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Diffstat (limited to 'newlib/libc/iconv/lib/iconv.c')
| -rw-r--r-- | newlib/libc/iconv/lib/iconv.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/newlib/libc/iconv/lib/iconv.c b/newlib/libc/iconv/lib/iconv.c new file mode 100644 index 000000000..016e27323 --- /dev/null +++ b/newlib/libc/iconv/lib/iconv.c @@ -0,0 +1,257 @@ +/*- + * Copyright (c) 1999,2000 + * Konstantin Chuguev. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * iconv (Charset Conversion Library) v2.0 + */ + +/* +FUNCTION +<<iconv>>, <<iconv_open>>, <<iconv_close>>---charset conversion routines + +INDEX + iconv +INDEX + iconv_open +INDEX + iconv_close +INDEX + _iconv_r +INDEX + _iconv_open_r +INDEX + _iconv_close_r + +ANSI_SYNOPSIS + #include <iconv.h> + iconv_t iconv_open (const char *<[to]>, const char *<[from]>); + int iconv_close (iconv_t <[cd]>); + size_t iconv (iconv_t <[cd]>, const char **<[inbuf]>, + size_t *<[inbytesleft]>, + char **<[outbuf]>, size_t *<[outbytesleft]>), + + iconv_t _iconv_open_r (struct _reent *<[rptr]>, + const char *<[to]>, const char *<[from]>); + int _iconv_close_r (struct _reent *<[rptr]>, iconv_t <[cd]>); + size_t _iconv_r (struct _reent *<[rptr]>, + iconv_t <[cd]>, const char **<[inbuf]>, + size_t *<[inbytesleft]>, + char **<[outbuf]>, size_t *<[outbytesleft]>), + +TRAD_SYNOPSIS + #include <iconv.h> + size_t iconv (<[cd]>, <[in]>, <[inleft]>, <[out]>, <[outleft]>) + iconv_t <[cd]>; + const char **<[in]>; + size_t *<[inleft]>; + char **<[out]>; + size_t *<[outleft]>); + + #include <iconv.h> + iconv_t iconv_open (<[to]>, <[from]>); + const char *<[to]>; + const char *<[from]>; + + #include <iconv.h> + int iconv_close (<[cd]>); + iconv_t <[cd]>; + + #include <iconv.h> + size_t _iconv_r (<[rptr]>, <[cd]>, <[in]>, <[inleft]>, <[out]>, <[outleft]>) + struct _reent *<[rptr]>; + iconv_t <[cd]>; + const char **<[in]>; + size_t *<[inleft]>; + char **<[out]>; + size_t *<[outleft]>); + + #include <iconv.h> + iconv_t _iconv_open_r (<[rptr]>, <[to]>, <[from]>); + struct _reent *<[rptr]>; + const char *<[to]>; + const char *<[from]>; + + #include <iconv.h> + int iconv_close (<[rptr]>, <[cd]>); + struct _reent *<[rptr]>; + iconv_t <[cd]>; + +DESCRIPTION +The function <<iconv>> converts characters from <[in]> which are in one +character set and converts them to characters of another character set, +outputting them to <[out]>. The value <[inleft]> specifies the number +of input bytes to convert whereas the value <[outleft]> specifies the +size remaining in the <[out]> buffer. The conversion descriptor <[cd]> +specifies the conversion being performed and is created via <<iconv_open>>. + +An <<iconv>> conversion stops if: the input bytes are exhausted, the output +buffer is full, an invalid input character sequence occurs, or the +conversion specifier is invalid. + +The function <<iconv_open>> is used to specify a conversion from one +character set: <[from]> to another: <[to]>. The result of the call is +to create a conversion specifier that can be used with <<iconv>>. + +The function <<iconv_close>> is used to close a conversion specifier after +it is no longer needed. + +The <<_iconv_r>>, <<_iconv_open_r>>, and <<_iconv_close_r>> functions are +reentrant versions of <<iconv>>, <<iconv_open>>, and <<iconv_close>>, +respectively. An additional reentrancy struct