mirror of
https://github.com/radareorg/radare2.git
synced 2024-12-01 17:40:34 +00:00
60a951e9b1
Implement io.buffer for fast IO (work in progress) Rewrite util/cache.c and use it form io/buffer.c Refactor util/ht.c and util/ht64.c to reuse code Various minor fixes in RIO api cache.c must be rewritten into r_buf for
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* radare - LGPL - Copyright 2013 - pancake */
|
|
|
|
#include "r_io.h"
|
|
|
|
R_API void r_io_buffer_close(RIO* io) {
|
|
r_cache_flush (io->buffer);
|
|
io->buffer_enabled = 0;
|
|
}
|
|
|
|
R_API int r_io_buffer_load(RIO* io, ut64 addr, int len) {
|
|
ut64 at;
|
|
int i, r;
|
|
ut8 buf[512];
|
|
if (len<1) return R_FALSE;
|
|
io->buffer_enabled = 0;
|
|
for (i=0; i<len; i+=sizeof (buf)) {
|
|
at = addr+i; //r_io_section_vaddr_to_offset (io, addr+i);
|
|
//r_io_seek (io, addr+i, R_IO_SEEK_SET);
|
|
r_io_seek (io, at, R_IO_SEEK_SET);
|
|
memset (buf, 0xff, sizeof (buf));
|
|
r = r_io_read (io, buf, sizeof (buf));
|
|
//eprintf ("r=%d %llx\n", r, addr+i);
|
|
//if (buf[0] !=0xff) eprintf ("STORE %02x %02x %02x\n", buf[0], buf[1], buf[2]);
|
|
if (r<1) break;
|
|
r_cache_set (io->buffer, at, buf, sizeof (buf));
|
|
}
|
|
io->buffer_enabled = 1;
|
|
return R_TRUE;
|
|
}
|
|
|
|
R_API const ut8* r_io_buffer_get (RIO *io, ut64 addr, int *len) {
|
|
return r_cache_get (io->buffer, addr, len);
|
|
}
|
|
|
|
R_API int r_io_buffer_read (RIO *io, ut64 addr, ut8* buf, int len) {
|
|
const ut8 *ret;
|
|
int next, l = 0;
|
|
// align addr if out of buffer if its mapped on io //
|
|
ret = r_cache_get (io->buffer, addr, &l);
|
|
if (!ret) {
|
|
if (l<1) return 0; // no next block in buffer cache
|
|
if (l>len) return 0; // next block too far
|
|
next = l;
|
|
ret = r_cache_get (io->buffer, addr+next+1, &l);
|
|
if (!ret) return 0;
|
|
if (l<len) memset (buf+l, 0xff, (len-l));
|
|
if (l>len) l = len;
|
|
memset (buf, 0xff, next);
|
|
memcpy (buf+next, ret, (len-next));
|
|
return len;
|
|
}
|
|
if (l>len) l = len;
|
|
else if (l<len) memset (buf+l, 0xff, (len-l));
|
|
memcpy (buf, ret, l);
|
|
return l;
|
|
}
|