diff options
Diffstat (limited to 'crypto/heimdal/lib/sl/slc-lex.l')
| -rw-r--r-- | crypto/heimdal/lib/sl/slc-lex.l | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/sl/slc-lex.l b/crypto/heimdal/lib/sl/slc-lex.l new file mode 100644 index 0000000..b810b12 --- /dev/null +++ b/crypto/heimdal/lib/sl/slc-lex.l @@ -0,0 +1,164 @@ +%{ +/* + * Copyright (c) 2004 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* $Id: slc-lex.l 15118 2005-05-10 22:19:01Z lha $ */ + +#undef ECHO + +#include <stdio.h> +#include <string.h> +#include <stdarg.h> +#include <stdlib.h> +#include "slc.h" +#include "slc-gram.h" +unsigned lineno = 1; + +static void handle_comment(void); +static char * handle_string(void); + +#define YY_NO_UNPUT + +#undef ECHO + +%} +%% +[A-Za-z][-A-Za-z0-9_]* { + yylval.string = strdup ((const char *)yytext); + return LITERAL; + } +"\"" { yylval.string = handle_string(); return STRING; } +\n { ++lineno; } +\/\* { handle_comment(); } +[={}] { return *yytext; } +[ \t] ; +%% + +void +error_message (const char *format, ...) +{ + va_list args; + + va_start (args, format); + fprintf (stderr, "%s:%d: ", filename, lineno); + vfprintf (stderr, format, args); + va_end (args); + error_flag++; +} + +void +yyerror (char *s) +{ + error_message("%s\n", s); +} + +static void +handle_comment(void) +{ + int c; + int start_lineno = lineno; + int level = 1; + int seen_star = 0; + int seen_slash = 0; + while((c = input()) != EOF) { + if(c == '/') { + if(seen_star) { + if(--level == 0) + return; + seen_star = 0; + continue; + } + seen_slash = 1; + continue; + } + if(seen_star && c == '/') { + if(--level == 0) + return; + seen_star = 0; + continue; + } + if(c == '*') { + if(seen_slash) { + level++; + seen_star = seen_slash = 0; + continue; + } + seen_star = 1; + continue; + } + seen_star = seen_slash = 0; + if(c == '\n') { + lineno++; + continue; + } + } + if(c == EOF) + error_message("unterminated comment, possibly started on line %d\n", start_lineno); +} + +static char * +handle_string(void) +{ + char x[1024]; + int i = 0; + int c; + int quote = 0; + while((c = input()) != EOF){ + if(quote) { + x[i++] = '\\'; + x[i++] = c; + quote = 0; + continue; + } + if(c == '\n'){ + error_message("unterminated string"); + lineno++; + break; + } + if(c == '\\'){ + quote++; + continue; + } + if(c == '\"') + break; + x[i++] = c; + } + x[i] = '\0'; + return strdup(x); +} + +int +yywrap () +{ + return 1; +} |
