55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*/
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/**
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* @file make_array.c
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* @brief Implements the OP_MAKE_ARRAY opcode for creating arrays in the VM.
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*
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* This file handles the OP_MAKE_ARRAY instruction, which pops `n` values from the stack,
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* creates an array from them, and pushes the resulting array back onto the stack.
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*
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* Behavior:
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* - Validates the number of elements (`n`) to ensure it is non-negative and within stack bounds.
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* - Allocates temporary storage for the array elements.
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* - Constructs the array using `make_array_from_values`.
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* - Frees temporary storage and pushes the array onto the stack.
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*
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* Error Handling:
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* - Exits with an error if `n` is invalid or if memory allocation fails.
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*
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* Example:
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* - Bytecode: OP_MAKE_ARRAY 3
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* - Stack before: [1, 2, 3]
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* - Stack after: [[1, 2, 3]]
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*/
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case OP_MAKE_ARRAY: {
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int n = inst.operand;
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if (n < 0 || vm->sp + 1 < n) {
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fprintf(stderr, "Runtime error: invalid element count for MAKE_ARRAY\n");
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exit(1);
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}
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/* pop n values into temp array preserving original order */
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Value *vals = (Value *)malloc(sizeof(Value) * n);
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if (!vals) {
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fprintf(stderr, "Runtime error: OOM in MAKE_ARRAY\n");
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exit(1);
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}
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for (int i = n - 1; i >= 0; --i) {
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vals[i] = pop_value(vm); /* take ownership */
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}
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/* build array by copying values, then free originals */
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Value arr = make_array_from_values(vals, n);
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for (int i = 0; i < n; ++i) {
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free_value(vals[i]);
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}
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free(vals);
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push_value(vm, arr);
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break;
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}
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