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|
//===========================================================================
//
// mbtowc_jp.cxx
//
// Internal __mbtowc_jp() routine
//
//===========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos 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.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jjohnstn
// Contributors: jjohnstn
// Date: 2000-11-16
// Purpose: Provide internal use __mbtowc_jp() routine
// Description: Japanese locale version of mbtowc()
// Usage:
//
//####DESCRIPTIONEND####
//
//===========================================================================
//
// This code was taken from newlib/libc/stdlib/mbtowc_r.c
// CONFIGURATION
#include <pkgconf/libc_i18n.h> // Configuration header
// INCLUDES
#include <cyg/infra/cyg_type.h> // Common type definitions
#include <cyg/infra/cyg_trac.h> // Tracing support
#include <cyg/infra/cyg_ass.h> // Assertion support
#include <locale.h>
#include <stdlib.h> // Header for this file
#include <string.h> // strcmp definition
#include <stddef.h> // size_t definition
#include "internal.h" // internal __isxxxx macros
// TRACE
#if defined(CYGDBG_USE_TRACING) && defined(CYGNUM_LIBC_STDLIB_MBTOWC_TRACE_LEVEL)
static int mbtowc_trace = CYGNUM_LIBC_STDLIB_MBTOWC_TRACE_LEVEL;
# define TL1 (0 < mbtowc_trace)
#else
# define TL1 (0)
#endif
// STATICS
#ifdef CYGFUN_LIBC_I18N_LOCALE_C_JIS
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, DONE, INV, JIS_S_NUM } JIS_STATE;
typedef enum { COPY_A, COPY_J, COPY_J2, 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, DONE, DONE, DONE, DONE, DONE, DONE, DONE, DONE },
/* A_ESC */ { DONE, A_ESC_DL, DONE, DONE, DONE, DONE, DONE, DONE, DONE },
/* A_ESC_DL */{ DONE, DONE, DONE, JIS, JIS, DONE, DONE, DONE, DONE },
/* 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, DONE, DONE, DONE, DONE, DONE, INV, DONE, DONE },
/* 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, DONE, DONE, 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, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A, EMPTY, COPY_A, COPY_A},
/* A_ESC */ { COPY_A, NOOP, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A},
/* A_ESC_DL */{ COPY_A, COPY_A, COPY_A, MAKE_J, MAKE_J, COPY_A, COPY_A, COPY_A, COPY_A},
/* JIS */ { NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, ERROR, NOOP, ERROR },
/* JIS_1 */ { ERROR, NOOP, NOOP, NOOP, NOOP, NOOP, ERROR, NOOP, ERROR },
/* JIS_2 */ { NOOP, COPY_J2, COPY_J2, COPY_J2, COPY_J2, COPY_J2, ERROR, COPY_J2, COPY_J2},
/* 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, COPY_J, COPY_J, ERROR, ERROR, ERROR },
};
#endif // CYGFUN_LIBC_I18N_LOCALE_C_JIS
// FUNCTIONS
int
__mbtowc_jp ( wchar_t *pwc, const char *s, size_t n, int *state )
{
wchar_t dummy;
unsigned char *t = (unsigned char *)s;
int retval;
const char *cur_locale = __current_ctype_locale->name;
CYG_REPORT_FUNCNAMETYPE( "__mbtowc_jp", "returning %d" );
