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grub/normal/charset.c
Vladimir 'phcoder' Serbinenko 6c363dfd54 Fix doublewidth character handling
2010-03-16 21:29:15 +01:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
/* Convert a (possibly null-terminated) UTF-8 string of at most SRCSIZE
bytes (if SRCSIZE is -1, it is ignored) in length to a UTF-16 string.
Return the number of characters converted. DEST must be able to hold
at least DESTSIZE characters. If an invalid sequence is found, return -1.
If SRCEND is not NULL, then *SRCEND is set to the next byte after the
last byte used in SRC. */
#include <grub/charset.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/unicode.h>
#include <grub/term.h>
#include <grub/normal.h>
#ifdef HAVE_UNIFONT_WIDTHSPEC
#include "widthspec.h"
#endif
grub_ssize_t
grub_utf8_to_utf16 (grub_uint16_t *dest, grub_size_t destsize,
const grub_uint8_t *src, grub_size_t srcsize,
const grub_uint8_t **srcend)
{
grub_uint16_t *p = dest;
int count = 0;
grub_uint32_t code = 0;
if (srcend)
*srcend = src;
while (srcsize && destsize)
{
grub_uint32_t c = *src++;
if (srcsize != (grub_size_t)-1)
srcsize--;
if (count)
{
if ((c & GRUB_UINT8_2_LEADINGBITS) != GRUB_UINT8_1_LEADINGBIT)
{
/* invalid */
return -1;
}
else
{
code <<= 6;
code |= (c & GRUB_UINT8_6_TRAILINGBITS);
count--;
}
}
else
{
if (c == 0)
break;
if ((c & GRUB_UINT8_1_LEADINGBIT) == 0)
code = c;
else if ((c & GRUB_UINT8_3_LEADINGBITS) == GRUB_UINT8_2_LEADINGBITS)
{
count = 1;
code = c & GRUB_UINT8_5_TRAILINGBITS;
}
else if ((c & GRUB_UINT8_4_LEADINGBITS) == GRUB_UINT8_3_LEADINGBITS)
{
count = 2;
code = c & GRUB_UINT8_4_TRAILINGBITS;
}
else if ((c & GRUB_UINT8_5_LEADINGBITS) == GRUB_UINT8_4_LEADINGBITS)
{
count = 3;
code = c & GRUB_UINT8_3_TRAILINGBITS;
}
else if ((c & GRUB_UINT8_6_LEADINGBITS) == GRUB_UINT8_5_LEADINGBITS)
{
count = 4;
code = c & GRUB_UINT8_2_TRAILINGBITS;
}
else if ((c & GRUB_UINT8_7_LEADINGBITS) == GRUB_UINT8_6_LEADINGBITS)
{
count = 5;
code = c & GRUB_UINT8_1_TRAILINGBIT;
}
else
return -1;
}
if (count == 0)
{
if (destsize < 2 && code >= GRUB_UCS2_LIMIT)
break;
if (code >= GRUB_UCS2_LIMIT)
{
*p++ = GRUB_UTF16_UPPER_SURROGATE (code);
*p++ = GRUB_UTF16_LOWER_SURROGATE (code);
destsize -= 2;
}
else
{
*p++ = code;
destsize--;
}
}
}
if (srcend)
*srcend = src;
return p - dest;
}
/* Convert UCS-4 to UTF-8. */
void
grub_ucs4_to_utf8 (grub_uint32_t *src, grub_size_t size,
grub_uint8_t *dest, grub_size_t destsize)
{
/* Keep last char for \0. */
grub_uint8_t *destend = dest + destsize - 1;
while (size-- && dest < destend)
{
grub_uint32_t code = *src++;
if (code <= 0x007F)
*dest++ = code;
else if (code <= 0x07FF)
{
if (dest + 1 >= destend)
break;
*dest++ = (code >> 6) | 0xC0;
*dest++ = (code & 0x3F) | 0x80;
}
else if ((code >= 0xDC00 && code <= 0xDFFF)
|| (code >= 0xD800 && code <= 0xDBFF))
{
/* No surrogates in UCS-4... */
*dest++ = '?';
}
else
