Free Hero Mesh

heromesh.h: Contains structures, macros, and function and variables for
Free Hero Mesh, which can be used by multiple files.

game.c: The game play. The game behaviour is implemented in exec.c; this
one just handles the input and display, and solution replay, and any move
which is made calls exec.c to execute the mode. It contains one function
(locate_me) which is called by exec.c.

hash.c,hash.h: A set of functions for computing cryptographic hashes.
These functions can be used outside of Free Hero Mesh, too. If you want
to add new algorithms, use the multicodec table to assign the numbers.
(Currently they are not used for anything, but some planned features may
use it in future.)

instruc,instruc.h,instruc.js: The "instruc" file contains a list of the
keywords and internal operator names used in the class definitions. Some
of these are only used internally, although most are available directly
as keywords. Many are also opcodes in the compiled P-code, although some
are only used as keywords, which are handled during class loading. The
instruc.js program generates instruc.h from instruc.

#!/bin/bash --
set -e
if test "$1" = "p"; then
  echo 'Using portable mode.'
  test -d bin || mkdir bin
  export EXE=bin/heromesh
  test -e bin/current.heromeshrc || cp default.heromeshrc bin/current.heromeshrc
fi
test -f CFLAGS || echo xxx > CFLAGS
test "xx$CFLAGS" = "x`cat CFLAGS`" || rm bindings.o class.o picture.o function.o exec.o game.o edit.o picedit.o || true
test "xx$CFLAGS" = "x`cat CFLAGS`" || rm bindings.o class.o picture.o function.o exec.o game.o edit.o picedit.o hash.o || true
echo "x$CFLAGS" > CFLAGS
test "x$EXE" = "x" && export EXE=~/bin/heromesh
echo 'Flags: ' "$CFLAGS"
echo 'Target filename: ' "$EXE"
test instruc -nt instruc.h && node instruc.js > instruc.h
test instruc.js -nt instruc.h && node instruc.js > instruc.h
test names.js -nt names.h && node names.js > names.h
test quarks -nt quarks.h && node quarks.js > quarks.h
test quarks.js -nt quarks.h && node quarks.js > quarks.h
test heromesh.h -nt "$EXE" && rm bindings.o class.o picture.o function.o exec.o game.o edit.o picedit.o || true
test instruc.h -nt "$EXE" && rm class.o exec.o || true
test pcfont.h -nt "$EXE" && rm picture.o || true
test quarks.h -nt "$EXE" && rm bindings.o edit.o exec.o game.o picture.o picedit.o || true
test hash.h -nt "$EXE" && rm hash.o function.o || true
echo '* smallxrm'
test smallxrm.c -nt smallxrm.o && bash smallxrm.c
echo '* bindings'
test bindings.c -nt bindings.o && bash bindings.c
echo '* class'
test class.c -nt class.o && bash class.c
echo '* function'
test function.c -nt function.o && bash function.c
echo '* picture'
test picture.c -nt picture.o && bash picture.c
echo '* exec'
test exec.c -nt exec.o && bash exec.c
echo '* game'
test game.c -nt game.o && bash game.c
echo '* edit'
test edit.c -nt edit.o && bash edit.c
echo '* picedit'
test picedit.c -nt picedit.o && bash picedit.c
echo '* hash'
test hash.c -nt hash.o && bash hash.c
echo '* main'
bash main.c
echo 'DONE'

#include <stdlib.h>
#include <string.h>
#include "sqlite3.h"
#include "smallxrm.h"
#include "heromesh.h"
#include "cursorshapes.h"
#include "instruc.h"
#include "hash.h"

typedef struct {
  struct sqlite3_vtab_cursor;
  sqlite3_int64 rowid;
  char unique,eof;
  Uint16 arg[4];
} Cursor;

    return;
  } else {
    a=sqlite3_value_int(*argv)&0xFFFF;
    if(!a || (a&~0x3FFF) || !classes[a] || (classes[a]->cflags&CF_NOCLASS2)) return;
  }
  found: sqlite3_result_int64(cxt,a|((sqlite3_int64)TY_CLASS<<32));
}

static void fn_hash(sqlite3_context*cxt,int argc,sqlite3_value**argv) {
  const unsigned char*u=sqlite3_value_blob(*argv);
  int n=sqlite3_value_bytes(*argv);
  long long h=sqlite3_value_int64(argv[1]);
  int m=hash_length(h);
  if(sqlite3_value_type(*argv)==SQLITE_NULL || !m) return;
  sqlite3_result_blob(cxt,hash_buffer(h,u,n),m,free);
}

static void fn_heromesh_escape(sqlite3_context*cxt,int argc,sqlite3_value**argv) {
  const unsigned char*u=sqlite3_value_blob(*argv);
  int un=sqlite3_value_bytes(*argv);
  char*e;
  int en=0;
  int i=0;

void init_sql_functions(sqlite3_int64*ptr0,sqlite3_int64*ptr1) {
  sqlite3_create_function(userdb,"BASENAME",0,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_basename,0,0);
  sqlite3_create_function(userdb,"BCAT",-1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_bcat,0,0);
  sqlite3_create_function(userdb,"BYTE",-1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_byte,0,0);
  sqlite3_create_function(userdb,"CL",1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_cl,0,0);
  sqlite3_create_function(userdb,"CLASS_DATA",2,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_class_data,0,0);
  sqlite3_create_function(userdb,"CVALUE",1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_cvalue,0,0);
  sqlite3_create_function(userdb,"HASH",2,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_hash,0,0);
  sqlite3_create_function(userdb,"HEROMESH_ESCAPE",1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_heromesh_escape,0,0);
  sqlite3_create_function(userdb,"HEROMESH_TYPE",1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_heromesh_type,0,0);
  sqlite3_create_function(userdb,"HEROMESH_UNESCAPE",1,SQLITE_UTF8|SQLITE_DETERMINISTIC,0,fn_heromesh_unescape,0,0);
  sqlite3_create_function(userdb,"INRECT",2,SQLITE_UTF8,0,fn_inrect,0,0);
  sqlite3_create_function(userdb,"LEVEL",0,SQLITE_UTF8,&level_ord,fn_level,0,0);
  sqlite3_create_function(userdb,"LEVEL_CACHEID",0,SQLITE_UTF8|SQLITE_DETERMINISTIC,ptr0,fn_cacheid,0,0);
  sqlite3_create_function(userdb,"LEVEL_ID",0,SQLITE_UTF8,&level_id,fn_level,0,0);

#if 0
gcc ${CFLAGS:--s -O2} -c -fwrapv hash.c
exit
#endif

/*
  Some of the code in this file is based on some code from SQLite.
  The original code and this code also is public domain.
*/

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "hash.h"

// ######## SHA-1 hash

/* Context for the SHA1 hash */
typedef struct SHA1Context SHA1Context;
struct SHA1Context {
  unsigned int state[5];
  unsigned int count[2];
  unsigned char buffer[64];
};

#define SHA_ROT(x,l,r) ((x) << (l) | (x) >> (r))
#define rol(x,k) SHA_ROT(x,k,32-(k))
#define ror(x,k) SHA_ROT(x,32-(k),k)

#define blk0le(i) (block[i] = (ror(block[i],8)&0xFF00FF00) \
    |(rol(block[i],8)&0x00FF00FF))
#define blk0be(i) block[i]
#define blk(i) (block[i&15] = rol(block[(i+13)&15]^block[(i+8)&15] \
    ^block[(i+2)&15]^block[i&15],1))

/*
 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
 *
 * Rl0() for little-endian and Rb0() for big-endian.  Endianness is
 * determined at run-time.
 */
#define Rl0(v,w,x,y,z,i) \
    z+=((w&(x^y))^y)+blk0le(i)+0x5A827999+rol(v,5);w=ror(w,2);
#define Rb0(v,w,x,y,z,i) \
    z+=((w&(x^y))^y)+blk0be(i)+0x5A827999+rol(v,5);w=ror(w,2);
#define R1(v,w,x,y,z,i) \
    z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=ror(w,2);
#define R2(v,w,x,y,z,i) \
    z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=ror(w,2);
#define R3(v,w,x,y,z,i) \
    z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=ror(w,2);
#define R4(v,w,x,y,z,i) \
    z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=ror(w,2);

/*
 * Hash a single 512-bit block. This is the core of the algorithm.
 */
static void SHA1Transform(unsigned int state[5], const unsigned char buffer[64]){
  unsigned int qq[5]; /* a, b, c, d, e; */
  static int one = 1;
  unsigned int block[16];
  memcpy(block, buffer, 64);
  memcpy(qq,state,5*sizeof(unsigned int));

#define a qq[0]
#define b qq[1]
#define c qq[2]
#define d qq[3]
#define e qq[4]

  /* Copy p->state[] to working vars */
  /*
  a = state[0];
  b = state[1];
  c = state[2];
  d = state[3];
  e = state[4];
  */

