+++ /dev/null
-/* Multibyte Character Functions.
- Copyright (C) 1998 Free Software Foundation, Inc.
-
-This file is part of GCC.
-
-GCC is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
-version.
-
-GCC 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 General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
-
-/* Note regarding cross compilation:
-
- In general, translation of multibyte characters to wide characters can
- only work in a native compiler since the translation function (mbtowc)
- needs to know about both the source and target character encoding. However,
- this particular implementation for JIS, SJIS and EUCJP source characters
- will work for any compiler with a newlib target. Other targets may also
- work provided that their wchar_t implementation is 2 bytes and the encoding
- leaves the source character values unchanged (except for removing the
- state shifting markers). */
-
-#include "config.h"
-#ifdef MULTIBYTE_CHARS
-#include "system.h"
-#include "mbchar.h"
-#include <locale.h>
-
-typedef enum {ESCAPE, DOLLAR, BRACKET, AT, B, J, NUL, JIS_CHAR, OTHER,
- JIS_C_NUM} JIS_CHAR_TYPE;
-
-typedef enum {ASCII, A_ESC, A_ESC_DL, JIS, JIS_1, JIS_2, J_ESC, J_ESC_BR,
- J2_ESC, J2_ESC_BR, INV, JIS_S_NUM} JIS_STATE;
-
-typedef enum {COPYA, COPYJ, COPYJ2, MAKE_A, MAKE_J, NOOP,
- EMPTY, ERROR} JIS_ACTION;
-
-/* State/action tables for processing JIS encoding:
-
- Where possible, switches to JIS are grouped with proceding JIS characters
- and switches to ASCII are grouped with preceding JIS characters.
- Thus, maximum returned length is:
- 2 (switch to JIS) + 2 (JIS characters) + 2 (switch back to ASCII) = 6. */
-
-static JIS_STATE JIS_state_table[JIS_S_NUM][JIS_C_NUM] = {
-/* ESCAPE DOLLAR BRACKET AT B J NUL JIS_CHAR OTH*/
-/*ASCII*/ { A_ESC, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,ASCII,ASCII},
-/*A_ESC*/ { ASCII, A_ESC_DL,ASCII, ASCII, ASCII, ASCII, ASCII,ASCII,ASCII},
-/*A_ESC_DL*/{ ASCII, ASCII, ASCII, JIS, JIS, ASCII, ASCII,ASCII,ASCII},
-/*JIS*/ { J_ESC, JIS_1, JIS_1, JIS_1, JIS_1, JIS_1, INV, JIS_1,INV },
-/*JIS_1*/ { INV, JIS_2, JIS_2, JIS_2, JIS_2, JIS_2, INV, JIS_2,INV },
-/*JIS_2*/ { J2_ESC,JIS, JIS, JIS, JIS, JIS, INV, JIS, JIS },
-/*J_ESC*/ { INV, INV, J_ESC_BR, INV, INV, INV, INV, INV, INV },
-/*J_ESC_BR*/{ INV, INV, INV, INV, ASCII, ASCII, INV, INV, INV },
-/*J2_ESC*/ { INV, INV, J2_ESC_BR,INV, INV, INV, INV, INV, INV },
-/*J2_ESC_BR*/{INV, INV, INV, INV, ASCII, ASCII, INV, INV, INV },
-};
-
-static JIS_ACTION JIS_action_table[JIS_S_NUM][JIS_C_NUM] = {
-/* ESCAPE DOLLAR BRACKET AT B J NUL JIS_CHAR OTH */
-/*ASCII */ {NOOP, COPYA, COPYA, COPYA, COPYA, COPYA, EMPTY, COPYA, COPYA},
-/*A_ESC */ {COPYA, NOOP, COPYA, COPYA, COPYA, COPYA, COPYA, COPYA, COPYA},
-/*A_ESC_DL */{COPYA, COPYA, COPYA, MAKE_J, MAKE_J, COPYA, COPYA, COPYA, COPYA},
-/*JIS */ {NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, ERROR, NOOP, ERROR},
-/*JIS_1 */ {ERROR, NOOP, NOOP, NOOP, NOOP, NOOP, ERROR, NOOP, ERROR},
-/*JIS_2 */ {NOOP, COPYJ2,COPYJ2,COPYJ2, COPYJ2, COPYJ2,ERROR, COPYJ2,COPYJ2},
-/*J_ESC */ {ERROR, ERROR, NOOP, ERROR, ERROR, ERROR, ERROR, ERROR, ERROR},
-/*J_ESC_BR */{ERROR, ERROR, ERROR, ERROR, NOOP, NOOP, ERROR, ERROR, ERROR},
-/*J2_ESC */ {ERROR, ERROR, NOOP, ERROR, ERROR, ERROR, ERROR, ERROR, ERROR},
-/*J2_ESC_BR*/{ERROR, ERROR, ERROR, ERROR, COPYJ, COPYJ, ERROR, ERROR, ERROR},
-};
-
-
-const char *literal_codeset = NULL;
-
-/* Store into *PWC (if PWC is not null) the wide character
- corresponding to the multibyte character at the start of the
- buffer S of size N. Return the number of bytes in the multibyte
- character. Return -1 if the bytes do not form a valid character,
- or 0 if S is null or points to a null byte.