{
if (dest + 2 >= destend)
break;
*dest++ = (code >> 12) | 0xE0;
*dest++ = ((code >> 6) & 0x3F) | 0x80;
*dest++ = (code & 0x3F) | 0x80;
}
}
*dest = 0;
}
/* Convert UCS-4 to UTF-8. */
char *
grub_ucs4_to_utf8_alloc (grub_uint32_t *src, grub_size_t size)
{
grub_size_t remaining;
grub_uint32_t *ptr;
grub_size_t cnt = 0;
grub_uint8_t *ret;
remaining = size;
ptr = src;
while (remaining--)
{
grub_uint32_t code = *ptr++;
if (code <= 0x007F)
cnt++;
else if (code <= 0x07FF)
cnt += 2;
else if ((code >= 0xDC00 && code <= 0xDFFF)
|| (code >= 0xD800 && code <= 0xDBFF))
/* No surrogates in UCS-4... */
cnt++;
else
cnt += 3;
}
cnt++;
ret = grub_malloc (cnt);
if (!ret)
return 0;
grub_ucs4_to_utf8 (src, size, ret, cnt);
return (char *) ret;
}
int
grub_is_valid_utf8 (const grub_uint8_t *src, grub_size_t srcsize)
{
grub_uint32_t code = 0;
int count = 0;
while (srcsize)
{
grub_uint32_t c = *src++;
if (srcsize != (grub_size_t)-1)
srcsize--;
if (count)
{
if ((c & 0xc0) != 0x80)
{
/* invalid */
return 0;
}
else
{
code <<= 6;
code |= (c & 0x3f);
count--;
}
}
else
{
if (c == 0)
break;
if ((c & 0x80) == 0x00)
code = c;
else if ((c & 0xe0) == 0xc0)
{
count = 1;
code = c & 0x1f;
}
else if ((c & 0xf0) == 0xe0)
{
count = 2;
code = c & 0x0f;
}
else if ((c & 0xf8) == 0xf0)
{
count = 3;
code = c & 0x07;
}
else if ((c & 0xfc) == 0xf8)
{
count = 4;
code = c & 0x03;
}
else if ((c & 0xfe) == 0xfc)
{
count = 5;
code = c & 0x01;
}
else
return 0;
}
}
return 1;
}
int
grub_utf8_to_ucs4_alloc (const char *msg, grub_uint32_t **unicode_msg,
grub_uint32_t **last_position)
{
grub_size_t msg_len = grub_strlen (msg);
*unicode_msg = grub_malloc (grub_strlen (msg) * sizeof (grub_uint32_t));
if (!*unicode_msg)
{
grub_printf ("utf8_to_ucs4 ERROR1: %s", msg);
return -1;
}
msg_len = grub_utf8_to_ucs4 (*unicode_msg, msg_len,
(grub_uint8_t *) msg, -1, 0);
*last_position = *unicode_msg + msg_len;
return msg_len;
}
/* Convert a (possibly null-terminated) UTF-8 string of at most SRCSIZE
bytes (if SRCSIZE is -1, it is ignored) in length to a UCS-4 string.
Return the number of characters converted. DEST must be able to hold
at least DESTSIZE characters.
If SRCEND is not NULL, then *SRCEND is set to the next byte after the
last byte used in SRC. */
grub_size_t
grub_utf8_to_ucs4 (grub_uint32_t *dest, grub_size_t destsize,
const grub_uint8_t *src, grub_size_t srcsize,
const grub_uint8_t **srcend)
{
grub_uint32_t *p = dest;
int count = 0;
grub_uint32_t code = 0;
if (srcend)
*srcend = src;
while (srcsize && destsize)
{
grub_uint32_t c = *src++;
if (srcsize != (grub_size_t)-1)
srcsize--;
if (count)
{
if ((c & 0xc0) != 0x80)
{
/* invalid */
code = '?';
/* Character c may be valid, don't eat it. */
src--;
if (srcsize != (grub_size_t)-1)
srcsize++;
count = 0;
}
else
{
code <<= 6;
code |= (c & 0x3f);
count--;
}
}
else
{
if (c == 0)
break;
if ((c & 0x80) == 0x00)
code = c;
else if ((c & 0xe0) == 0xc0)
{
