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array(3)              DragonFly Library Functions Manual              array(3)

NAME
       array - The array library interface

SYNTAX
       #include <array.h>

DESCRIPTION
       An allocated array variable keeps track of

       o      a (nonzero) pointer to a dynamically allocated region of memory;

       o      the number of bytes allocated (always positive); and

       o      the number of bytes initialized (between 0 and the number of
              bytes allocated).

       There are two other possibilities for the state of an array variable:
       unallocated and failed.  In both cases, there is no dynamically
       allocated region of memory.

       A new array variable is normally created as a static variable:

         #include "array.h"

         static array x;

       At this point it is unallocated.  The array library provides various
       allocation and inspection functions.

       A new array variable can also be created dynamically. It must be
       initialized to all-0, meaning unallocated, before it is given to any of
       the array functions. It must be returned to the unallocated (or failed)
       state, for example with array_reset, before it is destroyed. These
       rules prevent all memory leaks.

Expansion and inspection
         array x;

         t* p1 = array_allocate(&x,sizeof(t),pos);

         t* p2 = array_get(&x,sizeof(t),pos);

         t* p3 = array_start(&x);

         int64 len = array_length(&x,sizeof(t));

         int64 bytes = array_bytes(&x);

Truncation and deallocation
         array x;

         array_truncate(&x,sizeof(t),len);

         array_trunc(&x);

         array_reset(&x);

         array_fail(&x);

Comparison
         array x;
         array y;

         if (array_equal(&x,&y))
           /* arrays are equal... */

Concatenation
         array x;
         array y;

         array_cat(&x,&y);

         array_catb(&x,"fnord",5);

         array_cats(&x,"fnord");

         array_cats0(&x,"fnord"); /* also append the \0 */

         array_cat0(&x); /* append \0 */

         array_cate(&x,"fnord",1,4); /* append "nor" */

ORIGINAL API DEFINITION
       http://cr.yp.to/lib/array.html

SEE ALSO
       array_get(3), array_start(3), array_fail(3)

                                                                      array(3)