517 lines
18 KiB
Plaintext
517 lines
18 KiB
Plaintext
@c Automatically generated from *.c and others (the comments before
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@c each entry tell you which file and where in that file). DO NOT EDIT!
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@c Edit the *.c files, configure with --enable-maintainer-mode,
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@c and let gather-docs build you a new copy.
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@c alloca.c:26
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@deftypefn Replacement void* alloca (size_t)
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This function allocates memory which will be automatically reclaimed
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after the procedure exits. The @libib{} implementation does not free
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the memory immediately but will do so eventually during subsequent
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calls to this function. Memory is allocated using @code{xmalloc} under
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normal circumstances.
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The header file @file{alloca-conf.h} can be used in conjunction with the
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GNU Autoconf test @code{AC_FUNC_ALLOCA} to test for and properly make
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available this function. The @code{AC_FUNC_ALLOCA} test requires that
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client code use a block of preprocessor code to be safe (see the Autoconf
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manual for more); this header incorporates that logic and more, including
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the possibility of a GCC builtin function.
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@end deftypefn
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@c atexit.c:6
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@deftypefn Supplemental int atexit (void (*@var{f})())
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Causes function @var{f} to be called at exit. Returns 0.
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@end deftypefn
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@c basename.c:6
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@deftypefn Supplemental char* basename (const char *@var{name})
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Returns a pointer to the last component of pathname @var{name}.
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Behavior is undefined if the pathname ends in a directory separator.
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@end deftypefn
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@c bcmp.c:6
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@deftypefn Supplemental int bcmp (char *@var{x}, char *@var{y}, int @var{count})
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Compares the first @var{count} bytes of two areas of memory. Returns
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zero if they are the same, non-zero otherwise. Returns zero if
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@var{count} is zero. A non-zero result only indicates a difference,
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it does not indicate any sorting order (say, by having a positive
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result mean @var{x} sorts before @var{y}).
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@end deftypefn
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@c bcopy.c:3
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@deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length})
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Copies @var{length} bytes from memory region @var{in} to region
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@var{out}. The use of @code{bcopy} is deprecated in new programs.
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@end deftypefn
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@c bsearch.c:33
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@deftypefn Supplemental void* bsearch (const void *@var{key}, const void *@var{base}, size_t @var{nmemb}, size_t @var{size}, int (*@var{compar})(const void *, const void *))
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Performs a search over an array of @var{nmemb} elements pointed to by
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@var{base} for a member that matches the object pointed to by @var{key}.
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The size of each member is specified by @var{size}. The array contents
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should be sorted in ascending order according to the @var{compar}
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comparison function. This routine should take two arguments pointing to
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the @var{key} and to an array member, in that order, and should return an
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integer less than, equal to, or greater than zero if the @var{key} object
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is respectively less than, matching, or greater than the array member.
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@end deftypefn
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@c bzero.c:6
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@deftypefn Supplemental void bzero (char *@var{mem}, int @var{count})
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Zeros @var{count} bytes starting at @var{mem}. Use of this function
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is deprecated in favor of @code{memset}.
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@end deftypefn
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@c calloc.c:6
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@deftypefn Supplemental void* calloc (size_t @var{nelem}, size_t @var{elsize})
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Uses @code{malloc} to allocate storage for @var{nelem} objects of
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@var{elsize} bytes each, then zeros the memory.
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@end deftypefn
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@c clock.c:27
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@deftypefn Supplemental long clock ()
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Returns an approximation of the CPU time used by the process as a
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@code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the
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number of seconds used.
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@end deftypefn
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@c strerror.c:566
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@deftypefn Replacement int errno_max (void)
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Returns the maximum @code{errno} value for which a corresponding
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symbolic name or message is available. Note that in the case where we
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use the @code{sys_errlist} supplied by the system, it is possible for
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there to be more symbolic names than messages, or vice versa. In
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fact, the manual page for @code{perror(3C)} explicitly warns that one
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should check the size of the table (@code{sys_nerr}) before indexing
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it, since new error codes may be added to the system before they are
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added to the table. Thus @code{sys_nerr} might be smaller than value
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implied by the largest @code{errno} value defined in @file{errno.h}.
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We return the maximum value that can be used to obtain a meaningful
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symbolic name or message.
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@end deftypefn
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@c getcwd.c:6
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@deftypefn Supplemental char* getcwd (char *@var{pathname}, @var{len})
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Copy the absolute pathname for the current working directory into
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@var{pathname}, which is assumed to point to a buffer of at least
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@var{len} bytes, and return a pointer to the buffer. If the current
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directory's path doesn't fit in @var{len} characters, the result is
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NULL and @var{errno} is set. If @var{pathname} is a null pointer,
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@code{getcwd} will obtain @var{len} bytes of space using
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@code{malloc}.
