diff options
Diffstat (limited to 'virt-df/virt_df_lvm2_lexer.mll')
| -rw-r--r-- | virt-df/virt_df_lvm2_lexer.mll | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/virt-df/virt_df_lvm2_lexer.mll b/virt-df/virt_df_lvm2_lexer.mll deleted file mode 100644 index 2dbe7e5..0000000 --- a/virt-df/virt_df_lvm2_lexer.mll +++ /dev/null @@ -1,165 +0,0 @@ -(* 'df' command for virtual domains. - (C) Copyright 2007-2008 Richard W.M. Jones, Red Hat Inc. - http://libvirt.org/ - - 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., 675 Mass Ave, Cambridge, MA 02139, USA. - *) - -(* Scanner for LVM2 metadata. - * ocamllex tutorial: - * http://plus.kaist.ac.kr/~shoh/ocaml/ocamllex-ocamlyacc/ocamllex-tutorial/ - *) - -{ - open Printf - open Lexing - - open Virt_df - open Virt_df_lvm2_parser - - (* Temporary buffer used for parsing strings, etc. *) - let tmp = Buffer.create 80 - - exception Error of string -} - -let digit = ['0'-'9'] -let alpha = ['a'-'z' 'A'-'Z'] -let alphau = ['a'-'z' 'A'-'Z' '_'] -let alnum = ['a'-'z' 'A'-'Z' '0'-'9'] -let alnumu = ['a'-'z' 'A'-'Z' '0'-'9' '_'] -let ident = alphau alnumu* - -let whitespace = [' ' '\t' '\r' '\n']+ - -let escaped_char = '\\' _ - -rule token = parse - (* ignore whitespace and comments *) - | whitespace - | '#' [^ '\n']* - { token lexbuf } - - (* scan single character tokens *) - | '{' { LBRACE } - | '}' { RBRACE } - | '[' { LSQUARE } - | ']' { RSQUARE } - | '=' { EQ } - | ',' { COMMA } - - (* strings - see LVM2/lib/config/config.c *) - | '"' - { - Buffer.reset tmp; - STRING (dq_string lexbuf) - } - | '\'' - { - Buffer.reset tmp; - STRING (dq_string lexbuf) - } - - (* floats *) - | ('-'? digit+ '.' digit*) as f - { - let f = float_of_string f in - FLOAT f - } - - (* integers *) - | ('-'? digit+) as i - { - let i = Int64.of_string i in - INT i - } - - (* identifiers *) - | ident as id - { IDENT id } - - (* end of file *) - | eof - { EOF } - - | _ as c - { raise (Error (sprintf "%c: invalid character in input" c)) } - -and dq_string = parse - | '"' - { Buffer.contents tmp } - | escaped_char as str - { Buffer.add_char tmp str.[1]; dq_string lexbuf } - | eof - { raise (Error "unterminated string in metadata") } - | _ as c - { Buffer.add_char tmp c; dq_string lexbuf } - -and q_string = parse - | '\'' - { Buffer.contents tmp } - | escaped_char as str - { Buffer.add_char tmp str.[1]; q_string lexbuf } - | eof - { raise (Error "unterminated string in metadata") } - | _ as c - { Buffer.add_char tmp c; q_string lexbuf } - -{ - (* Demonstration of how to wrap the token function - with extra debugging statements: - let token lexbuf = - try - let r = token lexbuf in - if debug then - eprintf "Lexer: token returned is %s\n" - (match r with - | LBRACE -> "LBRACE" - | RBRACE -> "RBRACE" - | LSQUARE -> "LSQUARE" - | RSQUARE -> "RSQUARE" - | EQ -> "EQ" - | COMMA -> "COMMA" - | STRING s -> sprintf "STRING(%S)" s - | INT i -> sprintf "INT(%Ld)" i - | FLOAT f -> sprintf "FLOAT(%g)" f - | IDENT s -> sprintf "IDENT(%s)" s - | EOF -> "EOF"); - r - with - exn -> - prerr_endline (Printexc.to_string exn); - raise exn - *) - - (* Lex and parse input. - * - * Return the parsed metadata structure if everything went to plan. - * Raises [Error msg] if there was some parsing problem. - *) - let rec parse_lvm2_metadata_from_string str = - let lexbuf = Lexing.from_string str in - parse_lvm2_metadata lexbuf - and parse_lvm2_metadata_from_channel chan = - let lexbuf = Lexing.from_channel chan in - parse_lvm2_metadata lexbuf - and parse_lvm2_metadata lexbuf = - try - input token lexbuf - with - | Error _ as exn -> raise exn - | Parsing.Parse_error -> raise (Error "Parse error") - | exn -> raise (Error ("Exception: " ^ Printexc.to_string exn)) -} |