bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org> |
| 3 | * |
| 4 | * This file may be redistributed under the terms of the |
| 5 | * GNU Lesser General Public License. |
| 6 | * |
| 7 | * General memory allocation wrappers for malloc, realloc, calloc and strdup |
| 8 | */ |
| 9 | |
| 10 | #ifndef UTIL_LINUX_XALLOC_H |
| 11 | #define UTIL_LINUX_XALLOC_H |
| 12 | |
| 13 | #include <stdlib.h> |
| 14 | #include <string.h> |
| 15 | |
| 16 | #include "c.h" |
| 17 | |
| 18 | #ifndef XALLOC_EXIT_CODE |
| 19 | # define XALLOC_EXIT_CODE EXIT_FAILURE |
| 20 | #endif |
| 21 | |
| 22 | static inline __ul_alloc_size(1) |
| 23 | void *xmalloc(const size_t size) |
| 24 | { |
| 25 | void *ret = malloc(size); |
| 26 | |
| 27 | if (!ret && size) |
| 28 | err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size); |
| 29 | return ret; |
| 30 | } |
| 31 | |
| 32 | static inline __ul_alloc_size(2) |
| 33 | void *xrealloc(void *ptr, const size_t size) |
| 34 | { |
| 35 | void *ret = realloc(ptr, size); |
| 36 | |
| 37 | if (!ret && size) |
| 38 | err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size); |
| 39 | return ret; |
| 40 | } |
| 41 | |
| 42 | static inline __ul_calloc_size(1, 2) |
| 43 | void *xcalloc(const size_t nelems, const size_t size) |
| 44 | { |
| 45 | void *ret = calloc(nelems, size); |
| 46 | |
| 47 | if (!ret && size && nelems) |
| 48 | err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size); |
| 49 | return ret; |
| 50 | } |
| 51 | |
bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame^] | 52 | static inline char __attribute__((warn_unused_result)) *xstrdup(const char *str) |
bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 53 | { |
| 54 | char *ret; |
| 55 | |
| 56 | if (!str) |
| 57 | return NULL; |
| 58 | |
| 59 | ret = strdup(str); |
| 60 | |
| 61 | if (!ret) |
| 62 | err(XALLOC_EXIT_CODE, "cannot duplicate string"); |
| 63 | return ret; |
| 64 | } |
| 65 | |
bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame^] | 66 | static inline char * __attribute__((warn_unused_result)) xstrndup(const char *str, size_t size) |
| 67 | { |
| 68 | char *ret; |
| 69 | |
| 70 | if (!str) |
| 71 | return NULL; |
| 72 | |
| 73 | ret = strndup(str, size); |
| 74 | |
| 75 | if (!ret) |
| 76 | err(XALLOC_EXIT_CODE, "cannot duplicate string"); |
| 77 | return ret; |
| 78 | } |
| 79 | |
| 80 | |
bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 81 | static inline int __attribute__ ((__format__(printf, 2, 3))) |
| 82 | xasprintf(char **strp, const char *fmt, ...) |
| 83 | { |
| 84 | int ret; |
| 85 | va_list args; |
| 86 | va_start(args, fmt); |
| 87 | ret = vasprintf(&(*strp), fmt, args); |
| 88 | va_end(args); |
| 89 | if (ret < 0) |
| 90 | err(XALLOC_EXIT_CODE, "cannot allocate string"); |
| 91 | return ret; |
| 92 | } |
| 93 | |
bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame^] | 94 | static inline int xvasprintf(char **strp, const char *fmt, va_list ap) |
| 95 | { |
| 96 | int ret = vasprintf(&(*strp), fmt, ap); |
| 97 | if (ret < 0) |
| 98 | err(XALLOC_EXIT_CODE, "cannot allocate string"); |
| 99 | return ret; |
| 100 | } |
bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 101 | |
bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame^] | 102 | |
| 103 | static inline char * __attribute__((warn_unused_result)) xgethostname(void) |
bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 104 | { |
| 105 | char *name; |
| 106 | size_t sz = get_hostname_max() + 1; |
| 107 | |
| 108 | name = xmalloc(sizeof(char) * sz); |
bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 109 | |
bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame^] | 110 | if (gethostname(name, sz) != 0) { |
| 111 | free(name); |
| 112 | return NULL; |
| 113 | } |
bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 114 | name[sz - 1] = '\0'; |
| 115 | return name; |
| 116 | } |
| 117 | |
| 118 | #endif |