C++ common函数代码示例

static
int attlist7(PROLOG_STATE *state,
             int tok,
             const char *ptr,
             const char *end,
             const ENCODING *enc)
{
    itkExpatUnused(ptr);
    itkExpatUnused(end);
    itkExpatUnused(enc);
    switch (tok) {
    case XML_TOK_PROLOG_S:
        return XML_ROLE_NONE;
    case XML_TOK_CLOSE_PAREN:
        state->handler = attlist8;
        return XML_ROLE_NONE;
    case XML_TOK_OR:
        state->handler = attlist6;
        return XML_ROLE_NONE;
    }
    return common(state, tok);
}

static
int doctype4(PROLOG_STATE *state,
             int tok,
             const char *ptr,
             const char *end,
             const ENCODING *enc)
{
    itkExpatUnused(ptr);
    itkExpatUnused(end);
    itkExpatUnused(enc);
    switch (tok) {
    case XML_TOK_PROLOG_S:
        return XML_ROLE_NONE;
    case XML_TOK_OPEN_BRACKET:
        state->handler = internalSubset;
        return XML_ROLE_DOCTYPE_INTERNAL_SUBSET;
    case XML_TOK_DECL_CLOSE:
        state->handler = prolog2;
        return XML_ROLE_DOCTYPE_CLOSE;
    }
    return common(state, tok);
}

static
int element3(PROLOG_STATE *state,
	     int tok,
	     const char *ptr,
	     const char *end,
	     const ENCODING *enc)
{
  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_NONE;
  case XML_TOK_CLOSE_PAREN:
    state->handler = declClose;
    return XML_ROLE_GROUP_CLOSE;
  case XML_TOK_CLOSE_PAREN_ASTERISK:
    state->handler = declClose;
    return XML_ROLE_GROUP_CLOSE_REP;
  case XML_TOK_OR:
    state->handler = element4;
    return XML_ROLE_NONE;
  }
  return common(state, tok);
}

static
int notation4(PROLOG_STATE *state,
              int tok,
              const char *ptr,
              const char *end,
              const ENCODING *enc)
{
    itkExpatUnused(ptr);
    itkExpatUnused(end);
    itkExpatUnused(enc);
    switch (tok) {
    case XML_TOK_PROLOG_S:
        return XML_ROLE_NONE;
    case XML_TOK_LITERAL:
        state->handler = declClose;
        return XML_ROLE_NOTATION_SYSTEM_ID;
    case XML_TOK_DECL_CLOSE:
        setTopLevel(state);
        return XML_ROLE_NOTATION_NO_SYSTEM_ID;
    }
    return common(state, tok);
}

static
int entity5(PROLOG_STATE *state,
            int tok,
            const char *ptr,
            const char *end,
            const ENCODING *enc)
{
    switch (tok) {
    case XML_TOK_PROLOG_S:
        return XML_ROLE_NONE;
    case XML_TOK_DECL_CLOSE:
        setTopLevel(state);
        return XML_ROLE_ENTITY_COMPLETE;
    case XML_TOK_NAME:
        if (XmlNameMatchesAscii(enc, ptr, end, KW_NDATA)) {
            state->handler = entity6;
            return XML_ROLE_NONE;
        }
        break;
    }
    return common(state, tok);
}

static
int entity0(PROLOG_STATE *state,
            int tok,
            const char *ptr,
            const char *end,
            const ENCODING *enc)
{
    itkExpatUnused(ptr);
    itkExpatUnused(end);
    itkExpatUnused(enc);
    switch (tok) {
    case XML_TOK_PROLOG_S:
        return XML_ROLE_NONE;
    case XML_TOK_PERCENT:
        state->handler = entity1;
        return XML_ROLE_NONE;
    case XML_TOK_NAME:
        state->handler = entity2;
        return XML_ROLE_GENERAL_ENTITY_NAME;
    }
    return common(state, tok);
}

static
int prolog2(PROLOG_STATE *state,
            int tok,
            const char *ptr,
            const char *end,
            const ENCODING *enc)
{
    itkExpatUnused(ptr);
    itkExpatUnused(end);
    itkExpatUnused(enc);
    switch (tok) {
    case XML_TOK_PROLOG_S:
        return XML_ROLE_NONE;
    case XML_TOK_PI:
    case XML_TOK_COMMENT:
        return XML_ROLE_NONE;
    case XML_TOK_INSTANCE_START:
        state->handler = error;
        return XML_ROLE_INSTANCE_START;
    }
    return common(state, tok);
}

// Common transition function. Given a predicate determines if a method should transition to another level.
CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) {
  CompLevel next_level = cur_level;
  int i = method->invocation_count();
  int b = method->backedge_count();

  if (is_trivial(method)) {
    next_level = CompLevel_simple;
  } else {
    switch(cur_level) {
    case CompLevel_none:
      // If we were at full profile level, would we switch to full opt?
      if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) {
        next_level = CompLevel_full_optimization;
      } else if ((this->*p)(i, b, cur_level)) {
        next_level = CompLevel_full_profile;
      }
      break;
    case CompLevel_limited_profile:
    case CompLevel_full_profile:
      {
        MethodData* mdo = method->method_data();
        if (mdo != NULL) {
          if (mdo->would_profile()) {
            int mdo_i = mdo->invocation_count_delta();
            int mdo_b = mdo->backedge_count_delta();
            if ((this->*p)(mdo_i, mdo_b, cur_level)) {
              next_level = CompLevel_full_optimization;
            }
          } else {
            next_level = CompLevel_full_optimization;
          }
        }
      }
      break;
    }
  }
  return MIN2(next_level, (CompLevel)TieredStopAtLevel);
}

