From 1a3cb9d9b0ab24d21d7e4edb70bb4a939f621082 Mon Sep 17 00:00:00 2001 From: Kenneth Heafield Date: Sat, 12 May 2012 14:01:52 -0400 Subject: Give in and copy bjam into cdec source code --- jam-files/engine/scan.h | 56 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 jam-files/engine/scan.h (limited to 'jam-files/engine/scan.h') diff --git a/jam-files/engine/scan.h b/jam-files/engine/scan.h new file mode 100644 index 00000000..3fad1c24 --- /dev/null +++ b/jam-files/engine/scan.h @@ -0,0 +1,56 @@ +/* + * Copyright 1993, 1995 Christopher Seiwald. + * + * This file is part of Jam - see jam.c for Copyright information. + */ + +/* + * scan.h - the jam yacc scanner + * + * External functions: + * + * yyerror( char *s ) - print a parsing error message. + * yyfparse( char *s ) - scan include file s. + * yylex() - parse the next token, returning its type. + * yymode() - adjust lexicon of scanner. + * yyparse() - declaration for yacc parser. + * yyanyerrors() - indicate if any parsing errors occured. + * + * The yymode() function is for the parser to adjust the lexicon of the scanner. + * Aside from normal keyword scanning, there is a mode to handle action strings + * (look only for the closing }) and a mode to ignore most keywords when looking + * for a punctuation keyword. This allows non-punctuation keywords to be used in + * lists without quoting. + */ + +/* + * YYSTYPE - value of a lexical token + */ + +#define YYSTYPE YYSYMBOL + +typedef struct _YYSTYPE +{ + int type; + char * string; + PARSE * parse; + LIST * list; + int number; + char * file; + int line; +} YYSTYPE; + +extern YYSTYPE yylval; + +void yymode( int n ); +void yyerror( char * s ); +int yyanyerrors(); +void yyfparse( char * s ); +int yyline(); +int yylex(); +int yyparse(); +void yyinput_stream( char * * name, int * line ); + +# define SCAN_NORMAL 0 /* normal parsing */ +# define SCAN_STRING 1 /* look only for matching } */ +# define SCAN_PUNCT 2 /* only punctuation keywords */ -- cgit v1.2.3