ucx: src/ucx/array.h@28a8ccc442b0 (annotated)

src/ucx/array.h@28a8ccc442b0 (annotated)

src/ucx/array.h

Thu, 07 Nov 2019 10:10:36 +0100

author: Mike Becker <universe@uap-core.de>
date: Thu, 07 Nov 2019 10:10:36 +0100
changeset 369: 28a8ccc442b0
parent 365: 72da0e4cbf4a
permissions: -rw-r--r--

removes some bugs by redesigning the array API

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2019 Mike Becker, Olaf Wintermann All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /**
  * Dynamically allocated array implementation.
  *
  * @file   array.h
  * @author Mike Becker
  * @author Olaf Wintermann
  */
 #ifndef UCX_ARRAY_H
 #define	UCX_ARRAY_H
 #include "ucx.h"
 #include "allocator.h"
 #ifdef	__cplusplus
 extern "C" {
 #endif
 /**
  * UCX array type.
  */
 typedef struct {
     /**
      * The current capacity of the array.
      */
     size_t capacity;
     /**
      * The actual number of elements in the array.
      */
     size_t size;
     /**
      * The size of an individual element in bytes.
      */
     size_t elemsize;
     /**
      * A pointer to the data.
      */
     void* data;
     /**
      * The allocator used for the data.
      */
     UcxAllocator* allocator;
 } UcxArray;
 /**
  * Sets an element in an arbitrary user defined array.
  * The data is copied from the specified data location.
  *
  * If the capacity is insufficient, the array is automatically reallocated and
  * the possibly new pointer is stored in the <code>array</code> argument.
  *
  * On reallocation the capacity of the array is doubled until it is sufficient.
  * The new capacity is stored back to <code>capacity</code>.
  *
  * @param array a pointer to location of the array pointer
  * @param capacity a pointer to the capacity
  * @param elmsize the size of each element
  * @param idx the index of the element to set
  * @param data a pointer to the element data
  * @return zero on success or non-zero on error (errno will be set)
  */
 #define ucx_array_util_set(array, capacity, elmsize, idx, data) \
     ucx_array_util_set_a(ucx_default_allocator(), (void**)(array), capacity, \
                          elmsize, idx, data)
 /**
  * Sets an element in an arbitrary user defined array.
  * The data is copied from the specified data location.
  *
  * If the capacity is insufficient, the array is automatically reallocated
  * using the specified allocator and the possibly new pointer is stored in
  * the <code>array</code> argument.
  *
  * On reallocation the capacity of the array is doubled until it is sufficient.
  * The new capacity is stored back to <code>capacity</code>.
  *
  * @param alloc the allocator that shall be used to reallocate the array
  * @param array a pointer to location of the array pointer
  * @param capacity a pointer to the capacity
  * @param elmsize the size of each element
  * @param idx the index of the element to set
  * @param data a pointer to the element data
  * @return zero on success or non-zero on error (errno will be set)
  */
 int ucx_array_util_set_a(UcxAllocator* alloc, void** array, size_t* capacity,
     size_t elmsize, size_t idx, void* data);
 /**
  * Stores a pointer in an arbitrary user defined array.
  * The element size of the array must be sizeof(void*).
  *
  * If the capacity is insufficient, the array is automatically reallocated and
  * the possibly new pointer is stored in the <code>array</code> argument.
  *
  * On reallocation the capacity of the array is doubled until it is sufficient.
  * The new capacity is stored back to <code>capacity</code>.
  *
  * @param array a pointer to location of the array pointer
  * @param capacity a pointer to the capacity
  * @param idx the index of the element to set
  * @param ptr the pointer to store
  * @return zero on success or non-zero on error (errno will be set)
  */
 #define ucx_array_util_setptr(array, capacity, idx, ptr) \
     ucx_array_util_setptr_a(ucx_default_allocator(), (void**)(array), \
                             capacity, idx, ptr)
 /**
  * Stores a pointer in an arbitrary user defined array.
  * The element size of the array must be sizeof(void*).
  *
  * If the capacity is insufficient, the array is automatically reallocated
  * using the specified allocator and the possibly new pointer is stored in
  * the <code>array</code> argument.
  *
  * On reallocation the capacity of the array is doubled until it is sufficient.
  * The new capacity is stored back to <code>capacity</code>.
  *
  * @param alloc the allocator that shall be used to reallocate the array
  * @param array a pointer to location of the array pointer
  * @param capacity a pointer to the capacity
  * @param idx the index of the element to set
  * @param ptr the pointer to store
  * @return zero on success or non-zero on error (errno will be set)
  */
 int ucx_array_util_setptr_a(UcxAllocator* alloc, void** array, size_t* capacity,
     size_t idx, void* ptr);
 /**
  * Creates a new UCX array with the given capacity and element size.
  * @param capacity the initial capacity
  * @param elemsize the element size
  * @return a pointer to a new UCX array structure
  */
 UcxArray* ucx_array_new(size_t capacity, size_t elemsize);
 /**
  * Creates a new UCX array using the specified allocator.
