parser_cmd.c File Reference

Command parsing: builds command nodes from argument tokens. More...

#include "parser.h"
#include "ast.h"
#include "libft.h"

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Detailed Description

Command parsing: builds command nodes from argument tokens.

Definition in file parser_cmd.c.

Functions
int	count_word_tokens (t_token *tokens)
	Count consecutive word token groups. More...
static int	fill_args_array (char **args, t_token **tokens, int count)
	Fill argument array from consecutive word tokens. More...
char **	collect_args (t_token **tokens, int *argc)
	Collect consecutive word tokens into an arguments array. More...
t_ast *	parse_simple_command (t_token **tokens)
	Parse a simple command from consecutive word tokens. More...

Function Documentation

count_word_tokens()

int count_word_tokens

(

t_token *

tokens

)

Count consecutive word token groups.

Connected tokens count as 1 group

Parameters

tokens

Token list starting position

Returns

Number of word groups

Definition at line 25 of file parser_cmd.c.

References t_token::connected, t_token::next, TOKEN_WORD, and t_token::type.

Referenced by collect_args().

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fill_args_array()

static int fill_args_array ( char **  args, t_token **  tokens, int  count  )

static

Fill argument array from consecutive word tokens.

Concatenates the connected tokens via ft_strjoin and advances the token pointer past all the consumed tokens

Parameters

args	Pre allocated array of size count + 1
tokens	Pointer to current token pointer
count	Number of word groups to collect

Returns

1 on success and 0 if failed midway (so that we can free what was partially allocated)

Definition at line 53 of file parser_cmd.c.

References t_token::next.

Referenced by collect_args().

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collect_args()

char** collect_args	(	t_token **	tokens,
		int *	argc
	)

Collect consecutive word tokens into an arguments array.

Parameters

tokens	Pointer to current token pointer
argc	Number of arguments collected

Returns

NULL terminated arguments array or NULL if none

Definition at line 88 of file parser_cmd.c.

References count_word_tokens(), and fill_args_array().

Referenced by collect_and_merge_remaining_args(), and parse_simple_command().

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parse_simple_command()

t_ast* parse_simple_command

(

t_token **

tokens

)

Parse a simple command from consecutive word tokens.

Collects the arguments via collect_args() and wraps them in a NODE_COMMAND AST node

Parameters

tokens

Pointer to current token pointer

Returns

NODE_COMMAND AST node or NULL if no words were found

Definition at line 117 of file parser_cmd.c.

References collect_args(), and create_cmd_node().

Referenced by parse_command().

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