The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/iconv.h

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    1 /*-
    2  * Copyright (c) 2000-2001 Boris Popov
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/11.2/sys/sys/iconv.h 331722 2018-03-29 02:50:57Z eadler $
   27  */
   28 #ifndef _SYS_ICONV_H_
   29 #define _SYS_ICONV_H_
   30 
   31 #define ICONV_CSNMAXLEN         31      /* maximum length of charset name */
   32 #define ICONV_CNVNMAXLEN        31      /* maximum length of converter name */
   33 /* maximum size of data associated with cs pair */
   34 #define ICONV_CSMAXDATALEN      (sizeof(caddr_t) * 0x200 + sizeof(uint32_t) * 0x200 * 0x80)
   35 
   36 #define XLAT16_ACCEPT_NULL_OUT          0x01000000
   37 #define XLAT16_ACCEPT_NULL_IN           0x02000000
   38 #define XLAT16_HAS_LOWER_CASE           0x04000000
   39 #define XLAT16_HAS_UPPER_CASE           0x08000000
   40 #define XLAT16_HAS_FROM_LOWER_CASE      0x10000000
   41 #define XLAT16_HAS_FROM_UPPER_CASE      0x20000000
   42 #define XLAT16_IS_3BYTE_CHR             0x40000000
   43 
   44 #define KICONV_LOWER            1       /* tolower converted character */
   45 #define KICONV_UPPER            2       /* toupper converted character */
   46 #define KICONV_FROM_LOWER       4       /* tolower source character, then convert */
   47 #define KICONV_FROM_UPPER       8       /* toupper source character, then convert */
   48 #define KICONV_WCTYPE           16      /* towlower/towupper characters */
   49 
   50 #define ENCODING_UNICODE        "UTF-16BE"
   51 #define KICONV_WCTYPE_NAME      "_wctype"
   52 
   53 /*
   54  * Entry for cslist sysctl
   55  */
   56 #define ICONV_CSPAIR_INFO_VER   1
   57 
   58 struct iconv_cspair_info {
   59         int     cs_version;
   60         int     cs_id;
   61         int     cs_base;
   62         int     cs_refcount;
   63         char    cs_to[ICONV_CSNMAXLEN];
   64         char    cs_from[ICONV_CSNMAXLEN];
   65 };
   66 
   67 /*
   68  * Parameters for 'add' sysctl
   69  */
   70 #define ICONV_ADD_VER   1
   71 
   72 struct iconv_add_in {
   73         int     ia_version;
   74         char    ia_converter[ICONV_CNVNMAXLEN];
   75         char    ia_to[ICONV_CSNMAXLEN];
   76         char    ia_from[ICONV_CSNMAXLEN];
   77         int     ia_datalen;
   78         const void *ia_data;
   79 };
   80 
   81 struct iconv_add_out {
   82         int     ia_csid;
   83 };
   84 
   85 #ifndef _KERNEL
   86 
   87 __BEGIN_DECLS
   88 
   89 #define KICONV_VENDOR_MICSFT    1       /* Microsoft Vendor Code for quirk */
   90 
   91 int   kiconv_add_xlat_table(const char *, const char *, const u_char *);
   92 int   kiconv_add_xlat16_cspair(const char *, const char *, int);
   93 int   kiconv_add_xlat16_cspairs(const char *, const char *);
   94 int   kiconv_add_xlat16_table(const char *, const char *, const void *, int);
   95 int   kiconv_lookupconv(const char *drvname);
   96 int   kiconv_lookupcs(const char *tocode, const char *fromcode);
   97 const char *kiconv_quirkcs(const char *, int);
   98 
   99 __END_DECLS
  100 
  101 #else /* !_KERNEL */
  102 
  103 #include <sys/kobj.h>
  104 #include <sys/module.h>                 /* can't avoid that */
  105 #include <sys/queue.h>                  /* can't avoid that */
  106 #include <sys/sysctl.h>                 /* can't avoid that */
  107 
  108 struct iconv_cspair;
  109 struct iconv_cspairdata;
  110 
  111 /*
  112  * iconv converter class definition
  113  */
  114 struct iconv_converter_class {
  115         KOBJ_CLASS_FIELDS;
  116         TAILQ_ENTRY(iconv_converter_class)      cc_link;
  117 };
  118 
  119 struct iconv_cspair {
  120         int             cp_id;          /* unique id of charset pair */
  121         int             cp_refcount;    /* number of references from other pairs */
  122         const char *    cp_from;
  123         const char *    cp_to;
  124         void *          cp_data;
  125         struct iconv_converter_class * cp_dcp;
  126         struct iconv_cspair *cp_base;
  127         TAILQ_ENTRY(iconv_cspair)       cp_link;
  128 };
  129 
  130 #define KICONV_CONVERTER(name,size)                     \
  131     static struct iconv_converter_class iconv_ ## name ## _class = { \
  132         "iconv_"#name, iconv_ ## name ## _methods, size, NULL \
  133     };                                                  \
  134     static moduledata_t iconv_ ## name ## _mod = {      \
  135         "iconv_"#name, iconv_converter_handler,         \
  136         (void*)&iconv_ ## name ## _class                \
  137     };                                                  \
  138     DECLARE_MODULE(iconv_ ## name, iconv_ ## name ## _mod, SI_SUB_DRIVERS, SI_ORDER_ANY);
  139 
  140 #define KICONV_CES(name,size)                           \
  141     static DEFINE_CLASS(iconv_ces_ ## name, iconv_ces_ ## name ## _methods, (size)); \
  142     static moduledata_t iconv_ces_ ## name ## _mod = {  \
  143         "iconv_ces_"#name, iconv_cesmod_handler,        \
  144         (void*)&iconv_ces_ ## name ## _class            \
  145     };                                                  \
  146     DECLARE_MODULE(iconv_ces_ ## name, iconv_ces_ ## name ## _mod, SI_SUB_DRIVERS, SI_ORDER_ANY);
  147 
  148 #ifdef MALLOC_DECLARE
  149 MALLOC_DECLARE(M_ICONV);
  150 #endif
  151 
  152 /*
  153  * Basic conversion functions
  154  */
  155 int iconv_open(const char *to, const char *from, void **handle);
  156 int iconv_close(void *handle);
  157 int iconv_conv(void *handle, const char **inbuf,
  158         size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
