| 1 | //===-- Implementation of strstr ------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/string/strstr.h" |
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| 10 | |
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| 11 | #include "src/__support/common.h" |
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| 12 | #include "src/__support/macros/config.h" |
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| 13 | #include "src/__support/macros/null_check.h" |
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| 14 | #include "src/string/memory_utils/inline_strstr.h" |
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| 15 | |
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| 16 | namespace LIBC_NAMESPACE_DECL { |
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| 17 | |
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| 18 | // TODO: This is a simple brute force implementation. This can be |
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| 19 | // improved upon using well known string matching algorithms. |
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| 20 | LLVM_LIBC_FUNCTION(char *, strstr, (const char *haystack, const char *needle)) { |
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| 21 | auto comp = [](char l, char r) -> int { return l - r; }; |
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| 22 | LIBC_CRASH_ON_NULLPTR(haystack); |
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| 23 | LIBC_CRASH_ON_NULLPTR(needle); |
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| 24 | return inline_strstr(haystack, needle, comp); |
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| 25 | } |
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| 26 | |
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| 27 | } // namespace LIBC_NAMESPACE_DECL |
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| 28 | |
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