projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a7e60862 WJ |
1 | |
| 2 | /******************************************** | |
| 3 | scan.h | |
| 4 | copyright 1991, Michael D. Brennan | |
| 5 | ||
| 6 | This is a source file for mawk, an implementation of | |
| 7 | the AWK programming language. | |
| 8 | ||
| 9 | Mawk is distributed without warranty under the terms of | |
| 10 | the GNU General Public License, version 2, 1991. | |
| 11 | ********************************************/ | |
| 12 | ||
| 13 | ||
| 14 | /* $Log: scan.h,v $ | |
| 15 | * Revision 5.1 91/12/05 07:59:33 brennan | |
| 16 | * 1.1 pre-release | |
| 17 | * | |
| 18 | */ | |
| 19 | ||
| 20 | ||
| 21 | /* scan.h */ | |
| 22 | ||
| 23 | #ifndef SCAN_H_INCLUDED | |
| 24 | #define SCAN_H_INCLUDED 1 | |
| 25 | ||
| 26 | #include <stdio.h> | |
| 27 | ||
| 28 | #ifndef MAKESCAN | |
| 29 | #include "symtype.h" | |
| 30 | #include "parse.h" | |
| 31 | #endif | |
| 32 | ||
| 33 | ||
| 34 | extern char scan_code[256] ; | |
| 35 | ||
| 36 | /* the scan codes to compactify the main switch */ | |
| 37 | ||
| 38 | #define SC_SPACE 1 | |
| 39 | #define SC_NL 2 | |
| 40 | #define SC_SEMI_COLON 3 | |
| 41 | #define SC_FAKE_SEMI_COLON 4 | |
| 42 | #define SC_LBRACE 5 | |
| 43 | #define SC_RBRACE 6 | |
| 44 | #define SC_QMARK 7 | |
| 45 | #define SC_COLON 8 | |
| 46 | #define SC_OR 9 | |
| 47 | #define SC_AND 10 | |
| 48 | #define SC_PLUS 11 | |
| 49 | #define SC_MINUS 12 | |
| 50 | #define SC_MUL 13 | |
| 51 | #define SC_DIV 14 | |
| 52 | #define SC_MOD 15 | |
| 53 | #define SC_POW 16 | |
| 54 | #define SC_LPAREN 17 | |
| 55 | #define SC_RPAREN 18 | |
| 56 | #define SC_LBOX 19 | |
| 57 | #define SC_RBOX 20 | |
| 58 | #define SC_IDCHAR 21 | |
| 59 | #define SC_DIGIT 22 | |
| 60 | #define SC_DQUOTE 23 | |
| 61 | #define SC_ESCAPE 24 | |
| 62 | #define SC_COMMENT 25 | |
| 63 | #define SC_EQUAL 26 | |
| 64 | #define SC_NOT 27 | |
| 65 | #define SC_LT 28 | |
| 66 | #define SC_GT 29 | |
| 67 | #define SC_COMMA 30 | |
| 68 | #define SC_DOT 31 | |
| 69 | #define SC_MATCH 32 | |
| 70 | #define SC_DOLLAR 33 | |
| 71 | #define SC_UNEXPECTED 34 | |
| 72 | ||
| 73 | #ifndef MAKESCAN | |
| 74 | ||
| 75 | /* global functions in scan.c */ | |
| 76 | ||
| 77 | void PROTO(scan_init, (char *) ) ; | |
| 78 | void PROTO(scan_cleanup, (void) ) ; | |
| 79 | void PROTO(eat_nl, (void) ) ; | |
| 80 | int PROTO(yylex, (void) ) ; | |
| 81 | ||
| 82 | ||
| 83 | extern YYSTYPE yylval ; | |
| 84 | ||
| 85 | #define ct_ret(x) return current_token = (x) | |
| 86 | ||
| 87 | #define next() (*buffp ? *buffp++ : slow_next()) | |
| 88 | #define un_next() buffp-- | |
| 89 | ||
| 90 | #define test1_ret(c,x,d) if ( next() == (c) ) ct_ret(x) ;\ | |
| 91 | else { un_next() ; ct_ret(d) ; } | |
| 92 | ||
| 93 | #define test2_ret(c1,x1,c2,x2,d) switch( next() )\ | |
| 94 | { case c1: ct_ret(x1) ;\ | |
| 95 | case c2: ct_ret(x2) ;\ | |
| 96 | default: un_next() ;\ | |
| 97 | ct_ret(d) ; } | |
| 98 | #endif /* ! MAKESCAN */ | |
| 99 | #endif |