  *
  * @param capacity the initial capacity
  * @param elemsize the element size
  * @param allocator the allocator to use
  * @return a pointer to new UCX array structure
  */
 UcxArray* ucx_array_new_a(size_t capacity, size_t elemsize,
         UcxAllocator* allocator);
 /**
  * Initializes a UCX array structure with the given capacity and element size.
  * The structure must be uninitialized as the data pointer will be overwritten.
  *
  * @param array the structure to initialize
  * @param capacity the initial capacity
  * @param elemsize the element size
  */
 void ucx_array_init(UcxArray* array, size_t capacity, size_t elemsize);
 /**
  * Initializes a UCX array structure using the specified allocator.
  * The structure must be uninitialized as the data pointer will be overwritten.
  *
  * @param array the structure to initialize
  * @param capacity the initial capacity
  * @param elemsize the element size
  * @param allocator the allocator to use
  */
 void ucx_array_init_a(UcxArray* array, size_t capacity, size_t elemsize,
         UcxAllocator* allocator);
 /**
  * Creates an shallow copy of an array.
  *
  * This function clones the specified array by using memcpy().
  * If the destination capacity is insufficient, an automatic reallocation is
  * attempted.
  *
  * Note: if the destination array is uninitialized, the behavior is undefined.
  *
  * @param dest the array to copy to
  * @param src the array to copy from
  * @return zero on success, non-zero on reallocation failure.
  */
 int ucx_array_clone(UcxArray* dest, UcxArray const* src);
 /**
  * Compares two UCX arrays element-wise by using a compare function.
  *
  * Elements of the two specified arrays are compared by using the specified
  * compare function and the additional data. The type and content of this
  * additional data depends on the cmp_func() used.
  *
  * This function always returns zero, if the element sizes of the arrays do
  * not match and performs no comparisons in this case.
  *
  * @param array1 the first array
  * @param array2 the second array
  * @param cmpfnc the compare function
  * @param data additional data for the compare function
  * @return 1, if and only if the two arrays equal element-wise, 0 otherwise
  */
 int ucx_array_equals(UcxArray const *array1, UcxArray const *array2,
         cmp_func cmpfnc, void* data);
 /**
  * Destroys the array.
  *
  * The data is freed and both capacity and count are reset to zero.
  * If the array structure itself has been dynamically allocated, it has to be
  * freed separately.
  *
  * @param array the array to destroy
  */
 void ucx_array_destroy(UcxArray *array);
 /**
  * Destroys and frees the array.
  *
  * @param array the array to free
  */
 void ucx_array_free(UcxArray *array);
 /**
  * Inserts elements at the end of the array.
  *
  * This is an O(1) operation.
  * The array will automatically grow, if the capacity is exceeded.
  * If a pointer to data is provided, the data is copied into the array with
  * memcpy(). Otherwise the new elements are completely zeroed.
  *
  * @param array a pointer the array where to append the data
  * @param data a pointer to the data to insert (may be <code>NULL</code>)
  * @param count number of elements to copy from data (if data is
  * <code>NULL</code>, zeroed elements are appended)
  * @return zero on success, non-zero if a reallocation was necessary but failed
  * @see ucx_array_set_from()
  * @see ucx_array_append()
  */
 int ucx_array_append_from(UcxArray *array, void *data, size_t count);
 /**
  * Inserts elements at the beginning of the array.
  *
  * This is an expensive operation, because the contents must be moved.
  * If there is no particular reason to prepend data, you should use
  * ucx_array_append_from() instead.
  *
  * @param array a pointer the array where to prepend the data
  * @param data a pointer to the data to insert (may be <code>NULL</code>)
  * @param count number of elements to copy from data (if data is
  * <code>NULL</code>, zeroed elements are inserted)
  * @return zero on success, non-zero if a reallocation was necessary but failed
  * @see ucx_array_append_from()
  * @see ucx_array_set_from()
  * @see ucx_array_prepend()
  */
 int ucx_array_prepend_from(UcxArray *array, void *data, size_t count);
 /**
  * Sets elements starting at the specified index.
  *
  * If the any index is out of bounds, the array automatically grows.
  * The pointer to the data may be NULL, in which case the elements are zeroed.
  *
  * @param array a pointer the array where to set the data
  * @param index the index of the element to set
  * @param data a pointer to the data to insert (may be <code>NULL</code>)
  * @param count number of elements to copy from data (if data is
  * <code>NULL</code>, the memory in the array is zeroed)
  * @return zero on success, non-zero if a reallocation was necessary but failed
  * @see ucx_array_append_from()
  * @see ucx_array_set()
  */
 int ucx_array_set_from(UcxArray *array, size_t index, void *data, size_t count);
 /**
  * Concatenates two arrays.
  *
  * The contents of the second array are appended to the first array in one
  * single operation. The second array is otherwise left untouched.
