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Change charset enumeration functions to more sensible API

This commit is contained in:
Keith Packard 2002-05-24 05:20:02 +00:00
parent c9f55ecb06
commit 3673201215
2 changed files with 45 additions and 14 deletions
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13
fontconfig/fontconfig.h
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@ -347,8 +347,19 @@ FcCharSetIntersectCount (const FcCharSet *a, const FcCharSet *b);
FcChar32
FcCharSetSubtractCount (const FcCharSet *a, const FcCharSet *b);
#define FC_CHARSET_MAP_SIZE (256/32)
#define FC_CHARSET_DONE ((FcChar32) -1)
FcChar32
FcCharSetCoverage (const FcCharSet *a, FcChar32 page, FcChar32 *result);
FcCharSetFirstPage (const FcCharSet *a,
FcChar32 map[FC_CHARSET_MAP_SIZE],
FcChar32 *next);
FcChar32
FcCharSetNextPage (const FcCharSet *a,
FcChar32 map[FC_CHARSET_MAP_SIZE],
FcChar32 *next);
/* fcdbg.c */
void

44
src/fccharset.c
View File

@ -1,5 +1,5 @@
/*
* $XFree86: xc/lib/fontconfig/src/fccharset.c,v 1.3 2002/02/18 22:29:28 keithp Exp $
* $XFree86: xc/lib/fontconfig/src/fccharset.c,v 1.6 2002/03/27 04:33:55 keithp Exp $
*
* Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc.
*
@ -557,27 +557,47 @@ FcCharSetSubtractCount (const FcCharSet *a, const FcCharSet *b)
return count;
}
/*
* These two functions efficiently walk the entire charmap for
* other software (like pango) that want their own copy
*/
FcChar32
FcCharSetCoverage (const FcCharSet *a, FcChar32 page, FcChar32 *result)
FcCharSetNextPage (const FcCharSet *a,
FcChar32 map[FC_CHARSET_MAP_SIZE],
FcChar32 *next)
{
FcCharSetIter ai;
FcChar32 page;
ai.ucs4 = page;
ai.ucs4 = *next;
FcCharSetIterSet (a, &ai);
if (!ai.leaf)
{
memset (result, '\0', 256 / 8);
page = 0;
}
else
{
memcpy (result, ai.leaf->map, sizeof (ai.leaf->map));
FcCharSetIterNext (a, &ai);
return FC_CHARSET_DONE;
/*
* Save current information
*/
page = ai.ucs4;
}
memcpy (map, ai.leaf->map, sizeof (ai.leaf->map));
/*
* Step to next page
*/
FcCharSetIterNext (a, &ai);
*next = ai.ucs4;
return page;
}
FcChar32
FcCharSetFirstPage (const FcCharSet *a,
FcChar32 map[FC_CHARSET_MAP_SIZE],
FcChar32 *next)
{
*next = 0;
return FcCharSetNextPage (a, map, next);
}
/*
* ASCII representation of charsets.
*