  /* 4 rounds of 20 operations each. Loop unrolled. */
  if( 1 == *(unsigned char*)&one ){
    Rl0(a,b,c,d,e, 0); Rl0(e,a,b,c,d, 1); Rl0(d,e,a,b,c, 2); Rl0(c,d,e,a,b, 3);
    Rl0(b,c,d,e,a, 4); Rl0(a,b,c,d,e, 5); Rl0(e,a,b,c,d, 6); Rl0(d,e,a,b,c, 7);
    Rl0(c,d,e,a,b, 8); Rl0(b,c,d,e,a, 9); Rl0(a,b,c,d,e,10); Rl0(e,a,b,c,d,11);
    Rl0(d,e,a,b,c,12); Rl0(c,d,e,a,b,13); Rl0(b,c,d,e,a,14); Rl0(a,b,c,d,e,15);
  }else{
    Rb0(a,b,c,d,e, 0); Rb0(e,a,b,c,d, 1); Rb0(d,e,a,b,c, 2); Rb0(c,d,e,a,b, 3);
    Rb0(b,c,d,e,a, 4); Rb0(a,b,c,d,e, 5); Rb0(e,a,b,c,d, 6); Rb0(d,e,a,b,c, 7);
    Rb0(c,d,e,a,b, 8); Rb0(b,c,d,e,a, 9); Rb0(a,b,c,d,e,10); Rb0(e,a,b,c,d,11);
    Rb0(d,e,a,b,c,12); Rb0(c,d,e,a,b,13); Rb0(b,c,d,e,a,14); Rb0(a,b,c,d,e,15);
  }
  R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
  R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
  R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
  R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
  R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
  R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
  R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
  R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
  R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
  R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
  R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
  R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
  R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
  R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
  R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
  R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);

  /* Add the working vars back into context.state[] */
  state[0] += a;
  state[1] += b;
  state[2] += c;
  state[3] += d;
  state[4] += e;

#undef a
#undef b
#undef c
#undef d
#undef e
}


/* Initialize a SHA1 context */
static void sha1_hash_init(SHA1Context *p){
  /* SHA1 initialization constants */
  p->state[0] = 0x67452301;
  p->state[1] = 0xEFCDAB89;
  p->state[2] = 0x98BADCFE;
  p->state[3] = 0x10325476;
  p->state[4] = 0xC3D2E1F0;
  p->count[0] = p->count[1] = 0;
}

/* Add new content to the SHA1 hash */
static void sha1_hash_step(
  SHA1Context *p,                 /* Add content to this context */
  const unsigned char *data,      /* Data to be added */
  unsigned int len                /* Number of bytes in data */
){
  unsigned int i, j;

  j = p->count[0];
  if( (p->count[0] += len << 3) < j ){
    p->count[1] += (len>>29)+1;
  }
  j = (j >> 3) & 63;
  if( (j + len) > 63 ){
    (void)memcpy(&p->buffer[j], data, (i = 64-j));
    SHA1Transform(p->state, p->buffer);
    for(; i + 63 < len; i += 64){
      SHA1Transform(p->state, &data[i]);
    }
    j = 0;
  }else{
    i = 0;
  }
  (void)memcpy(&p->buffer[j], &data[i], len - i);
}


/* Add padding and compute the message digest.  Render the
** message digest as binary and put it into digest[].
** digest[] must be at least 20 bytes long. */
static void sha1_hash_finish(
  SHA1Context *p,           /* The SHA1 context to finish and render */
  unsigned char *digest     /* Store hash here */
){
  unsigned int i;
  unsigned char finalcount[8];

  for (i = 0; i < 8; i++){
    finalcount[i] = (unsigned char)((p->count[(i >= 4 ? 0 : 1)]
       >> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
  }
  sha1_hash_step(p, (const unsigned char *)"\200", 1);
  while ((p->count[0] & 504) != 448){
    sha1_hash_step(p, (const unsigned char *)"\0", 1);
  }
  sha1_hash_step(p, finalcount, 8);  /* Should cause a SHA1Transform() */
  for (i = 0; i < 20; i++){
    digest[i] = (unsigned char)((p->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
  }
}

// ######## SHA-3 hash

/*
** Macros to determine whether the machine is big or little endian,
** and whether or not that determination is run-time or compile-time.
**
** For best performance, an attempt is made to guess at the byte-order
** using C-preprocessor macros.  If that is unsuccessful, or if
** -DSHA3_BYTEORDER=0 is set, then byte-order is determined
** at run-time.
*/
#ifndef SHA3_BYTEORDER
# if defined(i386)     || defined(__i386__)   || defined(_M_IX86) ||    \
     defined(__x86_64) || defined(__x86_64__) || defined(_M_X64)  ||    \
     defined(_M_AMD64) || defined(_M_ARM)     || defined(__x86)   ||    \
     defined(__arm__)
#   define SHA3_BYTEORDER    1234
# elif defined(sparc)    || defined(__ppc__)
#   define SHA3_BYTEORDER    4321
# else
#   define SHA3_BYTEORDER 0
# endif
#endif

typedef unsigned long long u64;

/*
** State structure for a SHA3 hash in progress
*/
typedef struct SHA3Context SHA3Context;
struct SHA3Context {
  union {
    u64 s[25];                /* Keccak state. 5x5 lines of 64 bits each */
    unsigned char x[1600];    /* ... or 1600 bytes */
  } u;
  unsigned nRate;        /* Bytes of input accepted per Keccak iteration */
  unsigned nLoaded;      /* Input bytes loaded into u.x[] so far this cycle */
  unsigned ixMask;       /* Insert next input into u.x[nLoaded^ixMask]. */
};

/*
** A single step of the Keccak mixing function for a 1600-bit state
*/
static void KeccakF1600Step(SHA3Context *p){
  int i;
  u64 b0, b1, b2, b3, b4;
  u64 c0, c1, c2, c3, c4;
  u64 d0, d1, d2, d3, d4;
  static const u64 RC[] = {
    0x0000000000000001ULL,  0x0000000000008082ULL,
    0x800000000000808aULL,  0x8000000080008000ULL,
    0x000000000000808bULL,  0x0000000080000001ULL,
    0x8000000080008081ULL,  0x8000000000008009ULL,
    0x000000000000008aULL,  0x0000000000000088ULL,
    0x0000000080008009ULL,  0x000000008000000aULL,
    0x000000008000808bULL,  0x800000000000008bULL,
    0x8000000000008089ULL,  0x8000000000008003ULL,
    0x8000000000008002ULL,  0x8000000000000080ULL,
    0x000000000000800aULL,  0x800000008000000aULL,
    0x8000000080008081ULL,  0x8000000000008080ULL,
    0x0000000080000001ULL,  0x8000000080008008ULL
  };
# define a00 (p->u.s[0])
# define a01 (p->u.s[1])
# define a02 (p->u.s[2])
# define a03 (p->u.s[3])
# define a04 (p->u.s[4])
# define a10 (p->u.s[5])
# define a11 (p->u.s[6])
# define a12 (p->u.s[7])
# define a13 (p->u.s[8])
# define a14 (p->u.s[9])
# define a20 (p->u.s[10])
# define a21 (p->u.s[11])
# define a22 (p->u.s[12])
# define a23 (p->u.s[13])
# define a24 (p->u.s[14])
# define a30 (p->u.s[15])
# define a31 (p->u.s[16])
# define a32 (p->u.s[17])
# define a33 (p->u.s[18])
# define a34 (p->u.s[19])
# define a40 (p->u.s[20])
# define a41 (p->u.s[21])
# define a42 (p->u.s[22])
# define a43 (p->u.s[23])
# define a44 (p->u.s[24])
# define ROL64(a,x) ((a<<x)|(a>>(64-x)))

  for(i=0; i<24; i+=4){
    c0 = a00^a10^a20^a30^a40;
    c1 = a01^a11^a21^a31^a41;
    c2 = a02^a12^a22^a32^a42;
    c3 = a03^a13^a23^a33^a43;
    c4 = a04^a14^a24^a34^a44;
    d0 = c4^ROL64(c1, 1);
    d1 = c0^ROL64(c2, 1);
    d2 = c1^ROL64(c3, 1);
    d3 = c2^ROL64(c4, 1);
    d4 = c3^ROL64(c0, 1);

    b0 = (a00^d0);
    b1 = ROL64((a11^d1), 44);
    b2 = ROL64((a22^d2), 43);
    b3 = ROL64((a33^d3), 21);
    b4 = ROL64((a44^d4), 14);
    a00 =   b0 ^((~b1)&  b2 );
    a00 ^= RC[i];
    a11 =   b1 ^((~b2)&  b3 );
    a22 =   b2 ^((~b3)&  b4 );
    a33 =   b3 ^((~b4)&  b0 );
    a44 =   b4 ^((~b0)&  b1 );

    b2 = ROL64((a20^d0), 3);
    b3 = ROL64((a31^d1), 45);
    b4 = ROL64((a42^d2), 61);
    b0 = ROL64((a03^d3), 28);
    b1 = ROL64((a14^d4), 20);
    a20 =   b0 ^((~b1)&  b2 );
    a31 =   b1 ^((~b2)&  b3 );
    a42 =   b2 ^((~b3)&  b4 );
    a03 =   b3 ^((~b4)&  b0 );
    a14 =   b4 ^((~b0)&  b1 );

    b4 = ROL64((a40^d0), 18);
    b0 = ROL64((a01^d1), 1);
    b1 = ROL64((a12^d2), 6);
    b2 = ROL64((a23^d3), 25);
    b3 = ROL64((a34^d4), 8);
    a40 =   b0 ^((~b1)&  b2 );
    a01 =   b1 ^((~b2)&  b3 );
    a12 =   b2 ^((~b3)&  b4 );
    a23 =   b3 ^((~b4)&  b0 );
    a34 =   b4 ^((~b0)&  b1 );

    b1 = ROL64((a10^d0), 36);
    b2 = ROL64((a21^d1), 10);
    b3 = ROL64((a32^d2), 15);
    b4 = ROL64((a43^d3), 56);
    b0 = ROL64((a04^d4), 27);
    a10 =   b0 ^((~b1)&  b2 );
    a21 =   b1 ^((~b2)&  b3 );
    a32 =   b2 ^((~b3)&  b4 );
    a43 =   b3 ^((~b4)&  b0 );
    a04 =   b4 ^((~b0)&  b1 );

    b3 = ROL64((a30^d0), 41);
    b4 = ROL64((a41^d1), 2);
    b0 = ROL64((a02^d2), 62);
    b1 = ROL64((a13^d3), 55);
    b2 = ROL64((a24^d4), 39);
    a30 =   b0 ^((~b1)&  b2 );
    a41 =   b1 ^((~b2)&  b3 );
    a02 =   b2 ^((~b3)&  b4 );
    a13 =   b3 ^((~b4)&  b0 );
    a24 =   b4 ^((~b0)&  b1 );

    c0 = a00^a20^a40^a10^a30;
    c1 = a11^a31^a01^a21^a41;
    c2 = a22^a42^a12^a32^a02;
    c3 = a33^a03^a23^a43^a13;
    c4 = a44^a14^a34^a04^a24;
    d0 = c4^ROL64(c1, 1);
    d1 = c0^ROL64(c2, 1);
    d2 = c1^ROL64(c3, 1);
    d3 = c2^ROL64(c4, 1);
    d4 = c3^ROL64(c0, 1);

    b0 = (a00^d0);
    b1 = ROL64((a31^d1), 44);
    b2 = ROL64((a12^d2), 43);
    b3 = ROL64((a43^d3), 21);
    b4 = ROL64((a24^d4), 14);
    a00 =   b0 ^((~b1)&  b2 );
    a00 ^= RC[i+1];
    a31 =   b1 ^((~b2)&  b3 );
    a12 =   b2 ^((~b3)&  b4 );
    a43 =   b3 ^((~b4)&  b0 );
    a24 =   b4 ^((~b0)&  b1 );

    b2 = ROL64((a40^d0), 3);
    b3 = ROL64((a21^d1), 45);
    b4 = ROL64((a02^d2), 61);
    b0 = ROL64((a33^d3), 28);
    b1 = ROL64((a14^d4), 20);
    a40 =   b0 ^((~b1)&  b2 );
    a21 =   b1 ^((~b2)&  b3 );
    a02 =   b2 ^((~b3)&  b4 );
    a33 =   b3 ^((~b4)&  b0 );
    a14 =   b4 ^((~b0)&  b1 );

    b4 = ROL64((a30^d0), 18);
    b0 = ROL64((a11^d1), 1);
    b1 = ROL64((a42^d2), 6);
    b2 = ROL64((a23^d3), 25);
    b3 = ROL64((a04^d4), 8);
    a30 =   b0 ^((~b1)&  b2 );
    a11 =   b1 ^((~b2)&  b3 );
    a42 =   b2 ^((~b3)&  b4 );
    a23 =   b3 ^((~b4)&  b0 );
    a04 =   b4 ^((~b0)&  b1 );

    b1 = ROL64((a20^d0), 36);
    b2 = ROL64((a01^d1), 10);
    b3 = ROL64((a32^d2), 15);
    b4 = ROL64((a13^d3), 56);
    b0 = ROL64((a44^d4), 27);
    a20 =   b0 ^((~b1)&  b2 );
    a01 =   b1 ^((~b2)&  b3 );
    a32 =   b2 ^((~b3)&  b4 );
    a13 =   b3 ^((~b4)&  b0 );
    a44 =   b4 ^((~b0)&  b1 );

    b3 = ROL64((a10^d0), 41);
    b4 = ROL64((a41^d1), 2);
    b0 = ROL64((a22^d2), 62);
    b1 = ROL64((a03^d3), 55);
    b2 = ROL64((a34^d4), 39);
    a10 =   b0 ^((~b1)&  b2 );
    a41 =   b1 ^((~b2)&  b3 );
    a22 =   b2 ^((~b3)&  b4 );
    a03 =   b3 ^((~b4)&  b0 );
    a34 =   b4 ^((~b0)&  b1 );

