89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
// 17 may 2015
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#include "ui.h"
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#include "uipriv.h"
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struct typeinfo {
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const char *name;
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uintmax_t parent;
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size_t size;
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};
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static struct ptrArray *types = NULL;
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uintmax_t uiRegisterType(const char *name, uintmax_t parent, size_t size)
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{
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struct typeinfo *ti;
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if (types == NULL) {
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types = newPtrArray();
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// reserve ID 0
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ptrArrayAppend(types, NULL);
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}
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// TODO prevent our size from being smaller than our parent's
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ti = uiNew(struct typeinfo);
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ti->name = name;
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ti->parent = parent;
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ti->size = size;
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ptrArrayAppend(types, ti);
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return types->len - 1;
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}
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void *uiIsA(void *p, uintmax_t id, int fail)
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{
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uiTyped *t;
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struct typeinfo *ti, *ti2;
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uintmax_t compareTo;
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if (id == 0 || id >= types->len)
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complain("invalid type ID given to uiIsA()");
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t = (uiTyped *) p;
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compareTo = t->Type;
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if (compareTo == 0)
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complain("object %p has no type in uiIsA()", t);
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for (;;) {
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if (compareTo >= types->len)
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complain("invalid type ID in uiIsA()", t);
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if (compareTo == id)
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return t;
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ti = ptrArrayIndex(types, struct typeinfo *, compareTo);
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if (ti->parent == 0)
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break;
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compareTo = ti->parent;
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}
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if (fail) {
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ti = ptrArrayIndex(types, struct typeinfo *, id);
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ti2 = ptrArrayIndex(types, struct typeinfo *, t->Type);
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complain("object %p not a %s in uiIsA() (is a %s)", t, ti->name, ti2->name);
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}
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return NULL;
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}
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void uninitTypes(void)
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{
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struct typeinfo *ti;
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if (types == NULL) // never initialized; do nothing
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return;
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// the first entry is NULL; get rid of it directly
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ptrArrayDelete(types, 0);
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while (types->len != 0) {
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ti = ptrArrayIndex(types, struct typeinfo *, 0);
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ptrArrayDelete(types, 0);
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uiFree(ti);
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}
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ptrArrayDestroy(types);
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}
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uiTyped *newTyped(uintmax_t type)
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{
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struct typeinfo *ti;
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uiTyped *instance;
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if (type == 0 || type >= types->len)
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complain("invalid type ID given to newTyped()");
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ti = ptrArrayIndex(types, struct typeinfo *, type);
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instance = (uiTyped *) uiAlloc(ti->size, ti->name);
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instance->Type = type;
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return instance;
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}
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