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#include <stdio.h>
#include <string.h>
#include <sys/uio.h>
#include "compiler.h"
#include "string_utils.h"
#include "utils.h"
/// Report allocation failure without allocating memory
void report_allocation_failure(const char *func, const char *file, unsigned int line) {
// Since memory allocation failed, we try to print this error message without any
// memory allocation. Since logging framework allocates memory (and might even
// have not been initialized yet), so we can't use it.
char buf[11];
int llen = uitostr(line, buf);
const char msg1[] = " has failed to allocate memory, ";
const char msg2[] = ". Aborting...\n";
const struct iovec v[] = {
{.iov_base = (void *)func, .iov_len = strlen(func)},
{.iov_base = "()", .iov_len = 2},
{.iov_base = (void *)msg1, .iov_len = sizeof(msg1) - 1},
{.iov_base = "at ", .iov_len = 3},
{.iov_base = (void *)file, .iov_len = strlen(file)},
{.iov_base = ":", .iov_len = 1},
{.iov_base = buf, .iov_len = (size_t)llen},
{.iov_base = (void *)msg2, .iov_len = sizeof(msg2) - 1},
};
writev(STDERR_FILENO, v, ARR_SIZE(v));
abort();
unreachable;
}
///
/// Calculates next closest power of two of 32bit integer n
/// ref: https://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
///
int next_power_of_two(int n) {
n--;
n |= n >> 1;
n |= n >> 2;
n |= n >> 4;
n |= n >> 8;
n |= n >> 16;
n++;
return n;
}
// vim: set noet sw=8 ts=8 :
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