    c0 = a00^a40^a30^a20^a10;
    c1 = a31^a21^a11^a01^a41;
    c2 = a12^a02^a42^a32^a22;
    c3 = a43^a33^a23^a13^a03;
    c4 = a24^a14^a04^a44^a34;
    d0 = c4^ROL64(c1, 1);
    d1 = c0^ROL64(c2, 1);
    d2 = c1^ROL64(c3, 1);
    d3 = c2^ROL64(c4, 1);
    d4 = c3^ROL64(c0, 1);

    b0 = (a00^d0);
    b1 = ROL64((a21^d1), 44);
    b2 = ROL64((a42^d2), 43);
    b3 = ROL64((a13^d3), 21);
    b4 = ROL64((a34^d4), 14);
    a00 =   b0 ^((~b1)&  b2 );
    a00 ^= RC[i+2];
    a21 =   b1 ^((~b2)&  b3 );
    a42 =   b2 ^((~b3)&  b4 );
    a13 =   b3 ^((~b4)&  b0 );
    a34 =   b4 ^((~b0)&  b1 );

    b2 = ROL64((a30^d0), 3);
    b3 = ROL64((a01^d1), 45);
    b4 = ROL64((a22^d2), 61);
    b0 = ROL64((a43^d3), 28);
    b1 = ROL64((a14^d4), 20);
    a30 =   b0 ^((~b1)&  b2 );
    a01 =   b1 ^((~b2)&  b3 );
    a22 =   b2 ^((~b3)&  b4 );
    a43 =   b3 ^((~b4)&  b0 );
    a14 =   b4 ^((~b0)&  b1 );

    b4 = ROL64((a10^d0), 18);
    b0 = ROL64((a31^d1), 1);
    b1 = ROL64((a02^d2), 6);
    b2 = ROL64((a23^d3), 25);
    b3 = ROL64((a44^d4), 8);
    a10 =   b0 ^((~b1)&  b2 );
    a31 =   b1 ^((~b2)&  b3 );
    a02 =   b2 ^((~b3)&  b4 );
    a23 =   b3 ^((~b4)&  b0 );
    a44 =   b4 ^((~b0)&  b1 );

    b1 = ROL64((a40^d0), 36);
    b2 = ROL64((a11^d1), 10);
    b3 = ROL64((a32^d2), 15);
    b4 = ROL64((a03^d3), 56);
    b0 = ROL64((a24^d4), 27);
    a40 =   b0 ^((~b1)&  b2 );
    a11 =   b1 ^((~b2)&  b3 );
    a32 =   b2 ^((~b3)&  b4 );
    a03 =   b3 ^((~b4)&  b0 );
    a24 =   b4 ^((~b0)&  b1 );

    b3 = ROL64((a20^d0), 41);
    b4 = ROL64((a41^d1), 2);
    b0 = ROL64((a12^d2), 62);
    b1 = ROL64((a33^d3), 55);
    b2 = ROL64((a04^d4), 39);
    a20 =   b0 ^((~b1)&  b2 );
    a41 =   b1 ^((~b2)&  b3 );
    a12 =   b2 ^((~b3)&  b4 );
    a33 =   b3 ^((~b4)&  b0 );
    a04 =   b4 ^((~b0)&  b1 );

    c0 = a00^a30^a10^a40^a20;
    c1 = a21^a01^a31^a11^a41;
    c2 = a42^a22^a02^a32^a12;
    c3 = a13^a43^a23^a03^a33;
    c4 = a34^a14^a44^a24^a04;
    d0 = c4^ROL64(c1, 1);
    d1 = c0^ROL64(c2, 1);
    d2 = c1^ROL64(c3, 1);
    d3 = c2^ROL64(c4, 1);
    d4 = c3^ROL64(c0, 1);

    b0 = (a00^d0);
    b1 = ROL64((a01^d1), 44);
    b2 = ROL64((a02^d2), 43);
    b3 = ROL64((a03^d3), 21);
    b4 = ROL64((a04^d4), 14);
    a00 =   b0 ^((~b1)&  b2 );
    a00 ^= RC[i+3];
    a01 =   b1 ^((~b2)&  b3 );
    a02 =   b2 ^((~b3)&  b4 );
    a03 =   b3 ^((~b4)&  b0 );
    a04 =   b4 ^((~b0)&  b1 );

    b2 = ROL64((a10^d0), 3);
    b3 = ROL64((a11^d1), 45);
    b4 = ROL64((a12^d2), 61);
    b0 = ROL64((a13^d3), 28);
    b1 = ROL64((a14^d4), 20);
    a10 =   b0 ^((~b1)&  b2 );
    a11 =   b1 ^((~b2)&  b3 );
    a12 =   b2 ^((~b3)&  b4 );
    a13 =   b3 ^((~b4)&  b0 );
    a14 =   b4 ^((~b0)&  b1 );

