Linux Manuals session 3

QuantLib::Problem – Constrained optimization problem. Synopsis#include <ql/math/optimization/problem.hpp> Public Member FunctionsProblem (CostFunction &costFunction, Constraint &constraint, const Array &initialValue=Array()) default constructor void reset () Real value (const Array &x) call cost function computation and increment evaluation counter Disposable< Array > values (const Array &x) call cost values computation and increment evaluation counter void gradient (Array &grad_f, const…

QuantLib::Problem – Constrained optimization problem. Synopsis#include <ql/math/optimization/problem.hpp> Public Member FunctionsProblem (CostFunction &costFunction, Constraint &constraint, const Array &initialValue=Array()) default constructor void reset () Real value (const Array &x) call cost function computation and increment evaluation counter Disposable< Array > values (const Array &x) call cost values computation and increment evaluation counter void gradient (Array &grad_f, const…

QuantLib::EndCriteria – Criteria to end optimization process:. Synopsis#include <ql/math/optimization/endcriteria.hpp> Public Typesenum Type { None, MaxIterations, StationaryPoint, StationaryFunctionValue, StationaryFunctionAccuracy, ZeroGradientNorm, Unknown } Public Member FunctionsEndCriteria (Size maxIterations, Size maxStationaryStateIterations, Real rootEpsilon, Real functionEpsilon, Real gradientNormEpsilon) Initialization constructor. Size maxIterations () const Size maxStationaryStateIterations () const Real rootEpsilon () const Real functionEpsilon () const Real gradientNormEpsilon ()…

QuantLib::EndCriteria – Criteria to end optimization process:. Synopsis#include <ql/math/optimization/endcriteria.hpp> Public Typesenum Type { None, MaxIterations, StationaryPoint, StationaryFunctionValue, StationaryFunctionAccuracy, ZeroGradientNorm, Unknown } Public Member FunctionsEndCriteria (Size maxIterations, Size maxStationaryStateIterations, Real rootEpsilon, Real functionEpsilon, Real gradientNormEpsilon) Initialization constructor. Size maxIterations () const Size maxStationaryStateIterations () const Real rootEpsilon () const Real functionEpsilon () const Real gradientNormEpsilon ()…

FunColumnSelect – select Funtools columns Synopsis #include <funtools.h> int FunColumnSelect(Fun fun, int size, char *plist, char *name1, char *type1, char *mode1, int offset1, char *name2, char *type2, char *mode2, int offset2, …, NULL) int FunColumnSelectArr(Fun fun, int size, char *plist, char **names, char **types, char **modes, int *offsets, int nargs);DescriptionThe FunColumnSelect() routine is used to…

FunColumnLookup – lookup a Funtools column Synopsis #include <funtools.h> int FunColumnLookup(Fun fun, char *s, int which, char **name, int *type, int *mode, int *offset, int *n, int *width)DescriptionThe FunColumnLookup() routine returns information about a named (or indexed) column. The first argument is the Fun handle associated with this set of columns. The second argument is…

FunColumnActivate – activate Funtools columns Synopsis #include <funtools.h> void FunColumnActivate(Fun fun, char *s, char *plist)DescriptionThe FunColumnActivate() routine determines which columns (set up by FunColumnSelect()) ultimately will be read and/or written. By default, all columns that are selected using FunColumnSelect() are activated. The FunColumnActivate() routine can be used to turn off/off activation of specific columns. The…

FunClose – close a Funtools data file Synopsis #include <funtools.h> void FunClose(Fun fun)DescriptionThe FunClose() routine closes a previously-opened Funtools data file, freeing control structures. If a Funtools reference handle was passed to the FunOpen() call for this file, and if copy mode also was specified for that file, then FunClose() also will copy the remaining…

ftw, nftw – file tree walk Synopsis#include <ftw.h> int nftw(const char *dirpath, int (*fn) (const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf), int nopenfd, int flags); #include <ftw.h> int ftw(const char *dirpath, int (*fn) (const char *fpath, const struct stat *sb, int typeflag), int nopenfd);Feature Test Macro Requirements for glibc (see…

fts, fts_open, fts_read, fts_children, fts_set, fts_close – traverse a file hierarchy Synopsis#include <sys/types.h> #include <sys/stat.h> #include <fts.h> FTS *fts_open(char * const *path_argv, int options, int (*compar)(const FTSENT **, const FTSENT **)); FTSENT *fts_read(FTS *ftsp); FTSENT *fts_children(FTS *ftsp, int instr); int fts_set(FTS *ftsp, FTSENT *f, int instr); int fts_close(FTS *ftsp);DescriptionThe fts functions are provided for traversing…

