| Imre Kis | b2e06a0 | 2024-05-28 16:50:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2024, Arm Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <stddef.h> |
| 8 | #include <string.h> |
| 9 | |
| 10 | char *strstr(const char *haystack, const char *needle) |
| 11 | { |
| 12 | const char *h = NULL; |
| 13 | size_t needle_len = 0; |
| 14 | |
| 15 | if (needle[0] == '\0') |
| 16 | return (char *)haystack; |
| 17 | |
| 18 | needle_len = strlen(needle); |
| 19 | for (h = haystack; (h = strchr(h, needle[0])) != 0; h++) |
| 20 | if (strncmp(h, needle, needle_len) == 0) |
| 21 | return (char *)h; |
| 22 | |
| 23 | return NULL; |
| 24 | } |