  *
  * The first array may grow automatically. If this fails, both arrays remain
  * unmodified.
  *
  * @param array1 first array
  * @param array2 second array
  * @return zero on success, non-zero if reallocation was necessary but failed
  * or the element size does not match
  */
 int ucx_array_concat(UcxArray *array1, const UcxArray *array2);
 /**
  * Returns a pointer to the array element at the specified index.
  *
  * @param array the array to retrieve the element from
  * @param index index of the element to return
  * @return a pointer to the element at the specified index or <code>NULL</code>,
  * if the index is greater than the array size
  */
 void *ucx_array_at(UcxArray const* array, size_t index);
 /**
  * Returns the index of an element containing the specified data.
  *
  * This function uses a cmp_func() to compare the data of each list element
  * with the specified data. If no cmp_func is provided, memcmp() is used.
  *
  * If the array contains the data more than once, the index of the first
  * occurrence is returned.
  * If the array does not contain the data, the size of array is returned.
  *
  * @param array the array where to search for the data
  * @param elem the element data
  * @param cmpfnc the compare function
  * @param data additional data for the compare function
  * @return the index of the element containing the specified data or the size of
  * the array, if the data is not found in this array
  */
 size_t ucx_array_find(UcxArray const *array, void *elem,
     cmp_func cmpfnc, void *data);
 /**
  * Checks, if an array contains a specific element.
  *
  * An element is found, if ucx_array_find() returns a value less than the size.
  *
  * @param array the array where to search for the data
  * @param elem the element data
  * @param cmpfnc the compare function
  * @param data additional data for the compare function
  * @return 1, if and only if the array contains the specified element data
  * @see ucx_array_find()
  */
 int ucx_array_contains(UcxArray const *array, void *elem,
     cmp_func cmpfnc, void *data);
 /**
  * Sorts a UcxArray with the best available sort algorithm.
  *
  * The qsort_r() function is used, if available (glibc, FreeBSD or MacOS).
  * The order of arguments is automatically adjusted for the FreeBSD and MacOS
  * version of qsort_r().
  *
  * If qsort_r() is not available, a merge sort algorithm is used, which is
  * guaranteed to use no more additional memory than for exactly one element.
  *
  * @param array the array to sort
  * @param cmpfnc the function that shall be used to compare the element data
  * @param data additional data for the cmp_func() or <code>NULL</code>
  */
 void ucx_array_sort(UcxArray* array, cmp_func cmpfnc, void *data);
 /**
  * Removes an element from the array.
  *
  * This is in general an expensive operation, because several elements may
  * be moved. If the order of the elements is not relevant, use
  * ucx_array_remove_fast() instead.
  *
  * @param array pointer to the array from which the element shall be removed
  * @param index the index of the element to remove
  */
 void ucx_array_remove(UcxArray *array, size_t index);
 /**
  * Removes an element from the array.
  *
  * This is an O(1) operation, but does not maintain the order of the elements.
  * The last element in the array is moved to the location of the removed
  * element.
  *
  * @param array pointer to the array from which the element shall be removed
  * @param index the index of the element to remove
  */
 void ucx_array_remove_fast(UcxArray *array, size_t index);
 /**
  * Shrinks the memory to exactly fit the contents.
  *
  * After this operation, the capacity equals the size.
  *
  * @param array a pointer to the array
  * @return zero on success, non-zero if reallocation failed
  */
 int ucx_array_shrink(UcxArray* array);
 /**
  * Sets the capacity of the array.
  *
  * If the new capacity is smaller than the size of the array, the elements
  * are removed and the size is adjusted accordingly.
  *
  * @param array a pointer to the array
  * @param capacity the new capacity
  * @return zero on success, non-zero if reallocation failed
  */
 int ucx_array_resize(UcxArray* array, size_t capacity);
 /**
  * Resizes the array only, if the capacity is insufficient.
  *
  * If the requested capacity is smaller than the current capacity, this
  * function does nothing.
  *
  * @param array a pointer to the array
  * @param capacity the guaranteed capacity
  * @return zero on success, non-zero if reallocation failed
  */
 int ucx_array_reserve(UcxArray* array, size_t capacity);
 /**
  * Resizes the capacity, if the specified number of elements would not fit.
  *
  * A call to ucx_array_grow(array, count) is effectively the same as
  * ucx_array_reserve(array, array->size+count).
  *
  * @param array a pointer to the array
  * @param count the number of elements that should additionally fit
  * into the array
  * @return zero on success, non-zero if reallocation failed
  */
 int ucx_array_grow(UcxArray* array, size_t count);
 #ifdef	__cplusplus
 }
 #endif
 #endif	/* UCX_ARRAY_H */

Mercurial > hg > ucx / annotate

src/ucx/array.h@28a8ccc442b0 (annotated)

src/ucx/array.h