mirror of
https://github.com/radareorg/radare2.git
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961d5007a9
* Fix some memory leaks * Mark r_buf_data as deprecated * Remove some spaguetti (-42LOC) * Fix buf license header authorship * Make parser functions return void for simplicity
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/* radare - LGPL - Copyright 2009-2020 - ret2libc */
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#include <r_util.h>
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struct buf_bytes_user {
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const ut8 *data;
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const ut8 *data_steal;
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ut64 length;
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bool steal;
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};
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struct buf_bytes_priv {
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ut8 *buf;
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ut64 length;
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ut64 offset;
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bool is_bufowner;
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};
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static inline struct buf_bytes_priv *get_priv_bytes(RBuffer *b) {
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struct buf_bytes_priv *priv = (struct buf_bytes_priv *)b->priv;
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r_warn_if_fail (priv);
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return priv;
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}
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static bool buf_bytes_init(RBuffer *b, const void *user) {
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const struct buf_bytes_user *u = (const struct buf_bytes_user *)user;
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struct buf_bytes_priv *priv = R_NEW0 (struct buf_bytes_priv);
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if (!priv) {
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return false;
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}
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priv->offset = 0;
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priv->length = u->length;
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if (u->data_steal) {
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priv->buf = (ut8 *)u->data_steal;
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priv->is_bufowner = u->steal;
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} else {
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priv->buf = malloc (priv->length);
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if (!priv->buf) {
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free (priv);
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return NULL;
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}
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if (priv->length) {
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memmove (priv->buf, u->data, priv->length);
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}
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priv->is_bufowner = true;
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}
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b->priv = priv;
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return true;
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}
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static bool buf_bytes_fini(RBuffer *b) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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if (priv->is_bufowner) {
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free (priv->buf);
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}
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R_FREE (b->priv);
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return true;
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}
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static bool buf_bytes_resize(RBuffer *b, ut64 newsize) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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if (newsize > priv->length) {
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ut8 *t = realloc (priv->buf, newsize);
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if (!t) {
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return false;
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}
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priv->buf = t;
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memset (priv->buf + priv->length, b->Oxff_priv, newsize - priv->length);
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}
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priv->length = newsize;
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return true;
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}
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static st64 buf_bytes_read(RBuffer *b, ut8 *buf, ut64 len) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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ut64 real_len = priv->length < priv->offset? 0: R_MIN (priv->length - priv->offset, len);
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memmove (buf, priv->buf + priv->offset, real_len);
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priv->offset += real_len;
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return real_len;
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}
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static st64 buf_bytes_write(RBuffer *b, const ut8 *buf, ut64 len) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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if (priv->offset > priv->length || priv->offset + len >= priv->length) {
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bool r = r_buf_resize (b, priv->offset + len);
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if (!r) {
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return -1;
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}
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}
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memmove (priv->buf + priv->offset, buf, len);
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priv->offset += len;
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return len;
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}
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static ut64 buf_bytes_get_size(RBuffer *b) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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return priv->length;
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}
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static st64 buf_bytes_seek(RBuffer *b, st64 addr, int whence) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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if (addr < 0 && (-addr) > (st64)priv->offset) {
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return -1;
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}
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switch (whence) {
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case R_BUF_CUR:
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priv->offset += addr;
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break;
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case R_BUF_SET:
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priv->offset = addr;
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break;
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case R_BUF_END:
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priv->offset = priv->length + addr;
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break;
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default:
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r_warn_if_reached ();
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return -1;
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}
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return priv->offset;
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}
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static ut8 *buf_bytes_get_whole_buf(RBuffer *b, ut64 *sz) {
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struct buf_bytes_priv *priv = get_priv_bytes (b);
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if (sz) {
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*sz = priv->length;
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}
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return priv->buf;
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}
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static const RBufferMethods buffer_bytes_methods = {
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.init = buf_bytes_init,
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.fini = buf_bytes_fini,
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.read = buf_bytes_read,
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.write = buf_bytes_write,
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.get_size = buf_bytes_get_size,
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.resize = buf_bytes_resize,
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.seek = buf_bytes_seek,
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.get_whole_buf = buf_bytes_get_whole_buf
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};
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