Lexer structure

Core functionality of the lexer. More...

Data Structures
struct	s_lexer_state
	Structure used by lexer to efficiently have access to a bunch of variables. More...

Macros
#define	MAX_TOKENS_LEX   1024

Functions
char **	init_lexer_state (t_garbage *garbage, t_lexer_state *lex_st, const char *line)
	Initialize the lexer structure.
char **	lexer (t_garbage *garbage, const char *line)
	Create tokens (small chunks) a line with the quotes and operators.
t_command *	tokeniser (t_data *data, char **tokens)
	Creates a t_command structure that contains all the tokens Fills the command with the environment.
char *	ft_substr_end_gb (t_garbage *garbage, char const *src, unsigned int start, size_t end)
	Allocate memory for a string and copy the content from src.
int	is_operator_char (char c)
	Is |, < or >

Detailed Description

Core functionality of the lexer.

Functions to make a correct use of lexing and tokenisation.

Macro Definition Documentation

MAX_TOKENS_LEX

#define MAX_TOKENS_LEX   1024

Function Documentation

ft_substr_end_gb()

char * ft_substr_end_gb	(	t_garbage *	garbage,
		char const *	src,
		unsigned int	start,
		size_t	end )

Allocate memory for a string and copy the content from src.

Parameters

garbage	garbage structure
src	source string
start	start index to copy from
end	end index to copy to

Returns

char* pointer to the new string

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init_lexer_state()

char ** init_lexer_state	(	t_garbage *	garbage,
		t_lexer_state *	lex_st,
		const char *	line )

Initialize the lexer structure.

Fill the structure with zeros and init the line to search in and allocates the array to the garbage

Parameters

garbage	garbage structure
lex_st	pointer to the lexer structure
line	line to verify

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is_operator_char()

int is_operator_char

(

char

c

)

Is |, < or >

Parameters

c	character to check

Returns

int 1 if c is operator, 0 otherwise

lexer()

char ** lexer	(	t_garbage *	garbage,
		const char *	line )

Create tokens (small chunks) a line with the quotes and operators.

Handle spaces, quotes (' and ') and shell operator (|, <, <<, >, >>). Return an array of tokens (strings), NULL terminated.

Parameters

garbage	garbage structure
line	line to tokenise

Returns

Array of strings

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tokeniser()

t_command * tokeniser	(	t_data *	data,
		char **	tokens )

Creates a t_command structure that contains all the tokens Fills the command with the environment.

Parameters

data	data structure
tokens	tokens

Returns

t_command* pointer if OK, NULL if it fails

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