C++ parse_integer函数代码示例

cmd_result_t
cmd_xmem(int unit, args_t *a)
{
    char          *token;
    unsigned int   addr, data;

    if ((token = ARG_GET(a)) == NULL) {
        return CMD_USAGE;
    }

    if (sal_strcasecmp(token, "r") == 0) {
        if ((token = ARG_GET(a)) == NULL) {
            return CMD_USAGE;
        }
        addr = parse_integer(token);
        cli_out("0x%x: %08x\n", addr, *((unsigned int *)(INT_TO_PTR(addr))));
    } else if (sal_strcasecmp(token, "w") == 0) {
        if ((token = ARG_GET(a)) == NULL) {
            return CMD_USAGE;
        }
        addr = parse_integer(token);
        if ((token = ARG_GET(a)) == NULL) {
            return CMD_USAGE;
        }
        data = parse_integer(token);
        *((unsigned int *)(INT_TO_PTR(addr))) = data;
    } else {
        cli_out(cmd_xmem_usage);
        return CMD_FAIL;
    }
    return CMD_OK;
}

DSA *DSA_parse_private_key(CBS *cbs) {
  DSA *ret = DSA_new();
  if (ret == NULL) {
    return NULL;
  }

  CBS child;
  uint64_t version;
  if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
      !CBS_get_asn1_uint64(&child, &version)) {
    OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
    goto err;
  }

  if (version != 0) {
    OPENSSL_PUT_ERROR(DSA, DSA_R_BAD_VERSION);
    goto err;
  }

  if (!parse_integer(&child, &ret->p) ||
      !parse_integer(&child, &ret->q) ||
      !parse_integer(&child, &ret->g) ||
      !parse_integer(&child, &ret->pub_key) ||
      !parse_integer(&child, &ret->priv_key) ||
      CBS_len(&child) != 0) {
    OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
    goto err;
  }
  return ret;

err:
  DSA_free(ret);
  return NULL;
}

cmd_result_t
cmd_setfanspeed(int unit, args_t *a)
{
	char *d = ARG_GET(a);
	char *s = ARG_GET(a);
	int devno = -1, speed = -1;
	int retv;

	if (!sh_check_attached(ARG_CMD(a), unit))
		return CMD_FAIL;

	if (d) {
		devno = parse_integer(d);
	}
	if (s) {
		speed = parse_integer(s);
	}
	if ((devno < 0) || (devno > 7) || (speed < 0) || (speed > 15)) {
		return CMD_USAGE;
	}

	retv = soc_bsc_max6653_set(unit, devno, speed);
	if (retv) {
		sal_printf("%s failed\n", FUNCTION_NAME());
		return CMD_FAIL;
	}

	return CMD_OK;
}

static cairo_bool_t
resource_parse_line (char *name, cairo_xcb_resources_t *resources)
{
    char *value;

    value = strchr (name, ':');
    if (value == NULL)
	return FALSE;

    *value++ = 0;

    name = skip_spaces (name);
    value = skip_spaces (value);

    if (strcmp (name, "Xft.antialias") == 0)
	parse_boolean (value, &(resources->xft_antialias));
    else if (strcmp (name, "Xft.lcdfilter") == 0)
	parse_integer (value, &(resources->xft_lcdfilter));
    else if (strcmp (name, "Xft.rgba") == 0)
	parse_integer (value, &(resources->xft_rgba));
    else if (strcmp (name, "Xft.hinting") == 0)
	parse_boolean (value, &(resources->xft_hinting));
    else if (strcmp (name, "Xft.hintstyle") == 0)
	parse_integer (value, &(resources->xft_hintstyle));

    return TRUE;
}

/**
 * Parse environment variables
 */
void parse_environment_vars(parallel_wrapper *par_wrapper)
{
	char *value = NULL;
	value = getenv("_CONDOR_PROCNO");
	parse_integer(value, &par_wrapper -> this_machine -> rank);

	value = getenv("_CONDOR_NPROCS");
	parse_integer(value, &par_wrapper -> num_procs);

	return;
}

/**
 * The "pxebs" command
 *
 * @v argc		Argument count
 * @v argv		Argument list
 * @ret rc		Return status code
 */
static int pxebs_exec ( int argc, char **argv ) {
	struct pxebs_options opts;
	struct net_device *netdev;
	unsigned int pxe_type;
	int rc;

