diff options
Diffstat (limited to 'src/cmd/sam/parse.h')
-rw-r--r-- | src/cmd/sam/parse.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/cmd/sam/parse.h b/src/cmd/sam/parse.h new file mode 100644 index 00000000..12f293f2 --- /dev/null +++ b/src/cmd/sam/parse.h @@ -0,0 +1,68 @@ +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 + +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)(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*); |