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evil-qemacs/charset.c
Charlie Gordon 7037156cf6 fix charset bugs, caused infinite loop in usc4
2014-01-11 18:58:08 +00:00

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/*
* Basic Charset functions for QEmacs
*
* Copyright (c) 2000-2002 Fabrice Bellard.
* Copyright (c) 2002-2014 Charlie Gordon.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "qe.h"
QECharset *first_charset;
/* Unicode utilities */
/* Compute tty width of unicode characters. This is a modified
* implementation of wcwidth() from Markus Kuhn. We do not handle non
* spacing and enclosing combining characters and control chars.
*/
static unsigned int const unicode_glyph_ranges[] = {
0x10FF, 1, 0x115f, 2, /* 0: Hangul Jamo */
0x2328, 1, 0x232a, 2, /* 2: wide Angle brackets */
0x2E7F, 1, 0x2efd, 2, /* 4: CJK Radicals */
0x2EFF, 1, 0x303e, 2, /* 6: Kangxi Radicals */
0x303F, 1, 0x4dbf, 2, /* 8: CJK */
0x4DFF, 1, 0xa4cf, 2, /* 10: CJK */
0xABFF, 1, 0xd7a3, 2, /* 12: Hangul Syllables */
0xF8FF, 1, 0xfaff, 2, /* 14: CJK Compatibility Ideographs */
0xFDFF, 1, 0xFE1F, 2, /* 16: */
0xFE2F, 1, 0xfe6f, 2, /* 18: CJK Compatibility Forms */
0xFEFF, 1, 0xff5f, 2, /* 20: Fullwidth Forms */
0xFFDF, 1, 0xffe6, 2, /* 22: */
0x1FFFF, 1, 0x3fffd, 2, /* 24: CJK Compatibility */
UINT_MAX, 1, /* 26: catchall */
};
static unsigned int const unicode_glyph_range_index[16] = {
2 * 0, /* 0000-0FFF */
2 * 0, /* 1000-1FFF */
2 * 2, /* 2000-2FFF */
2 * 7, /* 3000-3FFF */
2 * 9, /* 4000-4FFF */
2 * 11, /* 5000-5FFF */
2 * 11, /* 6000-6FFF */
2 * 11, /* 7000-7FFF */
2 * 11, /* 8000-8FFF */
2 * 11, /* 9000-9FFF */
2 * 11, /* A000-AFFF */
2 * 13, /* B000-BFFF */
2 * 13, /* C000-CFFF */
2 * 13, /* D000-DFFF */
2 * 14, /* E000-EFFF */
2 * 14, /* F000-FFFF */
};
int unicode_glyph_tty_width(unsigned int ucs)
{
unsigned int const *ip;
/* Iterative lookup with fast initial jump, no boundary test needed */
ip = unicode_glyph_ranges + unicode_glyph_range_index[(ucs >> 12) & 0xF];
while (ucs > ip[0]) {
ip += 2;
}
return ip[1];
}
/* utf-8 specific tables */
static unsigned short table_idem[256];
static unsigned short table_utf8[256];
static unsigned short table_none[256];
unsigned char utf8_length[256];
static const unsigned int utf8_min_code[7] = {
0, 0, 0x80, 0x800, 0x10000, 0x00200000, 0x04000000,
};
static const unsigned char utf8_first_code_mask[7] = {
0, 0, 0x1f, 0xf, 0x7, 0x3, 0x1,
};
/********************************************************/
/* 8859-1 */
static void decode_8859_1_init(CharsetDecodeState *s)
{
s->table = table_idem;
}
static u8 *encode_8859_1(__unused__ QECharset *charset, u8 *p, int c)
{
if (c <= 0xff) {
*p++ = c;
return p;
} else {
return NULL;
}
}
QECharset charset_8859_1 = {
"8859-1",
"ISO-8859-1|iso-ir-100|latin1|l1|819",
decode_8859_1_init,
decode_8bit,
encode_8859_1,
charset_get_pos_8bit,
charset_get_chars_8bit,
charset_goto_char_8bit,
