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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2009-2010 Carl-Daniel Hailfinger
* Copyright (C) 2013 Stefan Tauner
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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.
*/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "flash.h"
/* Returns the minimum number of bits needed to represent the given address.
* FIXME: use mind-blowing implementation. */
uint32_t address_to_bits(uint32_t addr)
{
unsigned int lzb = 0;
while (((1u << (31 - lzb)) & ~addr) != 0)
lzb++;
return 32 - lzb;
}
unsigned int bitcount(unsigned long a)
{
unsigned int i = 0;
for (; a != 0; a >>= 1)
if (a & 1)
i++;
return i;
}
int max(int a, int b)
{
return (a > b) ? a : b;
}
int min(int a, int b)
{
return (a < b) ? a : b;
}
char *strcat_realloc(char *dest, const char *src)
{
dest = realloc(dest, strlen(dest) + strlen(src) + 1);
if (!dest) {
msg_gerr("Out of memory!\n");
return NULL;
}
strcat(dest, src);
return dest;
}
void tolower_string(char *str)
{
for (; *str != '\0'; str++)
*str = (char)tolower((unsigned char)*str);
}
uint8_t reverse_byte(uint8_t x)
{
x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
return x;
}
void reverse_bytes(uint8_t *dst, const uint8_t *src, size_t length)
{
size_t i;
for (i = 0; i < length; i++)
dst[i] = reverse_byte(src[i]);
}
/* FIXME: Find a better solution for MinGW. Maybe wrap strtok_s (C11) if it becomes available */
#ifdef __MINGW32__
char* strtok_r(char *str, const char *delim, char **nextp)
{
if (str == NULL)
str = *nextp;
str += strspn(str, delim); /* Skip leading delimiters */
if (*str == '\0')
return NULL;
char *ret = str;
str += strcspn(str, delim); /* Find end of token */
if (*str != '\0')
*str++ = '\0';
*nextp = str;
return ret;
}
/* strndup is a POSIX function not present in MinGW */
char *strndup(const char *src, size_t maxlen)
{
char *retbuf;
size_t len;
for (len = 0; len < maxlen; len++)
if (src[len] == '\0')
break;
if ((retbuf = malloc(1 + len)) != NULL) {
memcpy(retbuf, src, len);
retbuf[len] = '\0';
}
return retbuf;
}
#endif
/* There is no strnlen in DJGPP */
#if defined(__DJGPP__) || (!defined(__LIBPAYLOAD__) && !defined(HAVE_STRNLEN))
size_t strnlen(const char *str, size_t n)
{
size_t i;
for (i = 0; i < n && str[i] != '\0'; i++)
;
return i;
}
#endif
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