972
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1003
1004
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1016
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labelptr=0;
}
static int parse_pattern(int cla,int ptr,Hash*hash) {
Class*cl=classes[cla];
Uint8 depth=0;
Uint16 nest[32];
int x,y;
for(;;) {
nxttok();
if(Tokenf(TF_MACRO)) ParseError("Unexpected macro\n");
if(Tokenf(TF_DIR)) {
cl->codes[ptr++]=tokenv&15;
} else if(Tokenf(TF_NAME)) {
switch(tokenv) {
case OP_ADD: case OP_CLIMB: case OP_EIGHT: case OP_FOUR:
case OP_HEIGHT: case OP_LOC: case OP_MARK: case OP_SUB:
case OP_DIR: case OP_DIR_C: case OP_DIR_E: case OP_DIR_EC:
case 0x0200 ... 0x02FF: // message
case 0x4000 ... 0x7FFF: // class
case 0xC000 ... 0xFFFF: // message
cl->codes[ptr++]=tokenv;
break;
case OP_BEGIN: case OP_IF:
if(depth==31) ParseError("Too much pattern nesting\n");
nest[depth++]=ptr;
cl->codes[ptr++]=tokenv;
cl->codes[ptr++]=0;
break;
case OP_ELSE:
if(!depth) ParseError("Premature end of subpattern\n");
cl->codes[nest[depth-1]+1]=ptr;
cl->codes[ptr++]=cl->codes[nest[depth-1]];
cl->codes[nest[depth-1]]=OP_ELSE;
cl->codes[ptr++]=0;
break;
case OP_THEN:
if(!depth) ParseError("Premature end of subpattern\n");
cl->codes[nest[--depth]+1]=ptr;
break;
case OP_AGAIN:
if(!depth) ParseError("Premature end of subpattern\n");
cl->codes[ptr++]=OP_GOTO;
cl->codes[ptr++]=nest[depth-1];
cl->codes[nest[--depth]+1]=ptr;
break;
case OP_USERFLAG:
x=look_hash(glohash,HASH_SIZE,0x1000,0x10FF,0,"user flags");
if(!x) ParseError("User flag ^%s not defined\n",tokenstr);
if(Tokenf(TF_COMMA)) x+=0x100;
if(Tokenf(TF_EQUAL)) ParseError("Improper token in pattern\n");
cl->codes[ptr++]=x;
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972
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1021
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1024
1025
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labelptr=0;
}
static int parse_pattern(int cla,int ptr,Hash*hash) {
Class*cl=classes[cla];
Uint8 depth=0;
Uint16 nest[32];
Uint16 nest0[32];
int x,y;
for(;;) {
nxttok();
if(Tokenf(TF_MACRO)) ParseError("Unexpected macro\n");
if(Tokenf(TF_DIR)) {
cl->codes[ptr++]=tokenv&15;
} else if(Tokenf(TF_NAME)) {
switch(tokenv) {
case OP_ADD: case OP_CLIMB: case OP_EIGHT: case OP_FOUR:
case OP_HEIGHT: case OP_LOC: case OP_MARK: case OP_SUB:
case OP_DIR: case OP_DIR_C: case OP_DIR_E: case OP_DIR_EC:
case OP_OBJTOPAT: case OP_OBJBOTTOMAT: case OP_CUT: case OP_MUL:
case OP_OBJABOVE: case OP_OBJBELOW: case OP_TRACE:
case 0x0200 ... 0x02FF: // message
case 0x4000 ... 0x7FFF: // class
case 0xC000 ... 0xFFFF: // message
cl->codes[ptr++]=tokenv;
break;
case OP_BEGIN: case OP_IF:
if(depth==31) ParseError("Too much pattern nesting\n");
nest0[depth]=nest[depth]=ptr;
cl->codes[ptr++]=tokenv;
cl->codes[ptr++]=0;
depth++;
break;
case OP_ELSE:
if(!depth) ParseError("Premature end of subpattern\n");
cl->codes[nest[depth-1]+1]=ptr;
cl->codes[ptr++]=OP_ELSE;
cl->codes[ptr++]=cl->codes[nest[depth-1]];
cl->codes[nest[depth-1]]=OP_IF;
cl->codes[ptr++]=0;
break;
case OP_THEN:
if(!depth) ParseError("Premature end of subpattern\n");
cl->codes[nest[--depth]+1]=ptr;
cl->codes[ptr++]=OP_THEN;
break;
case OP_AGAIN:
if(!depth) ParseError("Premature end of subpattern\n");
cl->codes[ptr++]=OP_AGAIN;
cl->codes[ptr++]=nest0[depth-1];
cl->codes[nest[--depth]+1]=ptr;
cl->codes[ptr++]=OP_THEN;
break;
case OP_USERFLAG:
x=look_hash(glohash,HASH_SIZE,0x1000,0x10FF,0,"user flags");
if(!x) ParseError("User flag ^%s not defined\n",tokenstr);
if(Tokenf(TF_COMMA)) x+=0x100;
if(Tokenf(TF_EQUAL)) ParseError("Improper token in pattern\n");
cl->codes[ptr++]=x;
|