From 00893e79fc62966067af1a106567db96bd170338 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= <debian@jff.email>
Date: Sun, 3 Mar 2024 19:11:32 +0100
Subject: New upstream version 1.2

---
 tests/unistr/test-u8-mbtouc.c | 85 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 81 insertions(+), 4 deletions(-)

(limited to 'tests/unistr/test-u8-mbtouc.c')

diff --git a/tests/unistr/test-u8-mbtouc.c b/tests/unistr/test-u8-mbtouc.c
index 39bcaef9..c063c9ab 100644
--- a/tests/unistr/test-u8-mbtouc.c
+++ b/tests/unistr/test-u8-mbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u8_mbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -34,9 +34,18 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
      that a "malformed sequence" is interpreted in the same way as
      "a character that is outside the adopted subset".
      Reference:
+       ISO 10646-1 amendment 2
+       <https://www.cl.cam.ac.uk/~mgk25/ucs/ISO-10646-UTF-8.html>
        Markus Kuhn: UTF-8 decoder capability and stress test
        <https://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt>
        <https://www.w3.org/2001/06/utf-8-wrong/UTF-8-test.html>
+     These old specifications (from ca. 2000) were a bit ambiguous, and the
+     definition of UTF-8 has changed a bit as well.  The newer specification
+     we obey is the Unicode Standard, version 15.
+     Reference:
+       Unicode Standard 15.0.0, section 3.9
+       <https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf>
+       pages 124..129, especially table 3-7.
    */
   /* 3.1. Test that each unexpected continuation byte is signalled as a
      malformed sequence of its own.  */
@@ -118,7 +127,7 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
   }
   /* 3.3.2. 3-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
+    static const uint8_t input[] = { '"', 0xE0, 0xA0, '"' };
     uc = 0xBADFACE;
     ret = my_u8_mbtouc (&uc, input, 4);
     ASSERT (ret == 1);
@@ -132,6 +141,26 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
     ASSERT (ret == 1);
     ASSERT (uc == 0x0022);
   }
+  {
+    /* Outdated example: 0xE0 0x80 is an ill-formed sequence.  */
+    static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input, 4);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 1, 3);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 2, 2);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 3, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+  }
   /* 3.3.7. 3-byte sequence with last byte missing.  */
   {
     static const uint8_t input[] = { '"', 0xEF, 0xBF, '"' };
@@ -150,7 +179,7 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
   }
   /* 3.3.3. 4-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
+    static const uint8_t input[] = { '"', 0xF0, 0x90, 0x80, '"' };
     uc = 0xBADFACE;
     ret = my_u8_mbtouc (&uc, input, 5);
     ASSERT (ret == 1);
@@ -164,9 +193,33 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
     ASSERT (ret == 1);
     ASSERT (uc == 0x0022);
   }
+  {
+    /* Outdated example: 0xF0 0x80 is an ill-formed sequence.  */
+    static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input, 5);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 1, 4);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 2, 3);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 3, 2);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 4, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+  }
   /* 3.3.8. 4-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
+    static const uint8_t input[] = { '"', 0xF3, 0xBF, 0xBF, '"' };
     uc = 0xBADFACE;
     ret = my_u8_mbtouc (&uc, input, 5);
     ASSERT (ret == 1);
@@ -180,6 +233,30 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
     ASSERT (ret == 1);
     ASSERT (uc == 0x0022);
   }
+  {
+    /* Outdated example: 0xF7 is an invalid first byte.  */
+    static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input, 5);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 1, 4);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 2, 3);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 3, 2);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 4, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+  }
 }
 
 int
-- 
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