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| Source at commit fe6d3a9e8504da158b00ed44ceeae54f6b96dfc4 created 7 years 4 months ago. By Werner Almesberger, eeshow/misc/util.h (strbegins): !strncmp(s, prefix, strlen(prefix)) | |
|---|---|
| 1 | /* |
| 2 | * misc/util.h - Common utility functions |
| 3 | * |
| 4 | * Written 2016 by Werner Almesberger |
| 5 | * Copyright 2016 Werner Almesberger |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | #ifndef MISC_UTIL_H |
| 15 | #define MISC_UTIL_H |
| 16 | |
| 17 | #include <stdbool.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <stdio.h> |
| 20 | #include <string.h> |
| 21 | |
| 22 | |
| 23 | #define alloc_size(s) \ |
| 24 | ({ void *alloc_size_tmp = malloc(s); \ |
| 25 | if (!alloc_size_tmp) { \ |
| 26 | perror("malloc"); \ |
| 27 | exit(1); \ |
| 28 | } \ |
| 29 | alloc_size_tmp; }) |
| 30 | |
| 31 | #define alloc_type(t) ((t *) alloc_size(sizeof(t))) |
| 32 | #define alloc_type_n(t, n) ((t *) alloc_size(sizeof(t) * (n))) |
| 33 | |
| 34 | |
| 35 | #define realloc_size(p, s) \ |
| 36 | ({ void *alloc_size_tmp = realloc((p), (s)); \ |
| 37 | if (!alloc_size_tmp) { \ |
| 38 | perror("realloc"); \ |
| 39 | exit(1); \ |
| 40 | } \ |
| 41 | alloc_size_tmp; }) |
| 42 | |
| 43 | #define realloc_type_n(p, t, n) ((t *) realloc_size((p), sizeof(t) * (n))) |
| 44 | |
| 45 | |
| 46 | #define stralloc(s) \ |
| 47 | ({ char *stralloc_tmp = strdup(s); \ |
| 48 | if (!stralloc_tmp) { \ |
| 49 | perror("strdup"); \ |
| 50 | exit(1); \ |
| 51 | } \ |
| 52 | stralloc_tmp; }) |
| 53 | |
| 54 | |
| 55 | #define ARRAY_ELEMENTS(a) (sizeof(a) / sizeof(a[0])) |
| 56 | #define ARRAY_END(a) ((a) + ARRAY_ELEMENTS(a)) |
| 57 | |
| 58 | |
| 59 | #define swap(a, b) \ |
| 60 | ({ typeof(a) _tmp = (a); a = (b); b = _tmp; }) |
| 61 | |
| 62 | #define sign1(x) ((x) < 0 ? -1 : 1) |
| 63 | |
| 64 | #define unsupported(s) \ |
| 65 | fprintf(stderr, __FILE__ ":%d: unsupported: " s "\n", __LINE__) |
| 66 | |
| 67 | |
| 68 | static inline bool strbegins(const char *s, const char *prefix) |
| 69 | { |
| 70 | return !strncmp(s, prefix, strlen(prefix)); |
| 71 | } |
| 72 | |
| 73 | #endif /* !MISC_UTIL_H */ |
| 74 | |
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