charset_goto_line_8bit,
1, 0, 0, 10, 0, 0, NULL, NULL,
};
/********************************************************/
/* vt100 */
static void decode_vt100_init(CharsetDecodeState *s)
{
s->table = table_idem;
}
static u8 *encode_vt100(__unused__ QECharset *charset, u8 *p, int c)
{
if (c <= 0xff) {
*p++ = c;
return p;
} else {
return NULL;
}
}
QECharset charset_vt100 = {
"vt100",
NULL,
decode_vt100_init,
decode_8bit,
encode_vt100,
charset_get_pos_8bit,
charset_get_chars_8bit,
charset_goto_char_8bit,
charset_goto_line_8bit,
1, 0, 0, 10, 0, 0, NULL, NULL,
};
/********************************************************/
/* 7 bit */
static u8 *encode_7bit(__unused__ QECharset *charset, u8 *p, int c)
{
if (c <= 0x7f) {
*p++ = c;
return p;
} else {
return NULL;
}
}
static QECharset charset_7bit = {
"7bit",
"us-ascii|ascii|7-bit|iso-ir-6|ANSI_X3.4|646",
decode_8859_1_init,
decode_8bit,
encode_7bit,
charset_get_pos_8bit,
charset_get_chars_8bit,
charset_goto_char_8bit,
charset_goto_line_8bit,
1, 0, 0, 10, 0, 0, NULL, NULL,
};
/********************************************************/
/* UTF8 */
/* return the utf8 char and increment 'p' of at least one char. strict
decoding is done (refuse non canonical UTF8) */
int utf8_decode(const char **pp)
{
unsigned int c, c1;
const u8 *p;
int i, l;
p = *(const u8 **)pp;
c = *p++;
if (c < 128) {
/* fast case for ASCII */
} else {
l = utf8_length[c];
if (l == 1)
goto fail; /* can only be multi byte code here */
c = c & utf8_first_code_mask[l];
for (i = 1; i < l; i++) {
c1 = *p;
if (c1 < 0x80 || c1 >= 0xc0)
goto fail;
p++;
c = (c << 6) | (c1 & 0x3f);
}
if (c < utf8_min_code[l])
goto fail;
/* exclude surrogate pairs and special codes */
if ((c >= 0xd800 && c <= 0xdfff) ||
c == 0xfffe || c == 0xffff)
goto fail;
}
*(const u8 **)pp = p;
return c;
fail:
*(const u8 **)pp = p;
return INVALID_CHAR;
}
/* NOTE: the buffer must be at least 6 bytes long. Return number of
* bytes copied. */
int utf8_encode(char *q0, int c)
{
char *q = q0;
if (c < 0x80) {
*q++ = c;
} else {
if (c < 0x800) {
*q++ = (c >> 6) | 0xc0;
} else {
if (c < 0x10000) {
*q++ = (c >> 12) | 0xe0;
} else {
if (c < 0x00200000) {
*q++ = (c >> 18) | 0xf0;
} else {
if (c < 0x04000000) {
*q++ = (c >> 24) | 0xf8;
} else {
*q++ = (c >> 30) | 0xfc;
*q++ = ((c >> 24) & 0x3f) | 0x80;
}
*q++ = ((c >> 18) & 0x3f) | 0x80;
}
*q++ = ((c >> 12) & 0x3f) | 0x80;
}
*q++ = ((c >> 6) & 0x3f) | 0x80;
}
*q++ = (c & 0x3f) | 0x80;
}
return q - q0;
}
int utf8_to_unicode(unsigned int *dest, int dest_length, const char *str)
{
const char *p;
unsigned int *uq, *uq_end, c;
if (dest_length <= 0)
return 0;
p = str;
uq = dest;
uq_end = dest + dest_length - 1;
for (;;) {
if (uq >= uq_end)
break;
c = utf8_decode(&p);
if (c == '\0')
break;
*uq++ = c;
}
*uq = 0;
return uq - dest;
}
static void decode_utf8_init(CharsetDecodeState *s)
{
s->table = table_utf8;
}
static int decode_utf8_func(CharsetDecodeState *s)
{
