0,0 → 1,646 |
#include <newlib.h> |
#include <stdlib.h> |
#include <locale.h> |
#include "mbctype.h" |
#include <wchar.h> |
#include <string.h> |
#include <errno.h> |
#include "local.h" |
|
int (*__mbtowc) (struct _reent *, wchar_t *, const char *, size_t, |
const char *, mbstate_t *) |
#ifdef __CYGWIN__ |
/* Cygwin starts up in UTF-8 mode. */ |
= __utf8_mbtowc; |
#else |
= __ascii_mbtowc; |
#endif |
|
int |
_DEFUN (_mbtowc_r, (r, pwc, s, n, state), |
struct _reent *r _AND |
wchar_t *pwc _AND |
const char *s _AND |
size_t n _AND |
mbstate_t *state) |
{ |
return __mbtowc (r, pwc, s, n, __locale_charset (), state); |
} |
|
int |
_DEFUN (__ascii_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; |
|
if (pwc == NULL) |
pwc = &dummy; |
|
if (s == NULL) |
return 0; |
|
if (n == 0) |
return -2; |
|
#ifdef __CYGWIN__ |
if ((wchar_t)*t >= 0x80) |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
#endif |
|
*pwc = (wchar_t)*t; |
|
if (*t == '\0') |
return 0; |
|
return 1; |
} |
|
#ifdef _MB_CAPABLE |
typedef enum { ESCAPE, DOLLAR, BRACKET, AT, B, J, |
NUL, JIS_CHAR, OTHER, JIS_C_NUM } JIS_CHAR_TYPE; |
typedef enum { ASCII, JIS, A_ESC, A_ESC_DL, JIS_1, J_ESC, J_ESC_BR, |
INV, JIS_S_NUM } JIS_STATE; |
typedef enum { COPY_A, COPY_J1, COPY_J2, MAKE_A, 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 }, |
/* JIS */ { J_ESC, JIS_1, JIS_1, JIS_1, JIS_1, JIS_1, INV, JIS_1, INV }, |
/* 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_1 */ { INV, JIS, JIS, JIS, JIS, JIS, INV, JIS, INV }, |
/* 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 }, |
}; |
|
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}, |
/* JIS */ { NOOP, COPY_J1, COPY_J1, COPY_J1, COPY_J1, COPY_J1, ERROR, COPY_J1, ERROR }, |
/* 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, NOOP, NOOP, COPY_A, COPY_A, COPY_A, COPY_A}, |
/* JIS_1 */ { ERROR, COPY_J2, COPY_J2, COPY_J2, COPY_J2, COPY_J2, ERROR, COPY_J2, ERROR }, |
/* J_ESC */ { ERROR, ERROR, NOOP, ERROR, ERROR, ERROR, ERROR, ERROR, ERROR }, |
/* J_ESC_BR */{ ERROR, ERROR, ERROR, ERROR, MAKE_A, MAKE_A, ERROR, ERROR, ERROR }, |
}; |
|
/* we override the mbstate_t __count field for more complex encodings and use it store a state value */ |
#define __state __count |
|
#ifdef _MB_EXTENDED_CHARSETS_ISO |
int |
_DEFUN (__iso_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; |
|
if (pwc == NULL) |
pwc = &dummy; |
|
if (s == NULL) |
return 0; |
|
if (n == 0) |
return -2; |
|
if (*t >= 0xa0) |
{ |
int iso_idx = __iso_8859_index (charset + 9); |
if (iso_idx >= 0) |
{ |
*pwc = __iso_8859_conv[iso_idx][*t - 0xa0]; |
if (*pwc == 0) /* Invalid character */ |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
return 1; |
} |
} |
|
*pwc = (wchar_t) *t; |
|
if (*t == '\0') |
return 0; |
|
return 1; |
} |
#endif /* _MB_EXTENDED_CHARSETS_ISO */ |
|
#ifdef _MB_EXTENDED_CHARSETS_WINDOWS |
int |
_DEFUN (__cp_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; |
|
if (pwc == NULL) |
pwc = &dummy; |
|
if (s == NULL) |
return 0; |
|
if (n == 0) |
return -2; |
|
if (*t >= 0x80) |
{ |
int cp_idx = __cp_index (charset + 2); |
if (cp_idx >= 0) |
{ |
*pwc = __cp_conv[cp_idx][*t - 0x80]; |
if (*pwc == 0) /* Invalid character */ |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
return 1; |
} |
} |
|
*pwc = (wchar_t)*t; |
|
if (*t == '\0') |
return 0; |
|
return 1; |
} |
#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */ |
|
int |
_DEFUN (__utf8_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; |
