647 lines
15 KiB
C
647 lines
15 KiB
C
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#include <newlib.h>
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#include <stdlib.h>
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#include <locale.h>
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#include "mbctype.h"
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#include <wchar.h>
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#include <string.h>
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#include <errno.h>
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#include "local.h"
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int (*__mbtowc) (struct _reent *, wchar_t *, const char *, size_t,
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const char *, mbstate_t *)
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#ifdef __CYGWIN__
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/* Cygwin starts up in UTF-8 mode. */
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= __utf8_mbtowc;
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#else
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= __ascii_mbtowc;
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#endif
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int
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_DEFUN (_mbtowc_r, (r, pwc, s, n, state),
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struct _reent *r _AND
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wchar_t *pwc _AND
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const char *s _AND
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size_t n _AND
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mbstate_t *state)
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{
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return __mbtowc (r, pwc, s, n, __locale_charset (), state);
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}
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int
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_DEFUN (__ascii_mbtowc, (r, pwc, s, n, charset, state),
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struct _reent *r _AND
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wchar_t *pwc _AND
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const char *s _AND
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size_t n _AND
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const char *charset _AND
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mbstate_t *state)
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{
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wchar_t dummy;
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unsigned char *t = (unsigned char *)s;
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if (pwc == NULL)
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pwc = &dummy;
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if (s == NULL)
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return 0;
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if (n == 0)
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return -2;
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#ifdef __CYGWIN__
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if ((wchar_t)*t >= 0x80)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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#endif
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*pwc = (wchar_t)*t;
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if (*t == '\0')
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return 0;
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return 1;
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}
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#ifdef _MB_CAPABLE
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typedef enum { ESCAPE, DOLLAR, BRACKET, AT, B, J,
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NUL, JIS_CHAR, OTHER, JIS_C_NUM } JIS_CHAR_TYPE;
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typedef enum { ASCII, JIS, A_ESC, A_ESC_DL, JIS_1, J_ESC, J_ESC_BR,
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INV, JIS_S_NUM } JIS_STATE;
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typedef enum { COPY_A, COPY_J1, COPY_J2, MAKE_A, NOOP, EMPTY, ERROR } JIS_ACTION;
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/**************************************************************************************
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* state/action tables for processing JIS encoding
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* Where possible, switches to JIS are grouped with proceding JIS characters and switches
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* to ASCII are grouped with preceding JIS characters. Thus, maximum returned length
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* is 2 (switch to JIS) + 2 (JIS characters) + 2 (switch back to ASCII) = 6.
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*************************************************************************************/
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static JIS_STATE JIS_state_table[JIS_S_NUM][JIS_C_NUM] = {
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/* ESCAPE DOLLAR BRACKET AT B J NUL JIS_CHAR OTHER */
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/* ASCII */ { A_ESC, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII },
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/* JIS */ { J_ESC, JIS_1, JIS_1, JIS_1, JIS_1, JIS_1, INV, JIS_1, INV },
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/* A_ESC */ { ASCII, A_ESC_DL, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII },
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/* A_ESC_DL */{ ASCII, ASCII, ASCII, JIS, JIS, ASCII, ASCII, ASCII, ASCII },
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/* JIS_1 */ { INV, JIS, JIS, JIS, JIS, JIS, INV, JIS, INV },
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/* J_ESC */ { INV, INV, J_ESC_BR, INV, INV, INV, INV, INV, INV },
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/* J_ESC_BR */{ INV, INV, INV, INV, ASCII, ASCII, INV, INV, INV },
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};
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static JIS_ACTION JIS_action_table[JIS_S_NUM][JIS_C_NUM] = {
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/* ESCAPE DOLLAR BRACKET AT B J NUL JIS_CHAR OTHER */
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/* ASCII */ { NOOP, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A, EMPTY, COPY_A, COPY_A},
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/* JIS */ { NOOP, COPY_J1, COPY_J1, COPY_J1, COPY_J1, COPY_J1, ERROR, COPY_J1, ERROR },
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/* A_ESC */ { COPY_A, NOOP, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A, COPY_A},
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/* A_ESC_DL */{ COPY_A, COPY_A, COPY_A, NOOP, NOOP, COPY_A, COPY_A, COPY_A, COPY_A},
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/* JIS_1 */ { ERROR, COPY_J2, COPY_J2, COPY_J2, COPY_J2, COPY_J2, ERROR, COPY_J2, ERROR },
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/* J_ESC */ { ERROR, ERROR, NOOP, ERROR, ERROR, ERROR, ERROR, ERROR, ERROR },
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/* J_ESC_BR */{ ERROR, ERROR, ERROR, ERROR, MAKE_A, MAKE_A, ERROR, ERROR, ERROR },
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};
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/* we override the mbstate_t __count field for more complex encodings and use it store a state value */
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#define __state __count
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#ifdef _MB_EXTENDED_CHARSETS_ISO