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@end deftypefn
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@c getpagesize.c:5
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@deftypefn Supplemental int getpagesize ()
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Returns the number of bytes in a page of memory. This is the
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granularity of many of the system memory management routines. No
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guarantee is made as to whether or not it is the same as the basic
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memory management hardware page size.
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@end deftypefn
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@c getpwd.c:5
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@deftypefn Supplemental char* getpwd ()
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Returns the current working directory. This implementation caches the
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result on the assumption that the process will not call @code{chdir}
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between calls to @code{getpwd}.
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@end deftypefn
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@c index.c:5
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@deftypefn Supplemental char* index (char *@var{s}, int @var{c})
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Returns a pointer to the first occurrence of the character @var{c} in
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the string @var{s}, or NULL if not found. The use of @code{index} is
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deprecated in new programs in favor of @code{strchr}.
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@end deftypefn
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@c memchr.c:3
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@deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n})
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This function searches memory starting at @code{*}@var{src} for the
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character @var{c}. The search only ends with the first occurrence of
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@var{c}, or after @var{length} characters; in particular, a null
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character does not terminate the search. If the character @var{c} is
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found within @var{length} characters of @code{*}@var{src}, a pointer
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to the character is returned. If @var{c} is not found, then NULL is
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returned.
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@end deftypefn
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@c memcmp.c:6
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@deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count})
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Compares the first @var{count} bytes of two areas of memory. Returns
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zero if they are the same, a value less than zero if @var{x} is
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lexically less than @var{y}, or a value greater than zero if @var{x}
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is lexically greater than @var{y}. Note that lexical order is determined
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as if comparing unsigned char arrays.
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@end deftypefn
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@c memcpy.c:6
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@deftypefn Supplemental void* memcpy (void *@var{out}, const void *@var{in}, size_t @var{length})
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Copies @var{length} bytes from memory region @var{in} to region
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@var{out}. Returns a pointer to @var{out}.
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@end deftypefn
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@c memmove.c:6
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@deftypefn Supplemental void* memmove (void *@var{from}, const void *@var{to}, size_t @var{count})
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Copies @var{count} bytes from memory area @var{from} to memory area
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@var{to}, returning a pointer to @var{to}.
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@end deftypefn
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@c memset.c:6
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@deftypefn Supplemental void* memset (void *@var{s}, int @var{c}, size_t @var{count})
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Sets the first @var{count} bytes of @var{s} to the constant byte
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@var{c}, returning a pointer to @var{s}.
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@end deftypefn
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@c putenv.c:21
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@deftypefn Supplemental int putenv (const char *@var{string})
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Uses @code{setenv} or @code{unsetenv} to put @var{string} into
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the environment or remove it. If @var{string} is of the form
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@samp{name=value} the string is added; if no `=' is present the
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name is unset/removed.
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@end deftypefn
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@c rename.c:6
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@deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new})
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Renames a file from @var{old} to @var{new}. If @var{new} already
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exists, it is removed.
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@end deftypefn
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@c rindex.c:5
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@deftypefn Supplemental char* rindex (const char *@var{s}, int @var{c})
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Returns a pointer to the last occurrence of the character @var{c} in
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the string @var{s}, or NULL if not found. The use of @code{rindex} is
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deprecated in new programs in favor of @code{strrchr}.
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@end deftypefn
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@c setenv.c:22
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@deftypefn Supplemental int setenv (const char *@var{name}, const char *@var{value}, int @var{overwrite})
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@deftypefnx Supplemental void unsetenv (const char *@var{name})
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@code{setenv} adds @var{name} to the environment with value
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@var{value}. If the name was already present in the environment,
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the new value will be stored only if @var{overwrite} is non-zero.
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The companion @code{unsetenv} function removes @var{name} from the
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environment. This implementation is not safe for multithreaded code.
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@end deftypefn
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@c sigsetmask.c:8
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@deftypefn Supplemental int sigsetmask (int @var{set})
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Sets the signal mask to the one provided in @var{set} and returns
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the old mask (which, for libiberty's implementation, will always
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be the value @code{1}).
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@end deftypefn
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@c strcasecmp.c:15
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@deftypefn Supplemental int strcasecmp (const char *@var{s1}, const char *@var{s2})
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A case-insensitive @code{strcmp}.
