92 lines
2.6 KiB
C
92 lines
2.6 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 to_number.c
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* @brief Implements the OP_TO_NUMBER opcode for converting values to integers in the VM.
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*
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* This file handles the OP_TO_NUMBER instruction, which converts a value to an integer.
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* The value is popped from the stack, and the result is pushed back.
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*
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* Behavior:
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* - Pops the value from the stack.
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* - Converts the value to an integer.
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* - Pushes the result onto the stack.
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*
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* Error Handling:
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* - Exits with an error if the conversion fails.
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*
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* Example:
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* - Bytecode: OP_TO_NUMBER
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* - Stack before: ["42"]
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* - Stack after: [42]
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*/
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case OP_TO_NUMBER: {
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Value v = pop_value(vm);
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if (v.type == VAL_INT) {
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push_value(vm, make_int(v.i));
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free_value(v);
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} else if (v.type == VAL_FLOAT) {
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double d = v.d;
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if (d >= (double)INT64_MIN && d <= (double)INT64_MAX) {
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int64_t ii = (int64_t)d;
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if ((double)ii == d) {
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push_value(vm, make_int(ii));
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} else {
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push_value(vm, make_float(d));
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}
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} else {
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push_value(vm, make_float(d));
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}
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free_value(v);
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} else if (v.type == VAL_STRING) {
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const char *s = v.s ? v.s : "";
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const char *p = s;
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while (*p == ' ' || *p == '\t' || *p == '\r' || *p == '\n')
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p++;
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char *endp = NULL;
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/* Try float first to support decimals and scientific notation */
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double dval = strtod(p, &endp);
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while (endp && (*endp == ' ' || *endp == '\t' || *endp == '\r' || *endp == '\n'))
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endp++;
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if (!endp || *endp != '\0') {
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/* Fallback to integer-only parse */
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endp = NULL;
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long long parsed = strtoll(p, &endp, 10);
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while (endp && (*endp == ' ' || *endp == '\t' || *endp == '\r' || *endp == '\n'))
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endp++;
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if (endp && *endp == '\0') {
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push_value(vm, make_int((int64_t)parsed));
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} else {
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push_value(vm, make_int(0));
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}
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} else {
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/* Preserve int when exact; else float */
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if (dval >= (double)INT64_MIN && dval <= (double)INT64_MAX) {
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int64_t ii = (int64_t)dval;
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if ((double)ii == dval) {
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push_value(vm, make_int(ii));
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} else {
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push_value(vm, make_float(dval));
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}
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} else {
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push_value(vm, make_float(dval));
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}
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}
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free_value(v);
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} else if (v.type == VAL_BOOL) {
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push_value(vm, make_int(v.i ? 1 : 0));
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free_value(v);
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} else {
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free_value(v);
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push_value(vm, make_int(0));
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}
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break;
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}
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