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+/* ialloc.h -- malloc with idx_t rather than size_t
+
+ Copyright 2021-2022 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifndef IALLOC_H_
+#define IALLOC_H_
+
+#include "idx.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef IALLOC_INLINE
+# define IALLOC_INLINE _GL_INLINE
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+IALLOC_INLINE void * _GL_ATTRIBUTE_COLD
+_gl_alloc_nomem (void)
+{
+ errno = ENOMEM;
+ return NULL;
+}
+
+IALLOC_INLINE
+_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/
+void *
+imalloc (idx_t s)
+{
+ return s <= SIZE_MAX ? malloc (s) : _gl_alloc_nomem ();
+}
+
+IALLOC_INLINE
+/*_GL_ATTRIBUTE_DEALLOC_FREE*/
+void *
+irealloc (void *p, idx_t s)
+{
+ /* Work around GNU realloc glitch by treating a zero size as if it
+ were 1, so that returning NULL is equivalent to failing. */
+ return s <= SIZE_MAX ? realloc (p, s | !s) : _gl_alloc_nomem ();
+}
+
+IALLOC_INLINE
+_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/
+void *
+icalloc (idx_t n, idx_t s)
+{
+ if (SIZE_MAX < n)
+ {
+ if (s != 0)
+ return _gl_alloc_nomem ();
+ n = 0;
+ }
+ if (SIZE_MAX < s)
+ {
+ if (n != 0)
+ return _gl_alloc_nomem ();
+ s = 0;
+ }
+ return calloc (n, s);
+}
+
+IALLOC_INLINE void *
+ireallocarray (void *p, idx_t n, idx_t s)
+{
+ /* Work around GNU reallocarray glitch by treating a zero size as if
+ it were 1, so that returning NULL is equivalent to failing. */
+ if (n == 0 || s == 0)
+ n = s = 1;
+ return (n <= SIZE_MAX && s <= SIZE_MAX
+ ? reallocarray (p, n, s)
+ : _gl_alloc_nomem ());
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif