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96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
/**
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* @file variable.c
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* Defines variable data structure, and provides functions for variable
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* creation.
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*
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* Copyright (C) 2018 Clyne Sullivan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "variable.h"
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#include "string.h"
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#include <ctype.h>
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#include <stdlib.h>
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variable *make_varf(variable *v, float f)
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{
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if (v == 0) {
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v = (variable *)malloc(sizeof(variable));
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v->tmp = 1;
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}
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v->type = NUMBER;
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v->value.f = f;
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return v;
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}
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variable *make_vars(variable *v, const char *s)
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{
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if (v == 0) {
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v = (variable *)malloc(sizeof(variable));
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v->tmp = 1;
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}
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v->type = STRING;
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v->value.p = (uint32_t)strclone(s);
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return v;
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}
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variable *varclone(variable *n)
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{
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variable *v = (variable *)malloc(sizeof(variable));
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v->tmp = 1;
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v->type = n->type;
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if (n->type == STRING)
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v->value.p = (uint32_t)strclone((char *)n->value.p);
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else
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v->value.p = n->value.p;
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return v;
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}
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variable *make_num(const char *text)
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{
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int decimal = -1;
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char valid = 0;
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int i = 0;
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if (text[0] == '-')
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i++;
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do {
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if (text[i] == '.') {
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if (decimal >= 0) {
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valid = 0;
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break;
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}
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decimal = i;
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} else if (isdigit(text[i])) {
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valid |= 1;
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} else {
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break;
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}
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} while (text[++i] != '\0');
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if (valid == 0)
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return 0;
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char *buf = (char *)malloc(i + 1);
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strncpy(buf, text, i);
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buf[i] = '\0';
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variable *v = make_varf(0, strtof(buf, 0));
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free(buf);
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return v;
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}
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