77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* exec_math.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: ariard <ariard@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/03/07 10:58:49 by ariard #+# #+# */
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/* Updated: 2017/03/07 13:42:11 by ariard ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "exec.h"
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static int get_math(char *stream, char **var, char **value, char **operator)
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{
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char *temp;
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*var = ft_strduptr(stream, &ft_isalpha);
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temp = ft_sstrstr(data_singleton()->env, *var);
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if (temp)
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{
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temp += ft_strlenchr(temp, '=') + 1;
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*value = ft_strdup(temp);
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if (!(ft_stris(*value, &ft_isdigit)))
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{
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ft_strdel(value);
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*value = ft_itoa(0);
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}
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}
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else
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*value = ft_itoa(0);
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stream += ft_strlen(*var);
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*operator = ft_strdup(stream);
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return (0);
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}
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static int do_math(char **value, char *operator)
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{
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long ope1;
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long ope2;
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ope1 = ft_atoi(*value);
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if (operator[2])
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ope2 = ft_atoi(&operator[2]);
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else
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ope2 = 0;
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if (operator[0] == '/' && ope2 == 0)
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ope1 = 0;
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else
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{
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ope1 = (operator[0] == '+') ? ope1 + ope2 : ope1;
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ope1 = (operator[0] == '-') ? ope1 - ope2 : ope1;
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ope1 = (operator[0] == '/') ? ope1 / ope2 : ope1;
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ope1 = (operator[0] == '*') ? ope1 * ope2 : ope1;
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ope1 = (operator[0] == '%') ? ope1 % ope2 : ope1;
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}
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ft_strdel(value);
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*value = ft_itoa(ope1);
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return (0);
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}
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int exec_math(t_btree **ast)
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{
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t_astnode *node;
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char **av;
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char *var;
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char *value;
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char *operator;
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node = (*ast)->item;
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av = token_to_argv(node->data.cmd.wordlist, 1);
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get_math(av[0], &var, &value, &operator);
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do_math(&value, operator);
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builtin_setenv("setenv", (char *[]){var, value, 0}, data_singleton()->local_var);
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return (0);
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}
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