SysTutorials Posts

ipq_read — read queue messages from ip_queue and read into supplied buffer Synopsis#include <linux/netfilter.h> #include <libipq.h> ssize_t ipq_read(const struct ipq_handle *h, unsigned char *buf, size_t len, int timeout); DescriptionThe ipq_read function reads a queue message from the kernel and copies it to the memory pointed to by buf to a maximum length of len. The…

ipq_errstr, ipq_perror — libipq error handling routines Synopsis#include <linux/netfilter.h> #include <libipq.h> char *ipq_errstr(void); void ipq_perror(const char *s); DescriptionThe ipq_errstr function returns a descriptive error message based on the current value of the internal ipq_errno variable. All libipq API functions set this internal variable upon failure. The ipq_perror function prints an error message to stderr corresponding…

ipq_message_type, ipq_get_packet, ipq_getmsgerr — query queue messages Synopsis#include <linux/netfilter.h> #include <libipq.h> int ipq_message_type(const unsigned char *buf); ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf); int ipq_get_msgerr(const unsigned char *buf); DescriptionThe ipq_message_type function returns the type of queue message returned to userspace via ipq_read. ipq_message_type should always be called following a successful call to ipq_read to determine whether the…

ipq_message_type, ipq_get_packet, ipq_getmsgerr — query queue messages Synopsis#include <linux/netfilter.h> #include <libipq.h> int ipq_message_type(const unsigned char *buf); ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf); int ipq_get_msgerr(const unsigned char *buf); DescriptionThe ipq_message_type function returns the type of queue message returned to userspace via ipq_read. ipq_message_type should always be called following a successful call to ipq_read to determine whether the…

ipq_message_type, ipq_get_packet, ipq_getmsgerr — query queue messages Synopsis#include <linux/netfilter.h> #include <libipq.h> int ipq_message_type(const unsigned char *buf); ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf); int ipq_get_msgerr(const unsigned char *buf); DescriptionThe ipq_message_type function returns the type of queue message returned to userspace via ipq_read. ipq_message_type should always be called following a successful call to ipq_read to determine whether the…

ipq_errstr, ipq_perror — libipq error handling routines Synopsis#include <linux/netfilter.h> #include <libipq.h> char *ipq_errstr(void); void ipq_perror(const char *s); DescriptionThe ipq_errstr function returns a descriptive error message based on the current value of the internal ipq_errno variable. All libipq API functions set this internal variable upon failure. The ipq_perror function prints an error message to stderr corresponding…

ipq_create_handle, ipq_destroy_handle — create and destroy libipq handles. Synopsis#include <linux/netfilter.h> #include <libipq.h> struct ipq_handle *ipq_create_handle(u_int32_t flags, u_int32_t protocol); int ipq_destroy_handle(struct ipq_handle *h); DescriptionThe ipq_create_handle function initialises libipq for an application, attempts to bind to the Netlink socket used by ip_queue, and returns an opaque context handle. It should be the first libipq function to be…

ipq_create_handle, ipq_destroy_handle — create and destroy libipq handles. Synopsis#include <linux/netfilter.h> #include <libipq.h> struct ipq_handle *ipq_create_handle(u_int32_t flags, u_int32_t protocol); int ipq_destroy_handle(struct ipq_handle *h); DescriptionThe ipq_create_handle function initialises libipq for an application, attempts to bind to the Netlink socket used by ip_queue, and returns an opaque context handle. It should be the first libipq function to be…

iparmq.f – SynopsisFunctions/SubroutinesINTEGER function iparmq (ISPEC, NAME, OPTS, N, ILO, IHI, LWORK) IPARMQ Function/Subroutine DocumentationINTEGER function iparmq (integerISPEC, character, dimension( * )NAME, character, dimension( * )OPTS, integerN, integerILO, integerIHI, integerLWORK)IPARMQ Purpose: This program sets problem and machine dependent parameters useful for xHSEQR and its subroutines. It is called whenever ILAENV is called with 12 <=…

io.h – C wrapper for I/O interfaces. Synopsis#include ‘dmlite.h’ #include ‘any.h’ #include ‘pool.h’ #include <sys/uio.h> #include <unistd.h> Macros#define O_INSECURE 010 Typedefstypedef struct dmlite_fd dmlite_fd Functionsdmlite_fd * dmlite_fopen (dmlite_context *context, const char *path, int flags, const dmlite_any_dict *extra,…) Opens a file. int dmlite_fclose (dmlite_fd *fd) Closes a file. int dmlite_fstat (dmlite_fd *fd, struct stat *buf) Gets…

QuantLib::OneFactorCopula – Abstract base class for one-factor copula models. Synopsis#include <ql/experimental/credit/onefactorcopula.hpp> Inherits QuantLib::LazyObject. Inherited by OneFactorGaussianCopula, OneFactorGaussianStudentCopula, OneFactorStudentCopula, and OneFactorStudentGaussianCopula. Public Member FunctionsOneFactorCopula (const Handle< Quote > &correlation, Real maximum=5, Size integrationSteps=50) virtual Real density (Real m) const =0 Density function of M. virtual Real cumulativeZ (Real z) const =0 Cumulative distribution of Z. virtual…