CYG_REPORT_FUNCARG4( "pwc=%08x, s=%08x, n=%ud, state=%08x", pwc, s, n, state );
if (pwc != NULL)
CYG_CHECK_DATA_PTR( pwc, "pwc is not a valid pointer!" );
if (s != NULL)
CYG_CHECK_DATA_PTR( s, "s is not a valid pointer!" );
CYG_CHECK_DATA_PTR( state, "state is not a valid pointer!" );
if (pwc == NULL)
pwc = &dummy;
if (s != NULL && n == 0)
{
retval = -1;
CYG_REPORT_RETVAL (retval);
return retval;
}
if (cur_locale == NULL ||
(strlen (cur_locale) <= 1))
{ /* fall-through */ }
#ifdef CYGFUN_LIBC_I18N_LOCALE_C_SJIS
else if (!strcmp (cur_locale, "C-SJIS"))
{
int char1;
if (s == NULL)
{
retval = 0;
CYG_REPORT_RETVAL (retval);
return retval; /* not state-dependent */
}
char1 = *t;
if (_issjis1 (char1))
{
int char2 = t[1];
if (n <= 1)
retval = -1;
else if (_issjis2 (char2))
{
*pwc = (((wchar_t)*t) << 8) + (wchar_t)(*(t+1));
retval = 2;
}
else
retval = -1;
CYG_REPORT_RETVAL (retval);
return retval;
}
}
#endif /* CYGFUN_LIBC_I18N_LOCALE_C_SJIS */
#ifdef CYGFUN_LIBC_I18N_LOCALE_C_EUCJP
else if (!strcmp (cur_locale, "C-EUCJP"))
{
int char1;
if (s == NULL)
{
retval = 0; /* not state-dependent */
CYG_REPORT_RETVAL (retval);
return retval; /* not state-dependent */
}
char1 = *t;
if (_iseucjp (char1))
{
int char2 = t[1];
if (n <= 1)
retval = -1;
if (_iseucjp (char2))
{
*pwc = (((wchar_t)*t) << 8) + (wchar_t)(*(t+1));
retval = 2;
}
else
retval = -1;
CYG_REPORT_RETVAL (retval);
return retval;
}
}
#endif /* CYGFUN_LIBC_I18N_LOCALE_C_EUCJP */
#ifdef CYGFUN_LIBC_I18N_LOCALE_C_JIS
else if (!strcmp (cur_locale, "C-JIS"))
{
JIS_STATE curr_state;
JIS_ACTION action;
JIS_CHAR_TYPE ch;
unsigned char *ptr;
int i, curr_ch;
if (s == NULL)
{
*state = 0;
retval = 1;
CYG_REPORT_RETVAL (retval);
return retval; /* state-dependent */
}
curr_state = (*state == 0 ? ASCII : JIS);
ptr = t;
for (i = 0; i < (int)n; ++i)
{
curr_ch = t[i];
switch (curr_ch)
{
case 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:
*state = 0;
*pwc = (wchar_t)0;
retval = i;
CYG_REPORT_RETVAL (retval);
return retval;
case COPY_A:
*state = 0;
*pwc = (wchar_t)*ptr;
retval = i + 1;
CYG_REPORT_RETVAL (retval);
return retval;
case COPY_J:
*state = 0;
*pwc = (((wchar_t)*ptr) << 8) + (wchar_t)(*(ptr+1));
retval = i + 1;
CYG_REPORT_RETVAL (retval);
return retval;
case COPY_J2:
*state = 1;
*pwc = (((wchar_t)*ptr) << 8) + (wchar_t)(*(ptr+1));
retval = (ptr - t) + 2;
CYG_REPORT_RETVAL (retval);
return retval;
case MAKE_A:
case MAKE_J:
ptr = (unsigned char *)(t + i + 1);
break;
case ERROR:
default:
retval = -1;
CYG_REPORT_RETVAL (retval);
return retval;
}
}
retval = -1; /* n < bytes needed */
CYG_REPORT_RETVAL (retval);
return retval;
}
#endif /* CYGFUN_LIBC_I18N_LOCALE_C_JIS */
/* otherwise this must be the "C" locale or unknown locale */
if (s == NULL)
retval = 0; /* not state-dependent */
else
{
if (pwc)
*pwc = (wchar_t)*t;
retval = (*t != '\0');
}
CYG_REPORT_RETVAL (retval);
return retval;
} // __mbtowc_jp()
// EOF mbtowc_jp.cxx
|
