pcre2: Update to 10.43

thirdparty/pcre2/src/pcre2_chkdint.c

@@ -0,0 +1,96 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/* PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+                     Written by Philip Hazel
+            Copyright (c) 2023 University of Cambridge
+
+-----------------------------------------------------------------------------
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+    * Neither the name of the University of Cambridge nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+-----------------------------------------------------------------------------
+*/
+
+/* This file contains functions to implement checked integer operation */
+
+#ifndef PCRE2_PCRE2TEST
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "pcre2_internal.h"
+#endif
+
+/*************************************************
+*        Checked Integer Multiplication          *
+*************************************************/
+
+/*
+Arguments:
+  r         A pointer to PCRE2_SIZE to store the answer
+  a, b      Two integers
+
+Returns:    Bool indicating if the operation overflows
+
+It is modeled after C23's <stdckdint.h> interface
+The INT64_OR_DOUBLE type is a 64-bit integer type when available,
+otherwise double. */
+
+BOOL
+PRIV(ckd_smul)(PCRE2_SIZE *r, int a, int b)
+{
+#ifdef HAVE_BUILTIN_MUL_OVERFLOW
+PCRE2_SIZE m;
+
+if (__builtin_mul_overflow(a, b, &m)) return TRUE;
+
+*r = m;
+#else
+INT64_OR_DOUBLE m;
+
+#ifdef PCRE2_DEBUG
+if (a < 0 || b < 0) abort();
+#endif
+
+m = (INT64_OR_DOUBLE)a * (INT64_OR_DOUBLE)b;
+
+#if defined INT64_MAX || defined int64_t
+if (sizeof(m) > sizeof(*r) && m > (INT64_OR_DOUBLE)PCRE2_SIZE_MAX) return TRUE;
+*r = (PCRE2_SIZE)m;
+#else
+if (m > PCRE2_SIZE_MAX) return TRUE;
+*r = m;
+#endif
+
+#endif
+
+return FALSE;
+}
+
+/* End of pcre_chkdint.c */