C++ GET函数代码示例

FUNCTION_PTR Parser::Parse_DeclareFunction(int *token_id, const char *fn_name, bool is_local)
{
	FUNCTION_PTR ptr = (FUNCTION_PTR)POV_MALLOC(sizeof(FUNCTION), "Function ID");
	ExprNode *expression = NULL;
	FunctionCode function;

	// default type is float function
	*token_id = FUNCT_ID_TOKEN;

	FNCode f(this, &function, is_local, fn_name);
	f.Parameter();

	Parse_Begin();

	Get_Token();
	if(Token.Token_Id == INTERNAL_TOKEN)
	{
		GET(LEFT_PAREN_TOKEN);

		Get_Token();
		if(Token.Function_Id != FLOAT_TOKEN)
			Expectation_Error("internal function identifier");
		expression = FNSyntax_GetTrapExpression((unsigned int)(Token.Token_Float));

		function.flags = FN_INLINE_FLAG;

		GET(RIGHT_PAREN_TOKEN);
	}
	else if(Token.Token_Id == TRANSFORM_TOKEN)
	{
		if(function.parameter_cnt != 0)
			Error("Function parameters for transform functions are not allowed.");

		expression = FNSyntax_GetTrapExpression(1); // 1 refers to POVFPU_TrapSTable[1] = f_transform [trf]

		function.private_copy_method = (FNCODE_PRIVATE_COPY_METHOD)Copy_Transform;
		function.private_destroy_method = (FNCODE_PRIVATE_DESTROY_METHOD)Destroy_Transform;

		function.private_data = reinterpret_cast<void *>(Parse_Transform_Block());

		function.return_size = 3; // returns a 3d vector!!!

		// function type is vector function
		*token_id = VECTFUNCT_ID_TOKEN;
	}
	else if(Token.Token_Id == SPLINE_TOKEN)
	{
		if(function.parameter_cnt != 0)
			Error("Function parameters for spline functions are not allowed.");

		Experimental_Flag |= EF_SPLINE;

		expression = FNSyntax_GetTrapExpression(2); // 2 refers to POVFPU_TrapSTable[2] = f_spline [trf]

		function.private_copy_method = (FNCODE_PRIVATE_COPY_METHOD)Copy_Spline;
		function.private_destroy_method = (FNCODE_PRIVATE_DESTROY_METHOD)Destroy_Spline;

		Parse_Begin();
		function.private_data = reinterpret_cast<void *>(Parse_Spline());
		Parse_End();

		function.return_size = (reinterpret_cast<SPLINE *>(function.private_data))->Terms; // returns a 2d, 3d, 4d or 5d vector!!!

		// function type is vector function
		*token_id = VECTFUNCT_ID_TOKEN;
	}
	else if(Token.Token_Id == PIGMENT_TOKEN)
	{
		if(function.parameter_cnt != 0)
			Error("Function parameters for pigment functions are not allowed.");

		expression = FNSyntax_GetTrapExpression(0); // 0 refers to POVFPU_TrapSTable[0] = f_pigment [trf]

		function.private_copy_method = (FNCODE_PRIVATE_COPY_METHOD)Copy_Pigment;
		function.private_destroy_method = (FNCODE_PRIVATE_DESTROY_METHOD)Destroy_Pigment;

		Parse_Begin();
		function.private_data = reinterpret_cast<void *>(Create_Pigment());
		Parse_Pigment(reinterpret_cast<PIGMENT **>(&function.private_data));
		Parse_End();
		Post_Pigment(reinterpret_cast<PIGMENT *>(function.private_data));

		function.return_size = 5; // returns a color!!!

		// function type is vector function
		*token_id = VECTFUNCT_ID_TOKEN;
	}
	else if(Token.Token_Id == PATTERN_TOKEN)
	{
		if(function.parameter_cnt != 0)
			Error("Function parameters for pattern functions are not allowed.");

		expression = FNSyntax_GetTrapExpression(77); // 77 refers to POVFPU_TrapTable[77] = f_pattern [trf]

		function.private_copy_method = (FNCODE_PRIVATE_COPY_METHOD)Copy_Pigment;
		function.private_destroy_method = (FNCODE_PRIVATE_DESTROY_METHOD)Destroy_Pigment;

		Parse_Begin();
		function.private_data = reinterpret_cast<void *>(Create_Pigment()); // Yes, this is a pigment! [trf]
		Parse_PatternFunction(reinterpret_cast<TPATTERN *>(function.private_data));
//.........这里部分代码省略.........