static int PTRCALL
condSect0(PROLOG_STATE *state,
          int tok,
          const char *ptr,
          const char *end,
          const ENCODING *enc)
{
  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_NONE;
  case XML_TOK_NAME:
    if (XmlNameMatchesAscii(enc, ptr, end, KW_INCLUDE)) {
      state->handler = condSect1;
      return XML_ROLE_NONE;
    }
    if (XmlNameMatchesAscii(enc, ptr, end, KW_IGNORE)) {
      state->handler = condSect2;
      return XML_ROLE_NONE;
    }
    break;
  }
  return common(state, tok);
}

static int PTRCALL
notation1(PROLOG_STATE *state,
          int tok,
          const char *ptr,
          const char *end,
          const ENCODING *enc)
{
  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_NOTATION_NONE;
  case XML_TOK_NAME:
    if (XmlNameMatchesAscii(enc, ptr, end, KW_SYSTEM)) {
      state->handler = notation3;
      return XML_ROLE_NOTATION_NONE;
    }
    if (XmlNameMatchesAscii(enc, ptr, end, KW_PUBLIC)) {
      state->handler = notation2;
      return XML_ROLE_NOTATION_NONE;
    }
    break;
  }
  return common(state, tok);
}

static
int attlist1(PROLOG_STATE *state,
             int tok,
             const char *ptr,
             const char *end,
             const ENCODING *enc)
{
  cmExpatUnused(ptr);
  cmExpatUnused(end);
  cmExpatUnused(enc);
  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_NONE;
  case XML_TOK_DECL_CLOSE:
    setTopLevel(state);
    return XML_ROLE_NONE;
  case XML_TOK_NAME:
  case XML_TOK_PREFIXED_NAME:
    state->handler = attlist2;
    return XML_ROLE_ATTRIBUTE_NAME;
  }
  return common(state, tok);
}

static int PTRCALL
attlist7(PROLOG_STATE *state,
         int tok,
         const char *ptr,
         const char *end,
         const ENCODING *enc)
{
  UNUSED(ptr);
  UNUSED(end);
  UNUSED(enc);

  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_ATTLIST_NONE;
  case XML_TOK_CLOSE_PAREN:
    state->handler = attlist8;
    return XML_ROLE_ATTLIST_NONE;
  case XML_TOK_OR:
    state->handler = attlist6;
    return XML_ROLE_ATTLIST_NONE;
  }
  return common(state, tok);
}

static int PTRCALL
prolog1(PROLOG_STATE *state,
        int tok,
        const char *ptr,
        const char *end,
        const ENCODING *enc)
{
  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_NONE;
  case XML_TOK_PI:
    return XML_ROLE_PI;
  case XML_TOK_COMMENT:
    return XML_ROLE_COMMENT;
  case XML_TOK_BOM:
    /* This case can never arise.  To reach this role function, the
     * parse must have passed through prolog0 and therefore have had
     * some form of input, even if only a space.  At that point, a
     * byte order mark is no longer a valid character (though
     * technically it should be interpreted as a non-breaking space),
     * so will be rejected by the tokenizing stages.
     */
    return XML_ROLE_NONE; /* LCOV_EXCL_LINE */
  case XML_TOK_DECL_OPEN:
    if (!XmlNameMatchesAscii(enc,
                             ptr + 2 * MIN_BYTES_PER_CHAR(enc),
                             end,
                             KW_DOCTYPE))
      break;
    state->handler = doctype0;
    return XML_ROLE_DOCTYPE_NONE;
  case XML_TOK_INSTANCE_START:
    state->handler = error;
    return XML_ROLE_INSTANCE_START;
  }
  return common(state, tok);
}

static bool readjson_len(struct req *req, int len)
{
	char buf[BUFSIZ];
	xstr *xs = xstr_create("", req);
	json *js;

	if (len < 0) {
		while (fgets(buf, sizeof(buf), stdin)) {
			if (!buf[0] || buf[0] == '\n') break;
			xstr_append(xs, buf);
		}
	} else {
		int r;

		while ((r = fread(buf, 1, MIN(len, sizeof(buf)), stdin))) {
			if (r < 0) {
				dbg(5, "fread() returned %d, len=%d\n", r, len);
				break;
			}

			/* always appends \0 */
			xstr_append_size(xs, buf, r);

			len -= r;
			if (len <= 0)
				break;
		}
	}

	/* eof? */
	if (xstr_length(xs) == 0) exit(0);

	js = json_create(req);
	req->params = json_parse(js, xstr_string(xs));

	return common(req, false);
}

static int PTRCALL
element5(PROLOG_STATE *state,
         int tok,
         const char *ptr,
         const char *end,
         const ENCODING *enc)
{
  UNUSED(ptr);
  UNUSED(end);
  UNUSED(enc);

  switch (tok) {
  case XML_TOK_PROLOG_S:
    return XML_ROLE_ELEMENT_NONE;
  case XML_TOK_CLOSE_PAREN_ASTERISK:
    state->handler = declClose;
    state->role_none = XML_ROLE_ELEMENT_NONE;
    return XML_ROLE_GROUP_CLOSE_REP;
  case XML_TOK_OR:
    state->handler = element4;
    return XML_ROLE_ELEMENT_NONE;
  }
  return common(state, tok);
}