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+;;;; -*- Scheme -*-
+;;;; bibtex-lex.l -- SILex input for BibTeX
+;;;;
+;;;; Copyright © 2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
+;;;;
+;;;;
+;;;; 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; if not, write to the Free Software
+;;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+;;;; USA.
+;;;;
+;;;; Author: Erick Gallesio [eg@essi.fr]
+;;;; Creation date: 21-Oct-2004 17:47 (eg)
+;;;; Last file update: 25-Oct-2004 20:16 (eg)
+;;;;
+
+
+space [ \n\9]
+alpha [-+a-zA-ZàâäéèêëîïôöûüùÀÂÄÉÈÊËÎÏÔÖÛÜÙ./:()?!'&_~]
+
+%%
+
+;; Spaces
+{space}+ (list 'BLANK)
+;; Comment
+\%.*$ (yycontinue)
+;; equal sign
+= (list 'EQUAL)
+;; Open Bracket
+\{ (list 'LBRACKET)
+;; Close Bracket
+\} (list 'RBRACKET)
+;; Comma
+, (list 'COMMA)
+;; Strings
+\"[^\"]*\" (list 'STRING yytext)
+;; Commands
+@{alpha}+ (let* ((str (string-downcase
+ (substring yytext 1
+ (string-length yytext))))
+ (sym (string->symbol str)))
+ (case sym
+ ((string) (list 'BIBSTRING))
+ (else (list 'BIBITEM sym))))
+;; Ident
+{alpha}({alpha}|[0-9])* (list 'IDENT yytext)
+;; Number
+[0-9]+ (list 'NUMBER yytext)
+;; Diacritic
+\\['`^\"][aeiouAEIOU] (lex-char (string-ref yytext 1)
+ (string-ref yytext 2))
+\{\\['`^\"][aeiouAEIOU]\} (lex-char (string-ref yytext 2)
+ (string-ref yytext 3))
+
+;; Unrecognized character
+. (begin
+ (format (current-error-port)
+ "Skipping character ~S\n" yytext)
+ (yycontinue))
+
+;;;; ======================================================================
+<<EOF>> '*eoi*
+<<ERROR>> (error 'bibtex-lexer "Parse error" yytext)
+
+