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/*
* FRR switchable defaults.
* Copyright (c) 2017-2019 David Lamparter, for NetDEF, Inc.
*
* Permission to use, copy, modify, and 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.
*/
#include <zebra.h>
#include "defaults.h"
#include "libfrr.h"
#include "version.h"
static int version_value(int ch)
{
/* non-ASCII shouldn't happen */
if (ch < 0 || ch >= 128)
return 2;
/* ~foo sorts older than nothing */
if (ch == '~')
return 0;
if (ch == '\0')
return 1;
if (isalpha(ch))
return 0x100 + tolower(ch);
/* punctuation and digits (and everything else) */
return 0x200 + ch;
}
int frr_version_cmp(const char *aa, const char *bb)
{
const char *apos = aa, *bpos = bb;
/* || is correct, we won't scan past the end of a string since that
* doesn't compare equal to anything else */
while (apos[0] || bpos[0]) {
if (isdigit((unsigned char)apos[0]) &&
isdigit((unsigned char)bpos[0])) {
unsigned long av, bv;
char *aend = NULL, *bend = NULL;
av = strtoul(apos, &aend, 10);
bv = strtoul(bpos, &bend, 10);
if (av < bv)
return -1;
if (av > bv)
return 1;
apos = aend;
bpos = bend;
continue;
}
int a = version_value(*apos++);
int b = version_value(*bpos++);
if (a < b)
return -1;
if (a > b)
return 1;
}
return 0;
}
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