[truetype] Add rudimentary tracing for bytecode instructions.

* src/truetype/ttinterp.c (opcode_name) [FT_DEBUG_LEVEL_TRACE]: New
array.
(TT_RunIns): Trace opcodes.

ChangeLog

@@ -1,3 +1,11 @@
+2010-07-01  Werner Lemberg  <wl@gnu.org>
+
+	[truetype] Add rudimentary tracing for bytecode instructions.
+
+	* src/truetype/ttinterp.c (opcode_name) [FT_DEBUG_LEVEL_TRACE]: New
+	array.
+	(TT_RunIns): Trace opcodes.
+
 2010-06-30  Werner Lemberg  <wl@gnu.org>
 
 	Fix Savannah bug #30263.

src/truetype/ttinterp.c

@@ -1112,6 +1112,287 @@
   };
 
 
+#ifdef FT_DEBUG_LEVEL_TRACE
+
+  static
+  const char*  const opcode_name[256] =
+  {
+    "SVTCA y",
+    "SVTCA x",
+    "SPvTCA y",
+    "SPvTCA x",
+    "SFvTCA y",
+    "SFvTCA x",
+    "SPvTL ||",
+    "SPvTL +",
+    "SFvTL ||",
+    "SFvTL +",
+    "SPvFS",
+    "SFvFS",
+    "GPV",
+    "GFV",
+    "SFvTPv",
+    "ISECT",
+
+    "SRP0",
+    "SRP1",
+    "SRP2",
+    "SZP0",
+    "SZP1",
+    "SZP2",
+    "SZPS",
+    "SLOOP",
+    "RTG",
+    "RTHG",
+    "SMD",
+    "ELSE",
+    "JMPR",
+    "SCvTCi",
+    "SSwCi",
+    "SSW",
+
+    "DUP",
+    "POP",
+    "CLEAR",
+    "SWAP",
+    "DEPTH",
+    "CINDEX",
+    "MINDEX",
+    "AlignPTS",
+    "INS_$28",
+    "UTP",
+    "LOOPCALL",
+    "CALL",
+    "FDEF",
+    "ENDF",
+    "MDAP[0]",
+    "MDAP[1]",
+
+    "IUP[0]",
+    "IUP[1]",
+    "SHP[0]",
+    "SHP[1]",
+    "SHC[0]",
+    "SHC[1]",
+    "SHZ[0]",
+    "SHZ[1]",
+    "SHPIX",
+    "IP",
+    "MSIRP[0]",
+    "MSIRP[1]",
+    "AlignRP",
+    "RTDG",
+    "MIAP[0]",
+    "MIAP[1]",
+
+    "NPushB",
+    "NPushW",
+    "WS",
+    "RS",
+    "WCvtP",
+    "RCvt",
+    "GC[0]",
+    "GC[1]",
+    "SCFS",
+    "MD[0]",
+    "MD[1]",
+    "MPPEM",
+    "MPS",
+    "FlipON",
+    "FlipOFF",
+    "DEBUG",
+
+    "LT",
+    "LTEQ",
+    "GT",
+    "GTEQ",
+    "EQ",
+    "NEQ",
+    "ODD",
+    "EVEN",
+    "IF",
+    "EIF",
+    "AND",
+    "OR",
+    "NOT",
+    "DeltaP1",
+    "SDB",
+    "SDS",
+
+    "ADD",
+    "SUB",
+    "DIV",
+    "MUL",
+    "ABS",
+    "NEG",
+    "FLOOR",
+    "CEILING",
+    "ROUND[0]",
+    "ROUND[1]",
+    "ROUND[2]",
+    "ROUND[3]",
+    "NROUND[0]",
+    "NROUND[1]",
+    "NROUND[2]",
+    "NROUND[3]",
+
+    "WCvtF",
+    "DeltaP2",
+    "DeltaP3",
+    "DeltaCn[0]",
+    "DeltaCn[1]",
+    "DeltaCn[2]",
+    "SROUND",
+    "S45Round",
+    "JROT",
+    "JROF",
+    "ROFF",
+    "INS_$7B",
+    "RUTG",
+    "RDTG",
+    "SANGW",
+    "AA",
+
+    "FlipPT",
+    "FlipRgON",
+    "FlipRgOFF",
+    "INS_$83",
+    "INS_$84",
+    "ScanCTRL",
+    "SDVPTL[0]",
+    "SDVPTL[1]",
+    "GetINFO",
+    "IDEF",
+    "ROLL",
+    "MAX",
+    "MIN",
+    "ScanTYPE",
+    "InstCTRL",
+    "INS_$8F",
+
