2 * Plan9 is defined for plan 9
3 * V9 is defined for 9th edition
4 * Sun is defined for sun-os
5 * Please don't litter the code with ifdefs. The three below (and one in
6 * getflags) should be enough.
23 #define YYMAXDEPTH 500
30 #undef pipe /* so that /dev/fd works */
32 typedef struct tree tree;
33 typedef struct word word;
35 typedef union code code;
36 typedef struct var var;
37 typedef struct list list;
38 typedef struct redir redir;
39 typedef struct thread thread;
40 typedef struct builtin builtin;
44 int rtype, fd0, fd1; /* details of REDIR PIPE DUP tokens */
52 tree *token(char*, int), *klook(char*), *tree1(int, tree*);
53 tree *tree2(int, tree*, tree*), *tree3(int, tree*, tree*, tree*);
54 tree *mung1(tree*, tree*), *mung2(tree*, tree*, tree*);
55 tree *mung3(tree*, tree*, tree*, tree*), *epimung(tree*, tree*);
56 tree *simplemung(tree*), *heredoc(tree*);
60 * The first word of any code vector is a reference count.
61 * Always create a new reference to a code vector by calling codecopy(.).
62 * Always call codefree(.) when deleting a reference.
80 char *name; /* ascii name */
81 word *val; /* value */
83 code *fn; /* pointer to function's code vector */
85 int pc; /* pc of start of function */
86 var *next; /* next on hash or local list */
88 var *vlook(char*), *gvlook(char*), *newvar(char*, var*);
90 var *gvar[NVAR]; /* hash for globals */
91 #define new(type) ((type *)emalloc(sizeof(type)))
95 #define NOFILE 128 /* should come from <param.h> */
103 * Glob character escape in strings:
104 * In a string, GLOB must be followed by *?[ or GLOB.
105 * GLOB* matches any string
106 * GLOB? matches any single character
107 * GLOB[...] matches anything in the brackets
108 * GLOBGLOB matches GLOB
110 #define GLOB ((char)0x01)
112 * onebyte(c), twobyte(c), threebyte(c)
113 * Is c the first character of a one- two- or three-byte utf sequence?
115 #define onebyte(c) ((c&0x80)==0x00)
116 #define twobyte(c) ((c&0xe0)==0xc0)
117 #define threebyte(c) ((c&0xf0)==0xe0)
120 int nerror; /* number of errors encountered during compilation */
121 int doprompt; /* is it time for a prompt? */
123 * Which fds are the reading/writing end of a pipe?
124 * Unfortunately, this can vary from system to system.
125 * 9th edition Unix doesn't care, the following defines
130 extern char *Rcmain(), Fdprefix[];
133 * How many dot commands have we executed?
134 * Used to ensure that -v flag doesn't print rcmain.
137 char *getstatus(void);