count = 1;
code = c & 0x1f;
}
else if ((c & 0xf0) == 0xe0)
{
count = 2;
code = c & 0x0f;
}
else if ((c & 0xf8) == 0xf0)
{
count = 3;
code = c & 0x07;
}
else if ((c & 0xfc) == 0xf8)
{
count = 4;
code = c & 0x03;
}
else if ((c & 0xfe) == 0xfc)
{
count = 5;
code = c & 0x01;
}
else
{
/* invalid */
code = '?';
count = 0;
}
}
if (count == 0)
{
*p++ = code;
destsize--;
}
}
if (srcend)
*srcend = src;
return p - dest;
}
static grub_uint8_t *bidi_types = NULL;
static void
unpack_bidi (void)
{
unsigned i;
struct grub_unicode_compact_range *cur;
bidi_types = grub_zalloc (GRUB_UNICODE_MAX_CACHED_CHAR);
if (!bidi_types)
{
grub_errno = GRUB_ERR_NONE;
return;
}
for (cur = grub_unicode_compact; cur->end; cur++)
for (i = cur->start; i <= cur->end
&& i < GRUB_UNICODE_MAX_CACHED_CHAR; i++)
if (cur->bidi_mirror)
bidi_types[i] = cur->bidi_type | 0x80;
else
bidi_types[i] = cur->bidi_type | 0x00;
}
static inline enum grub_bidi_type
get_bidi_type (grub_uint32_t c)
{
struct grub_unicode_compact_range *cur;
if (!bidi_types)
unpack_bidi ();
if (bidi_types && c < GRUB_UNICODE_MAX_CACHED_CHAR)
return bidi_types[c] & 0x7f;
for (cur = grub_unicode_compact; cur->end; cur++)
if (cur->start <= c && c <= cur->end)
return cur->bidi_type;
return GRUB_BIDI_TYPE_L;
}
static inline int
is_mirrored (grub_uint32_t c)
{
struct grub_unicode_compact_range *cur;
if (!bidi_types)
unpack_bidi ();
if (bidi_types && c < GRUB_UNICODE_MAX_CACHED_CHAR)
return !!(bidi_types[c] & 0x80);
for (cur = grub_unicode_compact; cur->end; cur++)
if (cur->start <= c && c <= cur->end)
return cur->bidi_mirror;
return 0;
}
enum grub_comb_type
grub_unicode_get_comb_type (grub_uint32_t c)
{
static grub_uint8_t *comb_types = NULL;
struct grub_unicode_compact_range *cur;
if (!comb_types)
{
unsigned i;
comb_types = grub_zalloc (GRUB_UNICODE_MAX_CACHED_CHAR);
if (comb_types)
for (cur = grub_unicode_compact; cur->end; cur++)
for (i = cur->start; i <= cur->end
&& i < GRUB_UNICODE_MAX_CACHED_CHAR; i++)
comb_types[i] = cur->comb_type;
else
grub_errno = GRUB_ERR_NONE;
}
if (comb_types && c < GRUB_UNICODE_MAX_CACHED_CHAR)
return comb_types[c];
for (cur = grub_unicode_compact; cur->end; cur++)
if (cur->start <= c && c <= cur->end)
return cur->comb_type;
return GRUB_UNICODE_COMB_NONE;
}
#ifdef HAVE_UNIFONT_WIDTHSPEC
grub_ssize_t
grub_unicode_estimate_width (const struct grub_unicode_glyph *c)
{
if (grub_unicode_get_comb_type (c->base))
return 0;
if (widthspec[c->base >> 3] & (1 << (c->base & 7)))
return 2;
else
return 1;
}
#endif
grub_size_t
grub_unicode_aglomerate_comb (const grub_uint32_t *in, grub_size_t inlen,
struct grub_unicode_glyph *out)
{
int haveout = 0;
const grub_uint32_t *ptr;
unsigned last_comb_pointer = 0;
grub_memset (out, 0, sizeof (*out));
for (ptr = in; ptr < in + inlen; ptr++)
{
/* Variation selectors >= 17 are outside of BMP and SMP.
Handle variation selectors first to avoid potentially costly lookups.