static void suni_hz(unsigned long from_timer)
{
	struct suni_priv *walk;
	struct atm_dev *dev;
	struct k_sonet_stats *stats;

	for (walk = sunis; walk; walk = walk->next) {
		dev = walk->dev;
		stats = &walk->sonet_stats;
		PUT(0,MRI); /* latch counters */
		udelay(1);
		ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) |
		    ((GET(RSOP_SBM) & 0xff) << 8));
		ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) |
		    ((GET(RLOP_LB) & 0xff) << 8) |
		    ((GET(RLOP_LBM) & 0xf) << 16));
		ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) |
		    ((GET(RPOP_PBM) & 0xff) << 8));
		ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) |
		    ((GET(RLOP_LF) & 0xff) << 8) |
		    ((GET(RLOP_LFM) & 0xf) << 16));
		ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) |
		    ((GET(RPOP_PFM) & 0xff) << 8));
		ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
		ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
		ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) |
		    ((GET(RACP_RCC) & 0xff) << 8) |
		    ((GET(RACP_RCCM) & 7) << 16));
		ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) |
		    ((GET(TACP_TCC) & 0xff) << 8) |
		    ((GET(TACP_TCCM) & 7) << 16));
	}
	if (from_timer) mod_timer(&poll_timer,jiffies+HZ);
}

static int HalfSize(GLint components, GLint width, GLint height, const unsigned char *data, unsigned char *d, int filter) {
      int x, y, c;
      int line = width*components;

      if (width > 1 && height > 1) {
            if (filter)
                  for (y = 0; y < height; y += 2) {
                        for (x = 0; x < width; x += 2) {
                              for (c = 0; c < components; c++) {
                                    *d++ = (GET(0)+GET(components)+GET(line)+GET(line+components)) / 4;
                                    data++;
                              }
                              data += components;
                        }
                        data += line;
                  }
            else
                  for (y = 0; y < height; y += 2) {
                        for (x = 0; x < width; x += 2) {
                              for (c = 0; c < components; c++) {
                                    *d++ = GET(0);
                                    data++;
                              }
                              data += components;
                        }
                        data += line;
                  }
      }
      else if (width > 1 && height == 1) {
            if (filter)
                  for (y = 0; y < height; y += 1) {
                        for (x = 0; x < width; x += 2) {
                              for (c = 0; c < components; c++) {
                                    *d++ = (GET(0)+GET(components)) / 2;
                                    data++;
                              }
                              data += components;
                        }
                  }
            else
                  for (y = 0; y < height; y += 1) {
                        for (x = 0; x < width; x += 2) {
                              for (c = 0; c < components; c++) {
                                    *d++ = GET(0);
                                    data++;
                              }
                              data += components;
                        }
                  }
      }
      else if (width == 1 && height > 1) {
            if (filter)
                  for (y = 0; y < height; y += 2) {
                        for (x = 0; x < width; x += 1) {
                              for (c = 0; c < components; c++) {
                                    *d++ = (GET(0)+GET(line)) / 2;
                                    data++;
                              }
                        }
                        data += line;
                  }
            else
                  for (y = 0; y < height; y += 2) {
                        for (x = 0; x < width; x += 1) {
                              for (c = 0; c < components; c++) {
                                    *d++ = GET(0);
                                    data++;
                              }
                        }
                        data += line;
                  }
      }
      else {
            return 0;
      }

      return 1;
}

//.........这里部分代码省略.........
      fromend = from + saved_input_len;
    }
  else
    {
      fromlen = (*get) (input_buffer, sizeof input_buffer);
      if (fromlen == 0)
	return 0;
      from = input_buffer;
      fromend = from + fromlen;
    }

  while (1)
    {
      /* The cases in this switch end with continue, in order to
	 branch back to the top of this while loop and generate the
	 next output character in the appropriate state.  */
      switch (state)
	{
	case -1:
	  ch = *out_string++;
	  if (*out_string == '\0')
	    {
	      state = old_state;
	      old_state = 3;
	    }
	  PUT (ch);
	  continue;

	case -2:
	  for (;;)
	    {
	      do
		{
		  ch = GET ();

		  if (ch == EOF)
		    {
		      as_warn (_("end of file in comment"));
		      goto fromeof;
		    }

		  if (ch == '\n')
		    PUT ('\n');
		}
	      while (ch != '*');

	      while ((ch = GET ()) == '*')
		;

	      if (ch == EOF)
		{
		  as_warn (_("end of file in comment"));
		  goto fromeof;
		}

	      if (ch == '/')
		break;

	      UNGET (ch);
	    }

	  state = old_state;
	  UNGET (' ');
	  continue;

	case 4:

