4.3BSD - /usr/src/new/B/src/bsmall/b2syn.h

   1: /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */
   2: /* $Header: b2syn.h,v 1.1 84/06/28 00:48:52 timo Exp $ */
   3: 
   4: /* bsyn.h: syntax */
   5: 
   6: /* General parsing routines */
   7: 
   8: #define Eotc '\0'
   9: #define Eouc '\036'
  10:         /* The character Eotc (end of text char)		*/
  11:         /* is placed after the last read character in txbuf.	*/
  12:         /* In general it follows a newline.			*/
  13:         /* If Eotc is encountered and more input is required,	*/
  14:         /* getline() is called.					*/
  15:         /* Eouc (end of unit char) is similar except the system	*/
  16:         /* never has to read beyond it.				*/
  17: 
  18: #define Char(tx) (*(tx))
  19: #define Eol(tx) (Char(tx) == '\n' || Char(tx) == Eouc)
  20: #define Ceol(tx) (Char(tx) == '\\' || Eol(tx))
  21: #define To_eol(tx) while (!Eol(tx)) tx++;
  22: #define Mark_unit_end(tx) *tx= Eouc;
  23: 
  24: #define Space(c) ((c) == ' ' || (c) == '\t')
  25: #define Skipsp(tx) while(Space(Char(tx))) tx++
  26: 
  27: #define Letter(c) ('a'<=c&&c<='z')
  28: #define Cap(c) ('A'<=c&&c<='Z')
  29: #define Dig(c) ('0'<=c&&c<='9')
  30: #define Keymark(c) (Cap(c) || Dig(c) || c=='\'' || c=='"')
  31: #define Tagmark(c) (Letter(c) || Dig(c) || c=='\'' || c=='"')
  32: #define Keytagmark(c) (Keymark(c) || Letter(c))
  33: #define Anytormark(c) (c=='+' || c=='-' || c=='*' || c=='/' || c=='#')
  34: #define Montormark(c) (c=='~' || Anytormark(c))
  35: #define Dyatormark(c) (Anytormark(c) || c=='^' || c=='<' || c=='>')
  36: 
  37: /* Procedure upto(); */
  38: /* Procedure need(); */
  39: /* Procedure nothing(); */
  40: /* Procedure thought(); */
  41: /* Procedure findceol(); */
  42: bool ateol();
  43: 
  44: value findkw();
  45: value keyword();
  46: /* Procedure reqkw(); */
  47: /* Procedure req(); */
  48: value tag();
  49: 
  50: bool atkw();
  51: bool find();
  52: intlet count();
  53: 
  54: txptr fcol();
  55: txptr lcol();
  56: extern intlet alino;
  57: extern txptr txstart, txend; /*TEMPORARY if possible*/
  58: 
  59: /* Procedure getline(); */
  60: intlet ilev();
  61: /* Procedure veli(); */
  62: /* Procedure inistreams(); */
  63: /* Procedure re_streams(); */
  64: /* Procedure open_stream(); */
  65: /* Procedure close_stream(); */

Defined macros

Usage of this include