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/*
* Creation and destruction.
*/
#include "fitz.h"
static fz_stream *
newstm(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_error fz_openrfile(fz_stream **stmp, char *path)
{
fz_stream *stm;
stm = newstm(FZ_SFILE);
stm->buffer = fz_newbuffer(FZ_BUFSIZE);
stm->file = open(path, O_BINARY | O_RDONLY, 0666);
if (stm->file < 0)
{
fz_dropbuffer(stm->buffer);
fz_free(stm);
return fz_throw("syserr: open '%s': %s", path, strerror(errno));
}
*stmp = stm;
return fz_okay;
}
fz_stream * fz_openrfilter(fz_filter *flt, fz_stream *src)
{
fz_stream *stm;
stm = newstm(FZ_SFILTER);
stm->buffer = fz_newbuffer(FZ_BUFSIZE);
stm->chain = fz_keepstream(src);
stm->filter = fz_keepfilter(flt);
return stm;
}
fz_stream * fz_openrbuffer(fz_buffer *buf)
{
fz_stream *stm;
stm = newstm(FZ_SBUFFER);
stm->buffer = fz_keepbuffer(buf);
stm->buffer->eof = 1;
return stm;
}
fz_stream * fz_openrmemory(unsigned char *mem, int len)
{
fz_buffer *buf;
fz_stream *stm;
buf = fz_newbufferwithmemory(mem, len);
stm = fz_openrbuffer(buf);
fz_dropbuffer(buf);
return stm;
}
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