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/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2014 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program 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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/*
* Unicode related:
* Conversion between UTF-* and UCS-*.
* ToUnicode CMap
*
* Normalization?
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include "system.h"
#include "mem.h"
#include "error.h"
#include "unicode.h"
static int __verbose = 0;
#define UC_DEBUG 3
#define UC_DEBUG_STR "UC"
void
UC_set_verbose (void)
{
__verbose++;
}
#define UC_REPLACEMENT_CHAR 0x0000FFFDL
#define UC_SUR_SHIFT 10
#define UC_SUR_MASK 0x3FFUL
#define UC_SUR_LOW_START 0xDC00UL
#define UC_SUR_HIGH_START 0xD800UL
int
UC_sput_UTF16BE (int32_t ucv, unsigned char **pp, unsigned char *limptr)
{
int count = 0;
unsigned char *p = *pp;
if (ucv >= 0 && ucv <= 0xFFFF) {
if (p + 2 >= limptr)
ERROR("Not enough space available...");
p[0] = (ucv >> 8) & 0xff;
p[1] = ucv & 0xff;
count = 2;
} else if (ucv >= 0x010000L && ucv <= 0x10FFFFL) {
unsigned short high, low;
if (p + 4 >= limptr)
ERROR("Not enough space available...");
ucv -= 0x00010000L;
high = (ucv >> UC_SUR_SHIFT) + UC_SUR_HIGH_START;
low = (ucv & UC_SUR_MASK) + UC_SUR_LOW_START;
p[0] = (high >> 8) & 0xff;
p[1] = (high & 0xff);
p[2] = (low >> 8) & 0xff;
p[3] = (low & 0xff);
count = 4;
} else {
if (p + 2 >= limptr)
ERROR("Not enough space available...");
p[0] = (UC_REPLACEMENT_CHAR >> 8) & 0xff;
p[1] = (UC_REPLACEMENT_CHAR & 0xff);
count = 2;
}
*pp += count;
return count;
}
int
UC_is_valid (int32_t ucv)
{
if (ucv < 0 || (ucv >= 0x0000D800L && ucv <= 0x0000DFFFL))
return 0;
return 1;
}
int32_t
UC_UTF8_decode_char (const unsigned char **pp, const unsigned char *endptr)
{
const unsigned char *p = *pp;
int32_t ucv;
unsigned char c = *p++;
int nbytes;
if (c <= 0x7f) {
ucv = c;
nbytes = 0;
} else if ((c & 0xe0) == 0xc0) { /* 110x xxxx */
ucv = c & 31;
nbytes = 1;
} else if ((c & 0xf0) == 0xe0) { /* 1110 xxxx */
ucv = c & 0x0f;
nbytes = 2;
} else if ((c & 0xf8) == 0xf0) { /* 1111 0xxx */
ucv = c & 0x07;
nbytes = 3;
} else if ((c & 0xfc) == 0xf8) { /* 1111 10xx */
ucv = c & 0x03;
nbytes = 4;
} else if ((c & 0xfe) == 0xfc) { /* 1111 110x */
ucv = c & 0x01;
nbytes = 5;
} else {
return -1;
}
if (p + nbytes > endptr)
return -1;
while (nbytes-- > 0) {
c = *p++;
if ((c & 0xc0) != 0x80)
return -1;
ucv = (ucv << 6) | (c & 0x3f);
}
*pp = p;
return ucv;
}
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