+    "INS_$90",
+    "INS_$91",
+    "INS_$92",
+    "INS_$93",
+    "INS_$94",
+    "INS_$95",
+    "INS_$96",
+    "INS_$97",
+    "INS_$98",
+    "INS_$99",
+    "INS_$9A",
+    "INS_$9B",
+    "INS_$9C",
+    "INS_$9D",
+    "INS_$9E",
+    "INS_$9F",
+
+    "INS_$A0",
+    "INS_$A1",
+    "INS_$A2",
+    "INS_$A3",
+    "INS_$A4",
+    "INS_$A5",
+    "INS_$A6",
+    "INS_$A7",
+    "INS_$A8",
+    "INS_$A9",
+    "INS_$AA",
+    "INS_$AB",
+    "INS_$AC",
+    "INS_$AD",
+    "INS_$AE",
+    "INS_$AF",
+
+    "PushB[0]",
+    "PushB[1]",
+    "PushB[2]",
+    "PushB[3]",
+    "PushB[4]",
+    "PushB[5]",
+    "PushB[6]",
+    "PushB[7]",
+    "PushW[0]",
+    "PushW[1]",
+    "PushW[2]",
+    "PushW[3]",
+    "PushW[4]",
+    "PushW[5]",
+    "PushW[6]",
+    "PushW[7]",
+
+    "MDRP[00]",
+    "MDRP[01]",
+    "MDRP[02]",
+    "MDRP[03]",
+    "MDRP[04]",
+    "MDRP[05]",
+    "MDRP[06]",
+    "MDRP[07]",
+    "MDRP[08]",
+    "MDRP[09]",
+    "MDRP[10]",
+    "MDRP[11]",
+    "MDRP[12]",
+    "MDRP[13]",
+    "MDRP[14]",
+    "MDRP[15]",
+
+    "MDRP[16]",
+    "MDRP[17]",
+    "MDRP[18]",
+    "MDRP[19]",
+    "MDRP[20]",
+    "MDRP[21]",
+    "MDRP[22]",
+    "MDRP[23]",
+    "MDRP[24]",
+    "MDRP[25]",
+    "MDRP[26]",
+    "MDRP[27]",
+    "MDRP[28]",
+    "MDRP[29]",
+    "MDRP[30]",
+    "MDRP[31]",
+
+    "MIRP[00]",
+    "MIRP[01]",
+    "MIRP[02]",
+    "MIRP[03]",
+    "MIRP[04]",
+    "MIRP[05]",
+    "MIRP[06]",
+    "MIRP[07]",
+    "MIRP[08]",
+    "MIRP[09]",
+    "MIRP[10]",
+    "MIRP[11]",
+    "MIRP[12]",
+    "MIRP[13]",
+    "MIRP[14]",
+    "MIRP[15]",
+
+    "MIRP[16]",
+    "MIRP[17]",
+    "MIRP[18]",
+    "MIRP[19]",
+    "MIRP[20]",
+    "MIRP[21]",
+    "MIRP[22]",
+    "MIRP[23]",
+    "MIRP[24]",
+    "MIRP[25]",
+    "MIRP[26]",
+    "MIRP[27]",
+    "MIRP[28]",
+    "MIRP[29]",
+    "MIRP[30]",
+    "MIRP[31]"
+  };
+
+#endif /* FT_DEBUG_LEVEL_TRACE */
+
+
   static
   const FT_Char  opcode_length[256] =
   {
@@ -4571,7 +4852,7 @@
     }
 
     def->opc    = (FT_Byte)args[0];
-    def->start  = CUR.IP+1;
+    def->start  = CUR.IP + 1;
     def->range  = CUR.curRange;
     def->active = TRUE;
 
@@ -6773,7 +7054,7 @@
         call = CUR.callStack + CUR.callTop++;
 
         call->Caller_Range = CUR.curRange;
-        call->Caller_IP    = CUR.IP+1;
+        call->Caller_IP    = CUR.IP + 1;
         call->Cur_Count    = 1;
         call->Cur_Restart  = def->start;
 
@@ -7142,6 +7423,10 @@
     {
       CUR.opcode = CUR.code[CUR.IP];
 
+      FT_TRACE7(( "  " ));
+      FT_TRACE7(( opcode_name[CUR.opcode] ));
+      FT_TRACE7(( "\n" ));
+
       if ( ( CUR.length = opcode_length[CUR.opcode] ) < 0 )
       {
         if ( CUR.IP + 1 > CUR.codeSize )