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/*
* $XFree86: xc/lib/Xft/xftstr.c,v 1.4 2000/12/20 10:24:27 keithp Exp $
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <ctype.h>
#include "xftint.h"
char *
_XftSaveString (const char *s)
{
char *r;
r = (char *) malloc (strlen (s) + 1);
if (!r)
return 0;
strcpy (r, s);
return r;
}
const char *
_XftGetInt(const char *ptr, int *val)
{
if (*ptr == '*') {
*val = -1;
ptr++;
} else
for (*val = 0; *ptr >= '0' && *ptr <= '9';)
*val = *val * 10 + *ptr++ - '0';
if (*ptr == '-')
return ptr;
return (char *) 0;
}
char *
_XftSplitStr (const char *field, char *save)
{
char *s = save;
char c;
while (*field)
{
if (*field == '-')
break;
c = *field++;
*save++ = c;
}
*save = 0;
return s;
}
char *
_XftDownStr (const char *field, char *save)
{
char *s = save;
char c;
while (*field)
{
c = *field++;
*save++ = c;
}
*save = 0;
return s;
}
const char *
_XftSplitField (const char *field, char *save)
{
char c;
while (*field)
{
if (*field == '-' || *field == '=')
break;
c = *field++;
*save++ = c;
}
*save = 0;
return field;
}
const char *
_XftSplitValue (const char *field, char *save)
{
char c;
while (*field)
{
if (*field == '-' || *field == ',')
break;
c = *field++;
*save++ = c;
}
*save = 0;
if (*field)
field++;
return field;
}
int
_XftMatchSymbolic (XftSymbolic *s, int n, const char *name, int def)
{
while (n--)
{
if (!_XftStrCmpIgnoreCase (s->name, name))
return s->value;
s++;
}
return def;
}
int
_XftStrCmpIgnoreCase (const char *s1, const char *s2)
{
char c1, c2;
for (;;)
{
c1 = *s1++;
c2 = *s2++;
if (!c1 || !c2)
break;
if (isupper (c1))
c1 = tolower (c1);
if (isupper (c2))
c2 = tolower (c2);
if (c1 != c2)
break;
}
return (int) c2 - (int) c1;
}
int
XftUtf8ToUcs4 (XftChar8 *src_orig,
XftChar32 *dst,
int len)
{
XftChar8 *src = src_orig;
XftChar8 s;
int extra;
XftChar32 result;
if (len == 0)
return 0;
s = *src++;
len--;
if (!(s & 0x80))
{
result = s;
extra = 0;
}
else if (!(s & 0x40))
{
return -1;
}
else if (!(s & 0x20))
{
result = s & 0x1f;
extra = 1;
}
else if (!(s & 0x10))
{
result = s & 0xf;
extra = 2;
}
else if (!(s & 0x08))
{
result = s & 0x07;
extra = 3;
}
else if (!(s & 0x04))
{
result = s & 0x03;
extra = 4;
}
else if ( ! (s & 0x02))
{
result = s & 0x01;
extra = 5;
}
else
{
return -1;
}
if (extra > len)
return -1;
while (extra--)
{
result <<= 6;
s = *src++;
if ((s & 0xc0) != 0x80)
return -1;
result |= s & 0x3f;
}
*dst = result;
return src - src_orig;
}
Bool
XftUtf8Len (XftChar8 *string,
int len,
int *nchar,
int *wchar)
{
int n;
int clen;
int width = 1;
XftChar32 c;
n = 0;
while (len)
{
clen = XftUtf8ToUcs4 (string, &c, len);
if (clen <= 0) /* malformed UTF8 string */
return False;
if (c >= 0x10000)
width = 4;
else if (c >= 0x100)
{
if (width == 1)
width = 2;
}
string += clen;
len -= clen;
n++;
}
*nchar = n;
*wchar = width;
return True;
}
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