/*
* raises: EOF_ERROR
*/
static void cmpdi_read_i(InStream *is, uchar *b, int len)
{
CompoundInStream *cis = is->d.cis;
off_t start = is_pos(is);
if ((start + len) > cis->length) {
RAISE(EOF_ERROR, "Tried to read past end of file. File length is "
"<%"F_OFF_T_PFX"d> and tried to read to <%"F_OFF_T_PFX"d>",
cis->length, start + len);
}
is_seek(cis->sub, cis->offset + start);
is_read_bytes(cis->sub, b, len);
}
static void copy_files(const char *fname, void *arg)
{
struct CopyFileArg *cfa = (struct CopyFileArg *)arg;
OutStream *os = cfa->to_store->new_output(cfa->to_store, fname);
InStream *is = cfa->from_store->open_input(cfa->from_store, fname);
int len = (int)is_length(is);
uchar *buffer = ALLOC_N(uchar, len + 1);
is_read_bytes(is, buffer, len);
os_write_bytes(os, buffer, len);
is_close(is);
os_close(os);
free(buffer);
}
static void cw_copy_file(CompoundWriter *cw, CWFileEntry *src, OutStream *os)
{
off_t start_ptr = os_pos(os);
off_t end_ptr;
off_t remainder, length, len;
uchar buffer[BUFFER_SIZE];
InStream *is = cw->store->open_input(cw->store, src->name);
remainder = length = is_length(is);
while (remainder > 0) {
len = MIN(remainder, BUFFER_SIZE);
is_read_bytes(is, buffer, len);
os_write_bytes(os, buffer, len);
remainder -= len;
}
/* Verify that remainder is 0 */
if (remainder != 0) {
RAISE(IO_ERROR, "There seems to be an error in the compound file "
"should have read to the end but there are <%"F_OFF_T_PFX"d> "
"bytes left", remainder);
}
/* Verify that the output length diff is equal to original file */
end_ptr = os_pos(os);
len = end_ptr - start_ptr;
if (len != length) {
RAISE(IO_ERROR, "Difference in compound file output file offsets "
"<%"F_OFF_T_PFX"d> does not match the original file lenght "
"<%"F_OFF_T_PFX"d>", len, length);
}
is_close(is);
}
