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Diffstat (limited to 'src/scanner.l')
| -rw-r--r-- | src/scanner.l | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/scanner.l b/src/scanner.l new file mode 100644 index 0000000..3e984c4 --- /dev/null +++ b/src/scanner.l @@ -0,0 +1,147 @@ +/* $Id: scanner.l,v 1.1 2000-09-12 00:12:52 rjkaes Exp $ + * + * This builds the scanner for the tinyproxy configuration file. This + * file needs to stay in sync with grammar.y. If someone knows lex and yacc + * better than I do, please update these files. + * + * Copyright (C) 2000 Robert James Kaes (rjkaes@flarenet.com) + * + * 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, 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. + */ +%{ + +#include "tinyproxy.h" +#include "grammar.h" +#include <string.h> +#include <stdio.h> + +struct keyword { + char *kw_name; + int kw_token; +}; + +static struct keyword keywords[] = { + /* statements */ + { "port", KW_PORT }, + { "logfile", KW_LOGFILE }, + { "syslog", KW_SYSLOG }, + { "maxclients", KW_MAXCLIENTS }, + { "maxspareservers", KW_MAXSPARESERVERS }, + { "minspareservers", KW_MINSPARESERVERS }, + { "startservers", KW_STARTSERVERS }, + { "maxrequestsperchild", KW_MAXREQUESTSPERCHILD }, + { "pidfile", KW_PIDFILE }, + { "timeout", KW_TIMEOUT }, + { "listen", KW_LISTEN }, + { "user", KW_USER }, + { "group", KW_GROUP }, + { "anonymous", KW_ANONYMOUS }, + { "filter", KW_FILTER }, + { "xtinyproxy", KW_XTINYPROXY }, + { "tunnel", KW_TUNNEL }, + { "allow", KW_ALLOW }, + { "deny", KW_DENY }, + + /* on/off switches */ + { "yes", KW_YES }, + { "on", KW_YES }, + { "no", KW_NO }, + { "off", KW_NO } + +}; + +#define YY_NO_UNPUT 1 + +#define MAX_REGEXP_LEN 1024 + +unsigned int yylineno = 1; +char tiny_buf[MAX_REGEXP_LEN]; +char *tiny_str; + +static int check_reserved_words(char *token); +static void append_string(int length, char *str); +static void append_char(char c); +%} + +%option noyywrap + +white [ \t] +digit [0-9] +alpha [a-zA-Z] +alphanum [a-zA-Z0-9] +word [^ \#'"\(\)\{\}\\;\n\t,|\.] + +%x string + +%% + +\#.*$ ; +\n { yylineno++; return '\n'; } +{white}+ ; +0x{digit}+ { yylval.num = strtol(yytext, NULL, 16); return NUMBER; } +0{digit}+ { yylval.num = strtol(yytext, NULL, 8); return NUMBER; } +{digit}+ { yylval.num = atoi(yytext); return NUMBER; } +{alpha}+ { return check_reserved_words(yytext); } +':' { return ':'; } +'/' { return '/'; } +\" { + tiny_str = tiny_buf; + BEGIN(string); + } +<string>\\a { append_char(7); } +<string>\\n { append_char(10); } +<string>\\r { append_char(13); } +<string>\\t { append_char(9); } +<string>\\v { append_char(11); } +<string>\\[^anrtv] { append_string(1, yytext + 1); } +<string>\" { + BEGIN(INITIAL); + yylval.cptr = strdup(tiny_buf); + return STRING; + } +<string>[^"\\]+ { append_string(strlen(yytext), yytext); } + + +({digit}{1,3}\.){3}{digit}{1,3} { yylval.cptr = strdup(yytext); return NUMERIC_ADDRESS; } +({digit}{1,3}\.){3}{digit}{1,3}\/{digit}+ { yylval.cptr = strdup(yytext); return NETMASK_ADDRESS; } +([-_a-z0-9]+\.)+[a-z]+ { yylval.cptr = strdup(yytext); return STRING_ADDRESS; } + + +%% + +int check_reserved_words(char *token) +{ + int i; + + for (i = 0; i < (sizeof(keywords) / sizeof(struct keyword)); i++) { + if (strcasecmp(keywords[i].kw_name, token) == 0) { + return keywords[i].kw_token; + } + } + yylval.cptr = strdup(token); + return IDENTIFIER; +} + +static void append_string(int length, char *s) +{ + int to_copy = min(MAX_REGEXP_LEN - (tiny_str - tiny_buf) - 1, length); + + memcpy(tiny_str, s, to_copy); + tiny_str += to_copy; + *tiny_str = 0; +} + +static void append_char(char c) +{ + *tiny_str = c; + tiny_str++; + *tiny_str = 0; +}
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