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purge unused measurement instances

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Instances of measurements referencing vectors not instantiated were
only partially initialized (because only inst_meas_hint was called
on them but never inst_meas) but still left in the list of instances.

They were thus displayed, producing confusing results.

We now trace a measurement instance's validity and remove all invalid
instances at the end of instantiate_meas.
This commit is contained in:
Werner Almesberger 2012-03-17 23:14:16 -03:00
parent 5130707371
commit 43928dbbf3
3 changed files with 26 additions and 6 deletions
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6
inst.c
View File

@ -1,8 +1,8 @@
/*
* inst.c - Instance structures
*
* Written 2009-2011 by Werner Almesberger
* Copyright 2009-2011 by Werner Almesberger
* Written 2009-2012 by Werner Almesberger
* Copyright 2009-2012 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -1051,6 +1051,7 @@ int inst_meas(struct obj *obj, struct coord from, struct coord to)
assert(inst);
inst->base = from;
inst->u.meas.end = to;
inst->u.meas.valid = 1;
/* @@@ we still need to consider the text size as well */
update_bbox(&inst->bbox, from);
update_bbox(&inst->bbox, to);
@ -1073,6 +1074,7 @@ void inst_meas_hint(struct obj *obj, unit_type offset)
inst = add_inst(&meas_ops, ip_meas, zero);
inst->obj = obj;
inst->u.meas.offset = offset;
inst->u.meas.valid = 0;
inst->active = 1; /* measurements are always active */
}

5
inst.h
View File

@ -1,8 +1,8 @@
/*
* inst.h - Instance structures
*
* Written 2009, 2010 by Werner Almesberger
* Copyright 2009, 2010 by Werner Almesberger
* Written 2009, 2010, 2012 by Werner Almesberger
* Copyright 2009, 2010, 2012 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -113,6 +113,7 @@ struct inst {
struct {
struct coord end;
double offset;
int valid; /* only set if references exist */
} meas;
} u;
struct inst *next;

21
meas.c
View File

@ -1,8 +1,8 @@
/*
* meas.c - Measurements
*
* Written 2009, 2010 by Werner Almesberger
* Copyright 2009, 2010 by Werner Almesberger
* Written 2009, 2010, 2012 by Werner Almesberger
* Copyright 2009, 2010, 2012 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -294,6 +294,22 @@ static int instantiate_meas_pkg(int n_frames)
}
static void purge_meas(struct pkg *pkg)
{
struct inst **anchor, *inst;
anchor = pkg->insts+ip_meas;
while (*anchor)
if ((*anchor)->u.meas.valid) {
anchor = &(*anchor)->next;
} else {
inst = *anchor;
*anchor = inst->next;
free(inst);
}
}
int instantiate_meas(int n_frames)
{
struct pkg *pkg;
@ -304,6 +320,7 @@ int instantiate_meas(int n_frames)
inst_select_pkg(pkg->name);
if (!instantiate_meas_pkg(n_frames))
return 0;
purge_meas(pkg);
}
return 1;
}