Free Hero Mesh

#define MAC_MOD 0xFFC4
#define MAC_BAND 0xFFC5
#define MAC_BOR 0xFFC6
#define MAC_BXOR 0xFFC7
#define MAC_BNOT 0xFFC8
#define MAC_CAT 0xFFC9
#define MAC_BIT 0xFFCA
#define MAC_MAKE 0xFFCB
#define MAC_VERSION 0xFFE0
#define MAC_DEFINE 0xFFE1
#define MAC_INCLUDE 0xFFE2
#define MAC_CALL 0xFFE3
#define MAC_APPEND 0xFFE4
#define MAC_UNDEFINED 0xFFFF

  int c,i,fl,n,pr;
  magain: if(macstack) {
    TokenList*tl=0;
    pr=0;
    tokent=macstack->tok->t;
    if(tokent&TF_EOF) ParseError("Unexpected end of file in macro expansion\n");
    tokenv=macstack->tok->v;
    if(tokent!=(TF_MACRO|TF_CLOSE)) *tokenstr=0;
    if(macstack->tok->str) strcpy(tokenstr,macstack->tok->str);
    if(main_options['M']) {
      printf("M* Macro %04X %08X \"",tokent,tokenv);
      for(i=0;tokenstr[i];i++) {
        if(tokenstr[i]<32 || tokenstr[i]>126) printf("<%02X>",tokenstr[i]&255);
        else putchar(tokenstr[i]);
      }

            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokenv<32) n|=1<<tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_MAKE:
          nxttok();
          if(!(tokent&TF_NAME) || tokenv!=OP_STRING) ParseError("String literal expected\n");
          s=tokenstr;
          n=0;
          while(*s) switch(*s++) {
            case '=': n|=0x0001; break;
            case ',': n|=0x0002; break;
            case ':': n|=0x0004; break;
            case '@': n|=0x0008; break;
            case '%': n|=0x0010; break;
            case '#': n|=0x0020; break;
            case '$': n|=0x0040; break;
            case '&': n|=0x0080; break;
            case '^': n|=0x0100; break;
            case '\'': n|=0x0400; break;
            case 'D': n|=0x0800; break;
            case '+': n|=0x1000; break;
            case 'C': n|=0x2000; break;
            case 'A': n|=0x4000; break;
            case '!': n|=0x8000; break;
            default: ParseError("Incorrect mode of {make}\n");
          }
          nxttok();
          if(tokent==TF_INT || ((tokent&TF_NAME) && !(tokenv&~255))) {
            n|=0x10000;
            snprintf(tokenstr,32,"%llu",(long long)tokenv);
          } else if(!(tokent&TF_NAME) || tokenv!=OP_STRING) {
            ParseError("Numeric or string literal expected\n");
          }
          s=strdup(tokenstr);
          if(!s) fatal("Allocation failed\n");
          nxttok();
          strcpy(tokenstr,s);
          free(s);
          if(tokent!=TF_MACRO+TF_CLOSE) ParseError("Too many macro arguments\n");
          if(n&0x10000) {
            n&=0xFFFF;
            tokent=TF_INT;
            tokenv=strtol(tokenstr,0,10);
          }
          switch(n) {
            case 0x0004: // :
              ReturnToken(TF_NAME|TF_ABNORMAL,OP_LABEL);
            case 0x0005: // =:
              ReturnToken(TF_NAME|TF_ABNORMAL|TF_EQUAL,OP_LABEL);
            case 0x0006: // ,:
              ReturnToken(TF_NAME|TF_ABNORMAL|TF_COMMA,OP_LABEL);
            case 0x0008: // @
              tokent=TF_NAME;
              tokenv=look_hash(glohash,HASH_SIZE,0x2800,0x2FFF,num_globals+0x2800,"user global variables")?:(num_globals++)+0x2800;
              return;
            case 0x0009: // =@
              tokent=TF_NAME|TF_EQUAL;
              tokenv=look_hash(glohash,HASH_SIZE,0x2800,0x2FFF,num_globals+0x2800,"user global variables")?:(num_globals++)+0x2800;
              return;
            case 0x0010: // %
              ReturnToken(TF_NAME|TF_ABNORMAL,OP_LOCAL);
            case 0x0011: // =%
              ReturnToken(TF_NAME|TF_ABNORMAL|TF_EQUAL,OP_LOCAL);
            case 0x0020: // #
              tokent=TF_NAME;
              tokenv=look_message_name()+0xC000;
              return;
            case 0x0040: // $
              tokent=TF_NAME;
              tokenv=look_class_name()+0x4000;
              return;
            case 0x0080: // &
              tokent=TF_FUNCTION|TF_ABNORMAL;
              tokenv=look_hash(glohash,HASH_SIZE,0x8000,0xBFFF,num_functions+0x8000,"user functions")?:(num_functions++)+0x8000;
              return;
            case 0x0100: // ^
              ReturnToken(TF_NAME|TF_ABNORMAL,OP_USERFLAG);
            case 0x0101: // =^
              ReturnToken(TF_NAME|TF_ABNORMAL|TF_EQUAL,OP_USERFLAG);
            case 0x0102: // ,^
              ReturnToken(TF_NAME|TF_ABNORMAL|TF_COMMA,OP_USERFLAG);
            case 0x0103: // =,^
              ReturnToken(TF_NAME|TF_ABNORMAL|TF_EQUAL|TF_COMMA,OP_USERFLAG);
            case 0x0400: // '
              if(tokent==TF_INT) {
                n=tokenv;
              } else {
                for(n=8;n<256;n++) if(heromesh_key_names[n] && !strcmp(heromesh_key_names[n],tokenstr)) break;
              }
              if(!heromesh_key_names[n&=255]) ParseError("Invalid key token (%d)\n",n);
              ReturnToken(TF_NAME|TF_KEY,n);
            case 0x0800: // D
              if(tokent==TF_INT) ReturnToken(TF_NAME|TF_DIR,tokenv&15);
              else ReturnToken(TF_NAME|TF_DIR,strtol(tokenstr,0,10)&15);
            case 0x1000: // +
              ReturnToken(TF_INT,strtol(tokenstr,0,10));
            case 0x1001: // =+
              ReturnToken(TF_INT,strtol(tokenstr,0,2));
            case 0x1002: // ,+
              ReturnToken(TF_INT,strtol(tokenstr,0,16));
            case 0x1003: // =,+
              ReturnToken(TF_INT,strtol(tokenstr,0,8));
            case 0x2000: // C
              if(tokent!=TF_INT) tokenv=strtol(tokenstr,0,10);
              *tokenstr=n=tokenv&255;
              if(n<32) tokenstr[0]=31,tokenstr[1]=n,tokenstr[2]=0; else tokenstr[1]=0;
              ReturnToken(TF_NAME|TF_ABNORMAL,OP_STRING);
            case 0x2002: // ,C
              if(tokent!=TF_INT) tokenv=strtol(tokenstr,0,10);
              if(n<32) {
                *tokenstr=0;
              } else {
                tokenstr[0]=16;
                tokenstr[1]=n;
                tokenstr[2]=0;
              }
              ReturnToken(TF_NAME|TF_ABNORMAL,OP_STRING);
            case 0x4000: // A
              ReturnToken(TF_INT,*tokenstr&255);
            default: ParseError("Incorrect mode of {make}\n");
          }
          break;
        case MAC_VERSION:
          nxttok1();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokenv<MIN_VERSION || tokenv>MAX_VERSION) ParseError("Version number out of range\n");
          nxttok1();
          if(tokent!=TF_MACRO+TF_CLOSE) ParseError("Too many macro arguments\n");