return utf8_decode((const char **)(void *)&s->p);
}
static u8 *encode_utf8(__unused__ QECharset *charset, u8 *q, int c)
{
return q + utf8_encode((char*)q, c);
}
/* return the number of lines and column position for a buffer */
static void charset_get_pos_utf8(CharsetDecodeState *s, const u8 *buf, int size,
int *line_ptr, int *col_ptr)
{
const u8 *p, *p1, *lp;
int nl, line, col;
QASSERT(size >= 0);
line = 0;
lp = p = buf;
p1 = p + size;
nl = s->charset->eol_char;
for (;;) {
p = memchr(p, nl, p1 - p);
if (!p)
break;
p++;
lp = p;
line++;
}
/* now compute number of chars (XXX: potential problem if out of
* block, but for UTF8 it works) */
col = 0;
while (lp < p1) {
col++;
lp += utf8_length[*lp];
}
*line_ptr = line;
*col_ptr = col;
}
static int charset_get_chars_utf8(QECharset *charset, const u8 *buf, int size)
{
int nb_chars, c;
const u8 *buf_end, *buf_ptr;
nb_chars = 0;
buf_ptr = buf;
buf_end = buf + size;
while (buf_ptr < buf_end) {
c = *buf_ptr++;
if (c < 0x80 || c >= 0xc0)
nb_chars++;
}
/* CG: nb_chars is the number of character boundaries, trailing
* utf-8 sequence at start of buffer is ignored in count while
* incomplete utf-8 sequence at end of buffer is counted. This may
* cause problems when counting characters with eb_get_pos with an
* offset falling indside an utf-8 sequence.
*/
return nb_chars;
}
static int charset_goto_char_utf8(QECharset *charset, const u8 *buf, int size, int pos)
{
int nb_chars, c;
const u8 *buf_ptr, *buf_end;
nb_chars = 0;
buf_ptr = buf;
buf_end = buf + size;
while (buf_ptr < buf_end) {
c = *buf_ptr;
if (c < 0x80 || c >= 0xc0) {
/* Test done here to skip initial trailing bytes if any */
if (nb_chars >= pos)
break;
nb_chars++;
}
buf_ptr++;
}
return buf_ptr - buf;
}
QECharset charset_utf8 = {
"utf-8",
"utf8",
decode_utf8_init,
decode_utf8_func,
encode_utf8,
charset_get_pos_utf8,
charset_get_chars_utf8,
charset_goto_char_utf8,
charset_goto_line_8bit,
1, 1, 0, 10, 0, 0, NULL, NULL,
};
/********************************************************/
/* UCS2/UCS4 */
static void decode_ucs_init(CharsetDecodeState *s)
{
s->table = table_none;
}
static int decode_ucs2le(CharsetDecodeState *s)
{
const u8 *p;
p = s->p;
s->p += 2;
return p[0] + (p[1] << 8);
}
static u8 *encode_ucs2le(__unused__ QECharset *charset, u8 *p, int c)
{
p[0] = c;
p[1] = c >> 8;
return p + 2;
}
/* return the number of lines and column position for a buffer */
static void charset_get_pos_ucs2(CharsetDecodeState *s, const u8 *buf, int size,
int *line_ptr, int *col_ptr)
{
const uint16_t *p, *p1, *lp;
uint16_t nl;
union { uint16_t n; char c[2]; } u;
int line, col;
line = 0;
lp = p = (const uint16_t *)buf;
p1 = p + (size >> 1);
u.n = 0;
u.c[s->charset == &charset_ucs2be] = s->charset->eol_char;
nl = u.n;
while (p < p1) {
if (*p++ == nl) {
lp = p;
line++;
}
}
col = p1 - lp;
*line_ptr = line;
*col_ptr = col;
}
static int charset_goto_line_ucs2(QECharset *charset, const u8 *buf, int size,
