static boolean fill_input_buffer(j_decompress_ptr cinfo)
{
struct jpeg_source_mgr *src = cinfo->src;
fz_dctd *state = cinfo->client_data;
fz_stream *curr_stm = state->curr_stm;
fz_context *ctx = curr_stm->ctx;
curr_stm->rp = curr_stm->wp;
fz_try(ctx)
{
fz_fill_buffer(curr_stm);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
return 0;
}
src->next_input_byte = curr_stm->rp;
src->bytes_in_buffer = curr_stm->wp - curr_stm->rp;
if (src->bytes_in_buffer == 0)
{
static unsigned char eoi[2] = { 0xFF, JPEG_EOI };
fz_warn(state->ctx, "premature end of file in jpeg");
src->next_input_byte = eoi;
src->bytes_in_buffer = 2;
}
return 1;
}
static int
read_flated(fz_stream *stm, unsigned char *outbuf, int outlen)
{
fz_flate *state = stm->state;
fz_stream *chain = state->chain;
z_streamp zp = &state->z;
int code;
zp->next_out = outbuf;
zp->avail_out = outlen;
while (zp->avail_out > 0)
{
if (chain->rp == chain->wp)
fz_fill_buffer(chain);
zp->next_in = chain->rp;
zp->avail_in = chain->wp - chain->rp;
code = inflate(zp, Z_SYNC_FLUSH);
chain->rp = chain->wp - zp->avail_in;
if (code == Z_STREAM_END)
{
return outlen - zp->avail_out;
}
else if (code == Z_BUF_ERROR)
{
fz_warn(stm->ctx, "premature end of data in flate filter");
return outlen - zp->avail_out;
}
else if (code == Z_DATA_ERROR && zp->avail_in == 0)
{
fz_warn(stm->ctx, "ignoring zlib error: %s", zp->msg);
return outlen - zp->avail_out;
}
else if (code == Z_DATA_ERROR && !strcmp(zp->msg, "incorrect data check"))
{
fz_warn(stm->ctx, "ignoring zlib error: %s", zp->msg);
chain->rp = chain->wp;
return outlen - zp->avail_out;
}
else if (code != Z_OK)
{
fz_throw(stm->ctx, FZ_ERROR_GENERIC, "zlib error: %s", zp->msg);
}
}
return outlen - zp->avail_out;
}
static boolean fill_input_buffer(j_decompress_ptr cinfo)
{
struct jpeg_source_mgr *src = cinfo->src;
fz_dctd *state = cinfo->client_data;
fz_stream *chain = state->chain;
chain->rp = chain->wp;
fz_fill_buffer(chain);
src->next_input_byte = chain->rp;
src->bytes_in_buffer = chain->wp - chain->rp;
if (src->bytes_in_buffer == 0)
{
static unsigned char eoi[2] = { 0xFF, JPEG_EOI };
fz_warn(chain->ctx, "premature end of file in jpeg");
src->next_input_byte = eoi;
src->bytes_in_buffer = 2;
}
return 1;
}