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(gxv_kern_subtable_fmt0_pairs_validate): New function. Checks uniqueness of the gid pairs. 

(gxv_kern_subtable_fmt0_validate): Move some code to `gxv_kern_subtable_fmt0_pairs_validate'.
This commit is contained in:
Yamato, Masatake (大和正武) 2006-12-30 20:17:30 +00:00
parent 115b442b23
commit d5d3e41dac
2 changed files with 60 additions and 21 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-12-31 Masatake YAMATO <jet@gyve.org>
* src/gxvalid/gxvkern.c (gxv_kern_subtable_fmt0_pairs_validate): New function.
Checks uniqueness of the gid pairs.
(gxv_kern_subtable_fmt0_validate): Move some code to
`gxv_kern_subtable_fmt0_pairs_validate'.
2006-12-22 David Turner <david@freetype.org>
* src/autofit/aflatin.c, src/truetype/ttgload.c: removing compiler

74
src/gxvalid/gxvkern.c
View File

@ -105,6 +105,58 @@
/* ============================= format 0 ============================== */
static void
gxv_kern_subtable_fmt0_pairs_validate( FT_Bytes table,
FT_Bytes limit,
FT_UShort nPairs,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort i;
FT_UShort last_gid_left = 0;
FT_UShort last_gid_right = 0;
GXV_NAME_ENTER( "kern format 0 paris" );
for ( i = 0; i < nPairs; i++ )
{
FT_UShort gid_left;
FT_UShort gid_right;
FT_Short kernValue;
gid_left = FT_NEXT_USHORT( p );
gid_right = FT_NEXT_USHORT( p );
GXV_TRACE(( "left gid = %u, right gid = %u\n", gid_left, gid_right ));
gxv_glyphid_validate( gid_left, valid );
gxv_glyphid_validate( gid_right, valid );
/* A pair of left and right gid must be uniqe and be sorted. */
if ( gid_left == last_gid_left )
{
if ( last_gid_right < gid_right )
last_gid_right = gid_right;
else
FT_INVALID_DATA;
}
else if ( last_gid_left < gid_left )
{
last_gid_left = gid_left;
last_gid_right = gid_right;
}
else
FT_INVALID_DATA;
/* skip the kern value */
kernValue = FT_NEXT_SHORT( p );
}
GXV_EXIT;
}
static void
gxv_kern_subtable_fmt0_validate( FT_Bytes table,
FT_Bytes limit,
@ -114,7 +166,6 @@
FT_UShort nPairs;
FT_UShort unitSize;
FT_UShort i;
GXV_NAME_ENTER( "kern subtable format0" );
@ -127,26 +178,7 @@
gxv_BinSrchHeader_validate( p, limit, &unitSize, &nPairs, valid );
p += 2 + 2 + 2 + 2;
for ( i = 0; i < nPairs; i++ )
{
FT_UShort gid_left;
FT_UShort gid_right;
FT_Short kernValue;
/* TODO: should be checked pairs are unique. */
/* left */
gid_left = FT_NEXT_USHORT( p );
gxv_glyphid_validate( gid_left, valid );
/* right */
gid_right = FT_NEXT_USHORT( p );
gxv_glyphid_validate( gid_right, valid );
/* skip the kern value */
kernValue = FT_NEXT_SHORT( p );
}
gxv_kern_subtable_fmt0_pairs_validate( p, limit, nPairs, valid );
GXV_EXIT;
}