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More fixes for clang's `sanitize' feature.

Browse Source 
* src/base/ftcalc.c (FT_DivFix): Use unsigned values for
computations which use the left shift operator and convert to signed
as the last step.
* src/base/fttrigon.c (ft_trig_prenorm, FT_Vector_Rotate,
FT_Vector_Length, FT_Vector_Polarize): Ditto.

* src/cff/cffgload.c (cff_decoder_parse_charstrings): Simplify.
* src/cff/cffload.c (cff_subfont_load): Fix constant.
* src/cff/cffparse.c (cff_parse_integer, cff_parse_real, do_fixed,
cff_parse_fixed_dynamic): Use unsigned values for computations which
use the left shift operator and convert to signed as the last step.

* src/cid/cidload.c (cid_get_offset): Ditto.

* src/psaux/psconv.c (PS_Conv_ToFixed): Ditto.
* src/psaux/t1decode.c (t1_decoder_parse_charstrings): Ditto.

* src/truetype/ttinterp.c (TT_MulFix14, TT_DotFix14): Ditto.
2.6.5
Werner Lemberg 12 years ago
parent 138068fd07
commit 94152819b0
10 changed files with 77 additions and 44 deletions
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  1. 23
      ChangeLog
  2. 21
      src/base/ftcalc.c
  3. 13
      src/base/fttrigon.c
  4. 10
      src/cff/cffgload.c
  5. 2
      src/cff/cffload.c
  6. 18
      src/cff/cffparse.c
  7. 4
      src/cid/cidload.c
  8. 4
      src/psaux/psconv.c
  9. 16
      src/psaux/t1decode.c
  10. 10
      src/truetype/ttinterp.c

23
ChangeLog
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@ -1,3 +1,26 @@
2013-05-04 Werner Lemberg <wl@gnu.org>
More fixes for clang's `sanitize' feature.
* src/base/ftcalc.c (FT_DivFix): Use unsigned values for
computations which use the left shift operator and convert to signed
as the last step.
* src/base/fttrigon.c (ft_trig_prenorm, FT_Vector_Rotate,
FT_Vector_Length, FT_Vector_Polarize): Ditto.
* src/cff/cffgload.c (cff_decoder_parse_charstrings): Simplify.
* src/cff/cffload.c (cff_subfont_load): Fix constant.
* src/cff/cffparse.c (cff_parse_integer, cff_parse_real, do_fixed,
cff_parse_fixed_dynamic): Use unsigned values for computations which
use the left shift operator and convert to signed as the last step.
* src/cid/cidload.c (cid_get_offset): Ditto.
* src/psaux/psconv.c (PS_Conv_ToFixed): Ditto.
* src/psaux/t1decode.c (t1_decoder_parse_charstrings): Ditto.
* src/truetype/ttinterp.c (TT_MulFix14, TT_DotFix14): Ditto.
2013-05-04 Werner Lemberg <wl@gnu.org>
Fix errors reported by clang's `sanitize' feature.

21
src/base/ftcalc.c
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@ -284,16 +284,25 @@
FT_Int32 s;
FT_UInt32 q;
s = 1;
if ( a < 0 ) { a = -a; s = -1; }
if ( b < 0 ) { b = -b; s = -s; }
if ( a < 0 )
{
a = -a;
s = -1;
}
if ( b < 0 )
{
b = -b;
s = -s;
}
if ( b == 0 )
/* check for division by 0 */
q = 0x7FFFFFFFL;
else
/* compute result directly */
q = (FT_UInt32)( ( ( (FT_Int64)a << 16 ) + ( b >> 1 ) ) / b );
q = (FT_UInt32)( ( ( (FT_UInt64)a << 16 ) + ( b >> 1 ) ) / b );
return ( s < 0 ? -(FT_Long)q : (FT_Long)q );
}
@ -597,7 +606,7 @@
else if ( ( a >> 16 ) == 0 )
{
/* compute result directly */
q = (FT_UInt32)( ( a << 16 ) + ( b >> 1 ) ) / (FT_UInt32)b;
q = (FT_UInt32)( ( (FT_ULong)a << 16 ) + ( b >> 1 ) ) / (FT_UInt32)b;
}
else
{
@ -605,8 +614,8 @@
FT_Int64 temp, temp2;
temp.hi = (FT_Int32) ( a >> 16 );
temp.lo = (FT_UInt32)( a << 16 );
temp.hi = (FT_Int32)( a >> 16 );
temp.lo = (FT_UInt32)a << 16;
temp2.hi = 0;
temp2.lo = (FT_UInt32)( b >> 1 );
FT_Add64( &temp, &temp2, &temp );

