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发表于 2018-5-22 12:58:28
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这个答案是否满意
- /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #include <string.h>
- #undef strcmp
- #ifndef STRCMP
- # define STRCMP strcmp
- #endif
- /* Compare S1 and S2, returning less than, equal to or
- greater than zero if S1 is lexicographically less than,
- equal to or greater than S2. */
- int
- STRCMP (const char *p1, const char *p2)
- {
- const unsigned char *s1 = (const unsigned char *) p1;
- const unsigned char *s2 = (const unsigned char *) p2;
- unsigned char c1, c2;
- do
- {
- c1 = (unsigned char) *s1++;
- c2 = (unsigned char) *s2++;
- if (c1 == '\0')
- return c1 - c2;
- }
- while (c1 == c2);
- return c1 - c2;
- }
- libc_hidden_builtin_def (strcmp)
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