/*
 * Actual conversion; called from iconv()
 */
size_t
_icv_iconv(struct _icv_state *st, char **inbuf, size_t *inbytesleft,
				char **outbuf, size_t *outbytesleft)
{
	int				cset, stat;
	unsigned char	*op, ic, offset;
	char			*ip;
	size_t			ileft, oleft;
	size_t			retval;

	cset = st->_st_cset;
	stat = st->_st_stat;

	if ((inbuf == 0) || (*inbuf == 0)) {
		cset = CS_0;
		stat = ST_INIT;
		op = (unsigned char *)*outbuf;
		oleft = *outbytesleft;
		retval = 0;
		goto ret2;
	}

	ip = *inbuf;
	op = (unsigned char *)*outbuf;
	ileft = *inbytesleft;
	oleft = *outbytesleft;
	offset = 0;

	/* Everything down to here was taken unchanged from  @(#)ISO-2022-JP%SJIS. 
	   =======================================================================
	
	 *
	 * Main loop; basically 1 loop per 1 input byte
	 */

	while (ileft > 0) 
	{
		GET(ic);
	/*
		If the char is one of the following [ / ] { | } then convert 
		it to its corresponding value. In all other cases if the char 
		is greater than octal \178 ( ie a high bit char) convert it 
		to an underscore (_), as it has no mapping to 7 bit ASCII.
		Otrherwise the char is the same in both cose sets. 
	*/
		ic=__ib2_to_wi2[ic];
		
			
		PUT(ic);	
	/* 
		Put the converted character into the output buffer, and decrement 
		the count of chars left in both the in and out buffers.
		If we have no space left in the out buffer, but we have no reached
		the end of the input buffer. We return what we have, and set the
		errno (Error) to E2BIG.
	*/
		if ((oleft < 1)	 && (ileft > 0))
		{
			errno = E2BIG;
			retval = ERR_RETURN;
			goto ret;
		}		


	}
/* 
We only get here if the end of the in buffer has been reached, we therefore return the
value 0 to denote that we have sucesfully converted the inbuffer.
*/
	retval = ileft;

/*  Taken unchanged from   @(#)ISO-2022-JP%SJIS.  */

ret:
	st->_st_cset = cset;
	st->_st_stat = stat;
	*inbuf = ip;
	*inbytesleft = ileft;
ret2:
	*outbuf = (char *)op;
	*outbytesleft = oleft;

	return (retval);
}

static int
set_start_bits(const uschar *code, uschar *start_bits, BOOL caseless,
  BOOL utf8, compile_data *cd)
{
register int c;
int yield = SSB_DONE;
int table_limit = utf8? 16:32;

#if 0
/* ========================================================================= */
/* The following comment and code was inserted in January 1999. In May 2006,
when it was observed to cause compiler warnings about unused values, I took it
out again. If anybody is still using OS/2, they will have to put it back
manually. */

/* This next statement and the later reference to dummy are here in order to
trick the optimizer of the IBM C compiler for OS/2 into generating correct
code. Apparently IBM isn't going to fix the problem, and we would rather not
disable optimization (in this module it actually makes a big difference, and
the pcre module can use all the optimization it can get). */

volatile int dummy;
/* ========================================================================= */
#endif

do
  {
  const uschar *tcode = code + (((int)*code == OP_CBRA)? 3:1) + LINK_SIZE;
  BOOL try_next = TRUE;

  while (try_next)    /* Loop for items in this branch */
    {
    int rc;
    switch(*tcode)
      {
      /* Fail if we reach something we don't understand */

      default:
      return SSB_FAIL;

      /* If we hit a bracket or a positive lookahead assertion, recurse to set
      bits from within the subpattern. If it can't find anything, we have to
      give up. If it finds some mandatory character(s), we are done for this
      branch. Otherwise, carry on scanning after the subpattern. */

      case OP_BRA:
      case OP_SBRA:
      case OP_CBRA:
      case OP_SCBRA:
      case OP_ONCE:
      case OP_ASSERT:
      rc = set_start_bits(tcode, start_bits, caseless, utf8, cd);
      if (rc == SSB_FAIL) return SSB_FAIL;
      if (rc == SSB_DONE) try_next = FALSE; else
        {
        do tcode += GET(tcode, 1); while (*tcode == OP_ALT);
        tcode += 1 + LINK_SIZE;
        }
      break;