    b4 = ROL64((a20^d0), 18);
    b0 = ROL64((a21^d1), 1);
    b1 = ROL64((a22^d2), 6);
    b2 = ROL64((a23^d3), 25);
    b3 = ROL64((a24^d4), 8);
    a20 =   b0 ^((~b1)&  b2 );
    a21 =   b1 ^((~b2)&  b3 );
    a22 =   b2 ^((~b3)&  b4 );
    a23 =   b3 ^((~b4)&  b0 );
    a24 =   b4 ^((~b0)&  b1 );

    b1 = ROL64((a30^d0), 36);
    b2 = ROL64((a31^d1), 10);
    b3 = ROL64((a32^d2), 15);
    b4 = ROL64((a33^d3), 56);
    b0 = ROL64((a34^d4), 27);
    a30 =   b0 ^((~b1)&  b2 );
    a31 =   b1 ^((~b2)&  b3 );
    a32 =   b2 ^((~b3)&  b4 );
    a33 =   b3 ^((~b4)&  b0 );
    a34 =   b4 ^((~b0)&  b1 );

    b3 = ROL64((a40^d0), 41);
    b4 = ROL64((a41^d1), 2);
    b0 = ROL64((a42^d2), 62);
    b1 = ROL64((a43^d3), 55);
    b2 = ROL64((a44^d4), 39);
    a40 =   b0 ^((~b1)&  b2 );
    a41 =   b1 ^((~b2)&  b3 );
    a42 =   b2 ^((~b3)&  b4 );
    a43 =   b3 ^((~b4)&  b0 );
    a44 =   b4 ^((~b0)&  b1 );
  }
}

/*
** Initialize a new hash.  iSize determines the size of the hash
** in bits and should be one of 224, 256, 384, or 512.  Or iSize
** can be zero to use the default hash size of 256 bits.
*/
static void SHA3Init(SHA3Context *p, int iSize){
  memset(p, 0, sizeof(*p));
  if( iSize>=128 && iSize<=512 ){
    p->nRate = (1600 - ((iSize + 31)&~31)*2)/8;
  }else{
    p->nRate = (1600 - 2*256)/8;
  }
#if SHA3_BYTEORDER==1234
  /* Known to be little-endian at compile-time. No-op */
#elif SHA3_BYTEORDER==4321
  p->ixMask = 7;  /* Big-endian */
#else
  {
    static unsigned int one = 1;
    if( 1==*(unsigned char*)&one ){
      /* Little endian.  No byte swapping. */
      p->ixMask = 0;
    }else{
      /* Big endian.  Byte swap. */
      p->ixMask = 7;
    }
  }
#endif
}

/*
** Make consecutive calls to the SHA3Update function to add new content
** to the hash
*/
static void SHA3Update(
  SHA3Context *p,
  const unsigned char *aData,
  unsigned int nData
){
  unsigned int i = 0;
  if( aData==0 ) return;
#if SHA3_BYTEORDER==1234
  if( (p->nLoaded % 8)==0 && ((aData - (const unsigned char*)0)&7)==0 ){
    for(; i+7<nData; i+=8){
      p->u.s[p->nLoaded/8] ^= *(u64*)&aData[i];
      p->nLoaded += 8;
      if( p->nLoaded>=p->nRate ){
        KeccakF1600Step(p);
        p->nLoaded = 0;
      }
    }
  }
#endif
  for(; i<nData; i++){
#if SHA3_BYTEORDER==1234
    p->u.x[p->nLoaded] ^= aData[i];
#elif SHA3_BYTEORDER==4321
    p->u.x[p->nLoaded^0x07] ^= aData[i];
#else
    p->u.x[p->nLoaded^p->ixMask] ^= aData[i];
#endif
    p->nLoaded++;
    if( p->nLoaded==p->nRate ){
      KeccakF1600Step(p);
      p->nLoaded = 0;
    }
  }
}

/*
** After all content has been added, invoke SHA3Final() to compute
** the final hash.  The function returns a pointer to the binary
** hash value.
*/
static unsigned char *SHA3Final(SHA3Context *p){
  unsigned int i;
  if( p->nLoaded==p->nRate-1 ){
    const unsigned char c1 = 0x86;
    SHA3Update(p, &c1, 1);
  }else{
    const unsigned char c2 = 0x06;
    const unsigned char c3 = 0x80;
    SHA3Update(p, &c2, 1);
    p->nLoaded = p->nRate - 1;
    SHA3Update(p, &c3, 1);
  }
  for(i=0; i<p->nRate; i++){
    p->u.x[i+p->nRate] = p->u.x[i^p->ixMask];
  }
  return &p->u.x[p->nRate];
}