  159 int iconv_conv_case(void *handle, const char **inbuf,
  160         size_t *inbytesleft, char **outbuf, size_t *outbytesleft, int casetype);
  161 int iconv_convchr(void *handle, const char **inbuf,
  162         size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
  163 int iconv_convchr_case(void *handle, const char **inbuf,
  164         size_t *inbytesleft, char **outbuf, size_t *outbytesleft, int casetype);
  165 int iconv_add(const char *converter, const char *to, const char *from);
  166 char* iconv_convstr(void *handle, char *dst, const char *src);
  167 void* iconv_convmem(void *handle, void *dst, const void *src, int size);
  168 int iconv_vfs_refcount(const char *fsname);
  169 
  170 int towlower(int c, void *handle);
  171 int towupper(int c, void *handle);
  172 
  173 /*
  174  * Bridge struct of iconv functions
  175  */
  176 struct iconv_functions {
  177         int (*open)(const char *to, const char *from, void **handle);
  178         int (*close)(void *handle);
  179         int (*conv)(void *handle, const char **inbuf, size_t *inbytesleft,
  180                 char **outbuf, size_t *outbytesleft);
  181         int (*conv_case)(void *handle, const char **inbuf, size_t *inbytesleft,
  182                 char **outbuf, size_t *outbytesleft, int casetype);
  183         int (*convchr)(void *handle, const char **inbuf, size_t *inbytesleft,
  184                 char **outbuf, size_t *outbytesleft);
  185         int (*convchr_case)(void *handle, const char **inbuf, size_t *inbytesleft,
  186                 char **outbuf, size_t *outbytesleft, int casetype);
  187 };
  188 
  189 #define VFS_DECLARE_ICONV(fsname)                                       \
  190         static struct iconv_functions fsname ## _iconv_core = {         \
  191                 iconv_open,                                             \
  192                 iconv_close,                                            \
  193                 iconv_conv,                                             \
  194                 iconv_conv_case,                                        \
  195                 iconv_convchr,                                          \
  196                 iconv_convchr_case                                      \
  197         };                                                              \
  198         extern struct iconv_functions *fsname ## _iconv;                \
  199         static int fsname ## _iconv_mod_handler(module_t mod,           \
  200                 int type, void *d);                                     \
  201         static int                                                      \
  202         fsname ## _iconv_mod_handler(module_t mod, int type, void *d)   \
  203         {                                                               \
  204                 int error = 0;                                          \
  205                 switch(type) {                                          \
  206                 case MOD_LOAD:                                          \
  207                         fsname ## _iconv = & fsname ## _iconv_core;     \
  208                         break;                                          \
  209                 case MOD_UNLOAD:                                        \
  210                         error = iconv_vfs_refcount(#fsname);            \
  211                         if (error)                                      \
  212                                 return (EBUSY);                         \
  213                         fsname ## _iconv = NULL;                        \
  214                         break;                                          \
  215                 default:                                                \
  216                         error = EINVAL;                                 \
  217                         break;                                          \
  218                 }                                                       \
  219                 return (error);                                         \
  220         }                                                               \
  221         static moduledata_t fsname ## _iconv_mod = {                    \
  222                 #fsname"_iconv",                                        \
  223                 fsname ## _iconv_mod_handler,                           \
  224                 NULL                                                    \
  225         };                                                              \
  226         DECLARE_MODULE(fsname ## _iconv, fsname ## _iconv_mod,          \
  227                        SI_SUB_DRIVERS, SI_ORDER_ANY);                   \
  228         MODULE_DEPEND(fsname ## _iconv, fsname, 1, 1, 1);               \
  229         MODULE_DEPEND(fsname ## _iconv, libiconv, 2, 2, 2);             \
  230         MODULE_VERSION(fsname ## _iconv, 1)
  231 
  232 /*
  233  * Internal functions
  234  */
  235 int iconv_lookupcp(char **cpp, const char *s);
  236 
  237 int iconv_converter_initstub(struct iconv_converter_class *dp);
  238 int iconv_converter_donestub(struct iconv_converter_class *dp);
  239 int iconv_converter_tolowerstub(int c, void *handle);
  240 int iconv_converter_handler(module_t mod, int type, void *data);
  241 
  242 #ifdef ICONV_DEBUG
  243 #define ICDEBUG(format, ...) printf("%s: "format, __func__ , ## __VA_ARGS__)
  244 #else
  245 #define ICDEBUG(format, ...)
  246 #endif
  247 
  248 #endif /* !_KERNEL */
  249 
  250 #endif /* !_SYS_ICONV_H_ */

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