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+.\" ========================================================================
+.\"
+.IX Title "LIBRRD 1"
+.TH LIBRRD 1 "2009-04-20" "1.3.99909060808" "rrdtool"
+.SH "NAME"
+librrd \- RRD library functions
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fBlibrrd\fR contains most of the functionality in \fBRRDTool\fR. The command
+line utilities and language bindings are often just wrappers around the
+code contained in \fBlibrrd\fR.
+.PP
+This manual page documents the \fBlibrrd\fR \s-1API\s0.
+.PP
+\&\fB\s-1NOTE:\s0\fR This document is a work in progress, and should be considered
+incomplete as long as this warning persists. For more information about
+the \fBlibrrd\fR functions, always consult the source code.
+.SH "UTILITY FUNCTIONS"
+.IX Header "UTILITY FUNCTIONS"
+.IP "\fB\f(BIrrd_random()\fB\fR" 4
+.IX Item "rrd_random()"
+Generates random numbers just like \fIrandom()\fR. This further ensures that
+the random number generator is seeded exactly once per process.
+.IP "\fBrrd_add_ptr(void ***dest, size_t *dest_size, void *src)\fR" 4
+.IX Item "rrd_add_ptr(void ***dest, size_t *dest_size, void *src)"
+Dynamically resize the array pointed to by \f(CW\*(C`dest\*(C'\fR. \f(CW\*(C`dest_size\*(C'\fR is a
+pointer to the current size of \f(CW\*(C`dest\*(C'\fR. Upon successful \fIrealloc()\fR, the
+\&\f(CW\*(C`dest_size\*(C'\fR is incremented by 1 and the \f(CW\*(C`src\*(C'\fR pointer is stored at the
+end of the new \f(CW\*(C`dest\*(C'\fR. Returns 1 on success, 0 on failure.
+.Sp
+.Vb 5
+\& type **arr = NULL;
+\& type *elem = "whatever";
+\& size_t arr_size = 0;
+\& if (!rrd_add_ptr(&arr, &arr_size, elem))
+\& handle_failure();
+.Ve
+.IP "\fBrrd_add_strdup(char ***dest, size_t *dest_size, char *src)\fR" 4
+.IX Item "rrd_add_strdup(char ***dest, size_t *dest_size, char *src)"
+Like \f(CW\*(C`rrd_add_ptr\*(C'\fR, except adds a \f(CW\*(C`strdup\*(C'\fR of the source string.
+.Sp
+.Vb 5
+\& char **arr = NULL;
+\& size_t arr_size = NULL;
+\& char *str = "example text";
+\& if (!rrd_add_strdup(&arr, &arr_size, str))
+\& handle_failure();
+.Ve
+.IP "\fBrrd_free_ptrs(void ***src, size_t *cnt)\fR" 4
+.IX Item "rrd_free_ptrs(void ***src, size_t *cnt)"
+Free an array of pointers allocated by \f(CW\*(C`rrd_add_ptr\*(C'\fR or
+\&\f(CW\*(C`rrd_add_strdup\*(C'\fR. Also frees the array pointer itself. On return, the
+source pointer will be \s-1NULL\s0 and the count will be zero.
+.Sp
+.Vb 3
+\& /* created as above */
+\& rrd_free_ptrs(&arr, &arr_size);
+\& /* here, arr == NULL && arr_size == 0 */
+.Ve