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generic.c file split

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LuckyLaszlo
2021-12-16 04:01:29 +01:00
parent f53969cd45
commit 20c71bccbb
9 changed files with 322 additions and 251 deletions
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70
srcs/generic/ft_getenv.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_getenv.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/10/08 09:25:35 by lperrey #+# #+# */
/* Updated: 2021/12/16 03:44:06 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
/*
** Search for an environement variable,
** and return a pointer to the first character after "env_var=" .
** Return NULL if env_var not found.
*/
char *ft_getenv(char *env_var)
{
int i;
char *tmp;
size_t env_var_len;
env_var_len = ft_strlen(env_var);
i = 0;
tmp = NULL;
while (!tmp && environ[i])
{
if (environ[i][env_var_len] == '=')
{
if (ft_strncmp(environ[i], env_var, env_var_len) == 0)
tmp = &environ[i][env_var_len + 1];
else
i++;
}
else
i++;
}
return (tmp);
}
/*
** Like ft_getenv(), but return position of env_var instead of value.
** If env_var not found, return last position of **environ (== NULL)
*/
size_t ft_getenv_position(char *env_var)
{
int i;
int found;
size_t env_var_len;
env_var_len = ft_strlen(env_var);
i = 0;
found = 0;
while (!found && environ[i])
{
if (environ[i][env_var_len] == '=')
{
if (ft_strncmp(environ[i], env_var, env_var_len) == 0)
found = 1;
else
i++;
}
else
i++;
}
return (i);
}