121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* parsing.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2021/10/24 10:52:40 by lperrey #+# #+# */
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/* Updated: 2021/12/16 14:50:16 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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void save_redirections_words(t_token *t);
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t_cmd **parsing(t_token *token_list)
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{
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t_cmd **pipeline;
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if (!valid_syntax(token_list))
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return (NULL);
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// 2.9.1 - 1) Save Words
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save_redirections_words(token_list);
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// Struct CMD alloc
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pipeline = pipeline_alloc(1 + count_pipes(token_list));
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if (!pipeline)
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return (NULL);
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// 2.9.1 - 2) Expansion
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if (!expansions(token_list, pipeline))
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return (ft_retp_free(NULL, &pipeline, (t_free_f)free_pipeline));
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// 2.9.1 - 3) Redirection
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if (!redirections(token_list, pipeline))
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return (ft_retp_free(NULL, &pipeline, (t_free_f)free_pipeline));
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// Struct CMD fill
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if (!pipeline_fill_argv(token_list, pipeline))
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return (ft_retp_free(NULL, &pipeline, (t_free_f)free_pipeline));
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return (pipeline);
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}
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void save_redirections_words(t_token *t)
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{
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while (t)
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{
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if (t->id == '>' || t->id == T_DGREAT
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|| t->id == '<' || t->id == T_DLESS)
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{
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t = t->next;
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t->id = T_REDIRECTION_WORD;
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}
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t = t->next;
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}
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}
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/*
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2.9.1 Simple Commands
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2.9.1 - 1) Save Words
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2.9.1 - 2) Expansion
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2.9.1 - 3) Redirection
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https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
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#tag_18_09_01
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*/
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/*
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2.10 Shell Grammar
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https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
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#tag_18_10
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*/
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/* -------------------------------------------------------
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The grammar symbols
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------------------------------------------------------- */
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/*
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%token WORD
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%token LESS // '<'
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%token GREAT // '>'
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%token DLESS // '<<'
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%token DGREAT // '>>'
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%token PIPE // '|'
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*/
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/* -------------------------------------------------------
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The Simplified Grammar
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------------------------------------------------------- */
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/*
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%start program
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%%
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pipeline : command
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| pipeline '|' command
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;
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command : cmd_prefix cmd_name cmd_suffix
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| cmd_prefix cmd_name
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| cmd_name cmd_suffix
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| cmd_name
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;
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cmd_name : WORD // Apply rule 7a
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;
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cmd_prefix : io_redirect
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| cmd_prefix io_redirect
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;
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cmd_suffix : io_redirect
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| cmd_suffix io_redirect
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| WORD
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| cmd_suffix WORD
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;
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io_redirect : io_file
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| io_here
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;
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io_file : '<' filename
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| '>' filename
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| DGREAT filename
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;
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filename : WORD // Apply rule 2
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;
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io_here : DLESS here_end
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;
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here_end : WORD // Apply rule 3
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;
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*/
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