int nlines)
{
const uint16_t *p, *p1, *lp;
uint16_t nl;
union { uint16_t n; char c[2]; } u;
lp = p = (const uint16_t *)buf;
p1 = p + (size >> 1);
u.n = 0;
u.c[charset == &charset_ucs2be] = charset->eol_char;
nl = u.n;
while (nlines > 0 && p < p1) {
while (p < p1) {
if (*p++ == nl) {
lp = p;
nlines--;
break;
}
}
}
return (const u8 *)lp - buf;
}
static int decode_ucs2be(CharsetDecodeState *s)
{
const u8 *p;
p = s->p;
s->p += 2;
return (p[0] << 8) + p[1];
}
static u8 *encode_ucs2be(__unused__ QECharset *charset, u8 *p, int c)
{
p[0] = c >> 8;
p[1] = c;
return p + 2;
}
static int charset_get_chars_ucs2(__unused__ QECharset *charset, const u8 *buf, int size)
{
return size >> 1;
}
static int charset_goto_char_ucs2(__unused__ QECharset *charset, const u8 *buf, int size, int pos)
{
return min(pos << 1, size);
}
QECharset charset_ucs2le = {
"ucs2le",
"utf16le|utf-16le",
decode_ucs_init,
decode_ucs2le,
encode_ucs2le,
charset_get_pos_ucs2,
charset_get_chars_ucs2,
charset_goto_char_ucs2,
charset_goto_line_ucs2,
2, 0, 0, 10, 0, 0, NULL, NULL,
};
QECharset charset_ucs2be = {
"ucs2be",
"ucs2|utf16|utf-16|utf16be|utf-16be",
decode_ucs_init,
decode_ucs2be,
encode_ucs2be,
charset_get_pos_ucs2,
charset_get_chars_ucs2,
charset_goto_char_ucs2,
charset_goto_line_ucs2,
2, 0, 0, 10, 0, 0, NULL, NULL,
};
static int decode_ucs4le(CharsetDecodeState *s)
{
const u8 *p;
p = s->p;
s->p += 4;
return p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24);
}
static u8 *encode_ucs4le(__unused__ QECharset *charset, u8 *p, int c)
{
p[0] = c;
p[1] = c >> 8;
p[2] = c >> 16;
p[3] = c >> 24;
return p + 4;
}
/* return the number of lines and column position for a buffer */
static void charset_get_pos_ucs4(CharsetDecodeState *s, const u8 *buf, int size,
int *line_ptr, int *col_ptr)
{
const uint32_t *p, *p1, *lp;
uint32_t nl;
union { uint32_t n; char c[4]; } u;
int line, col;
line = 0;
lp = p = (const uint32_t *)buf;
p1 = p + (size >> 2);
u.n = 0;
u.c[(s->charset == &charset_ucs4be) * 3] = s->charset->eol_char;
nl = u.n;
while (p < p1) {
if (*p++ == nl) {
lp = p;
line++;
}
}
col = p1 - lp;
*line_ptr = line;
*col_ptr = col;
}
static int charset_goto_line_ucs4(QECharset *charset, const u8 *buf, int size,
int nlines)
{
const uint32_t *p, *p1, *lp;
uint32_t nl;
union { uint32_t n; char c[4]; } u;
lp = p = (const uint32_t *)buf;
p1 = p + (size >> 2);
u.n = 0;
u.c[(charset == &charset_ucs4be) * 3] = charset->eol_char;
nl = u.n;
while (nlines > 0 && p < p1) {
while (p < p1) {
if (*p++ == nl) {
lp = p;
nlines--;
break;
}
}
}
return (const u8 *)lp - buf;
}
static int decode_ucs4be(CharsetDecodeState *s)
{
const u8 *p;
p = s->p;
s->p += 4;
return (p[0] << 24) + (p[1] << 16) + (p[2] << 8) + p[3];
}
static u8 *encode_ucs4be(__unused__ QECharset *charset, u8 *p, int c)
{
p[0] = c >> 24;
p[1] = c >> 16;
p[2] = c >> 8;
p[3] = c;
return p + 4;
}
static int charset_get_chars_ucs4(__unused__ QECharset *charset, const u8 *buf, int size)
