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/* Access functions for JISX0208 conversion.
   Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
 
   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */
 
#ifndef _JIS0208_H
#define _JIS0208_H      1
 
#include <gconv.h>
#include <stdint.h>
 
/* Struct for table with indeces in UCS mapping table.  */
struct jisx0208_ucs_idx
{
  uint16_t start;
  uint16_t end;
  uint16_t idx;
};
 
/* Conversion table.  */
extern const uint16_t __jis0208_to_ucs[];
 
extern const char __jisx0208_from_ucs4_lat1[256][2];
extern const char __jisx0208_from_ucs4_greek[0xc1][2];
extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx[];
extern const char __jisx0208_from_ucs_tab[][2];
 
static inline uint32_t
jisx0208_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
{
  unsigned char ch = *(*s);
  unsigned char ch2;
  int idx;
 
  if (ch < offset || (ch - offset) <= 0x20)
    return __UNKNOWN_10646_CHAR;
 
  if (avail < 2)
    return 0;
 
  ch2 = (*s)[1];
  if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
    return __UNKNOWN_10646_CHAR;
 
  idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
  if (idx >= 0x1e80)
    return __UNKNOWN_10646_CHAR;
 
  (*s) += 2;
 
  return __jis0208_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
}
 
 
static inline size_t
ucs4_to_jisx0208 (uint32_t wch, char *s, size_t avail)
{
  unsigned int ch = (unsigned int) wch;
  const char *cp;
 
  if (avail < 2)
    return 0;
 
  if (ch < 0x100)
    cp = __jisx0208_from_ucs4_lat1[ch];
  else if (ch >= 0x391 && ch <= 0x451)
    cp = __jisx0208_from_ucs4_greek[ch - 0x391];
  else
    {
      const struct jisx0208_ucs_idx *rp = __jisx0208_from_ucs_idx;
 
      if (ch >= 0xffff)
        return __UNKNOWN_10646_CHAR;
      while (ch > rp->end)
        ++rp;
      if (ch >= rp->start)
        cp = __jisx0208_from_ucs_tab[rp->idx + ch - rp->start];
      else
        return __UNKNOWN_10646_CHAR;
    }
 
  if (cp[0] == '\0')
    return __UNKNOWN_10646_CHAR;
 
  s[0] = cp[0];
  s[1] = cp[1];
 
  return 2;
}
 
#endif /* jis0208.h */

Line No.	Rev	Author	Line
1	207	jeremybenn	`/* Access functions for JISX0208 conversion.`
2			`Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.`
3			`This file is part of the GNU C Library.`
4			`Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.`
5
6			`The GNU C Library is free software; you can redistribute it and/or`
7			`modify it under the terms of the GNU Lesser General Public`
8			`License as published by the Free Software Foundation; either`
9			`version 2.1 of the License, or (at your option) any later version.`
10
11			`The GNU C Library is distributed in the hope that it will be useful,`
12			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
13			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
14			`Lesser General Public License for more details.`
15
16			`You should have received a copy of the GNU Lesser General Public`
17			`License along with the GNU C Library; if not, write to the Free`
18			`Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA`
19			`02111-1307 USA. */`
20
21			`#ifndef _JIS0208_H`
22			`#define _JIS0208_H 1`
23
24			`#include <gconv.h>`
25			`#include <stdint.h>`
26
27			`/* Struct for table with indeces in UCS mapping table. */`
28			`struct jisx0208_ucs_idx`
29			`{`
30			`uint16_t start;`
31			`uint16_t end;`
32			`uint16_t idx;`
33			`};`
34
35			`/* Conversion table. */`
36			`extern const uint16_t __jis0208_to_ucs[];`
37
38			`extern const char __jisx0208_from_ucs4_lat1[256][2];`
39			`extern const char __jisx0208_from_ucs4_greek[0xc1][2];`
40			`extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx[];`
41			`extern const char __jisx0208_from_ucs_tab[][2];`
42
43			`static inline uint32_t`
44			`jisx0208_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)`
45			`{`
46			`unsigned char ch = (s);`
47			`unsigned char ch2;`
48			`int idx;`
49
50			`if (ch < offset \|\| (ch - offset) <= 0x20)`
51			`return __UNKNOWN_10646_CHAR;`
52
53			`if (avail < 2)`
54			`return 0;`
55
56			`ch2 = (*s)[1];`
57			`if (ch2 < offset \|\| (ch2 - offset) <= 0x20 \|\| (ch2 - offset) >= 0x7f)`
58			`return __UNKNOWN_10646_CHAR;`
59
60			`idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);`
61			`if (idx >= 0x1e80)`
62			`return __UNKNOWN_10646_CHAR;`
63
64			`(*s) += 2;`
65
66			`return __jis0208_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);`
67			`}`
68
69
70			`static inline size_t`
71			`ucs4_to_jisx0208 (uint32_t wch, char *s, size_t avail)`
72			`{`
73			`unsigned int ch = (unsigned int) wch;`
74			`const char *cp;`
75
76			`if (avail < 2)`
77			`return 0;`
78
79			`if (ch < 0x100)`
80			`cp = __jisx0208_from_ucs4_lat1[ch];`
81			`else if (ch >= 0x391 && ch <= 0x451)`
82			`cp = __jisx0208_from_ucs4_greek[ch - 0x391];`
83			`else`
84			`{`
85			`const struct jisx0208_ucs_idx *rp = __jisx0208_from_ucs_idx;`
86
87			`if (ch >= 0xffff)`
88			`return __UNKNOWN_10646_CHAR;`
89			`while (ch > rp->end)`
90			`++rp;`
91			`if (ch >= rp->start)`
92			`cp = __jisx0208_from_ucs_tab[rp->idx + ch - rp->start];`
93			`else`
94			`return __UNKNOWN_10646_CHAR;`
95			`}`
96
97			`if (cp[0] == '\0')`
98			`return __UNKNOWN_10646_CHAR;`
99
100			`s[0] = cp[0];`
101			`s[1] = cp[1];`
102
103			`return 2;`
104			`}`
105
106			`#endif /* jis0208.h */`

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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [iconvdata/] [jis0208.h] - Blame information for rev 258