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int
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_DEFUN (__iso_mbtowc, (r, pwc, s, n, charset, state),
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struct _reent *r _AND
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wchar_t *pwc _AND
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const char *s _AND
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size_t n _AND
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const char *charset _AND
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mbstate_t *state)
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{
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wchar_t dummy;
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unsigned char *t = (unsigned char *)s;
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if (pwc == NULL)
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pwc = &dummy;
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if (s == NULL)
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return 0;
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if (n == 0)
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return -2;
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if (*t >= 0xa0)
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{
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int iso_idx = __iso_8859_index (charset + 9);
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if (iso_idx >= 0)
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{
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*pwc = __iso_8859_conv[iso_idx][*t - 0xa0];
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if (*pwc == 0) /* Invalid character */
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{
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r->_errno = EILSEQ;
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return -1;
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}
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return 1;
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}
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}
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*pwc = (wchar_t) *t;
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if (*t == '\0')
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return 0;
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return 1;
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}
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#endif /* _MB_EXTENDED_CHARSETS_ISO */
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#ifdef _MB_EXTENDED_CHARSETS_WINDOWS
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int
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_DEFUN (__cp_mbtowc, (r, pwc, s, n, charset, state),
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struct _reent *r _AND
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wchar_t *pwc _AND
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const char *s _AND
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size_t n _AND
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const char *charset _AND
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mbstate_t *state)
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{
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wchar_t dummy;
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unsigned char *t = (unsigned char *)s;
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if (pwc == NULL)
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pwc = &dummy;
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if (s == NULL)
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return 0;
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if (n == 0)
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return -2;
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if (*t >= 0x80)
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{
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int cp_idx = __cp_index (charset + 2);
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if (cp_idx >= 0)
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{
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*pwc = __cp_conv[cp_idx][*t - 0x80];
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if (*pwc == 0) /* Invalid character */
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{
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r->_errno = EILSEQ;
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return -1;
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}
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return 1;
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}
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}
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*pwc = (wchar_t)*t;
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if (*t == '\0')
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return 0;
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return 1;
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}
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#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */
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int
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_DEFUN (__utf8_mbtowc, (r, pwc, s, n, charset, state),
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struct _reent *r _AND
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wchar_t *pwc _AND
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const char *s _AND
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size_t n _AND
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const char *charset _AND
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mbstate_t *state)
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{
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wchar_t dummy;
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unsigned char *t = (unsigned char *)s;
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int ch;
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int i = 0;
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if (pwc == NULL)
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pwc = &dummy;
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if (s == NULL)
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return 0;
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if (n == 0)
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return -2;
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if (state->__count == 0)
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ch = t[i++];
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else
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ch = state->__value.__wchb[0];
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if (ch == '\0')
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{
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*pwc = 0;
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state->__count = 0;
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return 0; /* s points to the null character */
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}
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if (ch <= 0x7f)
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{
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/* single-byte sequence */
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state->__count = 0;
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*pwc = ch;
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return 1;
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}
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if (ch >= 0xc0 && ch <= 0xdf)
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{
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/* two-byte sequence */
