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Code Issues 9 Releases Wiki Activity

[truetype] Minor code refactoring. 

Two benefits: The allocated FDEF (and IDEF) array gets slightly
smaller, and the `ttdebug' demo program has access to function
numbers without additional costs.

Fortunately, no changes to FontForge are necessary – this is the
only external TrueType debugger I know of, but others may exist and
should check the code accordingly.

* src/truetype/ttinterp.h (TT_CallRec): Replace `Cur_Restart' and
`Cur_End' with a pointer to the corresponding `TT_DefRecord'
structure.

* src/truetype/ttinterp.c (DO_JROT, DO_JMPR, DO_JROF, Ins_ENDF,
Ins_CALL, Ins_LOOPCALL, Ins_UNKNOWN, TT_RunIns <Invalid_Opcode>):
Updated.
This commit is contained in:
Werner Lemberg 2013-11-01 13:26:28 +01:00
parent e921bdebde
commit ebf52d6a90
3 changed files with 57 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
ChangeLog
View File

@ -1,3 +1,23 @@
2013-11-01 Werner Lemberg <wl@gnu.org>
[truetype] Minor code refactoring.
Two benefits: The allocated FDEF (and IDEF) array gets slightly
smaller, and the `ttdebug' demo program has access to function
numbers without additional costs.
Fortunately, no changes to FontForge are necessary – this is the
only external TrueType debugger I know of, but others may exist and
should check the code accordingly.
* src/truetype/ttinterp.h (TT_CallRec): Replace `Cur_Restart' and
`Cur_End' with a pointer to the corresponding `TT_DefRecord'
structure.
* src/truetype/ttinterp.c (DO_JROT, DO_JMPR, DO_JROF, Ins_ENDF,
Ins_CALL, Ins_LOOPCALL, Ins_UNKNOWN, TT_RunIns <Invalid_Opcode>):
Updated.
2013-10-27 Werner Lemberg <wl@gnu.org>
[sfnt] Implement support for `OS/2' table version 5.

74
src/truetype/ttinterp.c
View File

@ -3151,42 +3151,42 @@
}
#define DO_JROT \
if ( args[1] != 0 ) \
{ \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE; \
#define DO_JROT \
if ( args[1] != 0 ) \
{ \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Def->end ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE; \
}
#define DO_JMPR \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
#define DO_JMPR \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Def->end ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE;
#define DO_JROF \
if ( args[1] == 0 ) \
{ \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE; \
#define DO_JROF \
if ( args[1] == 0 ) \
{ \
if ( args[0] == 0 && CUR.args == 0 ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.IP += args[0]; \
if ( CUR.IP < 0 || \
( CUR.callTop > 0 && \
CUR.IP > CUR.callStack[CUR.callTop - 1].Def->end ) ) \
CUR.error = FT_THROW( Bad_Argument ); \
CUR.step_ins = FALSE; \
}
@ -4902,7 +4902,7 @@
if ( pRec->Cur_Count > 0 )
{
CUR.callTop++;
CUR.IP = pRec->Cur_Restart;
CUR.IP = pRec->Def->start;
}
else
/* Loop through the current function */
@ -4992,8 +4992,7 @@
pCrec->Caller_Range = CUR.curRange;
pCrec->Caller_IP = CUR.IP + 1;
pCrec->Cur_Count = 1;
pCrec->Cur_Restart = def->start;
pCrec->Cur_End = def->end;
pCrec->Def = def;
CUR.callTop++;
@ -5081,8 +5080,7 @@
pCrec->Caller_Range = CUR.curRange;
pCrec->Caller_IP = CUR.IP + 1;
pCrec->Cur_Count = (FT_Int)args[0];
pCrec->Cur_Restart = def->start;
pCrec->Cur_End = def->end;
pCrec->Def = def;
CUR.callTop++;
@ -7917,8 +7915,7 @@
call->Caller_Range = CUR.curRange;
call->Caller_IP = CUR.IP + 1;
call->Cur_Count = 1;
call->Cur_Restart = def->start;
call->Cur_End = def->end;
call->Def = def;
INS_Goto_CodeRange( def->range, def->start );
@ -8974,8 +8971,7 @@
callrec->Caller_Range = CUR.curRange;
callrec->Caller_IP = CUR.IP + 1;
callrec->Cur_Count = 1;
callrec->Cur_Restart = def->start;
callrec->Cur_End = def->end;
callrec->Def = def;
if ( INS_Goto_CodeRange( def->range, def->start ) == FAILURE )
goto LErrorLabel_;

4
src/truetype/ttinterp.h
View File

@ -101,8 +101,8 @@ FT_BEGIN_HEADER
FT_Int Caller_Range;
FT_Long Caller_IP;
FT_Long Cur_Count;
FT_Long Cur_Restart;
FT_Long Cur_End;
TT_DefRecord *Def; /* either FDEF or IDEF */
} TT_CallRec, *TT_CallStack;