*/
if (*ptr >= GRUB_UNICODE_VARIATION_SELECTOR_1
&& *ptr <= GRUB_UNICODE_VARIATION_SELECTOR_16)
{
if (haveout)
out->variant = *ptr - GRUB_UNICODE_VARIATION_SELECTOR_1 + 1;
continue;
}
if (*ptr >= GRUB_UNICODE_VARIATION_SELECTOR_17
&& *ptr <= GRUB_UNICODE_VARIATION_SELECTOR_256)
{
if (haveout)
out->variant = *ptr - GRUB_UNICODE_VARIATION_SELECTOR_17 + 17;
continue;
}
enum grub_comb_type comb_type;
comb_type = grub_unicode_get_comb_type (*ptr);
if (comb_type)
{
struct grub_unicode_combining *n;
unsigned j;
if (!haveout)
continue;
if (comb_type == GRUB_UNICODE_COMB_MC
|| comb_type == GRUB_UNICODE_COMB_ME
|| comb_type == GRUB_UNICODE_COMB_MN)
last_comb_pointer = out->ncomb;
n = grub_realloc (out->combining,
sizeof (n[0]) * (out->ncomb + 1));
if (!n)
{
grub_errno = GRUB_ERR_NONE;
continue;
}
for (j = last_comb_pointer; j < out->ncomb; j++)
if (out->combining[j].type > comb_type)
break;
grub_memmove (out->combining + j + 1,
out->combining + j,
(out->ncomb - j)
* sizeof (out->combining[0]));
out->combining = n;
out->combining[j].code = *ptr;
out->combining[j].type = comb_type;
out->ncomb++;
continue;
}
if (haveout)
return ptr - in;
haveout = 1;
out->base = *ptr;
out->variant = 0;
out->attributes = 0;
out->ncomb = 0;
out->estimated_width = 1;
out->combining = NULL;
}
return ptr - in;
}
static grub_ssize_t
bidi_line_wrap (struct grub_unicode_glyph *visual_out,
struct grub_unicode_glyph *visual,
grub_size_t visual_len, unsigned *levels,
grub_ssize_t (*getcharwidth) (const struct grub_unicode_glyph *visual),
grub_size_t maxwidth, grub_size_t startwidth)
{
struct grub_unicode_glyph *outptr = visual_out;
unsigned line_start = 0;
grub_ssize_t line_width = startwidth;
unsigned k;
grub_ssize_t last_space = -1;
grub_ssize_t last_space_width = 0;
auto void revert (unsigned start, unsigned end);
void revert (unsigned start, unsigned end)
{
struct grub_unicode_glyph t;
unsigned i, tl;
for (i = 0; i <= (end - start) / 2; i++)
{
t = visual[start + i];
visual[start + i] = visual[end - i];
visual[end - i] = t;
tl = levels[start + i];
levels[start + i] = levels[end - i];
levels[end - i] = tl;
}
}
if (!visual_len)
return 0;
for (k = 0; k <= visual_len; k++)
{
grub_ssize_t last_width = 0;
if (getcharwidth && k != visual_len)
line_width += last_width = getcharwidth (&visual[k]);
if (k != visual_len && visual[k].base == ' ')
{
last_space = k;
last_space_width = line_width;
}
if (((grub_ssize_t) maxwidth > 0
&& line_width > (grub_ssize_t) maxwidth) || k == visual_len)
{
unsigned min_odd_level = 0xffffffff;
unsigned max_level = 0;
unsigned j;
unsigned i;
if (k != visual_len && last_space > (signed) line_start)
k = last_space;
else if (k != visual_len && line_start == 0 && startwidth != 0)
{
k = 0;
last_space_width = startwidth;
}
else
last_space_width = line_width - last_width;
for (i = line_start; i < k; i++)
{
if (levels[i] > max_level)
max_level = levels[i];
if (levels[i] < min_odd_level && (levels[i] & 1))
min_odd_level = levels[i];
}
/* FIXME: can be optimized. */
for (j = max_level; j >= min_odd_level; j--)
{
unsigned in = 0;
for (i = line_start; i < k; i++)
{
if (i != line_start && levels[i] >= j && levels[i-1] < j)
in = i;
if (levels[i] >= j && (i + 1 == k || levels[i+1] < j))
revert (in, i);
}
}
for (i = line_start; i < k; i++)
if (is_mirrored (visual[i].base) && levels[i])
visual[i].attributes |= GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR;
grub_memcpy (outptr, &visual[line_start],
(k - line_start) * sizeof (visual[0]));
outptr += k - line_start;
if (k != visual_len)
{
grub_memset (outptr, 0, sizeof (visual[0]));
