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syntax analysis with simplified shell grammar

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+ TODO : bug to fix in lexer.c
This commit is contained in:
LuckyLaszlo
2021-10-24 19:58:19 +02:00
parent 906074d2cb
commit 815cedb8ca
11 changed files with 400 additions and 18 deletions
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95
srcs/parsing/valid_command.c Normal file
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@@ -0,0 +1,95 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* valid_command.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/10/24 18:52:05 by lperrey #+# #+# */
/* Updated: 2021/10/24 19:21:28 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
int valid_io_redirect(t_token **token_list);
static int valid_command_rule1(t_token **token_list);
static int valid_command_rule2(t_token **token_list);
static int valid_command_rule3(t_token **token_list);
static int valid_command_rule4(t_token **token_list);
int valid_command(t_token **token_list)
{
t_token *cmd_start;
cmd_start = *token_list;
if (valid_command_rule1(token_list))
return (1);
*token_list = cmd_start;
if (valid_command_rule2(token_list))
return (1);
*token_list = cmd_start;
if (valid_command_rule3(token_list))
return (1);
*token_list = cmd_start;
if (valid_command_rule4(token_list))
return (1);
return (0);
}
// cmd_prefix cmd_name cmd_suffix
static int valid_command_rule1(t_token **token_list)
{
while (valid_io_redirect(token_list))
{
if (valid_token(token_list, T_WORD))
{
while (valid_token(token_list, T_WORD)
|| valid_io_redirect(token_list))
{
if (valid_command_separator(*token_list))
return (1);
}
}
}
return (0);
}
// cmd_prefix cmd_name
static int valid_command_rule2(t_token **token_list)
{
while (valid_io_redirect(token_list))
{
if (valid_token(token_list, T_WORD))
{
if (valid_command_separator(*token_list))
return (1);
}
}
return (0);
}
// cmd_name cmd_suffix
static int valid_command_rule3(t_token **token_list)
{
if (valid_token(token_list, T_WORD))
{
while (valid_token(token_list, T_WORD) || valid_io_redirect(token_list))
{
if (valid_command_separator(*token_list))
return (1);
}
}
return (0);
}
// cmd_name
static int valid_command_rule4(t_token **token_list)
{
if (valid_token(token_list, T_WORD))
{
if (valid_command_separator(*token_list))
return (1);
}
return (0);
}