{
return size >> 2;
}
static int charset_goto_char_ucs4(__unused__ QECharset *charset, const u8 *buf, int size, int pos)
{
return min(pos << 2, size);
}
QECharset charset_ucs4le = {
"ucs4le",
"utf32le|utf-32le",
decode_ucs_init,
decode_ucs4le,
encode_ucs4le,
charset_get_pos_ucs4,
charset_get_chars_ucs4,
charset_goto_char_ucs4,
charset_goto_line_ucs4,
4, 0, 0, 10, 0, 0, NULL, NULL,
};
QECharset charset_ucs4be = {
"ucs4be",
"ucs4|utf32|utf-32|utf32be|utf-32be",
decode_ucs_init,
decode_ucs4be,
encode_ucs4be,
charset_get_pos_ucs4,
charset_get_chars_ucs4,
charset_goto_char_ucs4,
charset_goto_line_ucs4,
4, 0, 0, 10, 0, 0, NULL, NULL,
};
/********************************************************/
/* generic charset functions */
void qe_register_charset(QECharset *charset)
{
QECharset **pp;
if (!charset->aliases)
charset->aliases = "";
pp = &first_charset;
while (*pp != NULL) {
if (*pp == charset)
return;
pp = &(*pp)->next;
}
*pp = charset;
}
void charset_completion(CompleteState *cp)
{
QECharset *charset;
char name[32];
const char *p, *q;
for (charset = first_charset; charset != NULL; charset = charset->next) {
if (strxstart(charset->name, cp->current, NULL))
add_string(&cp->cs, charset->name);
if (charset->aliases) {
for (q = p = charset->aliases;; q++) {
if (*q == '\0' || *q == '|') {
if (q > p) {
pstrncpy(name, sizeof(name), p, q - p);
if (strxstart(name, cp->current, NULL))
add_string(&cp->cs, name);
}
if (*q == '\0')
break;
p = q + 1;
}
}
}
}
}
QECharset *find_charset(const char *name)
{
QECharset *charset;
if (!name)
return NULL;
for (charset = first_charset; charset != NULL; charset = charset->next) {
if (!strxcmp(charset->name, name)
|| strxfind(charset->aliases, name)) {
return charset;
}
}
return NULL;
}
void charset_decode_init(CharsetDecodeState *s, QECharset *charset)
{
s->table = NULL; /* fail safe */
if (charset->table_alloc) {
s->table = qe_malloc_array(unsigned short, 256);
if (!s->table) {
charset = &charset_8859_1;
}
}
s->charset = charset;
s->char_size = charset->char_size;
s->decode_func = charset->decode_func;
s->get_pos_func = charset->get_pos_func;
if (charset->decode_init)
charset->decode_init(s);
}
void charset_decode_close(CharsetDecodeState *s)
{
if (s->charset->table_alloc)
qe_free(&s->table);
/* safety */
memset(s, 0, sizeof(CharsetDecodeState));
}
/* detect the charset. Actually only UTF8 is detected */
QECharset *detect_charset(const u8 *buf, int size)
{
int i, l, c, has_utf8;
has_utf8 = 0;
for (i = 0; i < size;) {
c = buf[i++];
if ((c >= 0x80 && c < 0xc0) || c >= 0xfe)
goto no_utf8;
l = utf8_length[c];
while (l > 1) {
has_utf8 = 1;
if (i >= size)
break;
c = buf[i++];
if (!(c >= 0x80 && c < 0xc0)) {
no_utf8:
has_utf8 = 0;
break;
}
l--;
}
}
if (has_utf8)
return &charset_utf8;
/* Check for zwnbsp BOM: files starting with zero-width
* no-break space as a byte-order mark (BOM) will be detected
* as ucs2 or ucs4 encoded.