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state->__value.__wchb[0] = ch;
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if (state->__count == 0)
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state->__count = 1;
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else if (n < (size_t)-1)
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++n;
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if (n < 2)
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return -2;
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ch = t[i++];
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if (ch < 0x80 || ch > 0xbf)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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if (state->__value.__wchb[0] < 0xc2)
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{
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/* overlong UTF-8 sequence */
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r->_errno = EILSEQ;
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return -1;
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}
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state->__count = 0;
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*pwc = (wchar_t)((state->__value.__wchb[0] & 0x1f) << 6)
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| (wchar_t)(ch & 0x3f);
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return i;
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}
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if (ch >= 0xe0 && ch <= 0xef)
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{
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/* three-byte sequence */
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wchar_t tmp;
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state->__value.__wchb[0] = ch;
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if (state->__count == 0)
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state->__count = 1;
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else if (n < (size_t)-1)
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++n;
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if (n < 2)
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return -2;
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ch = (state->__count == 1) ? t[i++] : state->__value.__wchb[1];
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if (state->__value.__wchb[0] == 0xe0 && ch < 0xa0)
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{
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/* overlong UTF-8 sequence */
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r->_errno = EILSEQ;
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return -1;
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}
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if (ch < 0x80 || ch > 0xbf)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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state->__value.__wchb[1] = ch;
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if (state->__count == 1)
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state->__count = 2;
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else if (n < (size_t)-1)
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++n;
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if (n < 3)
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return -2;
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ch = t[i++];
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if (ch < 0x80 || ch > 0xbf)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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state->__count = 0;
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tmp = (wchar_t)((state->__value.__wchb[0] & 0x0f) << 12)
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| (wchar_t)((state->__value.__wchb[1] & 0x3f) << 6)
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| (wchar_t)(ch & 0x3f);
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*pwc = tmp;
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return i;
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}
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if (ch >= 0xf0 && ch <= 0xf4)
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{
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/* four-byte sequence */
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wint_t tmp;
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state->__value.__wchb[0] = ch;
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if (state->__count == 0)
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state->__count = 1;
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else if (n < (size_t)-1)
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++n;
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if (n < 2)
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return -2;
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ch = (state->__count == 1) ? t[i++] : state->__value.__wchb[1];
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if ((state->__value.__wchb[0] == 0xf0 && ch < 0x90)
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|| (state->__value.__wchb[0] == 0xf4 && ch >= 0x90))
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{
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/* overlong UTF-8 sequence or result is > 0x10ffff */
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r->_errno = EILSEQ;
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return -1;
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}
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if (ch < 0x80 || ch > 0xbf)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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state->__value.__wchb[1] = ch;
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if (state->__count == 1)
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state->__count = 2;
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else if (n < (size_t)-1)
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++n;
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if (n < 3)
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return -2;
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ch = (state->__count == 2) ? t[i++] : state->__value.__wchb[2];
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if (ch < 0x80 || ch > 0xbf)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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state->__value.__wchb[2] = ch;
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if (state->__count == 2)
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state->__count = 3;
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else if (n < (size_t)-1)
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++n;
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if (state->__count == 3 && sizeof(wchar_t) == 2)
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{
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/* On systems which have wchar_t being UTF-16 values, the value
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doesn't fit into a single wchar_t in this case. So what we
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do here is to store the state with a special value of __count
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and return the first half of a surrogate pair. The first
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three bytes of a UTF-8 sequence are enough to generate the
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first half of a UTF-16 surrogate pair. As return value we
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choose to return the number of bytes actually read up to
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here.
