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#include "fitz.h"
static fz_stream *
fz_newstream(int kind)
{
fz_stream *stm;
stm = fz_malloc(sizeof(fz_stream));
stm->refs = 1;
stm->kind = kind;
stm->dead = 0;
stm->error = fz_okay;
stm->buffer = nil;
stm->chain = nil;
stm->filter = nil;
stm->file = -1;
return stm;
}
fz_stream *
fz_keepstream(fz_stream *stm)
{
stm->refs ++;
return stm;
}
void
fz_dropstream(fz_stream *stm)
{
stm->refs --;
if (stm->refs == 0)
{
if (stm->error)
{
fz_catch(stm->error, "dropped unhandled ioerror");
stm->error = fz_okay;
}
switch (stm->kind)
{
case FZ_SFILE:
close(stm->file);
break;
case FZ_SFILTER:
fz_dropfilter(stm->filter);
fz_dropstream(stm->chain);
break;
case FZ_SBUFFER:
break;
}
fz_dropbuffer(stm->buffer);
fz_free(stm);
}
}
fz_stream *
fz_openfile(int fd)
{
fz_stream *stm;
stm = fz_newstream(FZ_SFILE);
stm->buffer = fz_newbuffer(FZ_BUFSIZE);
stm->file = fd;
return stm;
}
fz_stream *
fz_openfilter(fz_filter *flt, fz_stream *src)
{
fz_stream *stm;
stm = fz_newstream(FZ_SFILTER);
stm->buffer = fz_newbuffer(FZ_BUFSIZE);
stm->chain = fz_keepstream(src);
stm->filter = fz_keepfilter(flt);
return stm;
}
fz_stream *
fz_openbuffer(fz_buffer *buf)
{
fz_stream *stm;
stm = fz_newstream(FZ_SBUFFER);
stm->buffer = fz_keepbuffer(buf);
stm->buffer->eof = 1;
return stm;
}
fz_stream *
fz_openmemory(unsigned char *mem, int len)
{
fz_buffer *buf;
fz_stream *stm;
buf = fz_newbufferwithmemory(mem, len);
stm = fz_openbuffer(buf);
fz_dropbuffer(buf);
return stm;
}
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