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base: Prevent some overflows on LP64 systems.

This commit is contained in:
suzuki toshiya 2009-08-01 00:30:24 +09:00
parent 072e55233e
commit 0d226c31c5
5 changed files with 99 additions and 26 deletions
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28
ChangeLog
View File

@ -1,3 +1,31 @@
2009-07-31 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
base: Prevent some overflows on LP64 systems.
* src/base/ftadvance.c (FT_Get_Advances): Cast the
unsigned long constant FT_LOAD_ADVANCE_ONLY to FT_UInt32
for LP64 platforms.
* src/base/ftcalc.c (FT_Sqrt32): All internal variables
are changed to FT_UInt32 from FT_ULong.
(FT_MulDiv): Insert casts to FT_Int32 for LP64 platforms.
This function is designed for 32-bit integer, although
their arguments and return value are FT_Long.
* src/base/ftobjs.c (FT_Get_Char_Index): Check `charcode'
is within unsigned 32-bit integer for LP64 platforms.
(FT_Face_GetCharVariantIndex): Check `charcode' and
`variantSelector' are within 32-bit integer for LP64
platforms.
(FT_Face_GetCharsOfVariant): Check `variantSelector' is
within unsigned 32-bit integer for LP64 platforms.
* src/base/fttrigon.c (ft_trig_downscale): The FT_Fixed
variable `val' and unsigned long constant FT_TRIG_SCALE
are casted to FT_UInt32, when calculates FT_UInt32.
(FT_Vector_Rotate): The long constant 1L is casted to
FT_Int32 to calculate FT_Int32 `half'.
2009-07-31 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
cff: Cast the long variables to 32-bit for LP64 systems.

2
src/base/ftadvanc.c
View File

@ -140,7 +140,7 @@
if ( flags & FT_ADVANCE_FLAG_FAST_ONLY )
return FT_Err_Unimplemented_Feature;
flags |= FT_LOAD_ADVANCE_ONLY;
flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY;
for ( nn = 0; nn < count; nn++ )
{
error = FT_Load_Glyph( face, start + nn, flags );

29
src/base/ftcalc.c
View File

@ -110,12 +110,12 @@
FT_EXPORT_DEF( FT_Int32 )
FT_Sqrt32( FT_Int32 x )
{
FT_ULong val, root, newroot, mask;
FT_UInt32 val, root, newroot, mask;
root = 0;
mask = 0x40000000L;
val = (FT_ULong)x;
mask = (FT_UInt32)0x40000000UL;
val = (FT_UInt32)x;
do
{
@ -362,6 +362,7 @@
long s;
/* XXX: this function does not allow 64-bit arguments */
if ( a == 0 || b == c )
return a;
@ -377,12 +378,12 @@
FT_Int64 temp, temp2;
ft_multo64( a, b, &temp );
ft_multo64( (FT_Int32)a, (FT_Int32)b, &temp );
temp2.hi = 0;
temp2.lo = (FT_UInt32)(c >> 1);
FT_Add64( &temp, &temp2, &temp );
a = ft_div64by32( temp.hi, temp.lo, c );
a = ft_div64by32( temp.hi, temp.lo, (FT_Int32)c );
}
else
a = 0x7FFFFFFFL;
@ -416,8 +417,8 @@
FT_Int64 temp;
ft_multo64( a, b, &temp );
a = ft_div64by32( temp.hi, temp.lo, c );
ft_multo64( (FT_Int32)a, (FT_Int32)b, &temp );
a = ft_div64by32( temp.hi, temp.lo, (FT_Int32)c );
}
else
a = 0x7FFFFFFFL;
@ -539,13 +540,14 @@
FT_UInt32 q;
s = a; a = FT_ABS( a );
s ^= b; b = FT_ABS( b );
/* XXX: this function does not allow 64-bit arguments */
s = (FT_Int32)a; a = FT_ABS( a );
s ^= (FT_Int32)b; b = FT_ABS( b );
if ( b == 0 )
{
/* check for division by 0 */
q = 0x7FFFFFFFL;
q = (FT_UInt32)0x7FFFFFFFL;
}
else if ( ( a >> 16 ) == 0 )
{
@ -562,7 +564,7 @@
temp2.hi = 0;
temp2.lo = (FT_UInt32)( b >> 1 );
FT_Add64( &temp, &temp2, &temp );
q = ft_div64by32( temp.hi, temp.lo, b );
q = ft_div64by32( temp.hi, temp.lo, (FT_Int32)b );
}
return ( s < 0 ? -(FT_Int32)q : (FT_Int32)q );
@ -889,8 +891,9 @@
FT_Int64 z1, z2;
ft_multo64( in_x, out_y, &z1 );
ft_multo64( in_y, out_x, &z2 );
/* XXX: this function does not allow 64-bit arguments */
ft_multo64( (FT_Int32)in_x, (FT_Int32)out_y, &z1 );
ft_multo64( (FT_Int32)in_y, (FT_Int32)out_x, &z2 );
if ( z1.hi > z2.hi )
result = +1;

