Linux Manuals

QuantLib::RelinkableHandle – Relinkable handle to an observable. Synopsis#include <ql/handle.hpp> Inherits Handle< T >. Public Member FunctionsRelinkableHandle (const boost::shared_ptr< T > &h=boost::shared_ptr< T >(), bool registerAsObserver=true) void linkTo (const boost::shared_ptr< T > &, bool registerAsObserver=true) Detailed Descriptiontemplate<class T> class QuantLib::RelinkableHandle< T >Relinkable handle to an observable. An instance of this class can be relinked so that…

line – Draws a line onto the bitmap. Allegro game programming library. Synopsis#include <allegro.h> void line(BITMAP *bmp, int x1, int y1, int x2, int y2, int color); DescriptionDraws a line onto the bitmap, from point (x1, y1) to (x2, y2). See Alsofastline(3), hline(3), vline(3), do_line(3), drawing_mode(3), makecol(3)

Numeric limits – Defines#define QL_MIN_INTEGER ((std::numeric_limits<QL_INTEGER>::min)()) #define QL_MAX_INTEGER ((std::numeric_limits<QL_INTEGER>::max)()) #define QL_MIN_REAL -((std::numeric_limits<QL_REAL>::max)()) #define QL_MIN_POSITIVE_REAL ((std::numeric_limits<QL_REAL>::min)()) #define QL_MAX_REAL ((std::numeric_limits<QL_REAL>::max)()) #define QL_EPSILON ((std::numeric_limits<QL_REAL>::epsilon)()) #define QL_NULL_INTEGER ((std::numeric_limits<int>::max)()) #define QL_NULL_REAL ((std::numeric_limits<float>::max)()) Detailed DescriptionSome compilers do not give an implementation of <limits> yet. For the code to be portable these macros should be used instead of the corresponding method of…

libxslt – library used to do XSL transformations on XML documents DescriptionThe libxslt library is used to do XSL transformations on XML documents that have been loaded into memory with functions from libxml. Files/usr/lib/libxslt_1.0.0/libxslt.a static library /usr/lib/libxslt_1.0.0/libxslt.so sharable library /usr/package/libxslt_1.0.0/bin/xsltproc binary application to do XSL transformations on the command lineAuthorsDaniel Veillard (daniel [at] veillard.com). If…

libxml – library used to parse XML files DescriptionThe libxml library is used to parse XML files. Its internal document representation is as close as possible to the DOM (Document Object Model) interface, an API for accessing XML or HTML structured documents. The libxml library also has a SAX-like interface, which is designed to be…

libunbound, unbound.h, ub_ctx, ub_result, ub_callback_t, ub_ctx_create, ub_ctx_delete, ub_ctx_set_option, ub_ctx_get_option, ub_ctx_config, ub_ctx_set_fwd, ub_ctx_resolvconf, ub_ctx_hosts, ub_ctx_add_ta, ub_ctx_add_ta_file, ub_ctx_trustedkeys, ub_ctx_debugout, ub_ctx_debuglevel, ub_ctx_async, ub_poll, ub_wait, ub_fd, ub_process, ub_resolve, ub_resolve_async, ub_cancel, ub_resolve_free, ub_strerror, ub_ctx_print_local_zones, ub_ctx_zone_add, ub_ctx_zone_remove, ub_ctx_data_add, ub_ctx_data_remove – Unbound DNS validating resolver 1.4.20 functions. Synopsis#include <unbound.h> struct ub_ctx * ub_ctx_create(void); void ub_ctx_delete(struct ub_ctx* ctx); int ub_ctx_set_option(struct ub_ctx* ctx, char*…

pm_tmpfile_fd() – create a temporary unnamed file Synopsis#include <netpbm/pm.h> FILE * pm_tmpfile_fd(void);ExampleThis simple example creates a temporary file, writes ‘hello world’ to it, then reads back and prints those contents. #include <netpbm/pm.h> int fd; fd = pm_tmpfile(); write(fd, ‘hello world\n’, 17); lseek(fd, 0, SEEK_SET); read(fd, buffer, sizeof(buffer)); fprintf(STDOUT, ‘temp file contains ‘%s’\n’, buffer); close(fd);DescriptionThis library…

