forked from Mirror/frr
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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/*
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* FRR switchable defaults.
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* Copyright (c) 2017-2019 David Lamparter, for NetDEF, Inc.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <zebra.h>
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#include "defaults.h"
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#include "libfrr.h"
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#include "version.h"
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static int version_value(int ch)
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{
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/* non-ASCII shouldn't happen */
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if (ch < 0 || ch >= 128)
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return 2;
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/* ~foo sorts older than nothing */
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if (ch == '~')
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return 0;
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if (ch == '\0')
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return 1;
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if (isalpha(ch))
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return 0x100 + tolower(ch);
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/* punctuation and digits (and everything else) */
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return 0x200 + ch;
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}
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int frr_version_cmp(const char *aa, const char *bb)
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{
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const char *apos = aa, *bpos = bb;
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/* || is correct, we won't scan past the end of a string since that
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* doesn't compare equal to anything else */
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while (apos[0] || bpos[0]) {
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if (isdigit((unsigned char)apos[0]) &&
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isdigit((unsigned char)bpos[0])) {
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unsigned long av, bv;
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char *aend = NULL, *bend = NULL;
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av = strtoul(apos, &aend, 10);
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bv = strtoul(bpos, &bend, 10);
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if (av < bv)
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return -1;
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if (av > bv)
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return 1;
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apos = aend;
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bpos = bend;
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continue;
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}
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int a = version_value(*apos++);
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int b = version_value(*bpos++);
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if (a < b)
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return -1;
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if (a > b)
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return 1;
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}
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return 0;
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}
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