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@end deftypefn
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@c strchr.c:6
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@deftypefn Supplemental char* strchr (const char *@var{s}, int @var{c})
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Returns a pointer to the first occurrence of the character @var{c} in
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the string @var{s}, or NULL if not found. If @var{c} is itself the
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null character, the results are undefined.
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@end deftypefn
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@c strdup.c:3
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@deftypefn Supplemental char* strdup (const char *@var{s})
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Returns a pointer to a copy of @var{s} in memory obtained from
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@code{malloc}, or NULL if insufficient memory was available.
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@end deftypefn
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@c strerror.c:670
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@deftypefn Replacement const char* strerrno (int @var{errnum})
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Given an error number returned from a system call (typically returned
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in @code{errno}), returns a pointer to a string containing the
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symbolic name of that error number, as found in @file{errno.h}.
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If the supplied error number is within the valid range of indices for
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symbolic names, but no name is available for the particular error
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number, then returns the string @samp{"Error @var{num}"}, where @var{num}
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is the error number.
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If the supplied error number is not within the range of valid
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indices, then returns NULL.
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The contents of the location pointed to are only guaranteed to be
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valid until the next call to @code{strerrno}.
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@end deftypefn
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@c strerror.c:602
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@deftypefn Replacement char* strerror (int @var{errnoval})
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Maps an @code{errno} number to an error message string, the contents
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of which are implementation defined. On systems which have the
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external variables @code{sys_nerr} and @code{sys_errlist}, these
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strings will be the same as the ones used by @code{perror}.
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If the supplied error number is within the valid range of indices for
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the @code{sys_errlist}, but no message is available for the particular
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error number, then returns the string @samp{"Error @var{num}"}, where
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@var{num} is the error number.
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If the supplied error number is not a valid index into
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@code{sys_errlist}, returns NULL.
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The returned string is only guaranteed to be valid only until the
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next call to @code{strerror}.
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@end deftypefn
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@c strncasecmp.c:15
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@deftypefn Supplemental int strncasecmp (const char *@var{s1}, const char *@var{s2})
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A case-insensitive @code{strncmp}.
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@end deftypefn
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@c strncmp.c:6
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@deftypefn Supplemental int strncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n})
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Compares the first @var{n} bytes of two strings, returning a value as
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@code{strcmp}.
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@end deftypefn
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@c strrchr.c:6
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@deftypefn Supplemental char* strrchr (const char *@var{s}, int @var{c})
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Returns a pointer to the last occurrence of the character @var{c} in
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the string @var{s}, or NULL if not found. If @var{c} is itself the
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null character, the results are undefined.
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@end deftypefn
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@c strstr.c:6
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@deftypefn Supplemental char* strstr (const char *@var{string}, const char *@var{sub})
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This function searches for the substring @var{sub} in the string
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@var{string}, not including the terminating null characters. A pointer
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to the first occurrence of @var{sub} is returned, or NULL if the
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substring is absent. If @var{sub} points to a string with zero
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length, the function returns @var{string}.
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@end deftypefn
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@c strtod.c:27
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@deftypefn Supplemental double strtod (const char *@var{string}, char **@var{endptr})
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This ANSI C function converts the initial portion of @var{string} to a
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@code{double}. If @var{endptr} is not NULL, a pointer to the
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character after the last character used in the conversion is stored in
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the location referenced by @var{endptr}. If no conversion is
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performed, zero is returned and the value of @var{string} is stored in
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the location referenced by @var{endptr}.
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@end deftypefn
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@c strerror.c:730
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@deftypefn Replacement int strtoerrno (const char *@var{name})
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Given the symbolic name of a error number (e.g., @code{EACCESS}), map it
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to an errno value. If no translation is found, returns 0.
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@end deftypefn
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@c strtol.c:33
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@deftypefn Supplemental {long int} strtol (const char *@var{string}, char **@var{endptr}, int @var{base})
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The @code{strtol} function converts the string in @var{string} to a
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long integer value according to the given @var{base}, which must be
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between 2 and 36 inclusive, or be the special value 0. If @var{base}
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is 0, @code{strtol} will look for the prefixes @code{0} and @code{0x}
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to indicate bases 8 and 16, respectively, else default to base 10.
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When the base is 16 (either explicitly or implicitly), a prefix of
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@code{0x} is allowed. The handling of @var{endptr} is as that of
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@code{strtod} above.