|
if (state->__count == 0) |
ch = t[i++]; |
else |
ch = state->__value.__wchb[0]; |
|
if (ch == '\0') |
{ |
*pwc = 0; |
state->__count = 0; |
return 0; /* s points to the null character */ |
} |
|
if (ch <= 0x7f) |
{ |
/* single-byte sequence */ |
state->__count = 0; |
*pwc = ch; |
return 1; |
} |
if (ch >= 0xc0 && ch <= 0xdf) |
{ |
/* two-byte sequence */ |
state->__value.__wchb[0] = ch; |
if (state->__count == 0) |
state->__count = 1; |
else if (n < (size_t)-1) |
++n; |
if (n < 2) |
return -2; |
ch = t[i++]; |
if (ch < 0x80 || ch > 0xbf) |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
if (state->__value.__wchb[0] < 0xc2) |
{ |
/* overlong UTF-8 sequence */ |
r->_errno = EILSEQ; |
return -1; |
} |
state->__count = 0; |
*pwc = (wchar_t)((state->__value.__wchb[0] & 0x1f) << 6) |
| (wchar_t)(ch & 0x3f); |
return i; |
} |
if (ch >= 0xe0 && ch <= 0xef) |
{ |
/* three-byte sequence */ |
wchar_t tmp; |
state->__value.__wchb[0] = ch; |
if (state->__count == 0) |
state->__count = 1; |
else if (n < (size_t)-1) |
++n; |
if (n < 2) |
return -2; |
ch = (state->__count == 1) ? t[i++] : state->__value.__wchb[1]; |
if (state->__value.__wchb[0] == 0xe0 && ch < 0xa0) |
{ |
/* overlong UTF-8 sequence */ |
r->_errno = EILSEQ; |
return -1; |
} |
if (ch < 0x80 || ch > 0xbf) |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
state->__value.__wchb[1] = ch; |
if (state->__count == 1) |
state->__count = 2; |
else if (n < (size_t)-1) |
++n; |
if (n < 3) |
return -2; |
ch = t[i++]; |
if (ch < 0x80 || ch > 0xbf) |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
state->__count = 0; |
tmp = (wchar_t)((state->__value.__wchb[0] & 0x0f) << 12) |
| (wchar_t)((state->__value.__wchb[1] & 0x3f) << 6) |
| (wchar_t)(ch & 0x3f); |
*pwc = tmp; |
return i; |
} |
if (ch >= 0xf0 && ch <= 0xf4) |
{ |
/* four-byte sequence */ |
wint_t tmp; |
state->__value.__wchb[0] = ch; |
if (state->__count == 0) |
state->__count = 1; |
else if (n < (size_t)-1) |
++n; |
if (n < 2) |
return -2; |
ch = (state->__count == 1) ? t[i++] : state->__value.__wchb[1]; |
if ((state->__value.__wchb[0] == 0xf0 && ch < 0x90) |
|| (state->__value.__wchb[0] == 0xf4 && ch >= 0x90)) |
{ |
/* overlong UTF-8 sequence or result is > 0x10ffff */ |
r->_errno = EILSEQ; |
return -1; |
} |
if (ch < 0x80 || ch > 0xbf) |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
state->__value.__wchb[1] = ch; |
if (state->__count == 1) |
state->__count = 2; |
else if (n < (size_t)-1) |
++n; |
if (n < 3) |
return -2; |
ch = (state->__count == 2) ? t[i++] : state->__value.__wchb[2]; |
if (ch < 0x80 || ch > 0xbf) |
{ |
r->_errno = EILSEQ; |
return -1; |
} |
state->__value.__wchb[2] = ch; |
if (state->__count == 2) |
state->__count = 3; |
else if (n < (size_t)-1) |
++n; |
if (state->__count == 3 && sizeof(wchar_t) == 2) |
{ |
/* On systems which have wchar_t being UTF-16 values, the value |
doesn't fit into a single wchar_t in this case. So what we |
do here is to store the state with a special value of __count |
and return the first half of a surrogate pair. The first |
three bytes of a UTF-8 sequence are enough to generate the |
first half of a UTF-16 surrogate pair. As return value we |
choose to return the number of bytes actually read up to |
here. |
The second half of the surrogate pair is returned in case we |
recognize the special __count value of four, and the next |
byte is actually a valid value. See below. */ |
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 */ |