libplatform-161.tar.gz

[apple/libplatform.git] / private / platform / compat.h

diff --git a/private/platform/compat.h b/private/platform/compat.h
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+++ b/private/platform/compat.h
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+/*
+ * Copyright (c) 2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef _PLATFORM_COMPAT_H_
+#define _PLATFORM_COMPAT_H_
+
+#include <platform/string.h>
+
+__BEGIN_DECLS
+
+/* Helpers for other common non-primitive routines */
+
+__header_always_inline
+size_t
+_platform_strlen(const char *s) {
+       const char *t = _platform_memchr(s, '\0', SIZE_MAX);
+       return (uintptr_t)t - (uintptr_t)s;
+}
+
+__header_always_inline
+size_t
+_platform_strlcpy(char * restrict dst, const char * restrict src, size_t maxlen) {
+       const size_t srclen = _platform_strlen(src);
+       if (srclen < maxlen) {
+               _platform_memmove(dst, src, srclen+1);
+       } else if (maxlen != 0) {
+               _platform_memmove(dst, src, maxlen-1);
+               dst[maxlen-1] = '\0';
+       }
+       return srclen;
+}
+
+__END_DECLS
+
+/* Compat macros for primitives */
+#define bzero            _platform_bzero
+#define memchr           _platform_memchr
+#define memcmp           _platform_memcmp
+#define memmove          _platform_memmove
+#define memccpy          _platform_memccpy
+#define memset           _platform_memset
+#define memset_pattern4  _platform_memset_pattern4
+#define memset_pattern8  _platform_memset_pattern8
+#define memset_pattern16 _platform_memset_pattern16
+#define strchr           _platform_strchr
+#define strcmp           _platform_strcmp
+#define strncmp          _platform_strncmp
+
+/* Compat macros for non-primitive helpers */
+#define strlcpy          _platform_strlcpy
+#define strlen           _platform_strlen
+
+#endif /* _PLATFORM_COMPAT_H_ */