107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
#include "cig.h"
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#include <stdio.h>
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void *dyn_array_create_func(dyn_array_create_func_args_t args) {
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void *bytes = dyn_array_create_non_crashing_func(
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(dyn_array_create_non_crashing_func_args_t) {
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.allocator=args.allocator,
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.itemsize=args.itemsize,
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.initial_capacity=args.initial_capacity,
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.file=args.file,
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.line=args.line
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}
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);
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if (bytes == NULL) {
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fprintf(
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stderr,
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"%s:%d: allocator returned NULL\n",
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args.file,
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args.line
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);
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exit(1);
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}
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return bytes;
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}
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void *dyn_array_grow_func(void *this, size_t n_new_items, const char *file, int line) {
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void *bytes = dyn_array_grow_non_crashing_func(this, n_new_items, file, line);
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if (bytes == NULL) {
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fprintf(
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stderr,
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"%s:%d: allocator returned NULL\n",
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file,
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line
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);
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}
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return bytes;
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}
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void *dyn_array_create_non_crashing_func(dyn_array_create_non_crashing_func_args_t args) {
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dyn_array_header_t *header = allocator_alloc_func(
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args.allocator,
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sizeof(dyn_array_header_t) + args.itemsize * args.initial_capacity,
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args.file,
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args.line
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);
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if (header == NULL) { return NULL; }
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header->size = 0;
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header->capacity = args.initial_capacity;
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header->itemsize = args.itemsize;
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header->allocator = args.allocator;
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return &header->bytes;
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}
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void *dyn_array_grow_non_crashing_func(void *this, size_t n_new_items, const char *file, int line) {
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dyn_array_header_t *header = PTR_FROM_FIELD_PTR(dyn_array_header_t, bytes, this);
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size_t new_size = header->size + n_new_items;
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if (header->capacity < new_size) {
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size_t cap_times_2 = header->capacity * 2;
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size_t new_capacity =
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cap_times_2 < new_size
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? new_size
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: cap_times_2;
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header = allocator_resize_func(
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header->allocator,
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header,
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sizeof(dyn_array_header_t) + header->itemsize * new_capacity,
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file,
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line
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);
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if (header == NULL) { return NULL; }
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header->capacity = new_capacity;
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header->size = new_size;
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}
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return &header->bytes;
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}
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void dyn_array_shrink_func(void *this, size_t n_items_to_remove, const char *file, int line) {
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if (dyn_array_length(this) < n_items_to_remove) {
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fprintf(
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stderr,
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"%s:%d: tried to remove more items than contained in dynamic array.\n",
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file,
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line
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);
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exit(1);
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}
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dyn_array_header_t *header = PTR_FROM_FIELD_PTR(dyn_array_header_t, bytes, this);
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header->size -= n_items_to_remove;
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}
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size_t dyn_array_length(void *this) {
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dyn_array_header_t *header = PTR_FROM_FIELD_PTR(dyn_array_header_t, bytes, this);
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return header->size;
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}
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size_t dyn_array_capacity(void *this) {
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dyn_array_header_t *header = PTR_FROM_FIELD_PTR(dyn_array_header_t, bytes, this);
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return header->capacity;
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}
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void dyn_array_destroy(void *this) {
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dyn_array_header_t *header = PTR_FROM_FIELD_PTR(dyn_array_header_t, bytes, this);
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allocator_free(header->allocator, header);
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}
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