From 6ddde92a3a45e970b05770633dc6a337d5d013c5 Mon Sep 17 00:00:00 2001 From: Tor Andersson Date: Mon, 27 Sep 2004 02:15:04 +0200 Subject: Initial import --- filter/null.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 filter/null.c (limited to 'filter/null.c') diff --git a/filter/null.c b/filter/null.c new file mode 100644 index 00000000..a4af03b1 --- /dev/null +++ b/filter/null.c @@ -0,0 +1,51 @@ +#include + +typedef struct fz_nullfilter_s fz_nullfilter; + +struct fz_nullfilter_s +{ + fz_filter super; + int len; + int cur; +}; + +fz_error * +fz_newnullfilter(fz_filter **fp, int len) +{ + FZ_NEWFILTER(fz_nullfilter, f, nullfilter); + f->len = len; + f->cur = 0; + return nil; +} + +void +fz_freenullfilter(fz_filter *f) +{ + fz_free(f); +} + +fz_error * +fz_processnullfilter(fz_filter *filter, fz_buffer *in, fz_buffer *out) +{ + fz_nullfilter *f = (fz_nullfilter*)filter; + int n; + + n = MIN(MIN(in->wp - in->rp, out->ep - out->wp), f->len - f->cur); + + if (n) { + memcpy(out->wp, in->rp, n); + in->rp += n; + out->wp += n; + f->cur += n; + } + + if (f->cur == f->len) + return fz_iodone; + if (in->rp == in->wp) + return fz_ioneedin; + if (out->wp == out->ep) + return fz_ioneedout; + + return fz_throw("braindead programmer in nullfilter"); +} + -- cgit v1.2.3