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https://github.com/wren-lang/wren.git
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6f37d379f4
- wrenEnsureSlots() Lets you go the foreign slot stack to make room for a temporary work area. - wrenSetSlotNewList() Creates a new empty list and stores it in a slot. - wrenInsertInList() Takes a value from one slot and inserts it into the list in another. Still need more functions like getting elements from a list, removing, etc. but this at least lets you create, populate, and return lists from foreign methods.
47 lines
973 B
C
47 lines
973 B
C
#include <string.h>
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#include "lists.h"
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static void newList(WrenVM* vm)
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{
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wrenSetSlotNewList(vm, 0);
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}
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// Helper function to store a double in a slot then insert it into the list at
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// slot zero.
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static void insertNumber(WrenVM* vm, int index, double value)
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{
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wrenSetSlotDouble(vm, 1, value);
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wrenInsertInList(vm, 0, index, 1);
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}
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static void insert(WrenVM* vm)
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{
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wrenSetSlotNewList(vm, 0);
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wrenEnsureSlots(vm, 2);
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// Appending.
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insertNumber(vm, 0, 1.0);
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insertNumber(vm, 1, 2.0);
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insertNumber(vm, 2, 3.0);
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// Inserting.
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insertNumber(vm, 0, 4.0);
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insertNumber(vm, 1, 5.0);
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insertNumber(vm, 2, 6.0);
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// Negative indexes.
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insertNumber(vm, -1, 7.0);
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insertNumber(vm, -2, 8.0);
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insertNumber(vm, -3, 9.0);
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}
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WrenForeignMethodFn listsBindMethod(const char* signature)
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{
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if (strcmp(signature, "static Lists.newList()") == 0) return newList;
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if (strcmp(signature, "static Lists.insert()") == 0) return insert;
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return NULL;
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}
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