char *metaTagVal(struct meta *meta, char *name)
/* Return value of tag found in this node or if its not there in parents.
* Returns NULL if tag not found. */
{
struct meta *m;
for (m = meta; m != NULL; m = m->parent)
{
char *val = metaLocalTagVal(m, name);
if (val != NULL)
return val;
}
return NULL;
}
struct meta *metaFindFirstMatch(struct meta *metaList, char *tag, char *val)
/* Find first meta on list (including children) that has tag matching val */
{
struct meta *meta;
for (meta = metaList; meta != NULL; meta = meta->next)
{
/* Do depth first search so low level tags override higher. */
if (meta->children)
{
struct meta *match = metaFindFirstMatch(meta->children, tag, val);
if (match != NULL)
return match;
}
char *ourVal = metaLocalTagVal(meta, tag);
if (ourVal != NULL && sameString(ourVal, val))
return meta;
}
return NULL;
}
char *allSameVal(char *tag, struct meta *metaList)
/* Return value of tag if it exists and is the same in each meta on list */
{
char *val = NULL;
struct meta *meta;
for (meta = metaList; meta != NULL; meta = meta->next)
{
char *oneVal = metaLocalTagVal(meta, tag);
if (oneVal == NULL)
return NULL;
if (val == NULL)
val = oneVal;
else
{
if (!sameString(oneVal, val))
return NULL;
}
}
return val;
}
