diff options
Diffstat (limited to 'gnu/usr.bin/bc/scan.l')
| -rw-r--r-- | gnu/usr.bin/bc/scan.l | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/gnu/usr.bin/bc/scan.l b/gnu/usr.bin/bc/scan.l deleted file mode 100644 index 818936410d0d..000000000000 --- a/gnu/usr.bin/bc/scan.l +++ /dev/null @@ -1,196 +0,0 @@ -%{ -/* scan.l: the (f)lex description file for the scanner. */ - -/* This file is part of bc written for MINIX. - Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License , or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; see the file COPYING. If not, write to - the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - - You may contact the author by: - e-mail: phil@cs.wwu.edu - us-mail: Philip A. Nelson - Computer Science Department, 9062 - Western Washington University - Bellingham, WA 98226-9062 - -*************************************************************************/ - -#include "bcdefs.h" -#include "y.tab.h" -#include "global.h" -#include "proto.h" - -/* Using flex, we can ask for a smaller input buffer. With lex, this - does nothing! */ - -#ifdef SMALL_BUF -#undef YY_READ_BUF_SIZE -#define YY_READ_BUF_SIZE 512 -#endif - -/* We want to define our own yywrap. */ -#undef yywrap -_PROTOTYPE(int yywrap, (void)); - -/* MINIX returns from read with < 0 if SIGINT is encountered. - In flex, we can redefine YY_INPUT to the following. In lex, this - does nothing! */ -#include <errno.h> -#undef YY_INPUT -#define YY_INPUT(buf,result,max_size) \ - while ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \ - if (errno != EINTR) \ - YY_FATAL_ERROR( "read() in flex scanner failed" ); - -%} -DIGIT [0-9A-F] -LETTER [a-z] -%% -define return(Define); -break return(Break); -quit return(Quit); -length return(Length); -return return(Return); -for return(For); -if return(If); -while return(While); -sqrt return(Sqrt); -scale return(Scale); -ibase return(Ibase); -obase return(Obase); -auto return(Auto); -else return(Else); -read return(Read); -halt return(Halt); -last return(Last); -warranty return(Warranty); -continue return(Continue); -print return(Print); -limits return(Limits); -"." { -#ifdef DOT_IS_LAST - return(Last); -#else - yyerror ("illegal character: %s",yytext); -#endif - } -"+"|"-"|";"|"("|")"|"{"|"}"|"["|"]"|","|"^" { yylval.c_value = yytext[0]; - return((int)yytext[0]); } -&& { return(AND); } -\|\| { return(OR); } -"!" { return(NOT); } -"*"|"/"|"%" { yylval.c_value = yytext[0]; return(MUL_OP); } -"="|\+=|-=|\*=|\/=|%=|\^= { yylval.c_value = yytext[0]; return(ASSIGN_OP); } -=\+|=-|=\*|=\/|=%|=\^ { -#ifdef OLD_EQ_OP - char warn_save; - warn_save = warn_not_std; - warn_not_std = TRUE; - warn ("Old fashioned =<op>"); - warn_not_std = warn_save; - yylval.c_value = yytext[1]; -#else - yylval.c_value = '='; - yyless (1); -#endif - return(ASSIGN_OP); - } -==|\<=|\>=|\!=|"<"|">" { yylval.s_value = strcopyof(yytext); return(REL_OP); } -\+\+|-- { yylval.c_value = yytext[0]; return(INCR_DECR); } -"\n" { line_no++; return(NEWLINE); } -\\\n { line_no++; /* ignore a "quoted" newline */ } -[ \t]+ { /* ignore spaces and tabs */ } -"/*" { - int c; - - for (;;) - { - while ( ((c=input()) != '*') && (c != EOF)) - /* eat it */ - if (c == '\n') line_no++; - if (c == '*') - { - while ( (c=input()) == '*') /* eat it*/; - if (c == '/') break; /* at end of comment */ - if (c == '\n') line_no++; - } - if (c == EOF) - { - fprintf (stderr,"EOF encountered in a comment.\n"); - break; - } - } - } -[a-z][a-z0-9_]* { yylval.s_value = strcopyof(yytext); return(NAME); } -\"[^\"]*\" { - unsigned char *look; - int count = 0; - yylval.s_value = strcopyof(yytext); - for (look = yytext; *look != 0; look++) - { - if (*look == '\n') line_no++; - if (*look == '"') count++; - } - if (count != 2) yyerror ("NUL character in string."); - return(STRING); - } -{DIGIT}({DIGIT}|\\\n)*("."({DIGIT}|\\\n)*)?|"."(\\\n)*{DIGIT}({DIGIT}|\\\n)* { - unsigned char *src, *dst; - int len; - /* remove a trailing decimal point. */ - len = strlen(yytext); - if (yytext[len-1] == '.') - yytext[len-1] = 0; - /* remove leading zeros. */ - src = yytext; - dst = yytext; - while (*src == '0') src++; - if (*src == 0) src--; - /* Copy strings removing the newlines. */ - while (*src != 0) - { - if (*src == '\\') - { - src++; src++; - line_no++; - } - else - *dst++ = *src++; - } - *dst = 0; - yylval.s_value = strcopyof(yytext); - return(NUMBER); - } -. { - if (yytext[0] < ' ') - yyerror ("illegal character: ^%c",yytext[0] + '@'); - else - if (yytext[0] > '~') - yyerror ("illegal character: \\%3d", (int) yytext[0]); - else - yyerror ("illegal character: %s",yytext); - } -%% - - - -/* This is the way to get multiple files input into lex. */ - -int -yywrap() -{ - if (!open_new_file ()) return (1); /* EOF on standard in. */ - return (0); /* We have more input. */ -} |