1 /* 2 * Copyright (C) 2020-2021 Jo-Philipp Wich <jo@mein.io> 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #ifndef UCODE_UTIL_H 18 #define UCODE_UTIL_H 19 20 #include <stdio.h> 21 #include <stddef.h> 22 #include <stdlib.h> 23 #include <stdbool.h> 24 #include <stdarg.h> /* va_start(), va_end(), va_list */ 25 #include <string.h> /* strdup() */ 26 #include <json-c/json.h> 27 28 29 #ifndef __hidden 30 #define __hidden __attribute__((visibility("hidden"))) 31 #endif 32 33 34 /* alignment & array size */ 35 36 #ifndef ALIGN 37 #define ALIGN(x) (((x) + sizeof(size_t) - 1) & -sizeof(size_t)) 38 #endif 39 40 #ifndef ARRAY_SIZE 41 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) 42 #endif 43 44 45 /* vector macros */ 46 47 #define UC_VECTOR_CHUNK_SIZE 8 48 49 #define uc_declare_vector(name, type) \ 50 typedef struct { \ 51 size_t count; \ 52 type *entries; \ 53 } name 54 55 #define uc_vector_grow(vec) \ 56 do { \ 57 if (((vec)->count % UC_VECTOR_CHUNK_SIZE) == 0) { \ 58 (vec)->entries = xrealloc((vec)->entries, sizeof((vec)->entries[0]) * ((vec)->count + UC_VECTOR_CHUNK_SIZE)); \ 59 memset(&(vec)->entries[(vec)->count], 0, sizeof((vec)->entries[0]) * UC_VECTOR_CHUNK_SIZE); \ 60 } \ 61 } while(0) 62 63 #define uc_vector_clear(vec) \ 64 do { \ 65 free((vec)->entries); \ 66 (vec)->entries = NULL; \ 67 (vec)->count = 0; \ 68 } while(0) 69 70 #define uc_vector_first(vec) \ 71 (&((vec)->entries[0])) 72 73 #define uc_vector_last(vec) \ 74 (&((vec)->entries[(vec)->count - 1])) 75 76 #define uc_vector_push(vec, val) do { \ 77 uc_vector_grow(vec); \ 78 (vec)->entries[(vec)->count++] = (val); \ 79 } while(0) 80 81 82 /* "failsafe" utility functions */ 83 84 static inline void *xcalloc(size_t size, size_t nmemb) { 85 void *ptr = calloc(size, nmemb); 86 87 if (!ptr) { 88 fprintf(stderr, "Out of memory\n"); 89 abort(); 90 } 91 92 return ptr; 93 } 94 95 static inline void *xalloc(size_t size) { 96 return xcalloc(1, size); 97 } 98 99 static inline void *xrealloc(void *ptr, size_t size) { 100 ptr = realloc(ptr, size); 101 102 if (!ptr) { 103 fprintf(stderr, "Out of memory\n"); 104 abort(); 105 } 106 107 return ptr; 108 } 109 110 static inline char *xstrdup(const char *s) { 111 char *ptr = strdup(s); 112 113 if (!ptr) { 114 fprintf(stderr, "Out of memory\n"); 115 abort(); 116 } 117 118 return ptr; 119 } 120 121 static inline struct json_tokener *xjs_new_tokener(void) { 122 struct json_tokener *tok = json_tokener_new(); 123 124 if (!tok) { 125 fprintf(stderr, "Out of memory\n"); 126 abort(); 127 } 128 129 return tok; 130 } 131 132 __attribute__((format(printf, 2, 0))) 133 static inline int xasprintf(char **strp, const char *fmt, ...) { 134 va_list ap; 135 int len; 136 137 va_start(ap, fmt); 138 len = vasprintf(strp, fmt, ap); 139 va_end(ap); 140 141 if (len == -1) { 142 fprintf(stderr, "Out of memory\n"); 143 abort(); 144 } 145 146 return len; 147 } 148 149 __attribute__((format(printf, 2, 0))) 150 static inline int xvasprintf(char **strp, const char *fmt, va_list ap) { 151 int len = vasprintf(strp, fmt, ap); 152 153 if (len == -1) { 154 fprintf(stderr, "Out of memory\n"); 155 abort(); 156 } 157 158 return len; 159 } 160 161 static inline struct printbuf *xprintbuf_new(void) { 162 struct printbuf *pb = printbuf_new(); 163 164 if (!pb) { 165 fprintf(stderr, "Out of memory\n"); 166 abort(); 167 } 168 169 return pb; 170 } 171 172 #endif /* UCODE_UTIL_H */ 173
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