outptr->base = '\n';
outptr++;
}
if ((signed) k == last_space)
k++;
line_start = k;
line_width -= last_space_width;
}
}
return outptr - visual_out;
}
static grub_ssize_t
grub_bidi_line_logical_to_visual (const grub_uint32_t *logical,
grub_size_t logical_len,
struct grub_unicode_glyph *visual_out,
grub_ssize_t (*getcharwidth) (const struct grub_unicode_glyph *visual),
grub_size_t maxwidth, grub_size_t startwidth)
{
enum grub_bidi_type type = GRUB_BIDI_TYPE_L;
enum override_status {OVERRIDE_NEUTRAL = 0, OVERRIDE_R, OVERRIDE_L};
unsigned *levels;
enum grub_bidi_type *resolved_types;
unsigned base_level;
enum override_status cur_override;
unsigned i;
unsigned stack_level[GRUB_BIDI_MAX_EXPLICIT_LEVEL + 3];
enum override_status stack_override[GRUB_BIDI_MAX_EXPLICIT_LEVEL + 3];
unsigned stack_depth = 0;
unsigned invalid_pushes = 0;
unsigned visual_len = 0;
unsigned run_start, run_end;
struct grub_unicode_glyph *visual;
unsigned cur_level;
auto void push_stack (unsigned new_override, unsigned new_level);
void push_stack (unsigned new_override, unsigned new_level)
{
if (new_level > GRUB_BIDI_MAX_EXPLICIT_LEVEL)
{
invalid_pushes++;
return;
}
stack_level[stack_depth] = cur_level;
stack_override[stack_depth] = cur_override;
stack_depth++;
cur_level = new_level;
cur_override = new_override;
}
auto void pop_stack (void);
void pop_stack (void)
{
if (invalid_pushes)
{
invalid_pushes--;
return;
}
if (!stack_depth)
return;
stack_depth--;
cur_level = stack_level[stack_depth];
cur_override = stack_override[stack_depth];
}
levels = grub_malloc (sizeof (levels[0]) * logical_len);
if (!levels)
return -1;
resolved_types = grub_malloc (sizeof (resolved_types[0]) * logical_len);
if (!resolved_types)
{
grub_free (levels);
return -1;
}
visual = grub_malloc (sizeof (visual[0]) * logical_len);
if (!visual)
{
grub_free (resolved_types);
grub_free (levels);
return -1;
}
for (i = 0; i < logical_len; i++)
{
type = get_bidi_type (logical[i]);
if (type == GRUB_BIDI_TYPE_L || type == GRUB_BIDI_TYPE_AL
|| type == GRUB_BIDI_TYPE_R)
break;
}
if (type == GRUB_BIDI_TYPE_R || type == GRUB_BIDI_TYPE_AL)
base_level = 1;
else
base_level = 0;
cur_level = base_level;
cur_override = OVERRIDE_NEUTRAL;
{
const grub_uint32_t *lptr;
for (lptr = logical; lptr < logical + logical_len;)
{
grub_size_t p = grub_unicode_aglomerate_comb (lptr, logical
+ logical_len - lptr,
&visual[visual_len]);
type = get_bidi_type (visual[visual_len].base);
switch (type)
{
case GRUB_BIDI_TYPE_RLE:
push_stack (cur_override, (cur_level | 1) + 1);
break;
case GRUB_BIDI_TYPE_RLO:
push_stack (OVERRIDE_R, (cur_level | 1) + 1);
break;
case GRUB_BIDI_TYPE_LRE:
push_stack (cur_override, (cur_level & ~1) + 2);
break;
case GRUB_BIDI_TYPE_LRO:
push_stack (OVERRIDE_L, (cur_level & ~1) + 2);
break;
case GRUB_BIDI_TYPE_PDF:
pop_stack ();
break;
case GRUB_BIDI_TYPE_BN:
break;
default:
{
levels[visual_len] = cur_level;
if (cur_override != OVERRIDE_NEUTRAL)
resolved_types[visual_len] =
(cur_override == OVERRIDE_L) ? GRUB_BIDI_TYPE_L
: GRUB_BIDI_TYPE_R;
else
resolved_types[visual_len] = type;
visual_len++;
}
}
lptr += p;
}
}
for (run_start = 0; run_start < visual_len; run_start = run_end)
{
unsigned prev_level, next_level, cur_run_level;
unsigned last_type, last_strong_type;
for (run_end = run_start; run_end < visual_len &&
levels[run_end] == levels[run_start]; run_end++);
if (run_start == 0)
prev_level = base_level;
else
prev_level = levels[run_start - 1];
if (run_end == visual_len)
next_level = base_level;
else
next_level = levels[run_end];
cur_run_level = levels[run_start];
