/*
- * "$Id: array.c 6649 2007-07-11 21:46:42Z mike $"
+ * "$Id: array.c 7616 2008-05-28 00:34:13Z mike $"
*
* Sorted array routines for the Common UNIX Printing System (CUPS).
*
* 'cupsArrayAdd()' - Add an element to the array.
*
* When adding an element to a sorted array, non-unique elements are
- * appended at the end of the run. For unsorted arrays, the element
- * is inserted at the end of the array.
+ * appended at the end of the run of identical elements. For unsorted arrays,
+ * the element is appended to the end of the array.
*
* @since CUPS 1.2@
*/
/*
* 'cupsArrayClear()' - Clear the array.
*
+ * This function is equivalent to removing all elements in the array.
+ * The caller is responsible for freeing the memory used by the
+ * elements themselves.
+ *
* @since CUPS 1.2@
*/
/*
* 'cupsArrayCurrent()' - Return the current element in the array.
*
+ * The current element is undefined until you call @link cupsArrayFind@,
+ * @link cupsArrayFirst@, or @link cupsArrayIndex@, or @link cupsArrayLast@.
+ *
* @since CUPS 1.2@
*/
/*
* 'cupsArrayDelete()' - Free all memory used by the array.
*
+ * The caller is responsible for freeing the memory used by the
+ * elements themselves.
+ *
* @since CUPS 1.2@
*/
* @since CUPS 1.2@
*/
-void * /* O - First element or @code NULL@ */
+void * /* O - First element or @code NULL@ if the array is empty */
cupsArrayFirst(cups_array_t *a) /* I - Array */
{
/*
/*
* 'cupsArrayGetIndex()' - Get the index of the current element.
*
+ * The current element is undefined until you call @link cupsArrayFind@,
+ * @link cupsArrayFirst@, or @link cupsArrayIndex@, or @link cupsArrayLast@.
+ *
* @since CUPS 1.3@
*/
-int /* O - Index of the current element */
+int /* O - Index of the current element, starting at 0 */
cupsArrayGetIndex(cups_array_t *a) /* I - Array */
{
if (!a)
* @since CUPS 1.3@
*/
-int /* O - Index of the last inserted element */
+int /* O - Index of the last inserted element, starting at 0 */
cupsArrayGetInsert(cups_array_t *a) /* I - Array */
{
if (!a)
* 'cupsArrayInsert()' - Insert an element in the array.
*
* When inserting an element in a sorted array, non-unique elements are
- * inserted at the beginning of the run. For unsorted arrays, the element
- * is inserted at the beginning of the array.
+ * inserted at the beginning of the run of identical elements. For unsorted
+ * arrays, the element is inserted at the beginning of the array.
*
* @since CUPS 1.2@
*/
* @since CUPS 1.2@
*/
-void * /* O - Last element or @code NULL@ */
+void * /* O - Last element or @code NULL@ if the array is empty */
cupsArrayLast(cups_array_t *a) /* I - Array */
{
/*
/*
* 'cupsArrayNew()' - Create a new array.
*
+ * The comparison function ("f") is used to create a sorted array. The function
+ * receives pointers to two elements and the user data pointer ("d") - the user
+ * data pointer argument can safely be omitted when not required so functions
+ * like @code strcmp@ can be used for sorted string arrays.
+ *
* @since CUPS 1.2@
*/
cups_array_t * /* O - Array */
-cupsArrayNew(cups_array_func_t f, /* I - Comparison function */
- void *d) /* I - User data */
+cupsArrayNew(cups_array_func_t f, /* I - Comparison function or @code NULL@ for an unsorted array */
+ void *d) /* I - User data pointer or @code NULL@ */
{
return (cupsArrayNew2(f, d, 0, 0));
}
/*
* 'cupsArrayNew2()' - Create a new array with hash.
*
+ * The comparison function ("f") is used to create a sorted array. The function
+ * receives pointers to two elements and the user data pointer ("d") - the user
+ * data pointer argument can safely be omitted when not required so functions
+ * like @code strcmp@ can be used for sorted string arrays.
+ *
+ * The hash function ("h") is used to implement cached lookups with the
+ * specified hash size ("hsize").
+ *
* @since CUPS 1.3@
*/
cups_array_t * /* O - Array */
-cupsArrayNew2(cups_array_func_t f, /* I - Comparison function */
- void *d, /* I - User data */
- cups_ahash_func_t h, /* I - Hash function*/
- int hsize) /* I - Hash size */
+cupsArrayNew2(cups_array_func_t f, /* I - Comparison function or @code NULL@ for an unsorted array */
+ void *d, /* I - User data or @code NULL@ */
+ cups_ahash_func_t h, /* I - Hash function or @code NULL@ for unhashed lookups */
+ int hsize) /* I - Hash size (>= 0) */
{
cups_array_t *a; /* Array */
/*
* 'cupsArrayNext()' - Get the next element in the array.
*
+ * This function is equivalent to "cupsArrayIndex(a, cupsArrayGetIndex(a) + 1)".
+ *
+ * The next element is undefined until you call @link cupsArrayFind@,
+ * @link cupsArrayFirst@, or @link cupsArrayIndex@, or @link cupsArrayLast@
+ * to set the current element.
+ *
* @since CUPS 1.2@
*/
/*
* 'cupsArrayPrev()' - Get the previous element in the array.
*
+ * This function is equivalent to "cupsArrayIndex(a, cupsArrayGetIndex(a) - 1)".
+ *
+ * The previous element is undefined until you call @link cupsArrayFind@,
+ * @link cupsArrayFirst@, or @link cupsArrayIndex@, or @link cupsArrayLast@
+ * to set the current element.
+ *
* @since CUPS 1.2@
*/
/*
* 'cupsArrayRemove()' - Remove an element from the array.
*
+ * If more than one element matches "e", only the first matching element is
+ * removed.
+ *
+ * The caller is responsible for freeing the memory used by the
+ * removed element.
+ *
* @since CUPS 1.2@
*/
/*
- * 'cupsArrayRestore()' - Reset the current element to the last cupsArraySave.
+ * 'cupsArrayRestore()' - Reset the current element to the last @link cupsArraySave@.
*
* @since CUPS 1.2@
*/
/*
- * 'cupsArraySave()' - Mark the current element for a later cupsArrayRestore.
+ * 'cupsArraySave()' - Mark the current element for a later @link cupsArrayRestore@.
+ *
+ * The current element is undefined until you call @link cupsArrayFind@,
+ * @link cupsArrayFirst@, or @link cupsArrayIndex@, or @link cupsArrayLast@
+ * to set the current element.
*
* The save/restore stack is guaranteed to be at least 32 elements deep.
*
}
#ifdef DEBUG
else
- printf("cups_array_add: append element at %d...\n", current);
+ DEBUG_printf(("cups_array_add: append element at %d...\n", current));
#endif /* DEBUG */
a->elements[current] = e;
#ifdef DEBUG
for (current = 0; current < a->num_elements; current ++)
- printf("cups_array_add: a->elements[%d]=%p\n", current, a->elements[current]);
+ DEBUG_printf(("cups_array_add: a->elements[%d]=%p\n", current,
+ a->elements[current]));
#endif /* DEBUG */
DEBUG_puts("cups_array_add: returning 1");
/*
- * End of "$Id: array.c 6649 2007-07-11 21:46:42Z mike $".
+ * End of "$Id: array.c 7616 2008-05-28 00:34:13Z mike $".
*/
projects / thirdparty / cups.git / blobdiff