-
- This function behaves like the Standard C function mbtowc, except
- it treats locale names of the form "C-..." specially. */
-
-int
-local_mbtowc (pwc, s, n)
- wchar_t *pwc;
- const char *s;
- size_t n;
-{
- static JIS_STATE save_state = ASCII;
- JIS_STATE curr_state = save_state;
- const unsigned char *t = (const unsigned char *) s;
-
- if (s != NULL && n == 0)
- return -1;
-
- if (literal_codeset == NULL || strlen (literal_codeset) <= 1)
- /* This must be the "C" locale or unknown locale -- fall thru */
- ;
- else if (! strcmp (literal_codeset, "C-SJIS"))
- {
- int char1;
- if (s == NULL)
- /* Not state-dependent. */
- return 0;
-
- char1 = *t;
- if (ISSJIS1 (char1))
- {
- int char2 = t[1];
-
- if (n <= 1)
- return -1;
-
- if (ISSJIS2 (char2))
- {
- if (pwc != NULL)
- *pwc = (((wchar_t) *t) << 8) + (wchar_t) (*(t + 1));
- return 2;
- }
-
- return -1;
- }
-
- if (pwc != NULL)
- *pwc = (wchar_t) *t;
-
- if (*t == '\0')
- return 0;
-
- return 1;
- }
- else if (! strcmp (literal_codeset, "C-EUCJP"))
- {
- int char1;
-
- if (s == NULL)
- /* Not state-dependent. */
- return 0;
-
- char1 = *t;
- if (ISEUCJP (char1))
- {
- int char2 = t[1];
-
- if (n <= 1)
- return -1;
-
- if (ISEUCJP (char2))
- {
- if (pwc != NULL)
- *pwc = (((wchar_t) *t) << 8) + (wchar_t) (*(t + 1));
- return 2;
- }
-
- return -1;
- }
-
- if (pwc != NULL)
- *pwc = (wchar_t) *t;
-
- if (*t == '\0')
- return 0;
-
- return 1;
- }
- else if (! strcmp (literal_codeset, "C-JIS"))
- {
- JIS_ACTION action;
- JIS_CHAR_TYPE ch;
- const unsigned char *ptr;
- size_t i, curr_ch;
-
- if (s == NULL)
- {
- save_state = ASCII;
- /* State-dependent. */
- return 1;
- }
-
- ptr = t;
-
- for (i = 0; i < n; i++)
- {
- curr_ch = t[i];
- switch (curr_ch)
- {
- case JIS_ESC_CHAR:
- ch = ESCAPE;
- break;
- case '$':
- ch = DOLLAR;
- break;
- case '@':
- ch = AT;
- break;
- case '(':
- ch = BRACKET;
- break;
- case 'B':
- ch = B;
- break;
- case 'J':
- ch = J;
- break;
- case '\0':
- ch = NUL;
- break;
- default:
- if (ISJIS (curr_ch))
- ch = JIS_CHAR;
- else
- ch = OTHER;
- }
-
- action = JIS_action_table[curr_state][ch];
- curr_state = JIS_state_table[curr_state][ch];
-
- switch (action)
- {
- case NOOP:
- break;
-
- case EMPTY:
- if (pwc != NULL)
- *pwc = (wchar_t) 0;
-
- save_state = curr_state;
- return i;
-
- case COPYA:
- if (pwc != NULL)
- *pwc = (wchar_t) *ptr;
- save_state = curr_state;
- return i + 1;
-
- case COPYJ:
- if (pwc != NULL)
- *pwc = (((wchar_t) *ptr) << 8) + (wchar_t) (*(ptr + 1));
-
- save_state = curr_state;
- return i + 1;
-
- case COPYJ2:
- if (pwc != NULL)
- *pwc = (((wchar_t) *ptr) << 8) + (wchar_t) (*(ptr + 1));
-
- save_state = curr_state;
- return ptr - t + 2;
-
- case MAKE_A:
- case MAKE_J:
- ptr = (const unsigned char *) (t + i + 1);
- break;
-
- case ERROR:
- default:
- return -1;
- }
- }
-
- /* More than n bytes needed. */
- return -1;
- }
-
-#ifdef CROSS_COMPILE
- if (s == NULL)
- /* Not state-dependent. */
- return 0;
-
- if (pwc != NULL)
- *pwc = *s;
- return 1;
-#else
-
- /* This must be the "C" locale or unknown locale. */
- return mbtowc (pwc, s, n);
-#endif
-}
-
-/* Return the number of bytes in the multibyte character at the start
- of the buffer S of size N. Return -1 if the bytes do not form a
- valid character, or 0 if S is null or points to a null byte.
-
- This function behaves like the Standard C function mblen, except
- it treats locale names of the form "C-..." specially. */
-
-int
-local_mblen (s, n)
- const char *s;
- size_t n;
-{
- return local_mbtowc (NULL, s, n);
-}
-
-/* Return the maximum mumber of bytes in a multibyte character.
-
- This function returns the same value as the Standard C macro MB_CUR_MAX,
- except it treats locale names of the form "C-..." specially. */
-
-int
-local_mb_cur_max ()
-{
- if (literal_codeset == NULL || strlen (literal_codeset) <= 1)
- ;
- else if (! strcmp (literal_codeset, "C-SJIS"))
- return 2;
- else if (! strcmp (literal_codeset, "C-EUCJP"))
- return 2;
- else if (! strcmp (literal_codeset, "C-JIS"))
- return 8; /* 3 + 2 + 3 */
-
-#ifdef CROSS_COMPILE
- return 1;
-#else
- if (MB_CUR_MAX > 0)
- return MB_CUR_MAX;
-
- return 1; /* default */
-#endif
-}
-#else /* MULTIBYTE_CHARS */
-extern int dummy; /* silence 'ANSI C forbids an empty source file' warning */
-#endif /* MULTIBYTE_CHARS */
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