Fix issues in ICU usage

xmpp-vala/src/module/jid.vala

@@ -89,21 +89,23 @@ public class Jid {
     private static string? prepare(string? src, ICU.PrepType type, bool strict = false) throws InvalidJidError {
         if (src == null) return src;
         try {
+            ICU.ParseError error;
             ICU.ErrorCode status = ICU.ErrorCode.ZERO_ERROR;
             ICU.PrepProfile profile = ICU.PrepProfile.openByType(type, ref status);
-            long src16_length = 0;
+            ICU.String src16 = ICU.String.from_string(src);
-            string16 src16 = src.to_utf16(-1, null, out src16_length);
+            int32 dest16_capacity = src16.len() * 2 + 1;
-            ICU.Char[] dest16 = new ICU.Char[src16_length * 2];
+            ICU.String dest16 = ICU.String.alloc(dest16_capacity);
-            ICU.ParseError error;
+            long dest16_length = profile.prepare(src16, src16.len(), dest16, dest16_capacity, strict ? ICU.PrepOptions.DEFAULT : ICU.PrepOptions.ALLOW_UNASSIGNED, out error, ref status);
-            long dest16_length = profile.prepare((ICU.Char*) src16, (int32) src16_length, dest16, dest16.length, strict ? ICU.PrepOptions.DEFAULT : ICU.PrepOptions.ALLOW_UNASSIGNED, out error, ref status);
             if (status == ICU.ErrorCode.INVALID_CHAR_FOUND) {
                 throw new InvalidJidError.INVALID_CHAR("Found invalid character");
+            } else if (status == ICU.ErrorCode.STRINGPREP_PROHIBITED_ERROR) {
+                throw new InvalidJidError.INVALID_CHAR("Found prohibited character");
             } else if (status != ICU.ErrorCode.ZERO_ERROR) {
                 throw new InvalidJidError.UNKNOWN(@"Unknown error: $(status.errorName())");
             } else if (dest16_length < 0) {
                 throw new InvalidJidError.UNKNOWN("Unknown error");
             }
-            return ((string16) dest16).to_utf8(dest16_length, null, null);
+            return dest16.to_string();
         } catch (ConvertError e) {
             throw new InvalidJidError.INVALID_CHAR(@"Conversion error: $(e.message)");
         }

xmpp-vala/tests/jid.vala

@@ -10,6 +10,7 @@ class JidTest : Gee.TestCase {
         add_test("jid_valid_full", () => { test_jid_valid("test@example.com/test"); });
 
         // These should not be valid in "strict-mode"
+        add_test("jid_valid_emoji_only", () => { test_jid_valid("😅"); });
         add_test("jid_valid_emoji_local", () => { test_jid_valid("😅@example.com"); });
         add_test("jid_valid_emoji_resource", () => { test_jid_valid("test@example.com/😅"); });
         add_test("jid_valid_emoji_domain", () => { test_jid_valid("test@😅.com"); });
@@ -66,7 +67,7 @@ class JidTest : Gee.TestCase {
             var t2 = new Jid(jid2);
             fail_if_not_eq_str(t1.to_string(), t2.to_string());
         } catch (Error e) {
-            fail_if_reached();
+            fail_if_reached(@"Throws $(e.message)");
         }
     }
 
@@ -75,7 +76,7 @@ class JidTest : Gee.TestCase {
             var t1 = new Jid(jid1);
             fail_if_not_eq_str(t1.to_string(), jid2);
         } catch (Error e) {
-            fail_if_reached();
+            fail_if_reached(@"Throws $(e.message)");
         }
     }
 
@@ -85,7 +86,7 @@ class JidTest : Gee.TestCase {
             var t2 = new Jid(jid2);
             fail_if_eq_str(t1.to_string(), t2.to_string());
         } catch (Error e) {
-            fail_if_reached();
+            fail_if_reached(@"Throws $(e.message)");
         }
     }
 }

xmpp-vala/vapi/icu-uc.vapi

@@ -1,15 +1,57 @@
+[CCode (cprefix="u_")]
 namespace ICU {
 
 [CCode (cname = "UChar")]
 [IntegerType (rank = 5, min = 0, max = 65535)]
 struct Char {}
 
+[CCode (cname = "UChar*", destroy_function="g_free", has_type_id = false)]
+[SimpleType]
+struct String {
+    public static String alloc(int32 length) {
+        return (String) (Char*) new Char[length];
+    }
+
+    public static String from_string(string src) throws GLib.ConvertError {
+        ErrorCode status = ErrorCode.ZERO_ERROR;
+        int32 dest_capacity = src.length * 2 + 1;
+        String dest = alloc(dest_capacity);
+        int32 dest_length;
+        strFromUTF8(dest, dest_capacity, out dest_length, src, src.length, ref status);
+        if (status.is_failure()) {
+            throw new GLib.ConvertError.FAILED(status.errorName());
+        }
+        return dest;
+    }
+
+    public string to_string() throws GLib.ConvertError {
+        ErrorCode status = ErrorCode.ZERO_ERROR;
+        uint8[] dest = new uint8[len() * 4 + 1];
+        int32 dest_length;
+        strToUTF8(dest, out dest_length, this, -1, ref status);
+        if (status.is_failure()) {
+            throw new GLib.ConvertError.FAILED(status.errorName());
+        }
+        dest[dest_length] = 0;
+        return (string) dest;
+    }
+
+    [CCode (cname = "u_strlen")]
+    public int32 len();
+
+    [CCode (cname="u_strFromUTF8")]
+    private static void strFromUTF8(String dest, int32 dest_capacity, out int32 dest_length, string src, int32 src_length, ref ErrorCode status);
+    [CCode (cname="u_strToUTF8")]
+    private static void strToUTF8(uint8[] dest, out int32 dest_length, String src, int32 src_length, ref ErrorCode status);
+}
+
 [CCode (cname = "UErrorCode", cprefix = "U_", cheader_filename = "unicode/utypes.h")]
 enum ErrorCode {
     ZERO_ERROR,
     INVALID_CHAR_FOUND,
     INDEX_OUTOFBOUNDS_ERROR,
     BUFFER_OVERFLOW_ERROR,
+    STRINGPREP_PROHIBITED_ERROR,
     UNASSIGNED_CODE_POINT_FOUND,
     IDNA_STD3_ASCII_RULES_ERROR
     ;
@@ -21,7 +63,7 @@ enum ErrorCode {
     public bool is_failure();
 }
 
-[CCode (cname = "UErrorCode", cprefix = "U_", cheader_filename = "unicode/parseerr.h")]
+[CCode (cname = "UParseError", cprefix = "U_", cheader_filename = "unicode/parseerr.h")]
 struct ParseError {}
 
 [CCode (cname = "UStringPrepProfile", cprefix = "usprep_", free_function = "usprep_close", cheader_filename = "unicode/usprep.h")]
@@ -29,7 +71,7 @@ struct ParseError {}
 class PrepProfile {
     public static PrepProfile open(string path, string file_name, ref ErrorCode status);
     public static PrepProfile openByType(PrepType type, ref ErrorCode status);
-    public int32 prepare(Char* src, int32 src_length, Char* dest, int32 dest_capacity, PrepOptions options, out ParseError parse_error, ref ErrorCode status);
+    public int32 prepare(String src, int32 src_length, String dest, int32 dest_capacity, PrepOptions options, out ParseError parse_error, ref ErrorCode status);
 }
 [CCode (cname = "UStringPrepProfileType", cprefix = "USPREP_")]
 enum PrepType {