Function proj_context_get_database_metadata

src/iso19111/c_api.cpp:444–465

\brief Return a metadata from the database. * * The returned pointer remains valid while ctx is valid, and until * proj_context_get_database_metadata() is called. * * Available keys: * * - DATABASE.LAYOUT.VERSION.MAJOR * - DATABASE.LAYOUT.VERSION.MINOR * - EPSG.VERSION * - EPSG.DATE * - ESRI.VERSION * - ESRI.DATE * - IGNF.SOURCE * - IGNF.VERSION * - IGNF.DATE * - NKG.SOURCE * - NK

 * @return value, or nullptr
 */
const char *proj_context_get_database_metadata(PJ_CONTEXT *ctx,
                                               const char *key) {
    SANITIZE_CTX(ctx);
    if (!key) {
        proj_context_errno_set(ctx, PROJ_ERR_OTHER_API_MISUSE);
        proj_log_error(ctx, __FUNCTION__, "missing required input");
        return nullptr;
    }
    try {
        // temporary variable must be used as getDBcontext() might create
        // ctx->cpp_context
        auto osVal(getDBcontext(ctx)->getMetadata(key));
        if (osVal == nullptr) {
            return nullptr;
        }
        ctx->get_cpp_context()->lastDbMetadataItem_ = osVal;
        return ctx->cpp_context->lastDbMetadataItem_.c_str();
    } catch (const std::exception &e) {
        proj_log_error(ctx, __FUNCTION__, e.what());
        return nullptr;
    }
}

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