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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
;;;; 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-Z����������������������������./:()?!'&_~]
%%
;; 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)
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