      /* If we hit ALT or KET, it means we haven't found anything mandatory in
      this branch, though we might have found something optional. For ALT, we
      continue with the next alternative, but we have to arrange that the final
      result from subpattern is SSB_CONTINUE rather than SSB_DONE. For KET,
      return SSB_CONTINUE: if this is the top level, that indicates failure,
      but after a nested subpattern, it causes scanning to continue. */

      case OP_ALT:
      yield = SSB_CONTINUE;
      try_next = FALSE;
      break;

      case OP_KET:
      case OP_KETRMAX:
      case OP_KETRMIN:
      return SSB_CONTINUE;

      /* Skip over callout */

      case OP_CALLOUT:
      tcode += 2 + 2*LINK_SIZE;
      break;

      /* Skip over lookbehind and negative lookahead assertions */

      case OP_ASSERT_NOT:
      case OP_ASSERTBACK:
      case OP_ASSERTBACK_NOT:
      do tcode += GET(tcode, 1); while (*tcode == OP_ALT);
      tcode += 1 + LINK_SIZE;
      break;

      /* Skip over an option setting, changing the caseless flag */

      case OP_OPT:
      caseless = (tcode[1] & PCRE_CASELESS) != 0;
      tcode += 2;
      break;

      /* BRAZERO does the bracket, but carries on. */
//.........这里部分代码省略.........

//.........这里部分代码省略.........
          if (c > 0xff) SET_BIT(0xff); else SET_BIT(c);
          }
        }
      try_next = FALSE;
      break;

      /* We can ignore word boundary tests. */

      case OP_WORD_BOUNDARY:
      case OP_NOT_WORD_BOUNDARY:
      tcode++;
      break;

      /* If we hit a bracket or a positive lookahead assertion, recurse to set
      bits from within the subpattern. If it can't find anything, we have to
      give up. If it finds some mandatory character(s), we are done for this
      branch. Otherwise, carry on scanning after the subpattern. */

      case OP_BRA:
      case OP_SBRA:
      case OP_CBRA:
      case OP_SCBRA:
      case OP_BRAPOS:
      case OP_SBRAPOS:
      case OP_CBRAPOS:
      case OP_SCBRAPOS:
      case OP_ONCE:
      case OP_ONCE_NC:
      case OP_ASSERT:
      rc = set_start_bits(tcode, start_bits, utf, cd);
      if (rc == SSB_FAIL || rc == SSB_UNKNOWN) return rc;
      if (rc == SSB_DONE) try_next = FALSE; else
        {
        do tcode += GET(tcode, 1); while (*tcode == OP_ALT);
        tcode += 1 + LINK_SIZE;
        }
      break;

      /* If we hit ALT or KET, it means we haven't found anything mandatory in
      this branch, though we might have found something optional. For ALT, we
      continue with the next alternative, but we have to arrange that the final
      result from subpattern is SSB_CONTINUE rather than SSB_DONE. For KET,
      return SSB_CONTINUE: if this is the top level, that indicates failure,
      but after a nested subpattern, it causes scanning to continue. */

      case OP_ALT:
      yield = SSB_CONTINUE;
      try_next = FALSE;
      break;

      case OP_KET:
      case OP_KETRMAX:
      case OP_KETRMIN:
      case OP_KETRPOS:
      return SSB_CONTINUE;

      /* Skip over callout */

      case OP_CALLOUT:
      tcode += 2 + 2*LINK_SIZE;
      break;

      /* Skip over lookbehind and negative lookahead assertions */

      case OP_ASSERT_NOT:
      case OP_ASSERTBACK:

static inline int GET_ALLOC( void *p  ) {
  return GET(p) & 0x1;
}

static int
find_minlength(const pcre2_real_code *re, PCRE2_SPTR code,
  PCRE2_SPTR startcode, BOOL utf, recurse_check *recurses, int *countptr,
  int *backref_cache)
{
int length = -1;
int prev_cap_recno = -1;
int prev_cap_d = 0;
int prev_recurse_recno = -1;
int prev_recurse_d = 0;
uint32_t once_fudge = 0;
BOOL had_recurse = FALSE;
BOOL dupcapused = (re->flags & PCRE2_DUPCAPUSED) != 0;
recurse_check this_recurse;
int branchlength = 0;
PCRE2_UCHAR *cc = (PCRE2_UCHAR *)code + 1 + LINK_SIZE;

/* If this is a "could be empty" group, its minimum length is 0. */

if (*code >= OP_SBRA && *code <= OP_SCOND) return 0;

/* Skip over capturing bracket number */

if (*code == OP_CBRA || *code == OP_CBRAPOS) cc += IMM2_SIZE;

/* A large and/or complex regex can take too long to process. */

if ((*countptr)++ > 1000) return -1;