  strcpy(tokenstr,"mod"); glohash[look_hash_mac()].id=MAC_MOD;
  strcpy(tokenstr,"band"); glohash[look_hash_mac()].id=MAC_BAND;
  strcpy(tokenstr,"bor"); glohash[look_hash_mac()].id=MAC_BOR;
  strcpy(tokenstr,"bxor"); glohash[look_hash_mac()].id=MAC_BXOR;
  strcpy(tokenstr,"bnot"); glohash[look_hash_mac()].id=MAC_BNOT;
  strcpy(tokenstr,"cat"); glohash[look_hash_mac()].id=MAC_CAT;
  strcpy(tokenstr,"bit"); glohash[look_hash_mac()].id=MAC_BIT;
  strcpy(tokenstr,"make"); glohash[look_hash_mac()].id=MAC_MAKE;
  strcpy(tokenstr,"version"); glohash[look_hash_mac()].id=MAC_VERSION;
  strcpy(tokenstr,"define"); glohash[look_hash_mac()].id=MAC_DEFINE;
  strcpy(tokenstr,"include"); glohash[look_hash_mac()].id=MAC_INCLUDE;
  strcpy(tokenstr,"call"); glohash[look_hash_mac()].id=MAC_CALL;
  strcpy(tokenstr,"append"); glohash[look_hash_mac()].id=MAC_APPEND;
  if(main_options['L']) {
    for(;;) {

  with multiple tokens becomes the token with one less backslash. It is
  permitted to redefine existing macros as well as new ones.

{include <string>}
  Include text from another file into this one. You cannot use {include}
  inside of another macro or in a macro argument.

{make <mode> <arg>}
  Make a synthetic token; see the below section about synthetic tokens for
  details. The second argument can be a number, or a direction or key name
  which is treated as a number, or a string. In most cases, a number will
  be converted to a string with its unsigned decimal representation.

{mod <number> <number>}
  Modulo.

{version <number>}
  Expands into nothing. The number must be zero, otherwise it is an error.
  Future versions of Free Hero Mesh may change this.

It is possible to implement a tag system in this preprocessor, which makes
it Turing complete. For example:

  {define "skip" {call \2}}
  {define "1" {skip \1|"3"|"3"|"2"|"1"|"H"}}
  {define "2" {skip \1|"3"|"3"|"1"}}
  {define "3" {skip \1|"3"|"3"}}
  {define "H" \1}
  {call "2"|"1"|"1"}

Note: Macro names are entirely independent from token names.


=== Synthetic tokens ===

The possible modes of synthetic tokens are:

 ":"    A label with the specified name.
 "=:"   Go to a label with a specified name.
 ",:"   Subroutine call a label with a specified name.
 "@"    A global variable.
 "=@"   Write a global variable.
 "%"    A local variable.
 "=%"   Write a local variable.
 "#"    A user-defined message.
 "$"    A class.
 "&"    A user-defined function.
 "^"    A user flag (read self, or definition).
 "=^"   A user flag (write self).
 ",^"   A user flag (read object).
 "=,^"  A user flag (write object).
 "'"    A key token; either by number or by name.
 "D"    A direction; only the low 4-bits are used.
 "+"    A number interpreted as decimal.
 "=+"   A number interpreted as binary.
 ",+"   A number interpreted as hexadecimal.
 "=,+"  A number interpreted as octal.
 "C"    A string with a single character of the specified code.
 ",C"   A string with a quiz button of the character with the code.
 "A"    The ASCII code of the first character of the string.

Note that as the argument, you can use {cat} to convert other tokens
to strings if needed.


=== Global definitions ===

These are the global definitions in the class definition file.

(Animate <limit>)
  Set the limit for logical animations, from 1 to 255. The default is 32.