// ########

typedef struct {
  union {
    SHA1Context sha1;
    SHA3Context sha3;
  };
  long long alg;
  FILE*echo;
  unsigned char*out;
} HashState;

static ssize_t hash_write(void *cookie, const char *buf, size_t size) {
  HashState*hs=cookie;
  if(!size) return 0;
  if(hs->echo) fwrite(buf,1,size,hs->echo);
  if(hs->alg==HASH_SHA1) sha1_hash_step(&hs->sha1,buf,size);
  else SHA3Update(&hs->sha3,buf,size);
  return size;
}

static int hash_close(void *cookie) {
  HashState*hs=cookie;
  if(hs->alg==HASH_SHA1) {
    sha1_hash_finish(&hs->sha1,hs->out);
  } else if(hs->alg) {
    memcpy(hs->out,SHA3Final(&hs->sha3),hash_length(hs->alg));
  }
  free(cookie);
  return 0;
}

long hash_length(long long alg) {
  switch(alg) {
    case HASH_SHA1: return 20;
    case HASH_SHA3_224: return 224/8;
    case HASH_SHA3_256: return 256/8;
    case HASH_SHA3_384: return 384/8;
    case HASH_SHA3_512: return 512/8;
    default: return 0;
  }
}

FILE*hash_stream(long long alg,FILE*echo,unsigned char*out) {
  HashState*hs=malloc(sizeof(HashState));
  FILE*fp;
  if(!hs) return 0;
  switch(alg) {
    case HASH_SHA1: sha1_hash_init(&hs->sha1); break;
    case HASH_SHA3_224: SHA3Init(&hs->sha3,224); break;
    case HASH_SHA3_256: SHA3Init(&hs->sha3,256); break;
    case HASH_SHA3_384: SHA3Init(&hs->sha3,384); break;
    case HASH_SHA3_512: SHA3Init(&hs->sha3,512); break;
    default: free(hs); return 0;
  }
  fp=fopencookie(hs,"w",(cookie_io_functions_t){.write=hash_write,.close=hash_close});
  if(!fp) {
    free(hs);
    return 0;
  }
  hs->alg=alg;
  hs->echo=echo;
  hs->out=out;
  return fp;
}

unsigned char*hash_buffer(long long alg,const unsigned char*data,int len) {
  int n=hash_length(alg);
  unsigned char*b;
  FILE*fp;
  if(!n || (len && !data)) return 0;
  b=malloc(n);
  if(!b) return 0;
  fp=hash_stream(alg,0,b);
  if(!fp) {
    free(b);
    return 0;
  }
  fwrite(data,1,len,fp);
  fclose(fp);
  return b;
}

// Free public domain cryptographic hash library

#define HASH_SHA1 0x11
#define HASH_SHA3_512 0x14
#define HASH_SHA3_384 0x15
#define HASH_SHA3_256 0x16
#define HASH_SHA3_224 0x17

long hash_length(long long alg);
// Tell the length (in bytes) of the hash of the specified algorithm. If
// it is not implemented, then the result is zero.

FILE*hash_stream(long long alg,FILE*echo,unsigned char*out);
// Returns a writable stream. If the echo stream is not null, then any
// data written to the stream is also written to the echo stream. When
// the stream is closed, the hash (as binary) is written to the out.

unsigned char*hash_buffer(long long alg,const unsigned char*data,int len);
// Returns a hash (as binary) of the specified data. The returned buffer
// is allocated by malloc and must be freed by free. (This function is a
// convenience function implemented in terms of the other two functions.)

#if 0
gcc ${CFLAGS:--s -O2} -o ${EXE:-~/bin/heromesh} -Wno-multichar main.c class.o picture.o bindings.o function.o exec.o game.o edit.o picedit.o smallxrm.o sqlite3.o `sdl-config --cflags --libs` -ldl -lpthread -lm
gcc ${CFLAGS:--s -O2} -o ${EXE:-~/bin/heromesh} -Wno-multichar main.c class.o picture.o bindings.o function.o exec.o game.o edit.o picedit.o smallxrm.o hash.o sqlite3.o `sdl-config --cflags --libs` -ldl -lpthread -lm
exit
#endif

/*
  This program is part of Free Hero Mesh and is public domain.
*/

   130 = CollisionLayers
   132 = Compatible

CVALUE(number)
  Makes a game value of type 'class', given the class number. You can also
  specify the class name instead of the number.

HASH(data,algorithm)
  Make the hash of the data as a binary blob. See hash.h for a list of the
  valid numbers to use as the hash algorithm numbers.

HEROMESH_ESCAPE(blob)
  Converts blob representation of a game string into escaped format.

HEROMESH_TYPE(value)
  The type of a game value, given as a 64-bit integer. The types are
  'class', 'number', 'string', 'object', and 'sound'.