janet/core/func.c

/*
* Copyright (c) 2017 Calvin Rose
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/

#include <dst/dst.h>

/* If a frame has a closure environment, detach it from
 * the stack and have it keep its own values */
void dst_function_detach(DstFunction *func) {
    /* Check for closure environment */
    if (NULL != func->envs && NULL != func->envs[0]) {
        DstFuncEnv *env = func->envs[0];
        size_t s = sizeof(DstValue) * env->length;
        DstValue *vmem = malloc(s);
        if (NULL == vmem) {
            DST_OUT_OF_MEMORY;
        }
        memcpy(vmem, env->as.fiber->data + env->offset, s);
        env->offset = 0;
        env->as.values = vmem;
    }
}