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71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/* radare - LGPL - Copyright 2013-2017 - pancake */
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#include "r_io.h"
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R_API void r_io_buffer_close(RIO* io) {
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r_cache_flush (io->buffer);
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io->buffer_enabled = 0;
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}
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R_API int r_io_buffer_load(RIO* io, ut64 addr, int len) {
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ut64 at;
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int i, r;
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ut8 buf[512];
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if (len < 1) {
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return false;
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}
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io->buffer_enabled = 0;
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for (i = 0; i < len; i += sizeof (buf)) {
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at = addr + i;
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(void) r_io_seek (io, at, R_IO_SEEK_SET);
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memset (buf, 0xff, sizeof (buf));
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r = r_io_read (io, buf, sizeof (buf));
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if (r < 1) {
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break;
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}
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r_cache_set (io->buffer, at, buf, sizeof (buf));
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}
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io->buffer_enabled = 1;
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return true;
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}
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R_API const ut8* r_io_buffer_get (RIO *io, ut64 addr, int *len) {
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return r_cache_get (io->buffer, addr, len);
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}
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R_API int r_io_buffer_read (RIO *io, ut64 addr, ut8* buf, int len) {
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const ut8 *ret;
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int next, l = 0;
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// align addr if out of buffer if its mapped on io //
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ret = r_cache_get (io->buffer, addr, &l);
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if (!ret) {
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if (l < 1) {
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return 0; // no next block in buffer cache
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}
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if (l > len) {
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return 0; // next block too far
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}
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next = l;
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ret = r_cache_get (io->buffer, addr + next + 1, &l);
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if (!ret) {
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return 0;
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}
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if (l < len) {
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memset (buf + l, 0xff, len - l);
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}
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if (l > len) {
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l = len;
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}
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memset (buf, 0xff, next);
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memcpy (buf + next, ret, len - next);
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return len;
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}
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if (l > len) {
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l = len;
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} else if (l < len) {
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memset (buf + l, 0xff, len - l);
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}
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memcpy (buf, ret, l);
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return l;
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}
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