13
src/base/fttrigon.c
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@ -131,8 +131,8 @@
if ( shift <= FT_TRIG_SAFE_MSB )
{
shift = FT_TRIG_SAFE_MSB - shift;
vec->x = x << shift;
vec->y = y << shift;
vec->x = (FT_Fixed)( (FT_UInt32)x << shift );
vec->y = (FT_Fixed)( (FT_UInt32)y << shift );
}
else
{
@ -392,8 +392,8 @@
else
{
shift = -shift;
vec->x = v.x << shift;
vec->y = v.y << shift;
vec->x = (FT_Fixed)( (FT_UInt32)v.x << shift );
vec->y = (FT_Fixed)( (FT_UInt32)v.y << shift );
}
}
}
@ -429,7 +429,7 @@
if ( shift > 0 )
return ( v.x + ( 1 << ( shift - 1 ) ) ) >> shift;
return v.x << -shift;
return (FT_Fixed)( (FT_UInt32)v.x << -shift );
}
@ -454,7 +454,8 @@
v.x = ft_trig_downscale( v.x );
*length = ( shift >= 0 ) ? ( v.x >> shift ) : ( v.x << -shift );
*length = ( shift >= 0 ) ? ( v.x >> shift )
: (FT_Fixed)( (FT_UInt32)v.x << -shift );
*angle = v.y;
}

10
src/cff/cffgload.c
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@ -975,7 +975,7 @@
{
if ( ip + 1 >= limit )
goto Syntax_Error;
val = (FT_Short)( ( (FT_UShort)ip[0] << 8 ) | ip[1] );
val = (FT_Short)( ( ip[0] << 8 ) | ip[1] );
ip += 2;
}
else if ( v < 247 )
@ -996,10 +996,10 @@
{
if ( ip + 3 >= limit )
goto Syntax_Error;
val = (FT_Int32)( ( (FT_UInt32)ip[0] << 24 ) |
( (FT_UInt32)ip[1] << 16 ) |
( (FT_UInt32)ip[2] << 8 ) |
(FT_UInt32)ip[3] );
val = (FT_Int32)( ( ip[0] << 24 ) |
( ip[1] << 16 ) |
( ip[2] << 8 ) |
ip[3] );
ip += 4;
if ( charstring_type == 2 )
shift = 0;

2
src/cff/cffload.c
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@ -1314,7 +1314,7 @@
/* set defaults */
FT_MEM_ZERO( top, sizeof ( *top ) );
top->underline_position = -100L << 16;
top->underline_position = -( 100L << 16 );
top->underline_thickness = 50L << 16;
top->charstring_type = 2;
top->font_matrix.xx = 0x10000L;

18
src/cff/cffparse.c
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@ -65,7 +65,7 @@
if ( p + 2 > limit )
goto Bad;
val = (FT_Short)( ( (FT_Int)p[0] << 8 ) | p[1] );
val = (FT_Short)( ( p[0] << 8 ) | p[1] );
p += 2;
}
else if ( v == 29 )
@ -73,10 +73,10 @@
if ( p + 4 > limit )
goto Bad;
val = ( (FT_Long)p[0] << 24 ) |
( (FT_Long)p[1] << 16 ) |
( (FT_Long)p[2] << 8 ) |
p[3];
val = (FT_Long)( ( p[0] << 24 ) |
( p[1] << 16 ) |
( p[2] << 8 ) |
p[3] );
p += 4;
}
else if ( v < 247 )
@ -316,7 +316,7 @@
else
exponent -= fraction_length;
result = number << 16;
result = (FT_Long)( (FT_ULong)number << 16 );
*scaling = exponent;
}
}
@ -373,7 +373,7 @@
if ( number > 0x7FFFL )
goto Overflow;
result = number << 16;
result = (FT_Long)( (FT_ULong)number << 16 );
}
}
@ -435,7 +435,7 @@
goto Overflow;
}
return val << 16;
return (FT_Long)( (FT_ULong)val << 16 );
Overflow:
FT_TRACE4(( "!!!OVERFLOW:!!!" ));
@ -501,7 +501,7 @@
else
{
*scaling = 0;
return number << 16;
return (FT_Long)( (FT_ULong)number << 16 );
}
}
}

