directives.pars

linux 下的源代码分析阅读器 red hat公司新版

/*

		Compiler Directives
		===================

   Process compiler directives according to syntax of Micro Focus.
   Currently, the SET SOURCEFORMAT directive is interpreted, only.

*/

/* Ich, Doktor Josef Grosch, Informatiker, June 1997 */

PARSER directives

GLOBAL {
# include "Source.h"
}

PROPERTY INPUT

RULE

directive	= <
		= SET SOURCEFORMAT
		{ => { char s [256]; StGetString (Attribute.string.Value, s);
		       if (strncmp (s + 1, "FREE", 4) == 0) {
			  free_format = rtrue; MaxColumn = 1024;
		       } else if (strncmp (s + 1, "FIXED", 5) == 0) {
			  free_format = rfalse; MaxColumn = 72;
		       }
		}; } string .
		= SET name literal .
		= SET name .
		= DISPLAY string .
		= ELSE .
		= \END .
		= IF literal     operator literal .
		= IF literal NOT operator literal .
		= IF literal     DEFINED .
		= IF literal NOT DEFINED .
> .
literal		= <
		= unsigned_integer .
		= string .
> .
operator	= <
		= '<' .
		= '>' .
		= '=' .
> .

name		: 1 [Ident: tIdent	] { Ident := NoIdent	; } .
unsigned_integer: 3 [Value: long	] { Value := 0		; } .
string		: 8 [Value: tStringRef	] { Value := PutString (String, 0); } .