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79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*-
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* Copyright (c) 2006 Hajimu UMEMOTO <ume@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <dlfcn.h>
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#include <stddef.h>
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#include "iconv.h"
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#undef iconv_open
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#undef iconv
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#undef iconv_close
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#define ICONVLIB "libiconv.so"
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#define ICONV_ENGINE "libiconv"
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#define ICONV_OPEN "libiconv_open"
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#define ICONV_CLOSE "libiconv_close"
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typedef iconv_t iconv_open_t(const char *, const char *);
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dl_iconv_t *dl_iconv;
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dl_iconv_close_t *dl_iconv_close;
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static int initialized;
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static void *iconvlib;
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static iconv_open_t *iconv_open;
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iconv_t
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dl_iconv_open(const char *tocode, const char *fromcode)
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{
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if (initialized) {
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if (iconvlib == NULL)
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return (iconv_t)-1;
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} else {
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initialized = 1;
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iconvlib = dlopen(ICONVLIB, RTLD_LAZY | RTLD_GLOBAL);
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if (iconvlib == NULL)
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return (iconv_t)-1;
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iconv_open = (iconv_open_t *)dlfunc(iconvlib, ICONV_OPEN);
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if (iconv_open == NULL)
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goto dlfunc_err;
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dl_iconv = (dl_iconv_t *)dlfunc(iconvlib, ICONV_ENGINE);
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if (dl_iconv == NULL)
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goto dlfunc_err;
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dl_iconv_close = (dl_iconv_close_t *)dlfunc(iconvlib,
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ICONV_CLOSE);
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if (dl_iconv_close == NULL)
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goto dlfunc_err;
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}
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return iconv_open(tocode, fromcode);
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dlfunc_err:
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dlclose(iconvlib);
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iconvlib = NULL;
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return (iconv_t)-1;
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}
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