/* Scan along the opcodes for this branch. If we get to the end of the branch,
check the length against that of the other branches. If the accumulated length
passes 16-bits, stop. */

for (;;)
  {
  int d, min, recno;
  PCRE2_UCHAR *cs, *ce;
  PCRE2_UCHAR op = *cc;

  if (branchlength >= UINT16_MAX) return UINT16_MAX;

  switch (op)
    {
    case OP_COND:
    case OP_SCOND:

    /* If there is only one branch in a condition, the implied branch has zero
    length, so we don't add anything. This covers the DEFINE "condition"
    automatically. If there are two branches we can treat it the same as any
    other non-capturing subpattern. */

    cs = cc + GET(cc, 1);
    if (*cs != OP_ALT)
      {
      cc = cs + 1 + LINK_SIZE;
      break;
      }
    goto PROCESS_NON_CAPTURE;

    /* There's a special case of OP_ONCE, when it is wrapped round an
    OP_RECURSE. We'd like to process the latter at this level so that
    remembering the value works for repeated cases. So we do nothing, but
    set a fudge value to skip over the OP_KET after the recurse. */

    case OP_ONCE:
    if (cc[1+LINK_SIZE] == OP_RECURSE && cc[2*(1+LINK_SIZE)] == OP_KET)
      {
      once_fudge = 1 + LINK_SIZE;
      cc += 1 + LINK_SIZE;
      break;
      }
    /* Fall through */

    case OP_ONCE_NC:
    case OP_BRA:
    case OP_SBRA:
    case OP_BRAPOS:
    case OP_SBRAPOS:
    PROCESS_NON_CAPTURE:
    d = find_minlength(re, cc, startcode, utf, recurses, countptr,
      backref_cache);
    if (d < 0) return d;
    branchlength += d;
    do cc += GET(cc, 1); while (*cc == OP_ALT);
    cc += 1 + LINK_SIZE;
    break;

    /* To save time for repeated capturing subpatterns, we remember the
    length of the previous one. Unfortunately we can't do the same for
    the unnumbered ones above. Nor can we do this if (?| is present in the
    pattern because captures with the same number are not then identical. */

    case OP_CBRA:
    case OP_SCBRA:
    case OP_CBRAPOS:
    case OP_SCBRAPOS:
    recno = (int)GET2(cc, 1+LINK_SIZE);
    if (dupcapused || recno != prev_cap_recno)
      {
      prev_cap_recno = recno;
//.........这里部分代码省略.........

/**********************************************************
 * add_to_free_list
 * adds the free block to the free list
 **********************************************************/
void add_to_free_list(void *bp)
{
//	printf("IN ADD_TO_FREE_LIST\n");
//	printf("adding free block %p\n",bp);

	//get the size of the free block
	size_t size = GET(HDRP(bp));
	
	int i = get_segregated_index(size);

	//print_ptr(bp);
	if(segregated_list[i] == NULL)
	{
		//add the free block to the free list which is NULL
		segregated_list[i] = bp;

		//set the previous as 0 or (null/nothing)
		PUT(LOCATION_PREV_FREE_BLKP(bp),0);

		//set the next free block as 0 or (null/nothing)
		PUT(LOCATION_NEXT_FREE_BLKP(bp),0);

	}
	else
	{
		if(GET_SIZE(HDRP(segregated_list[i]))>GET_SIZE(HDRP(bp))){

			if(GET_NEXT_FREE_BLK(segregated_list[i])!=0)
			{
		//	print_seg(1);
//				void* sec_ptr = GET_NEXT_FREE_BLK(segregated_list[i]);
				PUT(LOCATION_NEXT_FREE_BLKP(bp),GET_NEXT_FREE_BLK(segregated_list[i]));
				PUT(GET_PREV_FREE_BLK(LOCATION_NEXT_FREE_BLKP(segregated_list[i])),bp);
				PUT(LOCATION_NEXT_FREE_BLKP(segregated_list[i]),bp);				
				PUT(LOCATION_PREV_FREE_BLKP(bp),segregated_list[i]);
				//printf("test esfewfe\n");
			//	print_ptr(bp);
			//	print_ptr(segregated_list[i]);
//print_seg(1);				
				
			}else{
						//printf("test2\n");
			//we only have 1 block in the list
				PUT(LOCATION_NEXT_FREE_BLKP(segregated_list[i]),bp);
				PUT(LOCATION_PREV_FREE_BLKP(bp),segregated_list[i]);
				PUT(LOCATION_PREV_FREE_BLKP(segregated_list[i]),0);
				PUT(LOCATION_NEXT_FREE_BLKP(bp),0);			
			}
			
