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# 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 1.36 2007/03/12 13:28:50 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
    00054 #pragma GCC visibility push(hidden)
    00055 #endif
    00056
    00057 #ifdef __cplusplus
    00058 extern "C"
    00059 {
    00060 #endif
    00061
    00062 #if ! HAVE_ICONV
    00063
    00064         /* FYI, the first 4 entries look like this:
    00065          *      {"ISO-8859-1",  1, 1}, -> 0
    00066          *      {"US-ASCII",    1, 4}, -> 1
    00067          *      {"UCS-2LE",     2, 2}, -> 2
    00068          *      {"UCS-2BE",     2, 2}, -> 3
    00069          *
    00070          * These conversions are supplied by src/replacements/iconv.c for the sake of those who don't
    00071          * have or otherwise need an iconv.
    00072          */
    00073 enum ICONV_CD_VALUE
    00074 {
    00075           Like_to_Like = 0x100
    00076         , Latin1_ASCII  = 0x01
    00077         , ASCII_Latin1  = 0x10
    00078
    00079         , Latin1_UCS2LE = 0x02
    00080         , UCS2LE_Latin1 = 0x20
    00081         , ASCII_UCS2LE  = 0x12
    00082         , UCS2LE_ASCII  = 0x21
    00083
    00084         , Latin1_UTF8   = 0x03
    00085         , UTF8_Latin1   = 0x30
    00086         , ASCII_UTF8    = 0x13
    00087         , UTF8_ASCII    = 0x31
    00088         , UCS2LE_UTF8   = 0x23
    00089         , UTF8_UCS2LE   = 0x32
    00090
    00091 #ifdef DOS32X
    00092         , WinEE_UCS2LE  = 0x42
    00093         , UCS2LE_WinEE  = 0x24
    00094         , WinCYR_UCS2LE = 0x52
    00095         , UCS2LE_WinCYR = 0x25
    00096         , WinTUR_UCS2LE = 0x62
    00097         , UCS2LE_WinTUR = 0x26
    00098         , WinARA_UCS2LE = 0x72
    00099         , UCS2LE_WinARA = 0x27
    00100 #endif
    00101         /* these aren't needed
    00102          * , Latin1_UCS2BE = 0x03
    00103          * , UCS2BE_Latin1 = 0x30
    00104          */
    00105 };
    00106
    00107 iconv_t tds_sys_iconv_open(const char *tocode, const char *fromcode);
    00108 size_t tds_sys_iconv(iconv_t cd, const char **inbuf, size_t * inbytesleft, char **outbuf, size_t * outbytesleft);
    00109 int tds_sys_iconv_close(iconv_t cd);
    00110 #else
    00111 #define tds_sys_iconv_open iconv_open
    00112 #define tds_sys_iconv iconv
    00113 #define tds_sys_iconv_close iconv_close
    00114 #endif /* !HAVE_ICONV */
    00115
    00116
    00117 typedef enum
    00118 { to_server, to_client } TDS_ICONV_DIRECTION;
    00119
    00120 typedef struct _character_set_alias
    00121 {
    00122         const char *alias;
    00123         int canonic;
    00124 } CHARACTER_SET_ALIAS;
    00125
    00126 typedef struct _tds_errno_message_flags {
    00127         unsigned int e2big:1;
    00128         unsigned int eilseq:1;
    00129         unsigned int einval:1;
    00130 } TDS_ERRNO_MESSAGE_FLAGS;
    00131
    00132 struct tdsiconvinfo
    00133 {
    00134         TDS_ENCODING client_charset;
    00135         TDS_ENCODING server_charset;
    00136
    00137 #define TDS_ENCODING_INDIRECT 1
    00138 #define TDS_ENCODING_SWAPBYTE 2
    00139 #define TDS_ENCODING_MEMCPY   4
    00140         unsigned int flags;
    00141
    00142         iconv_t to_wire;        /* conversion from client charset to server's format */
    00143         iconv_t from_wire;      /* conversion from server's format to client charset */
    00144
    00145         iconv_t to_wire2;       /* conversion from client charset to server's format - indirect */
    00146         iconv_t from_wire2;     /* conversion from server's format to client charset - indirect */
    00147
    00148         /*
    00149          * Suppress error messages that would otherwise be emitted by tds_iconv().
    00150          * Functions that process large buffers ask tds_iconv to convert it in "chunks".
    00151          * We don't want to emit spurious EILSEQ errors or multiple errors for one
    00152          * buffer.  tds_iconv() checks this structure before emiting a message, and
    00153          * adds to it whenever it emits one.  Callers that handle a particular situation themselves
    00154          * can prepopulate it.
    00155          */
    00156         TDS_ERRNO_MESSAGE_FLAGS suppress;
    00157 };
    00158
    00159 /* We use ICONV_CONST for tds_iconv(), even if we don't have iconv() */
    00160 #ifndef ICONV_CONST
    00161 # define ICONV_CONST const
    00162 #endif
    00163
    00164 size_t tds_iconv_fread(iconv_t cd, FILE * stream, size_t field_len, size_t term_len, char *outbuf, size_t * outbytesleft);
    00165 size_t tds_iconv(TDSSOCKET * tds, const TDSICONV * char_conv, TDS_ICONV_DIRECTION io,
    00166                  const char **inbuf, size_t * inbytesleft, char **outbuf, size_t * outbytesleft);
    00167 const char *tds_canonical_charset_name(const char *charset_name);
    00168 const char *tds_sybase_charset_name(const char *charset_name);
    00169
    00170 #ifdef __cplusplus
    00171 }
    00172 #endif
    00173
    00174 #if defined(__GNUC__) && __GNUC__ >= 4
    00175 #pragma GCC visibility pop
    00176 #endif
    00177
    00178 #endif /* _tds_iconv_h_ */