	/* Parse options */
	if ( ( rc = parse_options ( argc, argv, &pxebs_cmd, &opts ) ) != 0 )
		return rc;

	/* Parse net device name */
	if ( ( rc = parse_netdev ( argv[optind], &netdev ) ) != 0 )
		return rc;

	/* Parse boot server type */
	if ( ( rc = parse_integer ( argv[ optind + 1 ], &pxe_type ) ) != 0 )
		return rc;

	/* Perform Boot Server Discovery */
	if ( ( rc = pxebs ( netdev, pxe_type ) ) != 0 ) {
		printf ( "Could not discover boot server on %s: %s\n",
			 netdev->name, strerror ( rc ) );
		return rc;
	}

	return 0;
}

/** Retrieve the amount of quote remaining to a player.
 * Figure out a player's quota. Add the RQUOTA attribute if he doesn't
 * have one already. This function returns the REMAINING quota, not
 * the TOTAL limit.
 * \param who player to check.
 * \return player's remaining quota.
 */
int
get_current_quota(dbref who)
{
  ATTR *a;
  int i;
  int limit;
  int owned = 0;

  /* if he's got an RQUOTA attribute, his remaining quota is that */
  a = atr_get_noparent(Owner(who), "RQUOTA");
  if (a)
    return parse_integer(atr_value(a));

  /* else, count up his objects. If he has less than the START_QUOTA,
   * then his remaining quota is that minus his number of current objects.
   * Otherwise, it's his current number of objects. Add the attribute
   * if he doesn't have it.
   */

  for (i = 0; i < db_top; i++)
    if (Owner(i) == Owner(who))
      owned++;
  owned--;                      /* don't count the player himself */

  if (owned <= START_QUOTA)
    limit = START_QUOTA - owned;
  else
    limit = owned;

  (void) atr_add(Owner(who), "RQUOTA", tprintf("%d", limit), GOD, 0);

  return limit;
}

static json_t *parse_value(stream_t *stream, size_t flags, json_error_t *error)
{
    json_t *result = NULL;
    char *string;
    int c = stream_peek(stream);

    switch (c) {
    case 'd':
        result = parse_dict(stream, flags, error);
        break;
    case 'l':
        result = parse_list(stream, flags, error);
        break;
    case 'i':
        stream_getc(stream);
        result = parse_integer(stream, flags, error);
        break;
    case EOF:
        error_set(error, stream, "unexpected EOF");
        break;
    default:
        if (json_isdigit(c)) {
            string = parse_string(stream, flags, error);
            if (string) {
                result = json_string_nocheck(string);
                jsonp_free(string);
            }
        } else {
            error_set(error, stream, "invalid character: %c", c);
        }
    }
    return result;
}

/**
 * Parse the number term 's' and return its resulting value in 'value'.
 * Return a pointer behind the last character of the expression.
 * Return NULL if a syntax error occurred.
 */
char *parse_number_term(char *s, int *value) {
  unsigned char token;
  s = skip_whitespace(s);
  token = next_token(s);
  if (token == TOKEN_DIGITS || token == TOKEN_PLUS || token == TOKEN_MINUS) {
    if (s = parse_integer(s, value)) {
      return s;
    } else {
      syntax_error_invalid_number();
    }
  } else if (token == TOKEN_VAR_NUMBER) {
    unsigned int var_name;
    unsigned char var_type;
    variable *var;
    s = parse_variable(s, &var_name, &var_type);
    var = find_variable(var_name, VAR_TYPE_INTEGER, NULL);
    if (var) {
      *value = get_integer_variable_value(var);
      return s;
    } else {
      syntax_error_msg("Variable not found");
    }
  } else {
    syntax_error();
  }

  return NULL;
}

/** qsort() comparision routine used by sortby() */
int
u_comp(const void *s1, const void *s2)
{
  char result[BUFFER_LEN], *rp;
  char const *tbuf;
  int n;