			
		}else
		{
			//Set the next block of the new head as the previous head
			PUT(LOCATION_NEXT_FREE_BLKP(bp),segregated_list[i]);

			//Set the previous block of the new head as NULL
			PUT(LOCATION_PREV_FREE_BLKP(bp), 0);

			//Set the previous block of the previous head to the new head
			PUT(LOCATION_PREV_FREE_BLKP(segregated_list[i]),bp);

			segregated_list[i] = bp;
		}
	}
}

//
// Read the size and allocated fields from address p
//
static inline size_t GET_SIZE( void *p )  { 
  return GET(p) & ~0x7;
}

/* test routine */
int test_main(int args, char ** argv) {
    int i,j;
    waypoint_vec_t wmap;
    region_map_t regs;
    INIT(wmap);
    INIT(regs);
    bool ret;

    for (i=0; i<7; i++) {
        PUSH_BACK(regs, regions[i]);
    }

    int self_refs = 0;
    bool r = makeWaypointTable(&wmap, &regs, NR_POINTS, points);
    iprintf ("Waypoint Table: \n");
    iprintf ("          \t                   ");

    for (i=0; i<SIZE(wmap); ++i) {
        iprintf("%6d ", i);
    }
    iprintf("\n");


    for (i=0; i<SIZE(wmap); ++i) {
        iprintf ("%d: %5s\t (%7.1f,%7.1f) ", i, points[i].comment,
                 GET(wmap, i).pos.x, GET(wmap, i).pos.y);
        for (j=0; j<SIZE(wmap); j++) {
            double dist = GET(wmap, i).distances[j];
            char sep = ((j+1)%5) == 0? '|':' ';
            if (dist == INFINITY) {
                iprintf ("      %c", sep);
            } else if (dist < 0.01) {
                if (i == j) {
                    iprintf ("   *  %c", sep);
                    self_refs++;
                } else {
                    iprintf ("   X  %c", sep);
                }
            } else {
                iprintf ("%6.1f%c", GET(wmap, i).distances[j], sep);
            }
        }
        iprintf ("\n");
    }
    iprintf("\nSelf References: %d\n", self_refs);

    iprintf ("Starting waypoint-waypoint tests.\n");

    for (i=0; i<SIZE(wmap); ++i) {
        int_vec_t path;
        INIT(path);
        ret = pathFind(&path, GET(wmap,0).pos, GET(wmap, i).pos,
                       &wmap, &regs);
        iprintf ("RESULT:  %d to %d: ", 0, i);
        for (j=0; j<SIZE(path); ++j) {
            iprintf ("%s (%d) ", points[GET(path,j)].comment, 
                     GET(path,j));
        }
        iprintf ("\n");
    }


    char startbuffer[128];
    char endbuffer[128];
    iprintf ("Interactive mode. Hit Ctrl-C to exit.\n");
    while (true) {
        iprintf ("\nStart: ");
        fgets(startbuffer, 127, stdin);
        startbuffer[127] = 0;
        iprintf ("End: ");
        fgets(endbuffer, 127, stdin);
        endbuffer[127] = 0;

        char *s, *e;
        if (strchr(startbuffer, '\n')) {
            (*strchr(startbuffer, '\n')) = 0;
        }
        if (strchr(endbuffer, '\n')) {
            (*strchr(endbuffer, '\n')) = 0;
        }

        s = startbuffer;
        while (isspace(*s))
            s++;
        e = endbuffer;
        while (isspace(*e))
            e++;
    
    

    
        int start=-1, end=-1;
        for (i=0; i<SIZE(wmap) && start < 0; ++i) {
            if (!strcasecmp(s, points[i].comment)) {
                start = i;
            }
        }

        for (i=0; i<SIZE(wmap) && end < 0; ++i) {
//.........这里部分代码省略.........

static double pathFindWork(int_vec_t *destpath,
                           int pos, int dest,
                           path_bitmap_t seen,
                           const waypoint_vec_t* wmap,
                           const region_map_t* regs) {
    BEGIN_DEPTH;
    int_vec_t wpoints;
    INIT(wpoints);
    assert(pos >=0);
    assert(dest >=0);

