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/*
* Copyright (c) 2004,2005 Michael Schroeder (mls@suse.de)
*
* This program is licensed under the BSD license, read LICENSE.BSD
* for further information
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "util.h"
/****************************************************************
*
* utility functions
*
*/
void *
xmalloc(size_t len)
{
void *r = malloc(len ? len : 1);
if (r)
return r;
fprintf(stderr, "Out of memory allocating %zu bytes!\n", len);
exit(1);
}
void *
xmalloc2(size_t num, size_t len)
{
if (len && (num * len) / len != num)
{
fprintf(stderr, "Out of memory allocating %zu*%zu bytes!\n", num, len);
exit(1);
}
return xmalloc(num * len);
}
void *
xrealloc(void *old, size_t len)
{
if (old == 0)
old = malloc(len ? len : 1);
else
old = realloc(old, len ? len : 1);
if (old)
return old;
fprintf(stderr, "Out of memory reallocating %zu bytes!\n", len);
exit(1);
}
void *
xrealloc2(void *old, size_t num, size_t len)
{
if (len && (num * len) / len != num)
{
fprintf(stderr, "Out of memory allocating %zu*%zu bytes!\n", num, len);
exit(1);
}
return xrealloc(old, num * len);
}
void *
xcalloc(size_t num, size_t len)
{
void *r = calloc(num, len);
if (r)
return r;
fprintf(stderr, "Out of memory allocating %zu*%zu bytes!\n", num, len);
exit(1);
}
void *
xfree(void *mem)
{
if (mem)
free(mem);
return 0;
}
ssize_t
xread(int fd, void *buf, size_t l)
{
size_t ol = l;
ssize_t r;
while (l)
{
r = read(fd, buf, l);
if (r < 0)
{
if (errno == EINTR)
continue;
return r;
}
if (r == 0)
return ol - l;
buf += r;
l -= r;
}
return ol;
}
int
parsehex(char *s, unsigned char *hex, int len)
{
int i, r = 0;
len *= 2;
for (i = 0; ; i++, s++)
{
if (*s == 0 && !(i & 1))
return i / 2;
if (i == len)
{
fprintf(stderr, "parsehex: string too long\n");
exit(1);
}
if (*s >= '0' && *s <= '9')
r = (r << 4) | (*s - '0');
else if (*s >= 'a' && *s <= 'f')
r = (r << 4) | (*s - ('a' - 10));
else if (*s >= 'A' && *s <= 'F')
r = (r << 4) | (*s - ('a' - 10));
else
{
fprintf(stderr, "parsehex: bad string\n");
exit(1);
}
if ((i & 1) != 0)
{
hex[i / 2] = r;
r = 0;
}
}
}
void
parsemd5(char *s, unsigned char *md5)
{
if (!*s)
{
memset(md5, 0, 16);
return;
}
if (parsehex(s, md5, 16) != 16)
{
fprintf(stderr, "parsemd5: bad md5\n");
exit(1);
}
}
void
parsesha256(char *s, unsigned char *sha256)
{
if (!*s)
{
memset(sha256, 0, 32);
return;
}
if (parsehex(s, sha256, 32) != 32)
{
fprintf(stderr, "parsesha256: bad sha256\n");
exit(1);
}
}
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