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@end deftypefn
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@c tmpnam.c:3
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@deftypefn Supplemental char* tmpnam (char *@var{s})
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This function attempts to create a name for a temporary file, which
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will be a valid file name yet not exist when @code{tmpnam} checks for
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it. @var{s} must point to a buffer of at least @code{L_tmpnam} bytes,
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or be NULL. Use of this function creates a security risk, and it must
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not be used in new projects. Use @code{mkstemp} instead.
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@end deftypefn
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@c vfork.c:6
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@deftypefn Supplemental int vfork ()
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Emulates @code{vfork} by calling @code{fork} and returning its value.
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@end deftypefn
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@c vprintf.c:3
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@deftypefn Supplemental int vprintf (const char *@var{format}, va_list @var{ap})
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@deftypefnx Supplemental int vfprintf (FILE *@var{stream}, const char *@var{format}, va_list @var{ap})
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@deftypefnx Supplemental int vsprintf (char *@var{str}, const char *@var{format}, va_list @var{ap})
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These functions are the same as @code{printf}, @code{fprintf}, and
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@code{sprintf}, respectively, except that they are called with a
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@code{va_list} instead of a variable number of arguments. Note that
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they do not call @code{va_end}; this is the application's
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responsibility. In @libib{} they are implemented in terms of the
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nonstandard but common function @code{_doprnt}.
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@end deftypefn
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@c waitpid.c:3
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@deftypefn Supplemental int waitpid (int @var{pid}, int *@var{status}, int)
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This is a wrapper around the @code{wait} function. Any ``special''
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values of @var{pid} depend on your implementation of @code{wait}, as
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does the return value. The third argument is unused in @libib{}.
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@end deftypefn
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@c xatexit.c:11
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@deftypefun int xatexit (void (*@var{fn}) (void))
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Behaves as the standard @code{atexit} function, but with no limit on
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the number of registered functions. Returns 0 on success, or -1 on
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failure. If you use @code{xatexit} to register functions, you must use
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@code{xexit} to terminate your program.
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@end deftypefun
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@c xmalloc.c:38
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@deftypefn Replacement void* xcalloc (size_t, size_t)
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Allocate memory without fail, and set it to zero. This routine functions
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like @code{calloc}, but will behave the same as @code{xmalloc} if memory
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cannot be found.
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@end deftypefn
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@c xexit.c:22
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@deftypefn Replacement void xexit (int @var{code})
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Terminates the program. If any functions have been registered with
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the @code{xatexit} replacement function, they will be called first.
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Termination is handled via the system's normal @code{exit} call.
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@end deftypefn
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@c xmalloc.c:22
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@deftypefn Replacement void* xmalloc (size_t)
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Allocate memory without fail. If @code{malloc} fails, this will print
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a message to @code{stderr} (using the name set by
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@code{xmalloc_set_program_name},
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if any) and then call @code{xexit}. Note that it is therefore safe for
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a program to contain @code{#define malloc xmalloc} in its source.
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@end deftypefn
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@c xmalloc.c:53
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@deftypefn Replacement void xmalloc_failed (size_t)
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This function is not meant to be called by client code, and is listed
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here for completeness only. If any of the allocation routines fail, this
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function will be called to print an error message and terminate execution.
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@end deftypefn
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@c xmalloc.c:46
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@deftypefn Replacement void xmalloc_set_program_name (const char *@var{name})
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You can use this to set the name of the program used by
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@code{xmalloc_failed} when printing a failure message.
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@end deftypefn
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@c xmemdup.c:7
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@deftypefn Replacement void* xmemdup (void *@var{input}, size_t @var{copy_size}, size_t @var{alloc_size})
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Duplicates a region of memory without fail. First, @var{alloc_size} bytes
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|
are allocated, then @var{copy_size} bytes from @var{input} are copied into
|
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it, and the new memory is returned. If fewer bytes are copied than were
|
|
allocated, the remaining memory is zeroed.
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@end deftypefn
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@c xmalloc.c:32
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@deftypefn Replacement void* xrealloc (void*, size_t)
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|
Reallocate memory without fail. This routine functions like @code{realloc},
|
|
but will behave the same as @code{xmalloc} if memory cannot be found.
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|
@end deftypefn
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@c xstrdup.c:7
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|
@deftypefn Replacement char* xstrdup (const char *@var{s})
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|
Duplicates a character string without fail, using @code{xmalloc} to
|
|
obtain memory.
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|
@end deftypefn
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|
@c xstrerror.c:7
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|
@deftypefn Replacement char* xstrerror (int @var{errnum})
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|
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|
Behaves exactly like the standard @code{strerror} function, but
|
|
will never return a NULL pointer.
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|
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|
@end deftypefn
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|
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