Subversion Repositories planix.SVN

typedef struct Addr Addr;
typedef struct Cmd Cmd;
struct Addr
{
        char    type;   /* # (char addr), l (line addr), / ? . $ + - , ; */
        union{
                String  *re;
                Addr    *aleft;         /* left side of , and ; */
        } g;
        Posn    num;
        Addr    *next;                  /* or right side of , and ; */
};

#define are     g.re
#define left    g.aleft

struct Cmd
{
        Addr    *addr;                  /* address (range of text) */
        String  *re;                    /* regular expression for e.g. 'x' */
        union{
                Cmd     *cmd;           /* target of x, g, {, etc. */
                String  *text;          /* text of a, c, i; rhs of s */
                Addr    *addr;          /* address for m, t */
        } g;
        Cmd     *next;                  /* pointer to next element in {} */
        short   num;
        ushort  flag;                   /* whatever */
        ushort  cmdc;                   /* command character; 'x' etc. */
};

#define ccmd    g.cmd
#define ctext   g.text
#define caddr   g.addr

typedef struct Cmdtab Cmdtab;
struct Cmdtab
{
        ushort  cmdc;           /* command character */
        uchar   text;           /* takes a textual argument? */
        uchar   regexp;         /* takes a regular expression? */
        uchar   addr;           /* takes an address (m or t)? */
        uchar   defcmd;         /* default command; 0==>none */
        uchar   defaddr;        /* default address */
        uchar   count;          /* takes a count e.g. s2/// */
        char    *token;         /* takes text terminated by one of these */
        int     (*fn)(File*, Cmd*);     /* function to call with parse tree */
}cmdtab[];

enum Defaddr{   /* default addresses */
        aNo,
        aDot,
        aAll,
};

int     nl_cmd(File*, Cmd*), a_cmd(File*, Cmd*), b_cmd(File*, Cmd*);
int     c_cmd(File*, Cmd*), cd_cmd(File*, Cmd*), d_cmd(File*, Cmd*);
int     D_cmd(File*, Cmd*), e_cmd(File*, Cmd*);
int     f_cmd(File*, Cmd*), g_cmd(File*, Cmd*), i_cmd(File*, Cmd*);
int     k_cmd(File*, Cmd*), m_cmd(File*, Cmd*), n_cmd(File*, Cmd*);
int     p_cmd(File*, Cmd*), q_cmd(File*, Cmd*);
int     s_cmd(File*, Cmd*), u_cmd(File*, Cmd*), w_cmd(File*, Cmd*);
int     x_cmd(File*, Cmd*), X_cmd(File*, Cmd*), plan9_cmd(File*, Cmd*);
int     eq_cmd(File*, Cmd*);


String  *getregexp(int);
Addr    *newaddr(void);
Address address(Addr*, Address, int);
int     cmdexec(File*, Cmd*);