fts, fts_open, fts_read, fts_children, fts_set, fts_close – traverse a file hierarchy Synopsis#include <sys/types.h> #include <sys/stat.h> #include <fts.h> FTS *fts_open(char * const *path_argv, int options, int (*compar)(const FTSENT **, const FTSENT **)); FTSENT *fts_read(FTS *ftsp); FTSENT *fts_children(FTS *ftsp, int instr); int fts_set(FTS *ftsp, FTSENT *f, int instr); int fts_close(FTS *ftsp);DescriptionThe fts functions are provided for traversing…

fts, fts_open, fts_read, fts_children, fts_set, fts_close – traverse a file hierarchy Synopsis#include <sys/types.h> #include <sys/stat.h> #include <fts.h> FTS *fts_open(char * const *path_argv, int options, int (*compar)(const FTSENT **, const FTSENT **)); FTSENT *fts_read(FTS *ftsp); FTSENT *fts_children(FTS *ftsp, int instr); int fts_set(FTS *ftsp, FTSENT *f, int instr); int fts_close(FTS *ftsp);DescriptionThe fts functions are provided for traversing…

fts, fts_open, fts_read, fts_children, fts_set, fts_close – traverse a file hierarchy Synopsis#include <sys/types.h> #include <sys/stat.h> #include <fts.h> FTS *fts_open(char * const *path_argv, int options, int (*compar)(const FTSENT **, const FTSENT **)); FTSENT *fts_read(FTS *ftsp); FTSENT *fts_children(FTS *ftsp, int instr); int fts_set(FTS *ftsp, FTSENT *f, int instr); int fts_close(FTS *ftsp);DescriptionThe fts functions are provided for traversing…

fts, fts_open, fts_read, fts_children, fts_set, fts_close – traverse a file hierarchy Synopsis#include <sys/types.h> #include <sys/stat.h> #include <fts.h> FTS *fts_open(char * const *path_argv, int options, int (*compar)(const FTSENT **, const FTSENT **)); FTSENT *fts_read(FTS *ftsp); FTSENT *fts_children(FTS *ftsp, int instr); int fts_set(FTS *ftsp, FTSENT *f, int instr); int fts_close(FTS *ftsp);DescriptionThe fts functions are provided for traversing…

fts, fts_open, fts_read, fts_children, fts_set, fts_close – traverse a file hierarchy Synopsis#include <sys/types.h> #include <sys/stat.h> #include <fts.h> FTS *fts_open(char * const *path_argv, int options, int (*compar)(const FTSENT **, const FTSENT **)); FTSENT *fts_read(FTS *ftsp); FTSENT *fts_children(FTS *ftsp, int instr); int fts_set(FTS *ftsp, FTSENT *f, int instr); int fts_close(FTS *ftsp);DescriptionThe fts functions are provided for traversing…

flockfile, ftrylockfile, funlockfile – lock FILE for stdio Synopsis#include <stdio.h> void flockfile(FILE *filehandle); int ftrylockfile(FILE *filehandle); void funlockfile(FILE *filehandle);Feature Test Macro Requirements for glibc (see feature_test_macros(7)): All functions shown above: /* Since glibc 2.24: */ _POSIX_C_SOURCE >= 199309L     || /* Glibc versions <= 2.23: */ _POSIX_C_SOURCE     || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCEDescriptionThe stdio functions are thread-safe. This is achieved by assigning to each FILE object a…

ftok – convert a pathname and a project identifier to a System V IPC key Synopsis#include <sys/types.h> #include <sys/ipc.h>key_t ftok(const char *pathname, int proj_id); DescriptionThe ftok() function uses the identity of the file named by the given pathname (which must refer to an existing, accessible file) and the least significant 8 bits of proj_id (which…

ftofix – Converts a floating point value to fixed point. Allegro game programming library. Synopsis#include <allegro.h> fixed ftofix(double x); DescriptionConverts a floating point value to fixed point. Unlike itofix(), this function clamps values which could overflow the type conversion, setting `errno’ to ERANGE in the process if this happens. Example: fixed number; number = itofix(-40000);…

ftime – return date and time Synopsis#include <sys/timeb.h> int ftime(struct timeb *tp); DescriptionNOTE: This function is deprecated, and will be removed in a future version of the GNU C library. Use clock_gettime(2) instead. This function returns the current time as seconds and milliseconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). The time is returned in…

fseeko, ftello – seek to or report file position Synopsis#include <stdio.h> int fseeko(FILE *stream, off_t offset, int whence); off_t ftello(FILE *stream);Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fseeko(), ftello(): _FILE_OFFSET_BITS == 64 || _POSIX_C_SOURCE >= 200112L (defining the obsolete _LARGEFILE_SOURCE macro also works)DescriptionThe fseeko() and ftello() functions are identical to fseek(3) and ftell(3) (see fseek(3)), respectively, except that…