Subversion Repositories planix.SVN

#pragma varargck        argpos  editerror       1

typedef struct Addr     Addr;
typedef struct Address  Address;
typedef struct Cmd      Cmd;
typedef struct List     List;
typedef struct String   String;

struct String
{
        int     n;              /* excludes NUL */
        Rune    *r;             /* includes NUL */
        int     nalloc;
};

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

struct Address
{
        Range   r;
        File    *f;
};

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    *mtaddr;                /* address for m, t */
        };
        Cmd     *next;                  /* pointer to next element in {} */
        short   num;
        ushort  flag;                   /* whatever */
        ushort  cmdc;                   /* command character; 'x' etc. */
};

extern 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)(Text*, Cmd*);     /* function to call with parse tree */
}cmdtab[];

#define INCR    25      /* delta when growing list */

struct List
{
        int     nalloc;
        int     nused;
        union{
                void    *listptr;
                void*   *ptr;
                uchar*  *ucharptr;
                String* *stringptr;
        };
};

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

int     nl_cmd(Text*, Cmd*), a_cmd(Text*, Cmd*), b_cmd(Text*, Cmd*);
int     c_cmd(Text*, Cmd*), d_cmd(Text*, Cmd*);
int     B_cmd(Text*, Cmd*), D_cmd(Text*, Cmd*), e_cmd(Text*, Cmd*);
int     f_cmd(Text*, Cmd*), g_cmd(Text*, Cmd*), i_cmd(Text*, Cmd*);
int     k_cmd(Text*, Cmd*), m_cmd(Text*, Cmd*), n_cmd(Text*, Cmd*);
int     p_cmd(Text*, Cmd*);
int     s_cmd(Text*, Cmd*), u_cmd(Text*, Cmd*), w_cmd(Text*, Cmd*);
int     x_cmd(Text*, Cmd*), X_cmd(Text*, Cmd*), pipe_cmd(Text*, Cmd*);
int     eq_cmd(Text*, Cmd*);

String  *allocstring(int);
void    freestring(String*);
String  *getregexp(int);
Addr    *newaddr(void);
Address cmdaddress(Addr*, Address, int);
int     cmdexec(Text*, Cmd*);
void    editerror(char*, ...);
int     cmdlookup(int);
void    resetxec(void);
void    Straddc(String*, int);