SceneLink.cpp

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#include "scene/SceneLink.h"
 
#include <cstring>
#include <string>
#include <vector>
 
namespace eve::scene {
namespace {
 
struct Entry {
    std::string name;
    LinkOps ops;
};
 
std::vector<Entry>& table() {
    static std::vector<Entry> t;
    return t;
}
 
}  // namespace
 
int registerLinkKind(const LinkOps& ops) {
    if (!ops.kind || !ops.pushWorld) return -1;
    const int existing = findLinkKind(ops.kind);
    if (existing >= 0) return existing;
    table().push_back({ops.kind, ops});
    // Point the stored ops at our own copy of the name so a caller may pass a
    // temporary.
    Entry& e = table().back();
    e.ops.kind = e.name.c_str();
    return int(table().size()) - 1;
}
 
int findLinkKind(const char* kind) {
    if (!kind) return -1;
    const auto& t = table();
    for (size_t i = 0; i < t.size(); ++i)
        if (t[i].name == kind) return int(i);
    return -1;
}
 
const LinkOps* linkOps(int kindId) {
    const auto& t = table();
    if (kindId < 0 || size_t(kindId) >= t.size()) return nullptr;
    return &t[size_t(kindId)].ops;
}
 
const char* linkKindName(int kindId) {
    const LinkOps* ops = linkOps(kindId);
    return ops ? ops->kind : "";
}
 
}  // namespace eve::scene