Tryna subst vars

1 files changed, 54 insertions, 7 deletions

diff --git a/src/ft_u_utils.c b/src/ft_u_utils.c
index cd9e53f..594f2c8 100644
--- a/src/ft_u_utils.c
+++ b/src/ft_u_utils.c
@@ -14,8 +14,24 @@
 #include <stdlib.h>
 #include <stdint.h>
 
+#include "ft_f_fail.h"
+#include "ft_s_destroy.h"
+#include "ft_s_lcom.h"
 #include "ft_s_struct.h"
 
+uint64_t
+	ft_get_argc(const char *args[])
+{
+	uint64_t	argc;
+
+	argc = 0;
+	while (args[argc])
+	{
+		argc++;
+	}
+	return (argc);
+}
+
 char
 	*ft_get_home_dir(char **envp)
 {
@@ -35,15 +51,46 @@ char
 	return (NULL);
 }
 
-uint64_t
-	ft_get_argc(const char *args[])
+/*
+** char *
+** ft_subst_var_value(const char varname[], const t_msh *msh);
+**
+** DESCRIPTION
+** The ft_subst_var_value() function returns
+** a heap-allocated, null-terminated string
+** that may later be free'd containing the
+** value of the variable varname[] including
+** the '$' prefix. NULL is returned if varname[]
+** wasn't found.
+*/
+
+char
+	*ft_subst_var_value(const char varname[],
+						t_msh *msh)
 {
-	uint64_t	argc;
+	char	**p_env;
+	char	*varval;
 
-	argc = 0;
-	while (args[argc])
+	p_env = msh->envp;
+	varval = NULL;
+	while (*p_env)
 	{
-		argc++;
+		if (!ft_strncmp(*p_env, varname + 1, ft_strlen(varname + 1) + 1))
+		{
+			ft_printf("(%s)\n", *p_env);
+			while (**p_env != '\0' && **p_env != '=')
+				**p_env += 1;
+			if (**p_env == '=')
+				**p_env += 1;
+			if (!(varval = ft_strdup(*p_env)))
+			{
+				ft_lcom_clear(&msh->curr);
+				ft_s_destroy(msh);
+				ft_fail_alloc(msh);
+			}
+			return (varval);
+		}
+		p_env += 1;
 	}
-	return (argc);
+	return (NULL);
 }