Free Hero Mesh

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sqlite3.h"
#include "smallxrm.h"
#include "heromesh.h"

#define TF_COMMA 0x0001 // has a comma modifier
#define TF_EQUAL 0x0002 // has an equal sign modifier
#define TF_ABNORMAL 0x0004 // with TF_NAME, not directly an opcode
#define TF_COMPAT 0x0008 // add 1 to opcode in compatibility mode
#define TF_DIR 0x0010 // token is a direction
#define TF_DROP 0x0020 // add 0x2000 to opcode if followed by OP_DROP
#define TF_NAME 0x0080 // token is a name or opcode
#define TF_KEY 0x0100 // token is a Hero Mesh key name
#define TF_OPEN 0x0400 // token is (
#define TF_CLOSE 0x0800 // token is )
#define TF_INT 0x1000 // token is a number
#define TF_FUNCTION 0x2000 // token is a user function
#define TF_MACRO 0x4000 // token is a macro; never returned by nxttok()
#define TF_EOF 0x8000 // end of file
typedef struct {
  const char*txt;
  Uint32 num;
} Op_Names;
#include "instruc.h"
#define Tokenf(x) (tokent&(x))

Class*classes[0x4000];
const char*messages[0x4000];
Uint16 functions[0x4000];
int max_animation=32;
Sint32 max_volume=10000;

#define HASH_SIZE 8888
#define LOCAL_HASH_SIZE 5555
typedef struct {
  Uint16 id;
  char*txt;
} Hash;

static FILE*classfp;
static Uint16 tokent;
static Uint32 tokenv;
static int linenum=1;
static char tokenstr[0x2000];
static int undef_class=1;
static int undef_message=0;
static int num_globals=0;
static int num_functions=0;
static Hash*glohash;

#define ParseError(a,...) fatal("On line %d: " a,linenum,##__VA_ARGS__)

static const unsigned char chkind[256]={
  ['$']=1, ['!']=1, ['\'']=1, ['#']=1, ['@']=1, ['%']=1, ['&']=1, [':']=1,
  ['0'...'9']=2, ['-']=2, ['+']=2,
  ['A'...'Z']=3, ['a'...'z']=3, ['_']=3, ['?']=3, ['.']=3, ['*']=3, ['/']=3,
};

#define MIN_VERSION 0
#define MAX_VERSION 0

static void read_quoted_string(void) {
  int c,i,n;
  int isimg=0;
  for(i=0;i<0x1FFD;) {
    c=fgetc(classfp);
    if(c==EOF) {

  }
  if(u==0x4000) ParseError("Too many message names; cannot add #%s",tokenstr);
  if(u==undef_message) ++undef_message;
  messages[u]=strdup(tokenstr);
  if(!messages[u]) fatal("Allocation failed\n");
  return u;
}

static Uint16 look_hash(Hash*tbl,int size,Uint16 minv,Uint16 maxv,Uint16 newv,const char*err) {
  int h,i,m;
  for(h=i=0;tokenstr[i];i++) h=(13*h+tokenstr[i])%size;
  m=h;
  for(;;) {
    if(tbl[h].id>=minv && tbl[h].id<=maxv && !strcmp(tokenstr,tbl[h].txt)) return tbl[h].id;
    if(!tbl[h].id) {
      if(newv>maxv) ParseError("Too many %s\n",err);
      tbl[h].txt=strdup(tokenstr);
      if(!tbl[h].txt) ParseError("Out of string space in hash table\n");
      tbl[h].id=newv;
      return 0;
    }
    h=(h+1)%size;
    if(h==m) ParseError("Hash table full\n");
  }
}

#define ReturnToken(x,y) do{ tokent=x; tokenv=y; return; }while(0)
static void nxttok(void) {
  int c,i,fl,n,pr;


  fl=n=pr=0;
  tokent=tokenv=0;
  *tokenstr=0;
again:
  c=fgetc(classfp);
  while(c==' ' || c=='\t' || c=='\r' || c=='\n') {
    if(c=='\n') ++linenum;
    c=fgetc(classfp);

      // Just ignore sounds for now
      if(fl) ParseError("Invalid use of , and = in token\n");
      tokent=TF_NAME;
      tokenv=0x0400;
      break;
    case '%':
      if(fl&TF_COMMA) ParseError("Invalid use of , in token\n");
      tokent=TF_NAME|TF_ABNORMAL|fl;
      tokenv=OP_LOCAL;
      break;
    case '@':
      if(fl&TF_COMMA) ParseError("Invalid use of , in token\n");
      tokent=TF_NAME|fl;
      tokenv=look_hash(glohash,HASH_SIZE,0x2800,0x2FFF,num_globals+0x2800,"user global variables")?:(num_globals++)+0x2800;
      break;
    case '#':
      if(fl) ParseError("Invalid use of , and = in token\n");
      tokent=TF_NAME;
      tokenv=look_message_name()+0xC000;
      break;
    case ':':
      tokent=TF_NAME|TF_ABNORMAL|fl;
      tokenv=OP_LABEL;
      break;
    case '&':
      if(fl) ParseError("Invalid use of , and = in token\n");
      tokent=TF_FUNCTION|TF_ABNORMAL;
      tokenv=look_hash(glohash,HASH_SIZE,0x8000,0xBFFF,num_functions,"user functions")?:(num_functions++)+0x8000;
      break;
    case '\'':
      if(fl) ParseError("Invalid use of , and = in token\n");
      tokent=TF_NAME|TF_KEY;
      for(i=8;i<256;i++) {
        if(heromesh_key_names[i] && !strcmp(heromesh_key_names[i],tokenstr)) {
          tokenv=i;
          return;
        }
      }
      ParseError("Invalid Hero Mesh key name: %s\n",tokenstr);
      break;
  }
}

void load_classes(void) {
  int i;
  char*nam=sqlite3_mprintf("%s.class",basefilename);
  if(!nam) fatal("Allocation failed\n");
  classfp=fopen(nam,"r");
  sqlite3_free(nam);
  if(!classfp) fatal("Cannot open class file '%s': %m\n",nam);
  glohash=calloc(HASH_SIZE,sizeof(Hash));
  if(!glohash) fatal("Allocation failed\n");
  if(main_options['L']) {
    for(;;) {
      nxttok();
      printf("** %5d %04X %08X \"",linenum,tokent,tokenv);
      for(i=0;tokenstr[i];i++) {
        if(tokenstr[i]<32 || tokenstr[i]>126) printf("<%02X>",tokenstr[i]&255);
        else putchar(tokenstr[i]);
      }
      printf("\"\n");
      if(Tokenf(TF_EOF)) goto done;
    }
  }
  
  done:
  fclose(classfp);
  for(i=0;i<HASH_SIZE;i++) free(glohash[i].txt);
  free(glohash);
  for(i=1;i<undef_class;i++) if(classes[i] && (classes[i]->cflags&CF_NOCLASS1)) fatal("Class $%s mentioned but not defined",classes[i]->name);
}