iconv/gconv_builtin.c

   1 /* Table for builtin transformation mapping.
   2    Copyright (C) 1997-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <endian.h>
  20 #include <limits.h>
  21 #include <stdint.h>
  22 #include <string.h>
  23
  24 #include <gconv_int.h>
  25
  26 #include <assert.h>
  27
  28
  29 static const struct builtin_map
  30 {
  31   const char *name;
  32   __gconv_fct fct;
  33   __gconv_btowc_fct btowc_fct;
  34
  35   int8_t min_needed_from;
  36   int8_t max_needed_from;
  37   int8_t min_needed_to;
  38   int8_t max_needed_to;
  39
  40 } map[] =
  41 {
  42 #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \
  43                                MinF, MaxF, MinT, MaxT) \
  44   {                                                                           \
  45     .name = Name,                                                             \
  46     .fct = Fct,                                                               \
  47     .btowc_fct = BtowcFct,                                                    \
  48                                                                               \
  49     .min_needed_from = MinF,                                                  \
  50     .max_needed_from = MaxF,                                                  \
  51     .min_needed_to = MinT,                                                    \
  52     .max_needed_to = MaxT                                                     \
  53   },
  54 #define BUILTIN_ALIAS(From, To)
  55
  56 #include <gconv_builtin.h>
  57 };
  58
  59
  60 void
  61 __gconv_get_builtin_trans (const char *name, struct __gconv_step *step)
  62 {
  63   size_t cnt;
  64
  65   for (cnt = 0; cnt < sizeof (map) / sizeof (map[0]); ++cnt)
  66     if (strcmp (name, map[cnt].name) == 0)
  67       break;
  68
  69   assert (cnt < sizeof (map) / sizeof (map[0]));
  70
  71   step->__fct = map[cnt].fct;
  72   step->__btowc_fct = map[cnt].btowc_fct;
  73   step->__init_fct = NULL;
  74   step->__end_fct = NULL;
  75   step->__shlib_handle = NULL;
  76   step->__modname = NULL;
  77
  78   step->__min_needed_from = map[cnt].min_needed_from;
  79   step->__max_needed_from = map[cnt].max_needed_from;
  80   step->__min_needed_to = map[cnt].min_needed_to;
  81   step->__max_needed_to = map[cnt].max_needed_to;
  82
  83   /* None of the builtin converters handles stateful encoding.  */
  84   step->__stateful = 0;
  85 }