Section 3: library functions
closedir – close a directory Synopsis#include <sys/types.h> #include <dirent.h> int closedir(DIR *dirp);DescriptionThe closedir() function closes the directory stream associated with dirp. A successful call to closedir() also closes the underlying file descriptor associated with dirp. The directory stream descriptor dirp is not available after this call. Return ValueThe closedir() function returns 0 on success. On…
ql/math/comparison.hpp – floating-point comparisons Synopsis#include <ql/types.hpp> #include <boost/shared_ptr.hpp> Functionsbool close (Real x, Real y) bool close (Real x, Real y, Size n) bool close_enough (Real x, Real y) bool close_enough (Real x, Real y, Size n) Detailed Descriptionfloating-point comparisons AuthorGenerated automatically by Doxygen for QuantLib from the source code.
ql/math/comparison.hpp – floating-point comparisons Synopsis#include <ql/types.hpp> #include <boost/shared_ptr.hpp> Functionsbool close (Real x, Real y) bool close (Real x, Real y, Size n) bool close_enough (Real x, Real y) bool close_enough (Real x, Real y, Size n) Detailed Descriptionfloating-point comparisons AuthorGenerated automatically by Doxygen for QuantLib from the source code.
clog, clogf, clogl – natural logarithm of a complex number Synopsis#include <complex.h> double complex clog(double complex z); float complex clogf(float complex z); long double complex clogl(long double complex z); Link with -lm. DescriptionThese functions calculate the complex natural logarithm of z, with a branch cut along the negative real axis. The logarithm clog() is the…
clog, clogf, clogl – natural logarithm of a complex number Synopsis#include <complex.h> double complex clog(double complex z); float complex clogf(float complex z); long double complex clogl(long double complex z); Link with -lm. DescriptionThese functions calculate the complex natural logarithm of z, with a branch cut along the negative real axis. The logarithm clog() is the…
clog2, clog2f, clog2l – base-2 logarithm of a complex number Synopsis#include <complex.h> double complex clog2(double complex z); float complex clog2f(float complex z); long double complex clog2l(long double complex z); DescriptionThe call clog2(z) is equivalent to clog(z)/log(2). The other functions perform the same task for float and long double. Note that z close to zero will…
clog2, clog2f, clog2l – base-2 logarithm of a complex number Synopsis#include <complex.h> double complex clog2(double complex z); float complex clog2f(float complex z); long double complex clog2l(long double complex z); DescriptionThe call clog2(z) is equivalent to clog(z)/log(2). The other functions perform the same task for float and long double. Note that z close to zero will…
clog2, clog2f, clog2l – base-2 logarithm of a complex number Synopsis#include <complex.h> double complex clog2(double complex z); float complex clog2f(float complex z); long double complex clog2l(long double complex z); DescriptionThe call clog2(z) is equivalent to clog(z)/log(2). The other functions perform the same task for float and long double. Note that z close to zero will…
clog10, clog10f, clog10l – base-10 logarithm of a complex number Synopsis#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <complex.h> double complex clog10(double complex z); float complex clog10f(float complex z); long double complex clog10l(long double complex z); Link with -lm. DescriptionThe call clog10(z) is equivalent to: clog(z)/log(10) or equally: log10(cabs(c)) + I * carg(c) / log(10) The other functions perform the same task…
clog10, clog10f, clog10l – base-10 logarithm of a complex number Synopsis#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <complex.h> double complex clog10(double complex z); float complex clog10f(float complex z); long double complex clog10l(long double complex z); Link with -lm. DescriptionThe call clog10(z) is equivalent to: clog(z)/log(10) or equally: log10(cabs(c)) + I * carg(c) / log(10) The other functions perform the same task…
clog10, clog10f, clog10l – base-10 logarithm of a complex number Synopsis#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <complex.h> double complex clog10(double complex z); float complex clog10f(float complex z); long double complex clog10l(long double complex z); Link with -lm. DescriptionThe call clog10(z) is equivalent to: clog(z)/log(10) or equally: log10(cabs(c)) + I * carg(c) / log(10) The other functions perform the same task…
clog, clogf, clogl – natural logarithm of a complex number Synopsis#include <complex.h> double complex clog(double complex z); float complex clogf(float complex z); long double complex clogl(long double complex z); Link with -lm. DescriptionThese functions calculate the complex natural logarithm of z, with a branch cut along the negative real axis. The logarithm clog() is the…
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),…
clock_getres, clock_gettime, clock_settime – clock and time functions Synopsis#include <time.h> int clock_getres(clockid_t clk_id, struct timespec *res); int clock_gettime(clockid_t clk_id, struct timespec *tp); int clock_settime(clockid_t clk_id, const struct timespec *tp); Link with -lrt (only for glibc versions before 2.17). Feature Test Macro Requirements for glibc (see feature_test_macros(7)): clock_getres(), clock_gettime(), clock_settime(): _POSIX_C_SOURCE >= 199309LDescriptionThe function clock_getres() finds the resolution…
clock_getres, clock_gettime, clock_settime – clock and time functions Synopsis#include <time.h> int clock_getres(clockid_t clk_id, struct timespec *res); int clock_gettime(clockid_t clk_id, struct timespec *tp); int clock_settime(clockid_t clk_id, const struct timespec *tp); Link with -lrt (only for glibc versions before 2.17). Feature Test Macro Requirements for glibc (see feature_test_macros(7)): clock_getres(), clock_gettime(), clock_settime(): _POSIX_C_SOURCE >= 199309LDescriptionThe function clock_getres() finds the resolution…
clock_getres, clock_gettime, clock_settime – clock and time functions Synopsis#include <time.h> int clock_getres(clockid_t clk_id, struct timespec *res); int clock_gettime(clockid_t clk_id, struct timespec *tp); int clock_settime(clockid_t clk_id, const struct timespec *tp); Link with -lrt (only for glibc versions before 2.17). Feature Test Macro Requirements for glibc (see feature_test_macros(7)): clock_getres(), clock_gettime(), clock_settime(): _POSIX_C_SOURCE >= 199309LDescriptionThe function clock_getres() finds the resolution…
clock_getcpuclockid – obtain ID of a process CPU-time clock Synopsis#include <time.h> int clock_getcpuclockid(pid_t pid, clockid_t *clockid);Link with -lrt (only for glibc versions before 2.17). Feature Test Macro Requirements for glibc (see feature_test_macros(7)): clock_getcpuclockid(): _POSIX_C_SOURCE >= 200112LDescriptionThe clock_getcpuclockid() function obtains the ID of the CPU-time clock of the process whose ID is pid, and returns it in the…
clock – determine processor time Synopsis#include <time.h> clock_t clock(void);DescriptionThe clock() function returns an approximation of processor time used by the program. Return ValueThe value returned is the CPU time used so far as a clock_t; to get the number of seconds used, divide by CLOCKS_PER_SEC. If the processor time used is not available or its…
rpc – library routines for remote procedure calls Synopsis And DescriptionThese routines allow C programs to make procedure calls on other machines across the network. First, the client calls a procedure to send a data packet to the server. Upon receipt of the packet, the server calls a dispatch routine to perform the requested service,…