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90ad4e28e8
Update the code slightly so that abuf can be used in U-Boot tools. It will soon be needed for proftool. Signed-off-by: Simon Glass <sjg@chromium.org>
131 lines
2.4 KiB
C
131 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Handles a buffer that can be allocated and freed
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*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef USE_HOSTCC
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#include <common.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <string.h>
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#endif
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#include <abuf.h>
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void abuf_set(struct abuf *abuf, void *data, size_t size)
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{
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abuf_uninit(abuf);
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abuf->data = data;
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abuf->size = size;
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}
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#ifndef USE_HOSTCC
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void abuf_map_sysmem(struct abuf *abuf, ulong addr, size_t size)
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{
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abuf_set(abuf, map_sysmem(addr, size), size);
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}
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#else
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/* copied from lib/string.c for convenience */
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static char *memdup(const void *src, size_t len)
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{
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char *p;
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p = malloc(len);
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if (!p)
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return NULL;
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memcpy(p, src, len);
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return p;
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}
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#endif
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bool abuf_realloc(struct abuf *abuf, size_t new_size)
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{
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void *ptr;
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if (!new_size) {
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/* easy case, just need to uninit, freeing any allocation */
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abuf_uninit(abuf);
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return true;
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} else if (abuf->alloced) {
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/* currently allocated, so need to reallocate */
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ptr = realloc(abuf->data, new_size);
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if (!ptr)
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return false;
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abuf->data = ptr;
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abuf->size = new_size;
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return true;
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} else if (new_size <= abuf->size) {
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/*
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* not currently alloced and new size is no larger. Just update
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* it. Data is lost off the end if new_size < abuf->size
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*/
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abuf->size = new_size;
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return true;
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} else {
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/* not currently allocated and new size is larger. Alloc and
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* copy in data. The new space is not inited.
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*/
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ptr = malloc(new_size);
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if (!ptr)
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return false;
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if (abuf->size)
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memcpy(ptr, abuf->data, abuf->size);
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abuf->data = ptr;
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abuf->size = new_size;
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abuf->alloced = true;
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return true;
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}
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}
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void *abuf_uninit_move(struct abuf *abuf, size_t *sizep)
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{
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void *ptr;
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if (sizep)
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*sizep = abuf->size;
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if (!abuf->size)
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return NULL;
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if (abuf->alloced) {
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ptr = abuf->data;
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} else {
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ptr = memdup(abuf->data, abuf->size);
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if (!ptr)
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return NULL;
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}
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/* Clear everything out so there is no record of the data */
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abuf_init(abuf);
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return ptr;
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}
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void abuf_init_set(struct abuf *abuf, void *data, size_t size)
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{
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abuf_init(abuf);
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abuf_set(abuf, data, size);
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}
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void abuf_init_move(struct abuf *abuf, void *data, size_t size)
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{
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abuf_init_set(abuf, data, size);
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abuf->alloced = true;
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}
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void abuf_uninit(struct abuf *abuf)
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{
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if (abuf->alloced)
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free(abuf->data);
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abuf_init(abuf);
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}
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void abuf_init(struct abuf *abuf)
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{
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abuf->data = NULL;
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abuf->size = 0;
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abuf->alloced = false;
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}
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