pm_tmpfile() – create a temporary unnamed file Synopsis#include <netpbm/pm.h> FILE * pm_tmpfile(void);ExampleThis simple example creates a temporary file, writes ‘hello world’ to it, then reads back and prints those contents. #include <netpbm/pm.h> FILE * myfileP; myfile = pm_tmpfile(); fprintf(myfile, ‘hello world\n’); fseek(myfileP, 0, SEEK_SET); fread(buffer, sizeof(buffer), 1, myfileP); fprintf(STDOUT, ‘temp file contains ‘%s’\n’, buffer); fclose(myfileP);DescriptionThis…

libtasn1_strerror – Returns a string with a description of an error Synopsis#include <libtasn1.h> const char * libtasn1_strerror(asn1_retCode error); Argumentsasn1_retCode error is an error returned by a libtasn1 function.DescriptionThis function is similar to strerror. The only difference is that it accepts an error (number) returned by a libtasn1 function. ReturnsPointer to static zero-terminated string describing error…

libtasn1_perror – prints a string to stderr with a description of an error Synopsis#include <libtasn1.h> void libtasn1_perror(asn1_retCode error); Argumentsasn1_retCode error is an error returned by a libtasn1 function.DescriptionThis function is like perror(). The only difference is that it accepts an error returned by a libtasn1 function. DeprecatedUse asn1_perror() instead. CopyrightCopyright © 2006, 2007, 2008, 2009…

libtalloc_tutorial – The Tutorial IntroductionTalloc is a hierarchical, reference counted memory pool system with destructors. It is built atop the C standard library and it defines a set of utility functions that altogether simplifies allocation and deallocation of data, especially for complex structures that contain many dynamically allocated elements such as strings and arrays. The…

libtalloc_threads – Chapter 8: Using threads with talloc and thread safetyThe talloc library is not internally thread-safe, in that accesses to variables on a talloc context are not controlled by mutexes or other thread-safe primitives. However, so long as talloc_disable_null_tracking() is called from the main thread to disable global variable access within talloc, then each…

libtalloc_stealing – Chapter 2: Stealing a context Stealing a contextTalloc has the ability to change the parent of a talloc context to another one. This operation is commonly referred to as stealing and it is one of the most important actions performed with talloc contexts. Stealing a context is necessary if we want the pointer…

libtalloc_pools – Chapter 5: Memory pools Memory poolsAllocation of a new memory is an expensive operation and large programs can contain thousands of calls of malloc() for a single computation, where every call allocates only a very small amount of the memory. This can result in an undesirable slowdown of the application. We can avoid…

libtalloc_dts – Chapter 3: Dynamic type system Dynamic type systemGeneric programming in the C language is very difficult. There is no inheritance nor templates known from object oriented languages. There is no dynamic type system. Therefore, generic programming in this language is usually done by type-casting a variable to void* and transferring it through a…

libtalloc_destructors – Chapter 4: Using destructors Using destructorsDestructors are well known methods in the world of object oriented programming. A destructor is a method of an object that is automatically run when the object is destroyed. It is usually used to return resources taken by the object back to the system (e.g. closing file descriptors,…

libtalloc_debugging – Chapter 6: Debugging Although talloc makes memory management significantly easier than the C standard library, developers are still only humans and can make mistakes. Therefore, it can be handy to know some tools for the inspection of talloc memory usage. Talloc log and abortWe have already encountered the abort function in section Dynamic…

libtalloc_context – Chapter 1: Talloc context Talloc contextThe talloc context is the most important part of this library and is responsible for every single feature of this memory allocator. It is a logical unit which represents a memory space managed by talloc. From the programmer’s point of view, the talloc context is completely equivalent to…

libtalloc_bestpractices – Chapter 7: Best practises The following sections contain several best practices and good manners that were found by the Samba and SSSD developers over the years. These will help you to write code which is better, easier to debug and with as few (hopefully none) memory leaks as possible. Keep the context hierarchy…

pm_system – run a Netpbm program with program input and output Synopsis #include <netpbm/pm_system.h> pm_system(void stdinFeeder(int, void *), void * const feederParm, void stdoutAccepter(int, void *), void * const accepterParm, const char * const shellCommand); pm_system_lp(const char * const progName, void stdinFeeder(int, void *), void * const feederParm, void stdoutAccepter(int, void *), void * const…