4
src/cid/cidload.c
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@ -42,7 +42,7 @@
cid_get_offset( FT_Byte* *start,
FT_Byte offsize )
{
FT_Long result;
FT_ULong result;
FT_Byte* p = *start;
@ -53,7 +53,7 @@
}
*start = p;
return result;
return (FT_Long)result;
}

4
src/psaux/psconv.c
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@ -4,7 +4,7 @@
/* */
/* Some convenience conversions (body). */
/* */
/* Copyright 2006, 2008, 2009, 2012 by */
/* Copyright 2006, 2008, 2009, 2012-2013 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -229,7 +229,7 @@
if ( integral > 0x7FFF )
have_overflow = 1;
else
integral <<= 16;
integral = (FT_Fixed)( (FT_UInt32)integral << 16 );
}
/* read the decimal part */

16
src/psaux/t1decode.c
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@ -565,10 +565,10 @@
goto Syntax_Error;
}
value = (FT_Int32)( ( (FT_Long)ip[0] << 24 ) |
( (FT_Long)ip[1] << 16 ) |
( (FT_Long)ip[2] << 8 ) |
ip[3] );
value = (FT_Int32)( ( ip[0] << 24 ) |
( ip[1] << 16 ) |
( ip[2] << 8 ) |
ip[3] );
ip += 4;
/* According to the specification, values > 32000 or < -32000 must */
@ -591,7 +591,7 @@
else
{
if ( !large_int )
value <<= 16;
value = (FT_Int32)( (FT_UInt32)value << 16 );
}
break;
@ -611,13 +611,13 @@
}
if ( ip[-2] < 251 )
value = ( ( (FT_Int32)ip[-2] - 247 ) << 8 ) + ip[-1] + 108;
value = ( ( ip[-2] - 247 ) * 256 ) + ip[-1] + 108;
else
value = -( ( ( (FT_Int32)ip[-2] - 251 ) << 8 ) + ip[-1] + 108 );
value = -( ( ( ip[-2] - 251 ) * 256 ) + ip[-1] + 108 );
}
if ( !large_int )
value <<= 16;
value = (FT_Int32)( (FT_UInt32)value << 16 );
}
else
{

10
src/truetype/ttinterp.c
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@ -1479,7 +1479,7 @@
l = (FT_UInt32)( ( a & 0xFFFFU ) * b );
m = ( a >> 16 ) * b;
lo = l + (FT_UInt32)( m << 16 );
lo = l + ( (FT_UInt32)m << 16 );
hi = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo < l );
/* divide the result by 2^14 with rounding */
@ -1491,7 +1491,7 @@
l = lo + 0x2000U;
hi += l < lo;
return ( hi << 18 ) | ( l >> 14 );
return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) );
}
#endif
@ -1511,14 +1511,14 @@
l = (FT_UInt32)( ( ax & 0xFFFFU ) * bx );
m = ( ax >> 16 ) * bx;
lo1 = l + (FT_UInt32)( m << 16 );
lo1 = l + ( (FT_UInt32)m << 16 );
hi1 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo1 < l );
/* compute ay*by as 64-bit value */
l = (FT_UInt32)( ( ay & 0xFFFFU ) * by );
m = ( ay >> 16 ) * by;
lo2 = l + (FT_UInt32)( m << 16 );
lo2 = l + ( (FT_UInt32)m << 16 );
hi2 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo2 < l );
/* add them */
@ -1534,7 +1534,7 @@
l = lo + 0x2000U;
hi += ( l < lo );
return ( hi << 18 ) | ( l >> 14 );
return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) );
}

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