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/*
Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization
dedicated to making software imaging solutions freely available.
You may not use this file except in compliance with the License.
obtain a copy of the License at
http://www.imagemagick.org/script/license.php
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
MagickCore private token methods.
*/
#ifndef _MAGICKCORE_TOKEN_PRIVATE_H
#define _MAGICKCORE_TOKEN_PRIVATE_H
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#ifndef EILSEQ
#define EILSEQ ENOENT
#endif
#define MaxMultibyteCodes 6
typedef struct
{
int
code_mask,
code_value,
utf_mask,
utf_value;
} UTFInfo;
static UTFInfo
utf_info[MaxMultibyteCodes] =
{
{ 0x80, 0x00, 0x000007f, 0x0000000 }, /* 1 byte sequence */
{ 0xE0, 0xC0, 0x00007ff, 0x0000080 }, /* 2 byte sequence */
{ 0xF0, 0xE0, 0x000ffff, 0x0000800 }, /* 3 byte sequence */
{ 0xF8, 0xF0, 0x01fffff, 0x0010000 }, /* 4 byte sequence */
{ 0xFC, 0xF8, 0x03fffff, 0x0200000 }, /* 5 byte sequence */
{ 0xFE, 0xFC, 0x7ffffff, 0x4000000 }, /* 6 byte sequence */
};
static inline unsigned char *ConvertLatin1ToUTF8(const unsigned char *content)
{
register const unsigned char
*p;
register unsigned char
*q;
size_t
length;
unsigned char
*utf8;
unsigned int
c;
length=0;
for (p=content; *p != '\0'; p++)
length+=(*p & 0x80) != 0 ? 2 : 1;
utf8=(unsigned char *) NULL;
if (~length >= 1)
utf8=(unsigned char *) AcquireQuantumMemory(length+1UL,sizeof(*utf8));
if (utf8 == (unsigned char *) NULL)
return((unsigned char *) NULL);
q=utf8;
for (p=content; *p != '\0'; p++)
{
c=(*p);
if ((c & 0x80) == 0)
*q++=c;
else
{
*q++=0xc0 | ((c >> 6) & 0x3f);
*q++=0x80 | (c & 0x3f);
}
}
*q='\0';
return(utf8);
}
static inline int GetNextUTFCode(const char *text,unsigned int *octets)
{
int
code;
register ssize_t
i;
register int
c,
unicode;
*octets=1;
if (text == (const char *) NULL)
{
errno=EINVAL;
return(-1);
}
code=(int) (*text++) & 0xff;
unicode=code;
for (i=0; i < MaxMultibyteCodes; i++)
{
if ((code & utf_info[i].code_mask) == utf_info[i].code_value)
{
unicode&=utf_info[i].utf_mask;
if (unicode < utf_info[i].utf_value)
{
errno=EILSEQ;
return(-1);
}
*octets=(unsigned int) (i+1);
return(unicode);
}
c=(int) (*text++ ^ 0x80) & 0xff;
if ((c & 0xc0) != 0)
{
errno=EILSEQ;
return(-1);
}
unicode=(unicode << 6) | c;
}
errno=EILSEQ;
return(-1);
}
static inline int GetUTFCode(const char *text)
{
unsigned int
octets;
return(GetNextUTFCode(text,&octets));
}
static inline unsigned int GetUTFOctets(const char *text)
{
unsigned int
octets;
(void) GetNextUTFCode(text,&octets);
return(octets);
}
static inline MagickBooleanType IsUTFSpace(int code)
{
if (((code >= 0x0009) && (code <= 0x000d)) || (code == 0x0020) ||
(code == 0x0085) || (code == 0x00a0) || (code == 0x1680) ||
(code == 0x180e) || ((code >= 0x2000) && (code <= 0x200a)) ||
(code == 0x2028) || (code == 0x2029) || (code == 0x202f) ||
(code == 0x205f) || (code == 0x3000))
return(MagickTrue);
return(MagickFalse);
}
static inline MagickBooleanType IsUTFValid(int code)
{
int
mask;
mask=(int) 0x7fffffff;
if (((code & ~mask) != 0) && ((code < 0xd800) || (code > 0xdfff)) &&
(code != 0xfffe) && (code != 0xffff))
return(MagickFalse);
return(MagickTrue);
}
static inline MagickBooleanType IsUTFAscii(int code)
{
int
mask;
mask=(int) 0x7f;
if ((code & ~mask) != 0)
return(MagickFalse);
return(MagickTrue);
}
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif
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