, char *argv[])
 	g_test_add_func ("/mu-str/mu-str-esc-to-list",
 			 test_parse_arglist);
 
+	g_test_add_func ("/mu-str/mu-str-replace",
+			 test_mu_str_replace);
+
 	g_test_add_func ("/mu-str/mu-str-esc-to-list",
 			 test_mu_str_esc_to_list);