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44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2025 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SOURCEKITLSP_CCOMPLETIONSCORING_H
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#define SOURCEKITLSP_CCOMPLETIONSCORING_H
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#define _GNU_SOURCE
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#include <string.h>
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static inline void *sourcekitlsp_memmem(const void *haystack, size_t haystack_len, const void *needle, size_t needle_len) {
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#if defined(_WIN32) && !defined(__CYGWIN__)
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// memmem is not available on Windows
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if (!haystack || haystack_len == 0) {
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return NULL;
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}
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if (!needle || needle_len == 0) {
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return NULL;
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}
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if (needle_len > haystack_len) {
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return NULL;
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}
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for (size_t offset = 0; offset <= haystack_len - needle_len; ++offset) {
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if (memcmp(haystack + offset, needle, needle_len) == 0) {
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return (void *)haystack + offset;
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}
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}
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return NULL;
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#else
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return memmem(haystack, haystack_len, needle, needle_len);
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#endif
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}
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#endif // SOURCEKITLSP_CCOMPLETIONSCORING_H
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