    // already there.
    if (pos == dest) {
        END_DEPTH;
        return 0.0;
    }

    if (full_set(&seen)) { 
        END_DEPTH;
        return INFINITY; 
    }

    if (GET(*wmap,pos).distances[dest] != INFINITY) {
        PUSH_BACK(*destpath, dest);
        END_DEPTH;
        return GET(*wmap,pos).distances[dest];
    }

    sortedWaypoints(&wpoints, pos, dest, wmap, regs);
    // remove those we've already seen.
    int j = 0;
    while (j < SIZE(wpoints)) {
        if (is_set(&seen, GET(wpoints,j))) {
            ERASE(wpoints, j);
        }
        else {
            ++j;
        }
    }

    if (SIZE(wpoints) == 0) {
        END_DEPTH;
        return INFINITY; 
    }

    const int offset = SIZE(*destpath);
    int lowest_idx = -1;
    double lowest_value = INFINITY;

    int_vec_t tmp;
    INIT(tmp);
    COPY(tmp, *destpath);
    int i;
    for (i=0; i<SIZE(wpoints); ++i) {
        if (!is_set(&seen, GET(wpoints,i))) {
            double val;

            PUSH_BACK(tmp, GET(wpoints,i));
            path_bitmap_t local_seen = seen;
            set(&local_seen, GET(wpoints,i));
            val = pathFindWork(&tmp, GET(wpoints,i), dest, local_seen, wmap, regs)
                + GET(*wmap,pos).distances[GET(wpoints,i)];

            if (lowest_value == INFINITY 
                || (val != INFINITY && val < lowest_value)) {
                lowest_value = val;
                lowest_idx = GET(wpoints,i);
                COPY(*destpath, tmp);
                END_DEPTH;
                // with this return, it's an A* search.  without, it's
                // a DFS.
                return val;
            } 

            RESIZE(tmp, offset);
        }
    }

    // at the end, destpath has the minimum path we've seen so far,
    // and now we're returning our distance to the path we've appended on.

    END_DEPTH;
    return lowest_value; // + distance(wmap[pos].pos, wmap[lowest_idx].pos, regs);
}

static void
pcre2_printint(pcre2_code *re, FILE *f, BOOL print_lengths)
{
PCRE2_SPTR codestart, nametable, code;
uint32_t nesize = re->name_entry_size;
BOOL utf = (re->overall_options & PCRE2_UTF) != 0;

nametable = (PCRE2_SPTR)((uint8_t *)re + sizeof(pcre2_real_code));
code = codestart = nametable + re->name_count * re->name_entry_size;

for(;;)
  {
  PCRE2_SPTR ccode;
  uint32_t c;
  int i;
  const char *flag = "  ";
  unsigned int extra = 0;

  if (print_lengths)
    fprintf(f, "%3d ", (int)(code - codestart));
  else
    fprintf(f, "    ");

  switch(*code)
    {
/* ========================================================================== */
      /* These cases are never obeyed. This is a fudge that causes a compile-
      time error if the vectors OP_names or OP_lengths, which are indexed
      by opcode, are not the correct length. It seems to be the only way to do
      such a check at compile time, as the sizeof() operator does not work in
      the C preprocessor. */

      case OP_TABLE_LENGTH:
      case OP_TABLE_LENGTH +
        ((sizeof(OP_names)/sizeof(const char *) == OP_TABLE_LENGTH) &&
        (sizeof(OP_lengths) == OP_TABLE_LENGTH)):
      break;
/* ========================================================================== */

    case OP_END:
    fprintf(f, "    %s\n", OP_names[*code]);
    fprintf(f, "------------------------------------------------------------------\n");
    return;

    case OP_CHAR:
    fprintf(f, "    ");
    do
      {
      code++;
      code += 1 + print_char(f, code, utf);
      }
    while (*code == OP_CHAR);
    fprintf(f, "\n");
    continue;

    case OP_CHARI:
    fprintf(f, " /i ");
    do
      {
      code++;
      code += 1 + print_char(f, code, utf);
      }
    while (*code == OP_CHARI);
    fprintf(f, "\n");
    continue;

    case OP_CBRA:
    case OP_CBRAPOS:
    case OP_SCBRA:
    case OP_SCBRAPOS:
    if (print_lengths) fprintf(f, "%3d ", GET(code, 1));
      else fprintf(f, "    ");
    fprintf(f, "%s %d", OP_names[*code], GET2(code, 1+LINK_SIZE));
    break;

    case OP_BRA:
    case OP_BRAPOS:
    case OP_SBRA:
    case OP_SBRAPOS:
    case OP_KETRMAX:
    case OP_KETRMIN:
    case OP_KETRPOS:
    case OP_ALT:
    case OP_KET:
    case OP_ASSERT:
    case OP_ASSERT_NOT:
    case OP_ASSERTBACK:
    case OP_ASSERTBACK_NOT:
    case OP_ONCE:
    case OP_ONCE_NC:
    case OP_COND:
    case OP_SCOND:
    case OP_REVERSE:
    if (print_lengths) fprintf(f, "%3d ", GET(code, 1));
      else fprintf(f, "    ");
    fprintf(f, "%s", OP_names[*code]);
    break;

    case OP_CLOSE:
    fprintf(f, "    %s %d", OP_names[*code], GET2(code, 1));
//.........这里部分代码省略.........

