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%{ |
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|
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/* |
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* Boa, an http server |
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* Copyright (C) 1995 Paul Phillips <psp@well.com> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 1, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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/* $Id: boa_lexer.l,v 1.3 2002/09/25 07:33:35 nmav Exp $*/ |
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|
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#include "boa_grammar.h" |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include "parse.h" |
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|
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#define MAX_STR_CONST 1024 |
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#define qspush(c) \ |
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if (string_buf_ptr < string_buf+MAX_STR_CONST) \ |
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*string_buf_ptr++ = c; \ |
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else \ |
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yyerror("quoted string overflow"); |
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|
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char *mime_types = NULL; |
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|
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static int file = 0; |
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int lineno = 1; |
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struct ccommand *k; |
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char string_buf[MAX_STR_CONST]; |
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char *string_buf_ptr; |
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%} |
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|
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%s MIME |
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/* Quoted string handling (almost) straight out of |
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the flex 2.5 man page, April 1995 */ |
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%x STR |
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|
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%% |
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|
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[ \t]+ ; |
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#.* ; |
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|
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<MIME>[^ \t\n]+\/[^ \t\n]+ { yylval.sval = yytext; return MIMETYPE; } |
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|
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|
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[^ \"\t\n]+ { /* XXX could use better checks that we are in a state to |
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* accept keywords; this version matches original behavior */ |
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if ((YYSTATE==INITIAL) && (k=lookup_keyword(yytext))) { |
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yylval.cval=k; |
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return (k->type); |
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} else { yylval.sval = yytext; return STRING; } |
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} |
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|
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\" { |
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string_buf_ptr = string_buf; |
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BEGIN(STR); |
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} |
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|
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<STR>{ |
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\" { /* saw closing quote - all done */ |
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BEGIN(INITIAL); |
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*string_buf_ptr = '\0'; |
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/* return string constant token type and value to parser */ |
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yylval.sval = string_buf; return STRING; |
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} |
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|
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\n { |
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/* error - unterminated string constant */ |
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/* generate error message */ |
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yyerror("unterminated string constant"); |
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} |
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|
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\\[0-7]{1,3} { |
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/* octal escape sequence */ |
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int result; |
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|
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(void) sscanf( yytext + 1, "%o", &result ); |
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|
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if ( result > 0xff ) |
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{ /* error, constant is out-of-bounds */ } |
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|
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qspush(result); |
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} |
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|
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\\[0-9]+ { |
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/* generate error - bad escape sequence; something |
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* like '\48' or '\0777777' |
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*/ |
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yyerror("bad escape sequence"); |
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} |
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|
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\\n qspush('\n'); |
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\\t qspush('\t'); |
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\\r qspush('\r'); |
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\\b qspush('\b'); |
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\\f qspush('\f'); |
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|
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|
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\\(.|\n) *string_buf_ptr++ = yytext[1]; |
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|
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[^\\\n\"]+ { |
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char *yptr = yytext; |
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while ( *yptr ) |
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qspush(*yptr++); |
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} |
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} |
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/* End of <STR> dependence */ |
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\n { lineno++; } |
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%% |
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|
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/* In yywrap we track which file we are on. |
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* 1: close hydra.conf, open mime.types |
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* 2: return 1; |
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*/ |
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|
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int yywrap() |
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{ |
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fclose(yyin); |
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file++; |
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|
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switch(file) { |
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case 1: |
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yyin = fopen(mime_types, "r"); |
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if(!yyin) { |
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fprintf(stderr, "Could not open mime.types file, \"%s\", " |
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"for reading\n", mime_types); |
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exit(1); |
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} |
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BEGIN MIME; |
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return 0; |
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default: |
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BEGIN INITIAL; |
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file = 0; /* in case we reread config files */ |
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return 1; |
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} |
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} |
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|
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int yyerror(char * msg) |
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{ |
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fprintf(stderr, "Error on line %d of %s: %s\n", lineno, |
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(file == 0 ? "hydra.conf" : "mime.types"), msg); |
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return 1; |
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} |
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|