if (prev_level & 1)
last_type = GRUB_BIDI_TYPE_R;
else
last_type = GRUB_BIDI_TYPE_L;
last_strong_type = last_type;
for (i = run_start; i < run_end; i++)
{
switch (resolved_types[i])
{
case GRUB_BIDI_TYPE_NSM:
resolved_types[i] = last_type;
break;
case GRUB_BIDI_TYPE_EN:
if (last_strong_type == GRUB_BIDI_TYPE_AL)
resolved_types[i] = GRUB_BIDI_TYPE_AN;
break;
case GRUB_BIDI_TYPE_L:
case GRUB_BIDI_TYPE_R:
last_strong_type = resolved_types[i];
break;
case GRUB_BIDI_TYPE_ES:
if (last_type == GRUB_BIDI_TYPE_EN
&& i + 1 < run_end
&& resolved_types[i + 1] == GRUB_BIDI_TYPE_EN)
resolved_types[i] = GRUB_BIDI_TYPE_EN;
else
resolved_types[i] = GRUB_BIDI_TYPE_ON;
break;
case GRUB_BIDI_TYPE_ET:
{
unsigned j;
if (last_type == GRUB_BIDI_TYPE_EN)
{
resolved_types[i] = GRUB_BIDI_TYPE_EN;
break;
}
for (j = i; j < run_end
&& resolved_types[j] == GRUB_BIDI_TYPE_ET; j++);
if (j != run_end && resolved_types[j] == GRUB_BIDI_TYPE_EN)
{
for (; i < run_end
&& resolved_types[i] == GRUB_BIDI_TYPE_ET; i++)
resolved_types[i] = GRUB_BIDI_TYPE_EN;
i--;
break;
}
for (; i < run_end
&& resolved_types[i] == GRUB_BIDI_TYPE_ET; i++)
resolved_types[i] = GRUB_BIDI_TYPE_ON;
i--;
break;
}
break;
case GRUB_BIDI_TYPE_CS:
if (last_type == GRUB_BIDI_TYPE_EN
&& i + 1 < run_end
&& resolved_types[i + 1] == GRUB_BIDI_TYPE_EN)
{
resolved_types[i] = GRUB_BIDI_TYPE_EN;
break;
}
if (last_type == GRUB_BIDI_TYPE_AN
&& i + 1 < run_end
&& (resolved_types[i + 1] == GRUB_BIDI_TYPE_AN
|| (resolved_types[i + 1] == GRUB_BIDI_TYPE_EN
&& last_strong_type == GRUB_BIDI_TYPE_AL)))
{
resolved_types[i] = GRUB_BIDI_TYPE_EN;
break;
}
resolved_types[i] = GRUB_BIDI_TYPE_ON;
break;
case GRUB_BIDI_TYPE_AL:
last_strong_type = resolved_types[i];
resolved_types[i] = GRUB_BIDI_TYPE_R;
break;
default: /* Make GCC happy. */
break;
}
last_type = resolved_types[i];
if (resolved_types[i] == GRUB_BIDI_TYPE_EN
&& last_strong_type == GRUB_BIDI_TYPE_L)
resolved_types[i] = GRUB_BIDI_TYPE_L;
}
if (prev_level & 1)
last_type = GRUB_BIDI_TYPE_R;
else
last_type = GRUB_BIDI_TYPE_L;
for (i = run_start; i < run_end; )
{
unsigned j;
unsigned next_type;
for (j = i; j < run_end &&
(resolved_types[j] == GRUB_BIDI_TYPE_B
|| resolved_types[j] == GRUB_BIDI_TYPE_S
|| resolved_types[j] == GRUB_BIDI_TYPE_WS
|| resolved_types[j] == GRUB_BIDI_TYPE_ON); j++);
if (j == i)
{
if (resolved_types[i] == GRUB_BIDI_TYPE_L)
last_type = GRUB_BIDI_TYPE_L;
else
last_type = GRUB_BIDI_TYPE_R;
i++;
continue;
}
if (j == run_end)
next_type = (next_level & 1) ? GRUB_BIDI_TYPE_R : GRUB_BIDI_TYPE_L;
else
{
if (resolved_types[j] == GRUB_BIDI_TYPE_L)
next_type = GRUB_BIDI_TYPE_L;
else
next_type = GRUB_BIDI_TYPE_R;
}
if (next_type == last_type)
for (; i < j; i++)
resolved_types[i] = last_type;
else
for (; i < j; i++)
resolved_types[i] = (cur_run_level & 1) ? GRUB_BIDI_TYPE_R
: GRUB_BIDI_TYPE_L;
}
}
for (i = 0; i < visual_len; i++)
{
if (!(levels[i] & 1) && resolved_types[i] == GRUB_BIDI_TYPE_R)
{
levels[i]++;
continue;
}
if (!(levels[i] & 1) && (resolved_types[i] == GRUB_BIDI_TYPE_AN
|| resolved_types[i] == GRUB_BIDI_TYPE_EN))
{
levels[i] += 2;
continue;
}
if ((levels[i] & 1) && (resolved_types[i] == GRUB_BIDI_TYPE_L
|| resolved_types[i] == GRUB_BIDI_TYPE_AN
|| resolved_types[i] == GRUB_BIDI_TYPE_EN))
{
levels[i]++;
continue;
}
}
grub_free (resolved_types);
{
grub_ssize_t ret;
ret = bidi_line_wrap (visual_out, visual, visual_len, levels,
getcharwidth, maxwidth, startwidth);
grub_free (levels);
grub_free (visual);
return ret;
}
}
grub_ssize_t
grub_bidi_logical_to_visual (const grub_uint32_t *logical,
