| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef _BABELTRACE_COMPAT_STRING_H |
| 8 | #define _BABELTRACE_COMPAT_STRING_H |
| 9 | |
| 10 | #include <string.h> |
| 11 | #include <stdlib.h> |
| 12 | |
| 13 | #ifdef HAVE_STRNLEN |
| 14 | static inline |
| 15 | size_t bt_strnlen(const char *str, size_t max) |
| 16 | { |
| 17 | return strnlen(str, max); |
| 18 | } |
| 19 | #else |
| 20 | static inline |
| 21 | size_t bt_strnlen(const char *str, size_t max) |
| 22 | { |
| 23 | size_t ret; |
| 24 | const char *end; |
| 25 | |
| 26 | end = memchr(str, 0, max); |
| 27 | |
| 28 | if (end) { |
| 29 | ret = (size_t) (end - str); |
| 30 | } else { |
| 31 | ret = max; |
| 32 | } |
| 33 | |
| 34 | return ret; |
| 35 | } |
| 36 | #endif /* HAVE_STRNLEN */ |
| 37 | |
| 38 | #ifdef HAVE_STRNDUP |
| 39 | static inline |
| 40 | char *bt_strndup(const char *s, size_t n) |
| 41 | { |
| 42 | return strndup(s, n); |
| 43 | } |
| 44 | #else |
| 45 | static inline |
| 46 | char *bt_strndup(const char *s, size_t n) |
| 47 | { |
| 48 | char *ret; |
| 49 | size_t navail; |
| 50 | |
| 51 | if (!s) { |
| 52 | ret = NULL; |
| 53 | goto end; |
| 54 | } |
| 55 | |
| 56 | /* min() */ |
| 57 | navail = strlen(s) + 1; |
| 58 | if ((n + 1) < navail) { |
| 59 | navail = n + 1; |
| 60 | } |
| 61 | |
| 62 | ret = malloc(navail); |
| 63 | if (!ret) { |
| 64 | goto end; |
| 65 | } |
| 66 | |
| 67 | memcpy(ret, s, navail); |
| 68 | ret[navail - 1] = '\0'; |
| 69 | end: |
| 70 | return ret; |
| 71 | } |
| 72 | #endif /* HAVE_STRNDUP */ |
| 73 | |
| 74 | #endif /* _BABELTRACE_COMPAT_STRING_H */ |