blob: a1272422f294de48d529fab855a1677e5b4a188f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
//===-- Implementation of strcasestr --------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/string/strcasestr.h"
#include "src/__support/common.h"
#include "src/__support/ctype_utils.h"
#include "src/string/memory_utils/strstr_implementations.h"
namespace __llvm_libc {
// TODO: This is a simple brute force implementation. This can be
// improved upon using well known string matching algorithms.
LLVM_LIBC_FUNCTION(char *, strcasestr,
(const char *haystack, const char *needle)) {
auto case_cmp = [](char a, char b) {
return __llvm_libc::internal::tolower(a) -
__llvm_libc::internal::tolower(b);
};
return strstr_implementation(haystack, needle, case_cmp);
}
} // namespace __llvm_libc
|