pointer: <[rptr]> is passed +to properly set <<errno>>. + +RETURNS +The <<iconv>> function returns the number of non-identical conversions +performed. If an error occurs, (size_t)-1 is returned and <<errno>> +is set appropriately. The values of <[inleft]>, <[in]>, <[out]>, +and <[outleft]> are modified to indicate how much input was processed +and how much output was created. + +The <<iconv_open>> function returns either a valid conversion specifier +or (iconv_t)-1 to indicate failure. If failure occurs, <<errno>> is set +appropriately. + +The <<iconv_close>> function returns 0 on success or -1 on failure. +If failure occurs <<errno>> is set appropriately. + +PORTABILITY +<<iconv>>, <<iconv_open>>, and <<iconv_close>> are non-ANSI and are specified +by the Single Unix specification. + +No supporting OS subroutine calls are required. +*/ + +#ifdef ENABLE_ICONV + +#include <_ansi.h> +#include <reent.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <iconv.h> +#include "local.h" + +iconv_t +_DEFUN(iconv_open, (to, from), + _CONST char *to _AND + _CONST char *from) +{ + return _iconv_open_r(_REENT, to, from); +} + +size_t +_DEFUN(iconv, (cd, inbuf, inbytesleft, outbuf, outbytesleft), + iconv_t cd _AND + _CONST char **inbuf _AND + size_t *inbytesleft _AND + char **outbuf _AND + size_t *outbytesleft) +{ + return _iconv_r(_REENT, cd, inbuf, inbytesleft, outbuf, outbytesleft); +} + +int +_DEFUN(iconv_close, (cd), iconv_t cd) +{ + return _iconv_close_r(_REENT, cd); +} + +#ifndef _REENT_ONLY +iconv_t +_DEFUN(_iconv_open_r, (rptr, to, from), + struct _reent *rptr _AND + _CONST char *to _AND + _CONST char *from) +{ + iconv_converter *ic; + _CONST char *nlspath; + + if(!to || !from) + return (iconv_t)(-1); + + if ((nlspath = _getenv_r(rptr, NLS_ENVVAR_NAME)) == NULL || + *nlspath == '\0') + nlspath = NLS_DEFAULT_NLSPATH; + + if ((to = _iconv_resolve_cs_name(rptr, (_CONST char *)to, + (_CONST char *)nlspath)) == NULL) + return (iconv_t)(-1); + if ((from = _iconv_resolve_cs_name(rptr, (_CONST char *)from, + (_CONST char *)nlspath)) == NULL) + { + _free_r(rptr, (_VOID_PTR)to); + return (iconv_t)(-1); + } + + ic = strcmp(from, to) ? iconv_unicode_conv_init(rptr, to, from) + : iconv_null_conv_init(rptr, to, from); + _free_r(rptr, (_VOID_PTR)to); + _free_r(rptr, (_VOID_PTR)from); + return ic ? (iconv_t)(ic) : (iconv_t)(-1); +} + +size_t +_DEFUN(_iconv_r, (rptr, cd, inbuf, inbytesleft, outbuf, outbytesleft), + struct _reent *rptr _AND + iconv_t cd _AND + _CONST char **inbuf _AND + size_t *inbytesleft _AND + char **outbuf _AND + size_t *outbytesleft) +{ + if ((_VOID_PTR)cd == NULL) { + __errno_r(rptr) = EBADF; + return (size_t)(-1); + } + if (outbytesleft == NULL || + outbuf == NULL || *outbuf == 0) { + __errno_r(rptr) = E2BIG; + return (size_t)(-1); + } + return ((iconv_converter *)cd)->convert(rptr, (iconv_converter *)cd + 1, + (_CONST unsigned char**)inbuf, + inbytesleft, + (unsigned char**)outbuf, + outbytesleft); +} + +int +_DEFUN(_iconv_close_r, (rptr, cd), + struct _reent *rptr _AND + iconv_t cd) +{ + int res; + + if ((_VOID_PTR)cd == NULL || cd == (iconv_t)-1) { + __errno_r(rptr) = EBADF; + return -1; + } + res = ((iconv_converter *)cd)->close(rptr, (iconv_converter *)cd + 1); + _free_r(rptr, (_VOID_PTR)cd); + return res ? -1 : 0; +} +#endif /* #ifndef _REENT_ONLY */ + +#endif /* #ifdef ENABLE_ICONV */ + |