/* MDELEM: Process ELEMENT declaration.
*/
VOID mdelem(UNCH *tbuf)       /* Work area for tokenization (tbuf). */
{
     UNCH *ranksuff = lbuf;   /* Rank suffix. */
     UNS dctype = 0;          /* Declared content type (from dctab). */
     UNCH fmin = 0;           /* Minimization bit flags. */
     int i;                   /* Loop counter. */
     UNS u;                   /* Temporary variable. */
     struct etd **mexgrp, **pexgrp; /* Ptr to model exceptions array. */
     struct thdr *cmod, *cmodsv;    /* Ptr to content model. */
     UNCH *etdgi;             /* GI of current etd (when going through group).*/
     int minomitted = 0;      /*  Tag minimization parameters omitted. */

     mdname = key[KELEMENT];  /* Identify declaration for messages. */
     subdcl = NULL;           /* No subject as yet. */
     parmno = 0;              /* No parameters as yet. */
     mdessv = es;             /* Save es level for entity nesting check. */
     ranksuff[0] = 0;
     mexgrp = pexgrp = 0;

     /* PARAMETER 1: Element name or a group of them.
     */
     parsemd(tbuf, NAMECASE, &pcblitp, NAMELEN);
     TRACEMD("1: element name or grp");
     switch (pcbmd.action) {
     case NAS:
          nmgrp[0] = etddef(tbuf);
          nmgrp[1] = 0;
          break;
     case GRPS:
          parsegrp(nmgrp, &pcbgrnm, tbuf);
          break;
     default:
          mderr(121, (UNCH *)0, (UNCH *)0);
          return;
     }
     /* Save first GI for trace and error messages. */
     if (nmgrp[0])
	  subdcl = nmgrp[0]->etdgi+1;

     /* PARAMETER 1A: Rank suffix (optional).
     */
     parsemd(tbuf, NAMECASE, &pcblitp, NAMELEN);
     TRACEMD("1A: rank suffix");
     switch (pcbmd.action) {
     case NUM:
          ustrcpy(ranksuff, tbuf);
          parsemd(tbuf, NAMECASE, &pcblitp, NAMELEN);
     default:
          break;
     }
     /* PARAMETER 2A: Start-tag minimization.
     */
     TRACEMD("2A: start min");
     switch (pcbmd.action) {
     case CDR:
          break;
     case NAS:
	  if (!ustrcmp(tbuf+1, key[KO])) {
	       if (OMITTAG==YES) SET(fmin, SMO);
	       break;
	  }
	  /* fall through */
     default:
	  if (OMITTAG==NO) {minomitted=1; break;}
          mderr(129, tbuf+1, (UNCH *)0);
          return;
     }
     /* Must omit omitted end-tag minimization, if omitted 
	start-tag minimization was omitted (because OMITTAG == NO). */
     if (!minomitted) {
	  /* PARAMETER 2B: End-tag minimization.
	   */
	  parsemd(tbuf, NAMECASE, &pcblitp, NAMELEN);
	  TRACEMD("2B: end min");
	  switch (pcbmd.action) {
	  case NAS:
	       if (ustrcmp(tbuf+1, key[KO])) {mderr(129, tbuf+1, (UNCH *)0); return;}
	       if (OMITTAG==YES) SET(fmin, EMO);
	       break;
	  case CDR:
	       SET(fmin, EMM);
	       break;
	  default:
	       mderr(129, tbuf+1, (UNCH *)0);
	       return;
	  }
	  /* PARAMETER 3: Declared content.
	   */
	  parsemd(tbuf, NAMECASE, &pcblitp, NAMELEN);
     }
     TRACEMD("3: declared content");
     switch (pcbmd.action) {
     case NAS:
          dctype = mapsrch(dctab, tbuf+1);
          if (!dctype) {mderr(24, tbuf+1, (UNCH *)0); return;}
          /* Eliminate incompatibilities among parameters. */
          if (GET(fmin, SMO) && GET(dctype, MNONE+MCDATA+MRCDATA)) {
               mderr(58, (UNCH *)0, (UNCH *)0);
//.........这里部分代码省略.........