Section 3: library functions
uuid_compare – compare whether two UUIDs are the same Synopsis #include <uuid.h> int uuid_compare(uuid_t uu1, uuid_t uu2) Description The uuid_compare function compares the two supplied uuid variables uu1 and uu2 to each other. Return Value Returns an integer less than, equal to, or greater than zero if uu1 is found, respectively, to be lexicographically less…
uuid_clear – reset value of UUID variable to the NULL value Synopsis #include <uuid.h> void uuid_clear(uuid_t uu); Description The uuid_clear function sets the value of the supplied uuid variable uu to the NULL value. Author Theodore Y. Ts’o Availability libuuid is part of the util-linux package since version 2.15.1 and is available from https://www.kernel.org/pub/linux/utils/util-linux/. See…
uuid – DCE compatible Universally Unique Identifier library Synopsis #include <uuid.h> Description The UUID library is used to generate unique identifiers for objects that may be accessible beyond the local system. This library generates UUIDs compatible with those created by the Open Software Foundation (OSF) Distributed Computing Environment (DCE) utility uuidgen. The UUIDs generated by…
utoupper – Converts a letter to upper case. Allegro game programming library. Synopsis #include <allegro.h> int utoupper(int c); Description This function returns `c’, converting it to upper case if it is lower case. See Also utolower(3), ugetc(3), ugetx(3), usetc(3), uwidth(3), ucwidth(3), uisok(3)
utolower – Converts a letter to lower case. Allegro game programming library. Synopsis #include <allegro.h> int utolower(int c); Description This function returns `c’, converting it to lower case if it is upper case. See Also utoupper(3), ugetc(3), ugetx(3), usetc(3), uwidth(3), ucwidth(3), uisok(3)
getutent, getutid, getutline, pututline, setutent, endutent, utmpname – access utmp file entries Synopsis #include <utmp.h> struct utmp *getutent(void); struct utmp *getutid(const struct utmp *ut); struct utmp *getutline(const struct utmp *ut); struct utmp *pututline(const struct utmp *ut); void setutent(void); void endutent(void); int utmpname(const char *file); Description New applications should use the POSIX.1-specified "utmpx" versions of these…
getutent, getutid, getutline, pututline, setutent, endutent, utmpname – access utmp file entries Synopsis #include <utmp.h> struct utmp *getutent(void); struct utmp *getutid(const struct utmp *ut); struct utmp *getutline(const struct utmp *ut); struct utmp *pututline(const struct utmp *ut); void setutent(void); void endutent(void); int utmpname(const char *file); Description New applications should use the POSIX.1-specified "utmpx" versions of these…
utils.h – C wrapper for DMLite utils. Synopsis #include ‘any.h’ #include ‘dmlite/common/config.h’ #include <limits.h> #include <stdint.h> Data Structures struct dmlite_url Handles URL. struct dmlite_aclentry Handles ACL entries. Macros #define ACL_ENTRIES_MAX 300 #define ACL_SIZE 13 #define CSUMTYPE_MAX 3 #define CSUMVALUE_MAX 33 #define GUID_MAX 36 #define HOST_NAME_MAX _POSIX_HOST_NAME_MAX #define QUERY_MAX 1024 #define SCHEME_MAX 7 #define URL_MAX 8192…
Utilities – Iterators are meant to build a sequence on the fly from one or more other sequences, without having to allocate place for storing it. A couple of examples: suppose we have a function which calculates the average of a sequence, and that for genericity we have implemented it as a template function which…
uszprintf – Writes formatted data into a buffer, specifying size. Allegro game programming library. Synopsis #include <allegro.h> int uszprintf(char *buf, int size, const char *format, …); Description This function writes formatted data into the output buffer, whose length in bytes is specified by `size’ and which is guaranteed to be NULL terminated. Example: char buffer[10];…
ustrzncpy – Copies a string into another one, specifying size. Allegro game programming library. Synopsis #include <allegro.h> char *ustrzncpy(char *dest, int size, const char *src, int n); Description This function is like ustrzcpy() except that no more than `n’ characters from `src’ are copied into `dest’. If `src’ is shorter than `n’ characters, null characters…
ustrzncat – Concatenates a string to another one, specifying size. Allegro game programming library. Synopsis #include <allegro.h> char *ustrzncat(char *dest, int size, const char *src, int n); Description This function is like ustrzcat() except that no more than `n’ characters from `src’ are appended to the end of `dest’. If the terminating null character in…
ustrzcpy – Copies a string into another one, specifying size. Allegro game programming library. Synopsis #include <allegro.h> char *ustrzcpy(char *dest, int size, const char *src); Description This function copies `src’ (including the terminating null character) into `dest’, whose length in bytes is specified by `size’ and which is guaranteed to be null-terminated even if `src’…
ustrzcat – Concatenates a string to another one, specifying size. Allegro game programming library. Synopsis #include <allegro.h> char *ustrzcat(char *dest, int size, const char *src); Description This function concatenates `src’ to the end of `dest’, whose length in bytes is specified by `size’ and which is guaranteed to be null-terminated even when `src’ is bigger…
ustrupr – Replaces all letters with upper case. Allegro game programming library. Synopsis #include <allegro.h> char *ustrupr(char *s); Description This function replaces all lower case letters in `s’ with upper case letters. Example: char buffer[] = "lower case string"; allegro_message(ustrupr(buffer)); Return Value The return value is the value of `s’. See Also uconvert(3), utolower(3), ustrlwr(3)
ustrtol – Converts a string into an integer. Allegro game programming library. Synopsis #include <allegro.h> long ustrtol(const char *s, char **endp, int base); Description This function converts the initial part of `s’ to a signed integer, setting `*endp’ to point to the first unused character, if `endp’ is not a NULL pointer. The `base’ argument…
ustrtok_r – Reentrant function to retrieve tokens from a string. Allegro game programming library. Synopsis #include <allegro.h> char *ustrtok_r(char *s, const char *set, char **last); Description Reentrant version of ustrtok. The `last’ parameter is used to keep track of where the parsing is up to and must be a pointer to a char * variable…
ustrtok – Retrieves tokens from a string. Allegro game programming library. Synopsis #include <allegro.h> char *ustrtok(char *s, const char *set); Description This function retrieves tokens from `s’ which are delimited by characters from `set’. To initiate the search, pass the string to be searched as `s’. For the remaining tokens, pass NULL instead. Warning: Since…
ustrtod – Converts a string into a floating point number. Allegro game programming library. Synopsis #include <allegro.h> double ustrtod(const char *s, char **endp); Description This function converts as many characters of `s’ that look like a floating point number into one, and sets `*endp’ to point to the first unused character, if `endp’ is not…
ustrstr – Finds the first occurrence of a string in another one. Allegro game programming library. Synopsis #include <allegro.h> char *ustrstr(const char *s1, const char *s2); Description This function finds the first occurrence of string `s2′ in string `s1′. Example: char *p = ustrstr("hello world", "world"); Return Value Returns a pointer within `s1′, or NULL…