72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
// SPDX-License-Identifier: LGPL-3.0-only
|
|
|
|
#include <rz_util.h>
|
|
|
|
struct buf_mmap_user {
|
|
const char *filename;
|
|
int perm;
|
|
int mode;
|
|
};
|
|
|
|
// "subclass"" of buf_bytes_priv
|
|
struct buf_mmap_priv {
|
|
// NOTE: this needs to be first, so that bytes operations will work without changes
|
|
struct buf_bytes_priv bytes_priv;
|
|
RzMmap *mmap;
|
|
};
|
|
|
|
static inline struct buf_mmap_priv *get_priv_mmap(RzBuffer *b) {
|
|
struct buf_mmap_priv *priv = (struct buf_mmap_priv *)b->priv;
|
|
rz_warn_if_fail(priv);
|
|
return priv;
|
|
}
|
|
|
|
static bool buf_mmap_init(RzBuffer *b, const void *user) {
|
|
const struct buf_mmap_user *u = (const struct buf_mmap_user *)user;
|
|
struct buf_mmap_priv *priv = RZ_NEW0(struct buf_mmap_priv);
|
|
if (!priv) {
|
|
return false;
|
|
}
|
|
|
|
priv->mmap = rz_file_mmap(u->filename, u->perm, u->mode, 0);
|
|
if (!priv->mmap) {
|
|
free(priv);
|
|
return false;
|
|
}
|
|
priv->bytes_priv.buf = priv->mmap->buf;
|
|
priv->bytes_priv.length = priv->mmap->len;
|
|
priv->bytes_priv.offset = 0;
|
|
b->priv = priv;
|
|
b->fd = priv->mmap->fd;
|
|
return true;
|
|
}
|
|
|
|
static bool buf_mmap_fini(RzBuffer *b) {
|
|
struct buf_mmap_priv *priv = get_priv_mmap(b);
|
|
rz_file_mmap_free(priv->mmap);
|
|
RZ_FREE(b->priv);
|
|
return true;
|
|
}
|
|
|
|
static bool buf_mmap_resize(RzBuffer *b, ut64 newsize) {
|
|
struct buf_mmap_priv *priv = get_priv_mmap(b);
|
|
if (newsize > priv->mmap->len) {
|
|
ut8 *t = rz_file_mmap_resize(priv->mmap, newsize);
|
|
if (!t) {
|
|
return false;
|
|
}
|
|
priv->bytes_priv.buf = t;
|
|
}
|
|
priv->bytes_priv.length = newsize;
|
|
return true;
|
|
}
|
|
|
|
static const RzBufferMethods buffer_mmap_methods = {
|
|
.init = buf_mmap_init,
|
|
.fini = buf_mmap_fini,
|
|
.read = buf_bytes_read,
|
|
.write = buf_bytes_write,
|
|
.get_size = buf_bytes_get_size,
|
|
.resize = buf_mmap_resize,
|
|
.seek = buf_bytes_seek,
|
|
};
|