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