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Implement conditions on tag

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A condition is formed by:
    <tag> <op> <value>

<tag> is the normal yambar tag. <op> is one of '==', '!=', '<', '<=', '>', or
'>='. <value> is what you wish to compare it to.

'boolean' tags must be used directly. They falsehood is matched with '~':

    <tag>
    ~<tag>

Finally, to match an empty string, one must use ' "" ':
    <tag> <op> ""
This commit is contained in:
Leonardo Gibrowski Faé 2022-04-10 00:10:07 -03:00
parent 4496d82cfb
commit 2b103b7acd
11 changed files with 416 additions and 75 deletions
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28
tag.c
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@ -32,6 +32,30 @@ tag_name(const struct tag *tag)
return priv->name;
}
static enum tag_type
bool_type(const struct tag *tag)
{
return TAG_TYPE_BOOL;
}
static enum tag_type
int_type(const struct tag *tag)
{
return TAG_TYPE_INT;
}
static enum tag_type
float_type(const struct tag *tag)
{
return TAG_TYPE_FLOAT;
}
static enum tag_type
string_type(const struct tag *tag)
{
return TAG_TYPE_STRING;
}
static long
unimpl_min_max(const struct tag *tag)
{
@ -264,6 +288,7 @@ tag_new_int_realtime(struct module *owner, const char *name, long value,
tag->owner = owner;
tag->destroy = &destroy_int_and_float;
tag->name = &tag_name;
tag->type = &int_type;
tag->min = &int_min;
tag->max = &int_max;
tag->realtime = &int_realtime;
@ -287,6 +312,7 @@ tag_new_bool(struct module *owner, const char *name, bool value)
tag->owner = owner;
tag->destroy = &destroy_int_and_float;
tag->name = &tag_name;
tag->type = &bool_type;
tag->min = &unimpl_min_max;
tag->max = &unimpl_min_max;
tag->realtime = &no_realtime;
@ -310,6 +336,7 @@ tag_new_float(struct module *owner, const char *name, double value)
tag->owner = owner;
tag->destroy = &destroy_int_and_float;
tag->name = &tag_name;
tag->type = &float_type;
tag->min = &unimpl_min_max;
tag->max = &unimpl_min_max;
tag->realtime = &no_realtime;
@ -333,6 +360,7 @@ tag_new_string(struct module *owner, const char *name, const char *value)
tag->owner = owner;
tag->destroy = &destroy_string;
tag->name = &tag_name;
tag->type = &string_type;
tag->min = &unimpl_min_max;
tag->max = &unimpl_min_max;
tag->realtime = &no_realtime;