*/
if (size >= 2 && buf[0] == 0xff && buf[1] == 0xfe) {
if (size >= 4 && buf[2] == 0 && buf[3] == 0)
return &charset_ucs4le;
return &charset_ucs2le;
}
if (size >= 2 && buf[0] == 0xfe && buf[1] == 0xff)
return &charset_ucs2be;
if (size >= 4
&& buf[0] == 0 && buf[1] == 0 && buf[2] == 0xfe && buf[3] == 0xff) {
return &charset_ucs4be;
}
#if 0
{
/* Need a more reliable generic ucs2/ucs4 detection */
int maxc[4];
maxc[0] = maxc[1] = maxc[2] = maxc[3] = 0;
for (i = 0; i < size; i += 2) {
if (buf[i] > maxc[i & 3])
maxc[i & 3] = buf[i];
}
if (maxc[0] > 'a' && maxc[1] < 0x2f && maxc[2] > 'a' && maxc[3] < 0x2f)
return &charset_ucs2le;
if (maxc[1] > 'a' && maxc[0] < 0x2f && maxc[3] > 'a' && maxc[2] < 0x2f)
return &charset_ucs2be;
}
#endif
/* Should detect iso-2220-jp upon \033$@ and \033$B, but jis
* support is not selected in tiny build
*/
/* CG: should use a state variable for default charset */
return &charset_8859_1;
}
/* the function uses '?' to indicate that no match could be found in
current charset */
int unicode_to_charset(char *buf, unsigned int c, QECharset *charset)
{
char *q;
q = (char *)charset->encode_func(charset, (u8 *)buf, c);
if (!q) {
q = buf;
*q++ = '?';
}
*q = '\0';
return q - buf;
}
/********************************************************/
/* 8 bit charsets */
void decode_8bit_init(CharsetDecodeState *s)
{
QECharset *charset = s->charset;
unsigned short *table;
int i, n;
table = s->table;
for (i = 0; i < charset->min_char; i++)
*table++ = i;
n = charset->max_char - charset->min_char + 1;
for (i = 0; i < n; i++)
*table++ = charset->private_table[i];
for (i = charset->max_char + 1; i < 256; i++)
*table++ = i;
}
int decode_8bit(CharsetDecodeState *s)
{
return s->table[*(s->p)++];
}
/* not very fast, but not critical yet */
u8 *encode_8bit(QECharset *charset, u8 *q, int c)
{
int i, n;
const unsigned short *table;
if (c < charset->min_char) {
/* nothing to do */
} else
if (c > charset->max_char && c <= 0xff) {
/* nothing to do */
} else {
n = charset->max_char - charset->min_char + 1;
table = charset->private_table;
for (i = 0; i < n; i++) {
if (table[i] == c)
goto found;
}
return NULL;
found:
c = charset->min_char + i;
}
*q++ = c;
return q;
}
/* return the number of lines and column position for a buffer */
void charset_get_pos_8bit(CharsetDecodeState *s, const u8 *buf, int size,
int *line_ptr, int *col_ptr)
{
const u8 *p, *p1, *lp;
int nl, line, col;
QASSERT(size >= 0);
line = 0;
lp = p = buf;
p1 = p + size;
nl = s->charset->eol_char;
for (;;) {
p = memchr(p, nl, p1 - p);
if (!p)
break;
p++;
lp = p;
line++;
}
col = p1 - lp;
*line_ptr = line;
*col_ptr = col;
}
int charset_goto_line_8bit(QECharset *charset, const u8 *buf, int size, int nlines)
{
const u8 *p, *p1, *lp;
int nl;
lp = p = buf;
p1 = p + size;
nl = charset->eol_char;
while (nlines > 0) {
p = memchr(p, nl, p1 - p);
if (!p)
break;
p++;
lp = p;
nlines--;
}
return lp - buf;
}
int charset_get_chars_8bit(QECharset *charset, const u8 *buf, int size)
{
return size;
}
int charset_goto_char_8bit(QECharset *charset, const u8 *buf, int size, int pos)
{
return min(pos, size);
}
/********************************************************/
void charset_init(void)
{
int l, i, n;
for (i = 0; i < 256; i++) {
table_idem[i] = i;
table_none[i] = ESCAPE_CHAR;
}
/* utf8 tables */
// could set utf8_length[128...0xc0] to 0 as invalid bytes
memset(utf8_length, 1, 256);
i = 0xc0;
l = 2;
while (l <= 6) {
n = utf8_first_code_mask[l] + 1;
while (n > 0) {
utf8_length[i++] = l;
n--;
}
l++;
}
for (i = 0; i < 256; i++)
table_utf8[i] = INVALID_CHAR;
for (i = 0; i < 0x80; i++)
table_utf8[i] = i;
for (i = 0xc0; i < 0xfe; i++)
table_utf8[i] = ESCAPE_CHAR;
qe_register_charset(&charset_8859_1);
qe_register_charset(&charset_vt100);
qe_register_charset(&charset_7bit);
qe_register_charset(&charset_utf8);
qe_register_charset(&charset_ucs2le);
qe_register_charset(&charset_ucs2be);
qe_register_charset(&charset_ucs4le);
qe_register_charset(&charset_ucs4be);
}
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