mirror of
https://github.com/clearlinux/graphene.git
synced 2026-09-06 13:51:28 +00:00
Don Porter
203a3920fa
Fixing the bound of a debug buffer in SGX PAL Rewrite bytes2hexstr; Add two new macros, alloca_bytes2hexstr() and malloc_bytes2hexstr(). Remove HASHBUF_SIZE Add comments for the bytes2hexstr() macros. Add a compile-time assertion
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
/* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
|
|
/* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
|
|
|
|
/* Copyright (C) 2014 OSCAR lab, Stony Brook University
|
|
2017 University of North Carolina at Chapel Hill
|
|
This file is part of Graphene Library OS.
|
|
|
|
Graphene Library OS is free software: you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation, either version 3 of the
|
|
License, or (at your option) any later version.
|
|
|
|
Graphene Library OS is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef HEX_H
|
|
#define HEX_H
|
|
|
|
/* This function is a helper for debug printing.
|
|
* It accepts a pointer to a numerical value, and
|
|
* formats it as a hex string, for printing.
|
|
* size is the number of bytes pointed to by hex.
|
|
* str is the caller-provided buffer, len is the length of the buffer.
|
|
* The len must be at least (size * 2)+1.
|
|
*
|
|
* Note that it does not normalize for endianness, and pads to the
|
|
* size the compiler things the string is.
|
|
*/
|
|
#include <assert.h>
|
|
static inline __attribute__((always_inline))
|
|
char * __bytes2hexstr(void * hex, size_t size, char *str, size_t len)
|
|
{
|
|
static char * ch = "0123456789abcdef";
|
|
assert(len >= size * 2 + 1);
|
|
|
|
for (size_t i = 0 ; i < size ; i++) {
|
|
unsigned char h = ((unsigned char *) hex)[i];
|
|
str[i * 2] = ch[h / 16];
|
|
str[i * 2 + 1] = ch[h % 16];
|
|
}
|
|
|
|
str[size * 2] = 0;
|
|
return str;
|
|
}
|
|
|
|
#define IS_INDEXABLE(arg) (sizeof((arg)[0]))
|
|
#define IS_ARRAY(arg) (IS_INDEXABLE(arg) > 0 && (((void *) &(arg)) == ((void *) (arg))))
|
|
|
|
|
|
/*
|
|
* bytes2hexstr converts an array into a hexadecimal string and fills into a
|
|
* given buffer. The buffer size is given as an extra argument.
|
|
*/
|
|
#define bytes2hexstr(array, str, len) ({ \
|
|
COMPILE_TIME_ASSERT(IS_ARRAY(array)); \
|
|
__bytes2hexstr((array), sizeof(array), str, len);})
|
|
|
|
/*
|
|
* alloca_bytes2hexstr uses __alloca to allocate a buffer on the current frame
|
|
* and then fills the hexadecimal string into the buffer.
|
|
* This buffer can only be used within the caller frame (function).
|
|
*/
|
|
#define alloca_bytes2hexstr(array) \
|
|
(bytes2hexstr((array), __alloca(sizeof(array) * 2 + 1), sizeof(array) * 2 + 1))
|
|
|
|
#endif // HEX_H
|