43 lines
834 B
C
43 lines
834 B
C
#ifndef AST_BASE_H
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#define AST_BASE_H
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#include <stdlib.h>
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enum ast_type
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{
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AST_END,
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AST_LIST,
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AST_IF,
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AST_AND_OR,
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AST_REDIR,
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AST_VOID,
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AST_CMD
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};
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struct ast
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{
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enum ast_type type;
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/**
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* Data associated with this AST node. It can be one of the following:
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* - NULL (AST_END)
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* - struct ast_if* (AST_IF)
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* - struct ast_command* (AST_CMD)
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* - struct ast_and_or* (AST_AND_OR)
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* - struct ast_redir* (AST_REDIR)
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*/
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void *data;
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};
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/* @brief: returns an ast* with corresponding data and type.
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*
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* @note: this function should only be called by ast_create_[TYPE] functions.
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*/
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struct ast *ast_create(enum ast_type type, void *data);
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/* @brief: frees the given ast. If ast is NULL, does nothing.
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*
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*/
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void ast_free(struct ast **node);
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#endif /* ! AST_BASE_H */
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