104 lines
2.6 KiB
C
Executable File
104 lines
2.6 KiB
C
Executable File
/* Compare two wide strings using the current locale.
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Copyright (C) 2011-2024 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2011.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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int
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wcscoll (const wchar_t *s1, const wchar_t *s2)
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{
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char mbbuf1[1024];
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char mbbuf2[1024];
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char *mbs1;
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char *mbs2;
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{
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int saved_errno = errno;
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/* Convert s1 to a multibyte string, trying to avoid malloc(). */
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{
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size_t ret;
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ret = wcstombs (mbbuf1, s1, sizeof (mbbuf1));
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if (ret == (size_t)-1)
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goto failed1;
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if (ret < sizeof (mbbuf1))
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mbs1 = mbbuf1;
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else
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{
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size_t need = wcstombs (NULL, s1, 0);
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if (need == (size_t)-1)
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goto failed1;
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mbs1 = (char *) malloc (need + 1);
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if (mbs1 == NULL)
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goto out_of_memory1;
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ret = wcstombs (mbs1, s1, need + 1);
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if (ret != need)
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abort ();
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}
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}
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/* Convert s2 to a multibyte string, trying to avoid malloc(). */
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{
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size_t ret;
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ret = wcstombs (mbbuf2, s2, sizeof (mbbuf2));
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if (ret == (size_t)-1)
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goto failed2;
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if (ret < sizeof (mbbuf2))
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mbs2 = mbbuf2;
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else
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{
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size_t need = wcstombs (NULL, s2, 0);
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if (need == (size_t)-1)
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goto failed2;
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mbs2 = (char *) malloc (need + 1);
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if (mbs2 == NULL)
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goto out_of_memory2;
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ret = wcstombs (mbs2, s2, need + 1);
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if (ret != need)
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abort ();
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}
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}
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/* No error so far. */
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errno = saved_errno;
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}
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/* Compare the two multibyte strings. */
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{
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int result = strcoll (mbs1, mbs2);
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if (mbs1 != mbbuf1)
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free (mbs1);
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if (mbs2 != mbbuf2)
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free (mbs2);
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return result;
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}
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out_of_memory2:
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if (mbs1 != mbbuf1)
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free (mbs1);
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out_of_memory1:
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errno = ENOMEM;
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return 0;
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failed2:
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if (mbs1 != mbbuf1)
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free (mbs1);
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failed1:
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errno = EILSEQ;
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return 0;
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}
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