diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/darray.c | 90 | ||||
| -rw-r--r-- | src/darray.h | 97 | ||||
| -rw-r--r-- | src/main.c | 1 |
3 files changed, 0 insertions, 188 deletions
diff --git a/src/darray.c b/src/darray.c deleted file mode 100644 index 3e66a55..0000000 --- a/src/darray.c +++ /dev/null @@ -1,90 +0,0 @@ -// Copyright © Tavian Barnes <tavianator@tavianator.com> -// SPDX-License-Identifier: 0BSD - -#include "darray.h" -#include <stdlib.h> -#include <string.h> - -/** - * The darray header. - */ -struct darray { - /** The current capacity of the array, as a count of elements. */ - size_t capacity; - /** The current length of the array. */ - size_t length; - - // The array elements are stored after this header in memory. Not using - // a flexible array member to avoid worrying about strict aliasing. We - // assume that 2*sizeof(size_t) keeps any memory allocation suitably - // aligned for the element type. -}; - -/** Get the header for a darray. */ -static struct darray *darray_header(const void *da) { - return (struct darray *)da - 1; -} - -/** Get the array from a darray header. */ -static char *darray_data(struct darray *header) { - return (char *)(header + 1); -} - -size_t darray_length(const void *da) { - if (da) { - return darray_header(da)->length; - } else { - return 0; - } -} - -void *darray_push(void *da, const void *item, size_t size) { - struct darray *header; - if (da) { - header = darray_header(da); - } else { - header = malloc(sizeof(*header) + size); - if (!header) { - return NULL; - } - header->capacity = 1; - header->length = 0; - } - - size_t capacity = header->capacity; - size_t i = header->length++; - if (i >= capacity) { - capacity *= 2; - header = realloc(header, sizeof(*header) + capacity * size); - if (!header) { - // This failure will be detected by darray_check() - return da; - } - header->capacity = capacity; - } - - char *data = darray_data(header); - memcpy(data + i * size, item, size); - return data; -} - -int darray_check(void *da) { - if (!da) { - return -1; - } - - struct darray *header = darray_header(da); - if (header->length <= header->capacity) { - return 0; - } else { - // realloc() failed in darray_push(), so reset the length and report the failure - header->length = header->capacity; - return -1; - } -} - -void darray_free(void *da) { - if (da) { - free(darray_header(da)); - } -} diff --git a/src/darray.h b/src/darray.h deleted file mode 100644 index cc6cc42..0000000 --- a/src/darray.h +++ /dev/null @@ -1,97 +0,0 @@ -// Copyright © Tavian Barnes <tavianator@tavianator.com> -// SPDX-License-Identifier: 0BSD - -/** - * A dynamic array library. - * - * darrays are represented by a simple pointer to the array element type, like - * any other array. Behind the scenes, the capacity and current length of the - * array are stored along with it. NULL is a valid way to initialize an empty - * darray: - * - * int *darray = NULL; - * - * To append an element to a darray, use the DARRAY_PUSH macro: - * - * int e = 42; - * if (DARRAY_PUSH(&darray, &e) != 0) { - * // Report the error... - * } - * - * The length can be retrieved by darray_length(). Iterating over the array - * works like normal arrays: - * - * for (size_t i = 0; i < darray_length(darray); ++i) { - * printf("%d\n", darray[i]); - * } - * - * To free a darray, use darray_free(): - * - * darray_free(darray); - */ - -#ifndef BFS_DARRAY_H -#define BFS_DARRAY_H - -#include <stddef.h> - -/** - * Get the length of a darray. - * - * @param da - * The array in question. - * @return - * The length of the array. - */ -size_t darray_length(const void *da); - -/** - * @internal Use DARRAY_PUSH(). - * - * Push an element into a darray. - * - * @param da - * The array to append to. - * @param item - * The item to append. - * @param size - * The size of the item. - * @return - * The (new) location of the array. - */ -void *darray_push(void *da, const void *item, size_t size); - -/** - * @internal Use DARRAY_PUSH(). - * - * Check if the last darray_push() call failed. - * - * @param da - * The darray to check. - * @return - * 0 on success, -1 on failure. - */ -int darray_check(void *da); - -/** - * Free a darray. - * - * @param da - * The darray to free. - */ -void darray_free(void *da); - -/** - * Push an item into a darray. - * - * @param da - * The array to append to. - * @param item - * A pointer to the item to append. - * @return - * 0 on success, -1 on failure. - */ -#define DARRAY_PUSH(da, item) \ - (darray_check(*(da) = darray_push(*(da), (item), sizeof(**(da) = *(item))))) - -#endif // BFS_DARRAY_H @@ -27,7 +27,6 @@ * - bfstd.[ch] (standard library wrappers/polyfills) * - color.[ch] (for pretty terminal colors) * - config.h (configuration and feature/platform detection) - * - darray.[ch] (a dynamic array library) * - diag.[ch] (formats diagnostic messages) * - dir.[ch] (a directory API facade) * - dstring.[ch] (a dynamic string library) |