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The second half of the surrogate pair is returned in case we
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recognize the special __count value of four, and the next
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byte is actually a valid value. See below. */
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|
tmp = (wint_t)((state->__value.__wchb[0] & 0x07) << 18)
|
||
|
|
| (wint_t)((state->__value.__wchb[1] & 0x3f) << 12)
|
||
|
|
| (wint_t)((state->__value.__wchb[2] & 0x3f) << 6);
|
||
|
|
state->__count = 4;
|
||
|
|
*pwc = 0xd800 | ((tmp - 0x10000) >> 10);
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
if (n < 4)
|
||
|
|
return -2;
|
||
|
|
ch = t[i++];
|
||
|
|
if (ch < 0x80 || ch > 0xbf)
|
||
|
|
{
|
||
|
|
r->_errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
tmp = (wint_t)((state->__value.__wchb[0] & 0x07) << 18)
|
||
|
|
| (wint_t)((state->__value.__wchb[1] & 0x3f) << 12)
|
||
|
|
| (wint_t)((state->__value.__wchb[2] & 0x3f) << 6)
|
||
|
|
| (wint_t)(ch & 0x3f);
|
||
|
|
if (state->__count == 4 && sizeof(wchar_t) == 2)
|
||
|
|
/* Create the second half of the surrogate pair for systems with
|
||
|
|
wchar_t == UTF-16 . */
|
||
|
|
*pwc = 0xdc00 | (tmp & 0x3ff);
|
||
|
|
else
|
||
|
|
*pwc = tmp;
|
||
|
|
state->__count = 0;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
r->_errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Cygwin defines its own doublebyte charset conversion functions
|
||
|
|
because the underlying OS requires wchar_t == UTF-16. */
|
||
|
|
#ifndef __CYGWIN__
|
||
|
|
int
|
||
|
|
_DEFUN (__sjis_mbtowc, (r, pwc, s, n, charset, state),
|
||
|
|
struct _reent *r _AND
|
||
|
|
wchar_t *pwc _AND
|
||
|
|
const char *s _AND
|
||
|
|
size_t n _AND
|
||
|
|
const char *charset _AND
|
||
|
|
mbstate_t *state)
|
||
|
|
{
|
||
|
|
wchar_t dummy;
|
||
|
|
unsigned char *t = (unsigned char *)s;
|
||
|
|
int ch;
|
||
|
|
int i = 0;
|
||
|
|
|
||
|
|
if (pwc == NULL)
|
||
|
|
pwc = &dummy;
|
||
|
|
|
||
|
|
if (s == NULL)
|
||
|
|
return 0; /* not state-dependent */
|
||
|
|
|
||
|
|
if (n == 0)
|
||
|
|
return -2;
|
||
|
|
|
||
|
|
ch = t[i++];
|
||
|
|
if (state->__count == 0)
|
||
|
|
{
|
||
|
|
if (_issjis1 (ch))
|
||
|
|
{
|
||
|
|
state->__value.__wchb[0] = ch;
|
||
|
|
state->__count = 1;
|
||
|
|
if (n <= 1)
|
||
|
|
return -2;
|
||
|
|
ch = t[i++];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (state->__count == 1)
|
||
|
|
{
|
||
|
|
if (_issjis2 (ch))
|
||
|
|
{
|
||
|
|
*pwc = (((wchar_t)state->__value.__wchb[0]) << 8) + (wchar_t)ch;
|
||
|
|
state->__count = 0;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
r->_errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*pwc = (wchar_t)*t;
|
||
|
|
|
||
|
|
if (*t == '\0')
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN (__eucjp_mbtowc, (r, pwc, s, n, charset, state),
|
||
|
|
struct _reent *r _AND
|
||
|
|
wchar_t *pwc _AND
|
||
|
|
const char *s _AND
|
||
|
|
size_t n _AND
|
||
|
|
const char *charset _AND
|
||
|
|
mbstate_t *state)
|
||
|
|
{
|
||
|
|
wchar_t dummy;
