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https://gitlab.freedesktop.org/libinput/libinput.git
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4fd5fe9d30
Array out of bounds complaints but it's a false positive where clang-tidy makes up some event flow that cannot happen. Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1358>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
#pragma once
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/* Copyright © 2005-2014 Rich Felker, et al.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include <ctype.h>
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#include <dirent.h>
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#include <string.h>
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#if !defined(HAVE_VERSIONSORT) || defined(TEST_VERSIONSORT)
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static inline int
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libinput_strverscmp(const char *l0, const char *r0)
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{
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const unsigned char *l = (const void *)l0;
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const unsigned char *r = (const void *)r0;
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size_t i, dp, j;
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int z = 1;
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/* Find maximal matching prefix and track its maximal digit
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* suffix and whether those digits are all zeros. */
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for (dp = i = 0; l[i] == r[i]; /* NOLINT(clang-analyzer-security.ArrayBound) */
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i++) {
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int c = l[i];
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if (!c)
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return 0;
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if (!isdigit(c))
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dp = i + 1, z = 1;
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else if (c != '0')
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z = 0;
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}
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if (l[dp] != '0' && r[dp] != '0') {
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/* If we're not looking at a digit sequence that began
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* with a zero, longest digit string is greater. */
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for (j = i; isdigit(l[j]); j++)
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if (!isdigit(r[j]))
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return 1;
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if (isdigit(r[j]))
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return -1;
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} else if (z && dp < i && (isdigit(l[i]) || isdigit(r[i]))) {
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/* Otherwise, if common prefix of digit sequence is
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* all zeros, digits order less than non-digits. */
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return (unsigned char)(l[i] - '0') - (unsigned char)(r[i] - '0');
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}
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return l[i] - r[i];
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}
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#endif
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/* Defined with libinput_ names for testing from platforms with native functions. */
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#ifndef HAVE_VERSIONSORT
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static inline int
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strverscmp(const char *l0, const char *r0)
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{
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return libinput_strverscmp(l0, r0);
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}
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static inline int
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versionsort(const struct dirent **a, const struct dirent **b)
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{
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return libinput_strverscmp((*a)->d_name, (*b)->d_name);
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}
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#endif
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