Imported Upstream version 0.9.6upstream/0.9.6

1 files changed, 161 insertions, 0 deletions

diff --git a/tests/unistr/test-strchr.h b/tests/unistr/test-strchr.h
new file mode 100644
index 00000000..191d74e3
--- /dev/null
+++ b/tests/unistr/test-strchr.h
@@ -0,0 +1,161 @@
+/* Test of uN_strchr() functions.
+   Copyright (C) 2008-2015 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
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini <bonzini@gnu.org>, 2010.
+   Based on test-chr.h, by Eric Blake and Bruno Haible.  */
+
+static void
+test_strchr (void)
+{
+  size_t size = 0x100000;
+  size_t length;
+  size_t i;
+  UNIT *input;
+  uint32_t *input32 = (uint32_t *) malloc ((size + 1) * sizeof (uint32_t));
+  ASSERT (input32);
+
+  input32[0] = 'a';
+  input32[1] = 'b';
+  u32_set (input32 + 2, 'c', 1024);
+  for (i = 1026; i < size - 2; i += 63)
+    {
+      size_t last = i + 63 < size - 2 ? i + 63 : size - 2;
+      ucs4_t uc = 'd' | (i - 1026);
+      if (uc >= 0xd800 && uc <= 0xdfff)
+        uc |= 0x100000;
+      u32_set (input32 + i, uc, last - i);
+    }
+  input32[size - 2] = 'e';
+  input32[size - 1] = 'a';
+  input32[size] = 0;
+
+  input = U32_TO_U (input32, size + 1, NULL, &length);
+  ASSERT (input);
+
+  /* Basic behavior tests.  */
+  ASSERT (U_STRCHR (input, 'a') == input);
+  ASSERT (U_STRCHR (input, 'b') == input + 1);
+  ASSERT (U_STRCHR (input, 'c') == input + 2);
+
+  {
+    UNIT *exp = input + 1026;
+    UNIT *prev = input + 2;
+
+    for (i = 1026; i < size - 2; i += 63)
+      {
+        UNIT c[6];
+        size_t n;
+        ucs4_t uc = 'd' | (i - 1026);
+        if (uc >= 0xd800 && uc <= 0xdfff)
+          uc |= 0x100000;
+        n = U_UCTOMB (c, uc, 6);
+        ASSERT (exp < input + length - 2);
+        ASSERT (U_STRCHR (prev, uc) == exp);
+        ASSERT (memcmp (exp, c, n * sizeof (UNIT)) == 0);
+        prev = exp;
+        exp += n * 63;
+      }
+  }
+
+  ASSERT (U_STRCHR (input + 1, 'a') == input + length - 2);
+  ASSERT (U_STRCHR (input + 1, 'e') == input + length - 3);
+
+  ASSERT (U_STRCHR (input, 'f') == NULL);
+  ASSERT (U_STRCHR (input, '\0') == input + length - 1);
+
+  /* Check that a very long haystack is handled quickly if the byte is
+     found near the beginning.  */
+  {
+    size_t repeat = 10000;
+    for (; repeat > 0; repeat--)
+      {
+        ASSERT (U_STRCHR (input, 'c') == input + 2);
+      }
+  }
+
+  /* Alignment tests.  */
+  {
+    int i, j;
+    for (i = 0; i < 32; i++)
+      {
+        for (j = 0; j < 127; j++)
+          input[i + j] = j + 1;
+        input[i + 128] = 0;
+        for (j = 0; j < 127; j++)
+          {
+            ASSERT (U_STRCHR (input + i, j + 1) == input + i + j);
+          }
+      }
+  }
+
+  /* Check that uN_strchr() does not read past the end of the string.  */
+  {
+    char *page_boundary = (char *) zerosize_ptr ();
+    size_t n;
+
+    if (page_boundary != NULL)
+      {
+        for (n = 2; n <= 500 / sizeof (UNIT); n++)
+          {
+            UNIT *mem = (UNIT *) (page_boundary - n * sizeof (UNIT));
+            U_SET (mem, 'X', n - 2);
+            mem[n - 2] = 0;
+            ASSERT (U_STRCHR (mem, 'U') == NULL);
+            mem[n - 2] = 'X';
+            mem[n - 1] = 0;
+            ASSERT (U_STRCHR (mem, 'U') == NULL);
+          }
+      }
+  }
+
+#if 0
+  /* This check is disabled, because uN_strchr() is allowed to read past the
+     first occurrence of the byte being searched.  In fact, u8_strchr() does
+     so, on i586 glibc systems: u8_strchr calls strchr, which in
+     glibc/sysdeps/i386/i586/strchr.S loads the second word before the
+     handling of the first word has been completed.  */
+  /* Check that uN_strchr() does not read past the first occurrence of the
+     byte being searched.  */
+  {
+    char *page_boundary = (char *) zerosize_ptr ();
+    size_t n;
+
+    if (page_boundary != NULL)
+      {
+        for (n = 2; n <= 500 / sizeof (UNIT); n++)
+          {
+            UNIT *mem = (UNIT *) (page_boundary - n * sizeof (UNIT));
+            U_SET (mem, 'X', n - 1);
+            mem[n - 1] = 0;
+            ASSERT (U_STRCHR (mem, 'U') == NULL);
+
+            {
+              size_t i;
+
+              for (i = 0; i < n; i++)
+                {
+                  mem[i] = 'U';
+                  ASSERT (U_STRCHR (mem, 'U') == mem + i);
+                  mem[i] = 'X';
+                }
+            }
+          }
+      }
+  }
+#endif
+
+  free (input);
+}