add convert_from_utf_to_current_c, fix little warnings

src/charsets.c

@@ -253,7 +253,7 @@ convert_from_input (char *str)
 }
 
 unsigned char
-convert_from_utf_to_current (char *str)
+convert_from_utf_to_current (const char *str)
 {
     if (!str)
         return '.';
@@ -281,4 +281,34 @@ convert_from_utf_to_current (char *str)
 
 }
 
+unsigned char
+convert_from_utf_to_current_c (const int input_char)
+{
+    unsigned char str[2];
+    unsigned char ch = '.';
+    char *cp_to = NULL;
+    GIConv conv;
+    GString *translated_data;
+
+    str[0] = input_char;
+    str[1] = '\0';
+
+    translated_data = g_string_new ("");
+    cp_to = g_strdup ( get_codepage_id ( display_codepage ) );
+    conv = str_crt_conv_to (cp_to);
+
+    if (conv != INVALID_CONV) {
+        if (str_convert (conv, str, translated_data) != ESTR_FAILURE) {
+            ch = translated_data->str[0];
+        } else {
+            ch = '.';
+        }
+        str_close_conv (conv);
+    }
+    g_free (cp_to);
+    g_string_free (translated_data, TRUE);
+    return ch;
+
+}
+
 #endif				/* HAVE_CHARSET */

src/charsets.h

@@ -26,8 +26,8 @@ const char *init_translation_table (int cpsource, int cpdisplay);
 void convert_to_display (char *str);
 void convert_from_input (char *str);
 void convert_string (unsigned char *str);
-unsigned char convert_from_utf_to_current (char *str);
-
+unsigned char convert_from_utf_to_current (const char *str);
+unsigned char convert_from_utf_to_current_c (const int input_char);
 /* Convert single characters */
 static inline int
 convert_to_display_c (int c)