|
||
|
|
unsigned char *t = (unsigned char *)s;
|
||
|
|
int ch;
|
||
|
|
int i = 0;
|
||
|
|
|
||
|
|
if (pwc == NULL)
|
||
|
|
pwc = &dummy;
|
||
|
|
|
||
|
|
if (s == NULL)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (n == 0)
|
||
|
|
return -2;
|
||
|
|
|
||
|
|
ch = t[i++];
|
||
|
|
if (state->__count == 0)
|
||
|
|
{
|
||
|
|
if (_iseucjp1 (ch))
|
||
|
|
{
|
||
|
|
state->__value.__wchb[0] = ch;
|
||
|
|
state->__count = 1;
|
||
|
|
if (n <= 1)
|
||
|
|
return -2;
|
||
|
|
ch = t[i++];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (state->__count == 1)
|
||
|
|
{
|
||
|
|
if (_iseucjp2 (ch))
|
||
|
|
{
|
||
|
|
if (state->__value.__wchb[0] == 0x8f)
|
||
|
|
{
|
||
|
|
state->__value.__wchb[1] = ch;
|
||
|
|
state->__count = 2;
|
||
|
|
if (n <= i)
|
||
|
|
return -2;
|
||
|
|
ch = t[i++];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
*pwc = (((wchar_t)state->__value.__wchb[0]) << 8) + (wchar_t)ch;
|
||
|
|
state->__count = 0;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
r->_errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (state->__count == 2)
|
||
|
|
{
|
||
|
|
if (_iseucjp2 (ch))
|
||
|
|
{
|
||
|
|
*pwc = (((wchar_t)state->__value.__wchb[1]) << 8)
|
||
|
|
+ (wchar_t)(ch & 0x7f);
|
||
|
|
state->__count = 0;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
r->_errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*pwc = (wchar_t)*t;
|
||
|
|
|
||
|
|
if (*t == '\0')
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN (__jis_mbtowc, (r, pwc, s, n, charset, state),
|
||
|
|
struct _reent *r _AND
|
||
|
|
wchar_t *pwc _AND
|
||
|
|
const char *s _AND
|
||
|
|
size_t n _AND
|
||
|
|
const char *charset _AND
|
||
|
|
mbstate_t *state)
|
||
|
|
{
|
||
|
|
wchar_t dummy;
|
||
|
|
unsigned char *t = (unsigned char *)s;
|
||
|
|
JIS_STATE curr_state;
|
||
|
|
JIS_ACTION action;
|
||
|
|
JIS_CHAR_TYPE ch;
|
||
|
|
unsigned char *ptr;
|
||
|
|
unsigned int i;
|
||
|
|
int curr_ch;
|
||
|
|
|
||
|
|
if (pwc == NULL)
|
||
|
|
pwc = &dummy;
|
||
|
|
|
||
|
|
if (s == NULL)
|
||
|
|
{
|
||
|
|
state->__state = ASCII;
|
||
|
|
return 1; /* state-dependent */
|
||
|
|
}
|
||
|
|
|
||
|
|
if (n == 0)
|
||
|
|
return -2;
|
||
|
|
|
||
|
|
curr_state = state->__state;
|
||
|
|
ptr = t;
|
||
|
|
|
||
|
|
for (i = 0; i < 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->__state = ASCII;
|
||
|
|
*pwc = (wchar_t)0;
|
||
|
|
return 0;
|
||
|
|
case COPY_A:
|
||
|
|
state->__state = ASCII;
|
||
|
|
*pwc = (wchar_t)*ptr;
|
||
|
|
return (i + 1);
|
||
|
|
case COPY_J1:
|
||
|
|
state->__value.__wchb[0] = t[i];
|
||
|
|
break;
|
||
|
|
case COPY_J2:
|
||
|
|
state->__state = JIS;
|
||
|
|
*pwc = (((wchar_t)state->__value.__wchb[0]) << 8) + (wchar_t)(t[i]);
|
||
|
|
return (i + 1);
|
||
|
|
case MAKE_A:
|
||
|
|
ptr = (unsigned char *)(t + i + 1);
|
||
|
|
break;
|
||
|
|
case ERROR:
|
||
|
|
default:
|
||
|
|
r->_errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
state->__state = curr_state;
|
||
|
|
return -2; /* n < bytes needed */
|
||
|
|
}
|
||
|
|
#endif /* !__CYGWIN__*/
|
||
|
|
#endif /* _MB_CAPABLE */
|