edit.h (view raw)
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/*#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 ; */
} u;
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 */
} u;
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 /* code depends on a long being able to hold a pointer */
{
int nalloc;
int nused;
union{
void *listptr;
void* *ptr;
uchar* *ucharptr;
String* *stringptr;
} u;
};
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);
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