1 #pragma varargck argpos editerror 1 2 3 typedef struct Addr Addr; 4 typedef struct Address Address; 5 typedef struct Cmd Cmd; 6 typedef struct List List; 7 typedef struct String String; 8 9 struct String 10 { 11 int n; /* excludes NUL */ 12 Rune *r; /* includes NUL */ 13 int nalloc; 14 }; 15 16 struct Addr 17 { 18 char type; /* # (char addr), l (line addr), / ? . $ + - , ; */ 19 union{ 20 String *re; 21 Addr *left; /* left side of , and ; */ 22 }; 23 ulong num; 24 Addr *next; /* or right side of , and ; */ 25 }; 26 27 struct Address 28 { 29 Range r; 30 File *f; 31 }; 32 33 struct Cmd 34 { 35 Addr *addr; /* address (range of text) */ 36 String *re; /* regular expression for e.g. 'x' */ 37 union{ 38 Cmd *cmd; /* target of x, g, {, etc. */ 39 String *text; /* text of a, c, i; rhs of s */ 40 Addr *mtaddr; /* address for m, t */ 41 }; 42 Cmd *next; /* pointer to next element in {} */ 43 short num; 44 ushort flag; /* whatever */ 45 ushort cmdc; /* command character; 'x' etc. */ 46 }; 47 48 extern struct cmdtab{ 49 ushort cmdc; /* command character */ 50 uchar text; /* takes a textual argument? */ 51 uchar regexp; /* takes a regular expression? */ 52 uchar addr; /* takes an address (m or t)? */ 53 uchar defcmd; /* default command; 0==>none */ 54 uchar defaddr; /* default address */ 55 uchar count; /* takes a count e.g. s2/// */ 56 char *token; /* takes text terminated by one of these */ 57 int (*fn)(Text*, Cmd*); /* function to call with parse tree */ 58 }cmdtab[]; 59 60 #define INCR 25 /* delta when growing list */ 61 62 struct List 63 { 64 int nalloc; 65 int nused; 66 union{ 67 void *listptr; 68 void* *ptr; 69 uchar* *ucharptr; 70 String* *stringptr; 71 }; 72 }; 73 74 enum Defaddr{ /* default addresses */ 75 aNo, 76 aDot, 77 aAll, 78 }; 79 80 int nl_cmd(Text*, Cmd*), a_cmd(Text*, Cmd*), b_cmd(Text*, Cmd*); 81 int c_cmd(Text*, Cmd*), d_cmd(Text*, Cmd*); 82 int B_cmd(Text*, Cmd*), D_cmd(Text*, Cmd*), e_cmd(Text*, Cmd*); 83 int f_cmd(Text*, Cmd*), g_cmd(Text*, Cmd*), i_cmd(Text*, Cmd*); 84 int k_cmd(Text*, Cmd*), m_cmd(Text*, Cmd*), n_cmd(Text*, Cmd*); 85 int p_cmd(Text*, Cmd*); 86 int s_cmd(Text*, Cmd*), u_cmd(Text*, Cmd*), w_cmd(Text*, Cmd*); 87 int x_cmd(Text*, Cmd*), X_cmd(Text*, Cmd*), pipe_cmd(Text*, Cmd*); 88 int eq_cmd(Text*, Cmd*); 89 90 String *allocstring(int); 91 void freestring(String*); 92 String *getregexp(int); 93 Addr *newaddr(void); 94 Address cmdaddress(Addr*, Address, int); 95 int cmdexec(Text*, Cmd*); 96 void editerror(char*, ...); 97 int cmdlookup(int); 98 void resetxec(void); 99 void Straddc(String*, int); 100