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-rwxr-xr-xgcc/mbchar.c290
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diff --git a/gcc/mbchar.c b/gcc/mbchar.c
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-/* Multibyte Character Functions.
- Copyright (C) 1998 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* These functions are used to manipulate multibyte characters. */
-
-/* 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). */
-
-#ifdef MULTIBYTE_CHARS
-#include "config.h"
-#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 OTHER*/
-/*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 OTHER */
-/*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 },
-};
-
-
-char *literal_codeset = NULL;
-
-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;
- unsigned char *t = (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)
- return 0; /* not state-dependent */
- 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)
- return 0; /* not state-dependent */
- 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;
- unsigned char *ptr;
- int i, curr_ch;
-
- if (s == NULL)
- {
- save_state = ASCII;
- return 1; /* state-dependent */
- }
-
- 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 = (char *)(t + i + 1);
- break;
- case ERROR:
- default:
- return -1;
- }
- }
-
- return -1; /* n < bytes needed */
- }
-
-#ifdef CROSS_COMPILE
- if (s == NULL)
- return 0; /* not state-dependent */
- if (pwc != NULL)
- *pwc = *s;
- return 1;
-#else
- /* This must be the "C" locale or unknown locale. */
- return mbtowc (pwc, s, n);
-#endif
-}
-
-int
-local_mblen (s, n)
- const char *s;
- size_t n;
-{
- return local_mbtowc (NULL, s, n);
-}
-
-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
-}
-#endif /* MULTIBYTE_CHARS */
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