grub_size_t logical_len,
struct grub_unicode_glyph **visual_out,
grub_ssize_t (*getcharwidth) (const struct grub_unicode_glyph *visual),
grub_size_t max_length, grub_size_t startwidth)
{
const grub_uint32_t *line_start = logical, *ptr;
struct grub_unicode_glyph *visual_ptr;
*visual_out = visual_ptr = grub_malloc (2 * sizeof (visual_ptr[0])
* logical_len);
for (ptr = logical; ptr <= logical + logical_len; ptr++)
{
if (ptr == logical + logical_len || *ptr == '\n')
{
grub_ssize_t ret;
ret = grub_bidi_line_logical_to_visual (line_start,
ptr - line_start,
visual_ptr,
getcharwidth,
max_length,
startwidth);
startwidth = 0;
if (ret < 0)
{
grub_free (*visual_out);
return ret;
}
visual_ptr += ret;
line_start = ptr;
if (ptr != logical + logical_len)
{
grub_memset (visual_ptr, 0, sizeof (visual_ptr[0]));
visual_ptr->base = '\n';
visual_ptr++;
line_start++;
}
}
}
return visual_ptr - *visual_out;
}
static grub_uint32_t
map_code (grub_uint32_t in, struct grub_term_output *term)
{
if (in <= 0x7f)
return in;
switch (term->flags & GRUB_TERM_CODE_TYPE_MASK)
{
case GRUB_TERM_CODE_TYPE_VGA:
switch (in)
{
case GRUB_TERM_DISP_LEFT:
return 0x1b;
case GRUB_TERM_DISP_UP:
return 0x18;
case GRUB_TERM_DISP_RIGHT:
return 0x1a;
case GRUB_TERM_DISP_DOWN:
return 0x19;
case GRUB_TERM_DISP_HLINE:
return 0xc4;
case GRUB_TERM_DISP_VLINE:
return 0xb3;
case GRUB_TERM_DISP_UL:
return 0xda;
case GRUB_TERM_DISP_UR:
return 0xbf;
case GRUB_TERM_DISP_LL:
return 0xc0;
case GRUB_TERM_DISP_LR:
return 0xd9;
}
return '?';
case GRUB_TERM_CODE_TYPE_ASCII:
/* Better than nothing. */
switch (in)
{
case GRUB_TERM_DISP_LEFT:
return '<';
case GRUB_TERM_DISP_UP:
return '^';
case GRUB_TERM_DISP_RIGHT:
return '>';
case GRUB_TERM_DISP_DOWN:
return 'v';
case GRUB_TERM_DISP_HLINE:
return '-';
case GRUB_TERM_DISP_VLINE:
return '|';
case GRUB_TERM_DISP_UL:
case GRUB_TERM_DISP_UR:
case GRUB_TERM_DISP_LL:
case GRUB_TERM_DISP_LR:
return '+';
}
return '?';
}
return in;
}
static void
putglyph (const struct grub_unicode_glyph *c, struct grub_term_output *term)
{
struct grub_unicode_glyph c2 =
{
.variant = 0,
.attributes = 0,
.ncomb = 0,
.combining = 0,
.estimated_width = 1
};
if (c->base == '\t' && term->getxy)
{
int n;
n = 8 - ((term->getxy () >> 8) & 7);
c2.base = ' ';
while (n--)
(term->putchar) (&c2);
return;
}
if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
== GRUB_TERM_CODE_TYPE_UTF8_LOGICAL
|| (term->flags & GRUB_TERM_CODE_TYPE_MASK)
== GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
{
int i;
c2.estimated_width = grub_term_getcharwidth (term, c);
for (i = -1; i < (int) c->ncomb; i++)
{
grub_uint8_t u8[20], *ptr;
grub_uint32_t code;
if (i == -1)
code = c->base;
else
code = c->combining[i].code;
grub_ucs4_to_utf8 (&code, 1, u8, sizeof (u8));
for (ptr = u8; *ptr; ptr++)
{
c2.base = *ptr;
(term->putchar) (&c2);
c2.estimated_width = 0;
}
}
c2.estimated_width = 1;
}
else
(term->putchar) (c);
if (c->base == '\n')
{
c2.base = '\r';
(term->putchar) (&c2);
}
}
static void
putcode_real (grub_uint32_t code, struct grub_term_output *term)
{
struct grub_unicode_glyph c =
{
.variant = 0,
.attributes = 0,
.ncomb = 0,
.combining = 0,
.estimated_width = 1
};
c.base = map_code (code, term);
putglyph (&c, term);
}
/* Put a Unicode character. */
void
grub_putcode (grub_uint32_t code, struct grub_term_output *term)
{
/* Combining character by itself? */
if (grub_unicode_get_comb_type (code) != GRUB_UNICODE_COMB_NONE)
return;
putcode_real (code, term);
}
void
grub_print_ucs4 (const grub_uint32_t * str,
const grub_uint32_t * last_position,
int margin_left, int margin_right,
