static ut64 __lseek(RIO *io, RIODesc *fd, ut64 offset, int whence) {
switch (whence) {
case SEEK_SET: return offset;
case SEEK_CUR: return io->off + offset;
case SEEK_END: return RIOBFDBG_SZ (fd);
}
return offset;
}
static int __read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
RIOBfdbg *riom;
int sz;
if (!fd || !fd->data) {
return -1;
}
riom = fd->data;
/* data base buffer */
if (is_in_base (io->off, riom->bfvm)) {
int n = io->off-riom->bfvm->base;
if (n > count) {
count = n;
}
memcpy (buf, riom->bfvm->mem+n, count);
return count;
}
/* screen buffer */
if (is_in_screen (io->off, riom->bfvm)) {
int n = io->off-riom->bfvm->screen;
if (n > count) {
count = riom->bfvm->screen_size - n;
}
memcpy (buf, riom->bfvm->screen_buf+n, count);
return count;
}
/* input buffer */
if (is_in_input (io->off, riom->bfvm)) {
int n = io->off-riom->bfvm->input;
if (n > count) {
count = riom->bfvm->input_size - n;
}
memcpy (buf, riom->bfvm->input_buf+n, count);
return count;
}
/* read from file */
sz = RIOBFDBG_SZ (fd);
if (io->off + count >= sz) {
count = sz - io->off;
}
if (io->off >= sz) {
return -1;
}
memcpy (buf, RIOBFDBG_BUF (fd)+io->off, count);
return count;
}
static int __write(RIO *io, RIODesc *fd, const ut8 *buf, int count) {
RIOBfdbg *riom;
int sz;
if (fd == NULL || fd->data == NULL)
return -1;
riom = fd->data;
/* data base buffer */
if (is_in_base (io->off, riom->bfvm)) {
int n = io->off-riom->bfvm->base;
if (n>count)
count = n;
memcpy (riom->bfvm->mem+n, buf, count);
return count;
}
/* screen buffer */
if (is_in_screen (io->off, riom->bfvm)) {
int n = io->off-riom->bfvm->screen;
if (n>count)
count = riom->bfvm->screen_size-n;
memcpy (riom->bfvm->screen_buf+n, buf, count);
return count;
}
/* input buffer */
if (is_in_input (io->off, riom->bfvm)) {
int n = io->off-riom->bfvm->input;
if (n>count)
count = riom->bfvm->input_size-n;
memcpy (riom->bfvm->input_buf+n, buf, count);
return count;
}
/* read from file */
sz = RIOBFDBG_SZ (fd);
if (io->off+count >= sz)
count = sz-io->off;
if (io->off >= sz)
return -1;
memcpy (RIOBFDBG_BUF (fd)+io->off, buf, count);
return count;
}
