parse.h

#ifndef PARSE_H
#define PARSE_H

#define MAX_VAR_NUM 10
#define PIPE_MAX_NUM 10
#define free_and_null(x) free(x); (x) = NULL;
#define check_and_free(x) if ((x) != NULL) { free_and_null(x) }

typedef struct {
	char *command;
	char *VarList[MAX_VAR_NUM];
	int VarNum;
	char *inFile;
	char *outFile;
	int boolInfile;
	int boolOutfile;
} commandType;

/* parsing information structure */
typedef struct {
//	run process in background
	int boolBackground;
	commandType CommArray[PIPE_MAX_NUM];
	int pipeNum;
} parseInfo;

/* the function prototypes */
parseInfo *parse(char *);

void free_info(parseInfo *);

int parse_command(commandType *result, char *cmd, char **res_space, int space_delims);

char **split_string(char *cmdline, int *n_delims, char *delim);

void error_check(parseInfo *info, char **res_pipe, char **res_space, int type);

parseInfo *init_info(parseInfo *info);

#endif