struct grub_term_output *term)
{
grub_ssize_t max_width;
grub_ssize_t startwidth;
{
struct grub_unicode_glyph space_glyph = {
.base = ' ',
.variant = 0,
.attributes = 0,
.ncomb = 0,
.combining = 0
};
max_width = grub_term_width (term)
- grub_term_getcharwidth (term, &space_glyph)
* (margin_left + margin_right) - 1;
}
if (((term->getxy () >> 8) & 0xff) < margin_left)
grub_print_spaces (term, margin_left - ((term->getxy () >> 8) & 0xff));
startwidth = ((term->getxy () >> 8) & 0xff) - margin_left;
if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
== GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS
|| (term->flags & GRUB_TERM_CODE_TYPE_MASK)
== GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
{
grub_ssize_t visual_len;
struct grub_unicode_glyph *visual;
struct grub_unicode_glyph *visual_ptr;
auto grub_ssize_t getcharwidth (const struct grub_unicode_glyph *c);
grub_ssize_t getcharwidth (const struct grub_unicode_glyph *c)
{
return grub_term_getcharwidth (term, c);
}
visual_len = grub_bidi_logical_to_visual (str, last_position - str,
&visual, getcharwidth,
max_width, startwidth);
if (visual_len < 0)
{
grub_print_error ();
return;
}
for (visual_ptr = visual; visual_ptr < visual + visual_len; visual_ptr++)
{
if (visual_ptr->base == '\n')
grub_print_spaces (term, margin_right);
putglyph (visual_ptr, term);
if (visual_ptr->base == '\n')
grub_print_spaces (term, margin_left);
grub_free (visual_ptr->combining);
}
grub_free (visual);
return;
}
{
const grub_uint32_t *ptr;
grub_ssize_t line_width = startwidth;
grub_ssize_t lastspacewidth = 0;
const grub_uint32_t *line_start = str, *last_space = str - 1;
for (ptr = str; ptr < last_position; ptr++)
{
grub_ssize_t last_width = 0;
if (grub_unicode_get_comb_type (*ptr) == GRUB_UNICODE_COMB_NONE)
{
struct grub_unicode_glyph c = {
.variant = 0,
.attributes = 0,
.ncomb = 0,
.combining = 0
};
c.base = *ptr;
line_width += last_width = grub_term_getcharwidth (term, &c);
}
if (*ptr == ' ')
{
lastspacewidth = line_width;
last_space = ptr;
}
if (line_width > max_width || *ptr == '\n')
{
const grub_uint32_t *ptr2;
if (line_width > max_width && last_space > line_start)
ptr = last_space;
else if (line_width > max_width
&& line_start == str && startwidth != 0)
{
ptr = str;
lastspacewidth = startwidth;
}
else
lastspacewidth = line_width - last_width;
for (ptr2 = line_start; ptr2 < ptr; ptr2++)
{
/* Skip combining characters on non-UTF8 terminals. */
if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
!= GRUB_TERM_CODE_TYPE_UTF8_LOGICAL
&& grub_unicode_get_comb_type (*ptr2)
!= GRUB_UNICODE_COMB_NONE)
continue;
putcode_real (*ptr2, term);
}
grub_print_spaces (term, margin_right);
grub_putcode ('\n', term);
line_width -= lastspacewidth;
grub_print_spaces (term, margin_left);
if (ptr == last_space || *ptr == '\n')
ptr++;
line_start = ptr;
}
}
{
const grub_uint32_t *ptr2;
for (ptr2 = line_start; ptr2 < last_position; ptr2++)
{
/* Skip combining characters on non-UTF8 terminals. */
if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
!= GRUB_TERM_CODE_TYPE_UTF8_LOGICAL
&& grub_unicode_get_comb_type (*ptr2)
!= GRUB_UNICODE_COMB_NONE)
continue;
putcode_real (*ptr2, term);
}
}
}
}
void
grub_xputs_normal (const char *str)
{
grub_term_output_t term;
FOR_ACTIVE_TERM_OUTPUTS(term)
{
grub_uint32_t *unicode_str, *unicode_last_position;
grub_utf8_to_ucs4_alloc (str, &unicode_str,
&unicode_last_position);
grub_print_ucs4 (unicode_str, unicode_last_position, 0, 0, term);
grub_free (unicode_str);
}
}
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