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/* @(#) token.h 1.4 92/01/15 21:53:17 */
struct token {
int tokno; /* token value, see below */
char *path; /* file name */
int line; /* line number at token start */
int end_line; /* line number at token end */
struct vstring *vstr; /* token contents */
struct token *next;
struct token *head;
struct token *tail;
};
/* Special token values */
#define TOK_LIST 256 /* () delimited list */
#define TOK_WORD 257 /* keyword or identifier */
#define TOK_NUMBER 258 /* one or more digits */
#define TOK_WSPACE 259 /* comment, white space, not newline */
#define TOK_OTHER 260 /* other token */
#define TOK_CONTROL 261 /* flow control keyword */
#define TOK_COMPOSITE 262 /* struct or union keyword */
#define TOK_DATE 263 /* date: Mmm dd yyyy */
#define TOK_TIME 264 /* time: hh:mm:ss */
#define TOK_VOID 265 /* void keyword */
/* Input/output functions and macros */
extern struct token *tok_get(); /* read next single token */
extern void tok_show(); /* display (composite) token */
extern struct token *tok_class(); /* classify tokens */
extern void tok_unget(); /* stuff token back into input */
extern void put_nl(); /* print newline character */
extern void tok_show_ch(); /* emit single-character token */
#define tok_flush(t) (tok_show(t), tok_free(t))
#ifdef DEBUG
#define put_ch(c) (putchar(last_ch = c),fflush(stdout))
#define put_str(s) (fputs(s,stdout),last_ch = 0,fflush(stdout))
#else
#define put_ch(c) putchar(last_ch = c)
#define put_str(s) (fputs(s,stdout),last_ch = 0)
#endif
/* Memory management */
struct token *tok_alloc(); /* allocate token storage */
extern void tok_free(); /* re-cycle storage */
/* Context */
extern char *in_path; /* current input path name */
extern int in_line; /* current input line number */
extern int last_ch; /* type of last output */
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