QuantLib::Matrix – Matrix used in linear algebra. Synopsis#include <ql/math/matrix.hpp> Inherited by Disposable< Matrix >. Public Typestypedef Real * iterator typedef const Real * const_iterator typedef boost::reverse_iterator< iterator > reverse_iterator typedef boost::reverse_iterator< const_iterator > const_reverse_iterator typedef Real * row_iterator typedef const Real * const_row_iterator typedef boost::reverse_iterator< row_iterator > reverse_row_iterator typedef boost::reverse_iterator< const_row_iterator > const_reverse_row_iterator typedef step_iterator<…

intro – introduction to library functions DescriptionSection 3 of the manual describes all library functions excluding the library functions (system call wrappers) described in Section 2, which implement system calls. Many of the functions described in the section are part of the Standard C Library (libc). Some functions are part of other libraries (e.g., the…

QuantLib::FDVanillaEngine – Finite-differences pricing engine for BSM one asset options. Synopsis#include <ql/pricingengines/vanilla/fdvanillaengine.hpp> Inherited by FDEuropeanEngine, FDMultiPeriodEngine, and FDStepConditionEngine. Public Member FunctionsFDVanillaEngine (const boost::shared_ptr< GeneralizedBlackScholesProcess > &process, Size timeSteps, Size gridPoints, bool timeDependent=false) const Array & grid () const Protected Typestypedef BoundaryCondition< TridiagonalOperator > bc_type Protected Member Functionsvirtual void setupArguments (const PricingEngine::arguments *) const virtual void…

system_data_types – overview of system data types Descriptionaiocb Include: <aio.h>. struct aiocb {     int             aio_fildes;    /* File descriptor */     off_t           aio_offset;    /* File offset */     volatile void  *aio_buf;       /* Location of buffer */     size_t          aio_nbytes;    /* Length of transfer */     int             aio_reqprio;   /* Request priority offset */     struct sigevent aio_sigevent;  /* Signal number and value */     int             aio_lio_opcode;/* Operation to be performed */ }; For further information about this structure, see aio(7). Conforming to: POSIX.1-2001 and later. See also: aio_cancel(3), aio_error(3),…

system_data_types – overview of system data types Descriptionaiocb Include: <aio.h>. struct aiocb {     int             aio_fildes;    /* File descriptor */     off_t           aio_offset;    /* File offset */     volatile void  *aio_buf;       /* Location of buffer */     size_t          aio_nbytes;    /* Length of transfer */     int             aio_reqprio;   /* Request priority offset */     struct sigevent aio_sigevent;  /* Signal number and value */     int             aio_lio_opcode;/* Operation to be performed */ }; For further information about this structure, see aio(7). Conforming to: POSIX.1-2001 and later. See also: aio_cancel(3), aio_error(3),…

QuantLib::DateInterval – Date interval described by a number of a given time unit. Synopsis#include <ql/experimental/commodities/dateinterval.hpp> Inherited by PricingPeriod. Public Member FunctionsDateInterval (const Date &startDate, const Date &endDate) const Date & startDate () const const Date & endDate () const bool isDateBetween (Date date, bool includeFirst=true, bool includeLast=true) const DateInterval intersection (const DateInterval &di) const bool…

QuantLib::PiecewiseDefaultCurve – Piecewise default-probability term structure. Synopsis#include <ql/termstructures/credit/piecewisedefaultcurve.hpp> Inherits Traits::template curve::type<Interpolator>, and QuantLib::LazyObject. Public Typestypedef Traits traits_type typedef Interpolator interpolator_type Public Member FunctionsConstructors PiecewiseDefaultCurve (const Date &referenceDate, const std::vector< boost::shared_ptr< typename Traits::helper > > &instruments, const DayCounter &dayCounter, Real accuracy=1.0e-12, const Interpolator &i=Interpolator()) PiecewiseDefaultCurve (Natural settlementDays, const Calendar &calendar, const std::vector< boost::shared_ptr< typename Traits::helper >…

QuantLib::CommodityCurve – Commodity term structure. Synopsis#include <ql/experimental/commodities/commoditycurve.hpp> Inherits QuantLib::TermStructure. Public Member FunctionsCommodityCurve (const std::string &name, const CommodityType &commodityType, const Currency &currency, const UnitOfMeasure &unitOfMeasure, const Calendar &calendar, const std::vector< Date > &dates, const std::vector< Real > &prices, const DayCounter &dayCounter=Actual365Fixed()) CommodityCurve (const std::string &name, const CommodityType &commodityType, const Currency &currency, const UnitOfMeasure &unitOfMeasure, const Calendar…

QuantLib::CommodityCurve – Commodity term structure. Synopsis#include <ql/experimental/commodities/commoditycurve.hpp> Inherits QuantLib::TermStructure. Public Member FunctionsCommodityCurve (const std::string &name, const CommodityType &commodityType, const Currency &currency, const UnitOfMeasure &unitOfMeasure, const Calendar &calendar, const std::vector< Date > &dates, const std::vector< Real > &prices, const DayCounter &dayCounter=Actual365Fixed()) CommodityCurve (const std::string &name, const CommodityType &commodityType, const Currency &currency, const UnitOfMeasure &unitOfMeasure, const Calendar…