  /* Our two arguments are passed as %0 and %1 to the sortby u-function. */

  /* Note that this function is for use in conjunction with our own
   * sane_qsort routine, NOT with the standard library qsort!
   */
  global_eval_context.wenv[0] = (char *) s1;
  global_eval_context.wenv[1] = (char *) s2;

  /* Run the u-function, which should return a number. */

  tbuf = ucomp_buff;
  rp = result;
  if (process_expression(result, &rp, &tbuf,
                         ucomp_executor, ucomp_caller, ucomp_enactor,
                         PE_DEFAULT, PT_DEFAULT, ucomp_pe_info))
    return 0;
  n = parse_integer(result);

  return n;
}

uintmax_t
parse_integer (const char *str, gboolean * invalid)
{
    uintmax_t n;
    char *suffix;
    strtol_error_t e;

    e = xstrtoumax (str, &suffix, 10, &n, "bcEGkKMPTwYZ0");
    if (e == LONGINT_INVALID_SUFFIX_CHAR && *suffix == 'x')
    {
        uintmax_t multiplier;

        multiplier = parse_integer (suffix + 1, invalid);
        if (multiplier != 0 && n * multiplier / multiplier != n)
        {
            *invalid = TRUE;
            return 0;
        }

        n *= multiplier;
    }
    else if (e != LONGINT_OK)
    {
        *invalid = TRUE;
        n = 0;
    }

    return n;
}

static struct buffer parse_value(struct buffer buff,
      struct rmsgpack_dom_value *value, const char **error)
{
   buff = chomp(buff);

   if (peek(buff, "nil"))
   {
      buff.offset += strlen("nil");
      value->type = RDT_NULL;
   }
   else if (peek(buff, "true"))
   {
      buff.offset += strlen("true");
      value->type = RDT_BOOL;
      value->val.bool_ = 1;
   }
   else if (peek(buff, "false"))
   {
      buff.offset += strlen("false");
      value->type = RDT_BOOL;
      value->val.bool_ = 0;
   }
   else if (peek(buff, "b") || peek(buff, "\"") || peek(buff, "'"))
      buff = parse_string(buff, value, error);
   else if (isdigit((int)buff.data[buff.offset]))
      buff = parse_integer(buff, value, error);
   return buff;
}

RSA *RSA_parse_public_key(CBS *cbs) {
  RSA *ret = RSA_new();
  if (ret == NULL) {
    return NULL;
  }
  CBS child;
  if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
      !parse_integer(&child, &ret->n) ||
      !parse_integer(&child, &ret->e) ||
      CBS_len(&child) != 0) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_BAD_ENCODING);
    RSA_free(ret);
    return NULL;
  }
  return ret;
}

DSA_SIG *DSA_SIG_parse(CBS *cbs) {
  DSA_SIG *ret = DSA_SIG_new();
  if (ret == NULL) {
    return NULL;
  }
  CBS child;
  if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
      !parse_integer(&child, &ret->r) ||
      !parse_integer(&child, &ret->s) ||
      CBS_len(&child) != 0) {
    OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
    DSA_SIG_free(ret);
    return NULL;
  }
  return ret;
}

	void OrderPropertyParser::parse(StylePropertySetter *setter, const std::string &name, StyleParser &parser)
	{
		auto &tokens = parser.tokens;

		StyleSetValue order;

		size_t pos = 0;
		StyleToken token = next_token(pos, tokens);
		if (token.type == StyleTokenType::ident && pos == tokens.size())
		{
			if (equals(token.value, "inherit"))
				order = StyleSetValue::from_keyword("inherit");
			else
				return;
		}
		else if (token.type == StyleTokenType::number && pos == tokens.size())
		{
			int value = 0;
			if (parse_integer(token.value, value))
			{
				order = StyleSetValue::from_number((float)value);
			}
			else
			{
				return;
			}
		}
		else
		{
			return;
		}

		setter->set_value("order", order);
	}