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/*
* Copyright (C) 2020-2021 Jo-Philipp Wich <jo@mein.io>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __UTIL_H_
#define __UTIL_H_
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdarg.h> /* va_start(), va_end(), va_list */
#include <string.h> /* strdup() */
#include <json-c/json.h>
/* alignment & array size */
#ifndef ALIGN
#define ALIGN(x) (((x) + sizeof(size_t) - 1) & -sizeof(size_t))
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#endif
/* vector macros */
#define UC_VECTOR_CHUNK_SIZE 8
#define uc_declare_vector(name, type) \
typedef struct { \
size_t count; \
type *entries; \
} name
#define uc_vector_grow(vec) \
do { \
if (((vec)->count % UC_VECTOR_CHUNK_SIZE) == 0) { \
(vec)->entries = xrealloc((vec)->entries, sizeof((vec)->entries[0]) * ((vec)->count + UC_VECTOR_CHUNK_SIZE)); \
memset(&(vec)->entries[(vec)->count], 0, sizeof((vec)->entries[0]) * UC_VECTOR_CHUNK_SIZE); \
} \
} while(0)
#define uc_vector_clear(vec) \
do { \
free((vec)->entries); \
(vec)->entries = NULL; \
(vec)->count = 0; \
} while(0)
#define uc_vector_first(vec) \
(&((vec)->entries[0]))
#define uc_vector_last(vec) \
(&((vec)->entries[(vec)->count - 1]))
/* "failsafe" utility functions */
static inline void *xalloc(size_t size) {
void *ptr = calloc(1, size);
if (!ptr) {
fprintf(stderr, "Out of memory\n");
abort();
}
return ptr;
}
static inline void *xrealloc(void *ptr, size_t size) {
ptr = realloc(ptr, size);
if (!ptr) {
fprintf(stderr, "Out of memory\n");
abort();
}
return ptr;
}
static inline char *xstrdup(const char *s) {
char *ptr = strdup(s);
if (!ptr) {
fprintf(stderr, "Out of memory\n");
abort();
}
return ptr;
}
static inline struct json_tokener *xjs_new_tokener(void) {
struct json_tokener *tok = json_tokener_new();
if (!tok) {
fprintf(stderr, "Out of memory\n");
abort();
}
return tok;
}
__attribute__((format(printf, 2, 0)))
static inline int xasprintf(char **strp, const char *fmt, ...) {
va_list ap;
int len;
va_start(ap, fmt);
len = vasprintf(strp, fmt, ap);
va_end(ap);
if (len == -1) {
fprintf(stderr, "Out of memory\n");
abort();
}
return len;
}
__attribute__((format(printf, 2, 0)))
static inline int xvasprintf(char **strp, const char *fmt, va_list ap) {
int len = vasprintf(strp, fmt, ap);
if (len == -1) {
fprintf(stderr, "Out of memory\n");
abort();
}
return len;
}
static inline struct printbuf *xprintbuf_new(void) {
struct printbuf *pb = printbuf_new();
if (!pb) {
fprintf(stderr, "Out of memory\n");
abort();
}
return pb;
}
#endif /* __UTIL_H_ */
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