56
src/base/ftobjs.c
View File

@ -3054,7 +3054,12 @@
FT_CMap cmap = FT_CMAP( face->charmap );
result = cmap->clazz->char_index( cmap, charcode );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large charcode" ));
FT_TRACE1(( " 0x%x is truncated\n", charcode ));
}
result = cmap->clazz->char_index( cmap, (FT_UInt32)charcode );
}
return result;
}
@ -3134,8 +3139,20 @@
FT_CMap vcmap = FT_CMAP( charmap );
result = vcmap->clazz->char_var_index( vcmap, ucmap, charcode,
variantSelector );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large charcode" ));
FT_TRACE1(( " 0x%x is truncated\n", charcode ));
}
if ( variantSelector > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" ));
FT_TRACE1(( " 0x%x is truncated\n", variantSelector ));
}
result = vcmap->clazz->char_var_index( vcmap, ucmap,
(FT_UInt32)charcode,
(FT_UInt32)variantSelector );
}
}
@ -3163,8 +3180,20 @@
FT_CMap vcmap = FT_CMAP( charmap );
result = vcmap->clazz->char_var_default( vcmap, charcode,
variantSelector );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large charcode" ));
FT_TRACE1(( " 0x%x is truncated\n", charcode ));
}
if ( variantSelector > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" ));
FT_TRACE1(( " 0x%x is truncated\n", variantSelector ));
}
result = vcmap->clazz->char_var_default( vcmap,
(FT_UInt32)charcode,
(FT_UInt32)variantSelector );
}
}
@ -3219,7 +3248,14 @@
FT_Memory memory = FT_FACE_MEMORY( face );
result = vcmap->clazz->charvariant_list( vcmap, memory, charcode );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large charcode" ));
FT_TRACE1(( " 0x%x is truncated\n", charcode ));
}
result = vcmap->clazz->charvariant_list( vcmap, memory,
(FT_UInt32)charcode );
}
}
return result;
@ -3246,8 +3282,14 @@
FT_Memory memory = FT_FACE_MEMORY( face );
if ( variantSelector > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" ));
FT_TRACE1(( " 0x%x is truncated\n", variantSelector ));
}
result = vcmap->clazz->variantchar_list( vcmap, memory,
variantSelector );
(FT_UInt32)variantSelector );
}
}

10
src/base/fttrigon.c
View File

@ -72,10 +72,10 @@
val = ( val >= 0 ) ? val : -val;
v1 = (FT_UInt32)val >> 16;
v2 = (FT_UInt32)val & 0xFFFFL;
v2 = (FT_UInt32)(val & 0xFFFFL);
k1 = FT_TRIG_SCALE >> 16; /* constant */
k2 = FT_TRIG_SCALE & 0xFFFFL; /* constant */
k1 = (FT_UInt32)FT_TRIG_SCALE >> 16; /* constant */
k2 = (FT_UInt32)(FT_TRIG_SCALE & 0xFFFFL); /* constant */
hi = k1 * v1;
lo1 = k1 * v2 + k2 * v1; /* can't overflow */
@ -86,7 +86,7 @@
hi += lo1 >> 16;
if ( lo1 < lo3 )
hi += 0x10000UL;
hi += (FT_UInt32)0x10000UL;
val = (FT_Fixed)hi;
@ -433,7 +433,7 @@
if ( shift > 0 )
{
FT_Int32 half = 1L << ( shift - 1 );
FT_Int32 half = (FT_Int32)1L << ( shift - 1 );
vec->x = ( v.x + half + FT_SIGN_LONG( v.x ) ) >> shift;