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# /home/jklowden/releases/freetds-0.91/include/tdsiconv.h

    00001 /* FreeTDS - Library of routines accessing Sybase and Microsoft databases
    00002  * Copyright (C) 2002, 2003, 2004  Brian Bruns
    00003  *
    00004  * This library is free software; you can redistribute it and/or
    00005  * modify it under the terms of the GNU Library General Public
    00006  * License as published by the Free Software Foundation; either
    00007  * version 2 of the License, or (at your option) any later version.
    00008  *
    00009  * This library is distributed in the hope that it will be useful,
    00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012  * Library General Public License for more details.
    00013  *
    00014  * You should have received a copy of the GNU Library General Public
    00015  * License along with this library; if not, write to the
    00016  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017  * Boston, MA 02111-1307, USA.
    00018  */
    00019
    00020 #ifndef _tds_iconv_h_
    00021 #define _tds_iconv_h_
    00022
    00023 /* $Id: tdsiconv.h,v 1.40 2010/07/25 08:40:19 freddy77 Exp $ */
    00024
    00025 #if HAVE_ICONV
    00026 #include <iconv.h>
    00027 #else
    00028 /* Define iconv_t for src/replacements/iconv.c. */
    00029 #undef iconv_t
    00030 typedef void *iconv_t;
    00031 #endif /* HAVE_ICONV */
    00032
    00033 #if HAVE_ERRNO_H
    00034 #include <errno.h>
    00035 #endif
    00036
    00037 #if HAVE_WCHAR_H
    00038 #include <wchar.h>
    00039 #endif
    00040
    00041 /* The following EILSEQ advice is borrowed verbatim from GNU iconv.  */
    00042 /* Some systems, like SunOS 4, don't have EILSEQ. Some systems, like BSD/OS,
    00043    have EILSEQ in a different header.  On these systems, define EILSEQ
    00044    ourselves. */
    00045 #ifndef EILSEQ
    00046 # define EILSEQ ENOENT
    00047 #endif
    00048
    00049 #if HAVE_STDLIB_H
    00050 #include <stdlib.h>
    00051 #endif /* HAVE_STDLIB_H */
    00052
    00053 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(__MINGW32__)
    00054 #pragma GCC visibility push(hidden)
    00055 #endif
    00056
    00057 #ifdef __cplusplus
    00058 extern "C"
    00059 {
    00060 #endif
    00061
    00062 #if ! HAVE_ICONV
    00063 iconv_t tds_sys_iconv_open(const char *tocode, const char *fromcode);
    00064 size_t tds_sys_iconv(iconv_t cd, const char **inbuf, size_t * inbytesleft, char **outbuf, size_t * outbytesleft);
    00065 int tds_sys_iconv_close(iconv_t cd);
    00066 #else
    00067 #define tds_sys_iconv_open iconv_open
    00068 #define tds_sys_iconv iconv
    00069 #define tds_sys_iconv_close iconv_close
    00070 #endif /* !HAVE_ICONV */
    00071
    00072
    00073 typedef enum
    00074 { to_server, to_client } TDS_ICONV_DIRECTION;
    00075
    00076 typedef struct _character_set_alias
    00077 {
    00078         const char *alias;
    00079         int canonic;
    00080 } CHARACTER_SET_ALIAS;
    00081
    00082 typedef struct tds_errno_message_flags {
    00083         unsigned int e2big:1;
    00084         unsigned int eilseq:1;
    00085         unsigned int einval:1;
    00086 } TDS_ERRNO_MESSAGE_FLAGS;
    00087
    00088 struct tdsiconvinfo
    00089 {
    00090         TDS_ENCODING client_charset;
    00091         TDS_ENCODING server_charset;
    00092
    00093 #define TDS_ENCODING_INDIRECT 1
    00094 #define TDS_ENCODING_SWAPBYTE 2
    00095 #define TDS_ENCODING_MEMCPY   4
    00096         unsigned int flags;
    00097
    00098         iconv_t to_wire;        /* conversion from client charset to server's format */
    00099         iconv_t from_wire;      /* conversion from server's format to client charset */
    00100
    00101         iconv_t to_wire2;       /* conversion from client charset to server's format - indirect */
    00102         iconv_t from_wire2;     /* conversion from server's format to client charset - indirect */
    00103
    00104         /*
    00105          * Suppress error messages that would otherwise be emitted by tds_iconv().
    00106          * Functions that process large buffers ask tds_iconv to convert it in "chunks".
    00107          * We don't want to emit spurious EILSEQ errors or multiple errors for one
    00108          * buffer.  tds_iconv() checks this structure before emiting a message, and
    00109          * adds to it whenever it emits one.  Callers that handle a particular situation themselves
    00110          * can prepopulate it.
    00111          */
    00112         TDS_ERRNO_MESSAGE_FLAGS suppress;
    00113 };
    00114
    00115 /* We use ICONV_CONST for tds_iconv(), even if we don't have iconv() */
    00116 #ifndef ICONV_CONST
    00117 # define ICONV_CONST const
    00118 #endif
    00119
    00120 size_t tds_iconv_fread(iconv_t cd, FILE * stream, size_t field_len, size_t term_len, char *outbuf, size_t * outbytesleft);
    00121 size_t tds_iconv(TDSSOCKET * tds, const TDSICONV * char_conv, TDS_ICONV_DIRECTION io,
    00122                  const char **inbuf, size_t * inbytesleft, char **outbuf, size_t * outbytesleft);
    00123 const char *tds_canonical_charset_name(const char *charset_name);
    00124 const char *tds_sybase_charset_name(const char *charset_name);
    00125 TDSICONV *tds_iconv_get(TDSSOCKET * tds, const char *client_charset, const char *server_charset);
    00126
    00127 #ifdef __cplusplus
    00128 }
    00129 #endif
    00130
    00131 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(__MINGW32__)
    00132 #pragma GCC visibility pop
    00133 #endif
    00134
    00135 #endif /* _tds_iconv_h_ */

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