1 /* Generic conversion to and from 8bit charsets,
2 converting from UCS using gaps.
3 Copyright (C) 1997 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If not,
19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
35 /* Now we can include the tables. */
38 /* Direction of the transformation. */
53 gconv_init (struct gconv_step *step, struct gconv_step_data *data)
55 /* Determine which direction. */
56 struct s_8bit_data *new_data;
60 if (__strcasestr (step->from_name, NAME) != NULL)
62 else if (__strcasestr (step->to_name, NAME) != NULL)
67 result = GCONV_NOCONV;
70 = (struct s_8bit_data *) malloc (sizeof (struct s_8bit_data)))
74 data->data = new_data;
83 gconv_end (struct gconv_step_data *data)
90 gconv (struct gconv_step *step, struct gconv_step_data *data,
91 const char *inbuf, size_t *inbufsize, size_t *written, int do_flush)
93 struct gconv_step *next_step = step + 1;
94 struct gconv_step_data *next_data = data + 1;
95 gconv_fct fct = next_step->fct;
99 /* If the function is called with no input this means we have to reset
100 to the initial state. The possibly partly converted input is
106 /* Call the steps down the chain if there are any. */
111 struct gconv_step *next_step = step + 1;
112 struct gconv_step_data *next_data = data + 1;
114 result = (*fct) (next_step, next_data, NULL, 0, written, 1);
116 /* Clear output buffer. */
117 data->outbufavail = 0;
122 enum direction dir = ((struct s_8bit_data *) data->data)->dir;
130 if (dir == from_8bit)
132 size_t inchars = *inbufsize;
133 size_t outwchars = data->outbufavail;
134 char *outbuf = data->outbuf;
138 && (outwchars + sizeof (wchar_t) <= data->outbufsize))
140 wchar_t ch = to_ucs4[(unsigned int) inbuf[cnt]];
142 if (ch == L'\0' && inbuf[cnt] != '\0')
144 /* This is an illegal character. */
145 result = GCONV_ILLEGAL_INPUT;
149 *((wchar_t *) (outbuf + outwchars)) = ch;
151 outwchars += sizeof (wchar_t);
155 data->outbufavail = outwchars;
159 size_t inwchars = *inbufsize;
160 size_t outchars = data->outbufavail;
161 char *outbuf = data->outbuf;
164 while (inwchars >= cnt + sizeof (wchar_t)
165 && outchars < data->outbufsize)
167 const struct gap *rp = from_idx;
168 unsigned int ch = *((wchar_t *) (inbuf + cnt));
174 /* No valid character. */
177 res = from_ucs4[ch + rp->idx];
178 if (res == '\0' && ch != 0)
179 /* No valid character. */
182 outbuf[outchars] = res;
185 cnt += sizeof (wchar_t);
188 data->outbufavail = outchars;
190 if (outchars < data->outbufsize)
192 /* If there is still room in the output buffer something
193 is wrong with the input. */
194 if (inwchars >= cnt + sizeof (wchar_t))
196 /* An error occurred. */
197 result = GCONV_ILLEGAL_INPUT;
202 /* There are some unprocessed bytes at the end of the
204 result = GCONV_INCOMPLETE_INPUT;
210 if (result != GCONV_OK)
215 /* This is the last step. */
216 result = (*inbufsize > (dir == from_8bit
217 ? 0 : sizeof (wchar_t) - 1)
218 ? GCONV_FULL_OUTPUT : GCONV_EMPTY_INPUT);
223 result = GCONV_EMPTY_INPUT;
225 if (data->outbufavail > 0)
227 /* Call the functions below in the chain. */
228 size_t newavail = data->outbufavail;
230 result = (*fct) (next_step, next_data, data->outbuf, &newavail,
233 /* Correct the output buffer. */
234 if (newavail != data->outbufavail && newavail > 0)
236 memmove (data->outbuf,
237 &data->outbuf[data->outbufavail - newavail],
239 data->outbufavail = newavail;
243 while (*inbufsize > 0 && result == GCONV_EMPTY_INPUT);
246 if (written != NULL && data->is_last)