@ -53,45 +53,6 @@
# define MAX_RUNNABLE_OPCODES 1000000L
/*************************************************************************/
/* */
/* There are two kinds of implementations: */
/* */
/* a. static implementation */
/* */
/* The current execution context is a static variable, which fields */
/* are accessed directly by the interpreter during execution. The */
/* context is named `cur'. */
/* */
/* This version is non-reentrant, of course. */
/* */
/* b. indirect implementation */
/* */
/* The current execution context is passed to _each_ function as its */
/* first argument, and each field is thus accessed indirectly. */
/* */
/* This version is fully re-entrant. */
/* */
/* The idea is that an indirect implementation may be slower to execute */
/* on low-end processors that are used in some systems (like 386s or */
/* even 486s). */
/* */
/* As a consequence, the indirect implementation is now the default, as */
/* its performance costs can be considered negligible in our context. */
/* Note, however, that we kept the same source with macros because: */
/* */
/* - The code is kept very close in design to the Pascal code used for */
/* development. */
/* */
/* - It's much more readable that way! */
/* */
/* - It's still open to experimentation and tuning. */
/* */
/*************************************************************************/
# ifndef TT_CONFIG_OPTION_STATIC_INTERPRETER /* indirect implementation */
/*************************************************************************/
/* */
/* This macro is used whenever `exec' is unused in a function, to avoid */
@ -99,19 +60,6 @@
/* */
# define FT_UNUSED_EXEC FT_UNUSED( exc )
# else /* static implementation */
# define FT_UNUSED_EXEC int __dummy = __dummy
static
TT_ExecContextRec cur ; /* static exec. context variable */
/* apparently, we have a _lot_ of direct indexing when accessing */
/* the static `cur', which makes the code bigger (due to all the */
/* four bytes addresses). */
# endif /* TT_CONFIG_OPTION_STATIC_INTERPRETER */
/*************************************************************************/
/* */
@ -8221,13 +8169,6 @@
# endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
# ifdef TT_CONFIG_OPTION_STATIC_RASTER
if ( ! exc )
return FT_THROW ( Invalid_Argument ) ;
cur = * exc ;
# endif
# ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
exc - > iup_called = FALSE ;
# endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
@ -8981,22 +8922,12 @@
} while ( ! exc - > instruction_trap ) ;
LNo_Error_ :
# ifdef TT_CONFIG_OPTION_STATIC_RASTER
* exc = cur ;
# endif
return FT_Err_Ok ;
LErrorCodeOverflow_ :
exc - > error = FT_THROW ( Code_Overflow ) ;
LErrorLabel_ :
# ifdef TT_CONFIG_OPTION_STATIC_RASTER
* exc = cur ;
# endif
/* If any errors have occurred, function tables may be broken. */
/* Force a re-execution of `prep' and `fpgm' tables if no */
/* bytecode debugger is run. */
Werner Lemberg
10 years ago