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|
(* camlp5r *)
(* ploc.ml,v *)
(* Copyright (c) INRIA 2007-2017 *)
#load "pa_macro.cmo";
type t =
{ fname : string;
line_nb : int;
bol_pos : int;
line_nb_last : int;
bol_pos_last : int;
bp : int;
ep : int;
comm : string;
ecomm : string }
;
value make_loc fname line_nb bol_pos (bp, ep) comm =
{fname = fname; line_nb = line_nb; bol_pos = bol_pos;
line_nb_last = line_nb; bol_pos_last = bol_pos;
bp = bp; ep = ep; comm = comm; ecomm = ""}
;
value make_unlined (bp, ep) =
{fname = ""; line_nb = 1; bol_pos = 0; line_nb_last = -1; bol_pos_last = 0;
bp = bp; ep = ep; comm = ""; ecomm = ""}
;
value dummy =
{fname = ""; line_nb = 1; bol_pos = 0; line_nb_last = -1; bol_pos_last = 0;
bp = 0; ep = 0; comm = ""; ecomm = ""}
;
value file_name loc = loc.fname;
value first_pos loc = loc.bp;
value last_pos loc = loc.ep;
value line_nb loc = loc.line_nb;
value bol_pos loc = loc.bol_pos;
value line_nb_last loc = loc.line_nb_last;
value bol_pos_last loc = loc.bol_pos_last;
value comment loc = loc.comm;
value comment_last loc = loc.ecomm;
value encl loc1 loc2 =
if loc1.bp < loc2.bp then
if loc1.ep < loc2.ep then
{fname = loc1.fname; line_nb = loc1.line_nb; bol_pos = loc1.bol_pos;
line_nb_last = loc2.line_nb_last; bol_pos_last = loc2.bol_pos_last;
bp = loc1.bp; ep = loc2.ep; comm = loc1.comm; ecomm = loc2.comm}
else
loc1
else
if loc2.ep < loc1.ep then
{fname = loc2.fname; line_nb = loc2.line_nb; bol_pos = loc2.bol_pos;
line_nb_last = loc1.line_nb_last; bol_pos_last = loc1.bol_pos_last;
bp = loc2.bp; ep = loc1.ep; comm = loc2.comm; ecomm = loc1.comm}
else
loc2
;
value shift sh loc = {(loc) with bp = sh + loc.bp; ep = sh + loc.ep};
value sub loc sh len = {(loc) with bp = loc.bp + sh; ep = loc.bp + sh + len};
value after loc sh len =
{(loc) with bp = loc.ep + sh; ep = loc.ep + sh + len}
;
value with_comment loc comm = {(loc) with comm = comm};
value with_comment_last loc ecomm = {(loc) with ecomm = ecomm};
value with_line_nb_last loc n = {(loc) with line_nb_last = n};
value with_bol_pos_last loc n = {(loc) with bol_pos_last = n};
value name = ref "loc";
value from_file fname loc =
let (bp, ep) = (first_pos loc, last_pos loc) in
try
let ic = open_in_bin fname in
let strm = Stream.of_channel ic in
let rec loop fname lin =
let rec not_a_line_dir col =
parser cnt
[ [: `c; s :] ->
if cnt < bp then
if c = '\n' then loop fname (lin + 1)
else not_a_line_dir (col + 1) s
else
let col = col - (cnt - bp) in
(fname, lin, col, col + ep - bp)
| [: :] ->
(fname, lin, col, col + 1) ]
in
let rec a_line_dir str n col =
parser
[ [: `'\n' :] -> loop str n
| [: `_; s :] -> a_line_dir str n (col + 1) s ]
in
let rec spaces col =
parser
[ [: `' '; s :] -> spaces (col + 1) s
| [: :] -> col ]
in
let rec check_string str n col =
parser
[ [: `'"'; col = spaces (col + 1); s :] -> a_line_dir str n col s
| [: `c when c <> '\n'; s :] ->
check_string (str ^ String.make 1 c) n (col + 1) s
| [: a = not_a_line_dir col :] -> a ]
in
let check_quote n col =
parser
[ [: `'"'; s :] -> check_string "" n (col + 1) s
| [: a = not_a_line_dir col :] -> a ]
in
let rec check_num n col =
parser
[ [: `('0'..'9' as c); s :] ->
check_num (10 * n + Char.code c - Char.code '0') (col + 1) s
| [: col = spaces col; s :] -> check_quote n col s ]
in
let begin_line =
parser
[ [: `'#'; col = spaces 1; s :] -> check_num 0 col s
| [: a = not_a_line_dir 0 :] -> a ]
in
begin_line strm
in
let r =
try loop fname 1 with
[ Stream.Failure ->
let bol = bol_pos loc in
(fname, line_nb loc, bp - bol, ep - bol) ]
in
do { close_in ic; r }
with
[ Sys_error _ -> (fname, 1, bp, ep) ]
;
value second_line fname ep0 (line, bp) ep = do {
let ic = open_in fname in
seek_in ic bp;
loop line bp bp where rec loop line bol p =
if p = ep then do {
close_in ic;
if bol = bp then (line, ep0)
else (line, ep - bol)
}
else do {
let (line, bol) =
match input_char ic with
[ '\n' -> (line + 1, p + 1)
| _ -> (line, bol) ]
in
loop line bol (p + 1)
}
};
value get loc = do {
if loc.fname = "" || loc.fname = "-" then do {
(loc.line_nb, loc.bp - loc.bol_pos, loc.line_nb, loc.ep - loc.bol_pos,
loc.ep - loc.bp)
}
else do {
let (bl, bc, ec) =
(loc.line_nb, loc.bp - loc.bol_pos, loc.ep - loc.bol_pos)
in
let (el, eep) = second_line loc.fname ec (bl, loc.bp) loc.ep in
(bl, bc, el, eep, ec - bc)
}
};
value call_with r v f a =
let saved = r.val in
try do {
r.val := v;
let b = f a in
r.val := saved;
b
}
with e -> do { r.val := saved; raise e }
;
exception Exc of t and exn;
value raise loc exc =
match exc with
[ Exc _ _ -> raise exc
| _ -> raise (Exc loc exc) ]
;
type vala 'a =
[ VaAnt of string
| VaVal of 'a ]
;
value warned = ref True;
value warning_deprecated_since_6_00 name =
if not warned.val then do {
Printf.eprintf "<W> %s deprecated since version 6.00" name;
warned.val := True
}
else ()
;
value make line_nb bol_pos (bp, ep) =
let _ = warning_deprecated_since_6_00 "Ploc.make" in
{fname = ""; line_nb = line_nb; bol_pos = bol_pos; line_nb_last = line_nb;
bol_pos_last = bol_pos; bp = bp; ep = ep; comm = ""; ecomm = ""}
;
value string_of_loc fname line bp ep =
match Sys.os_type with
[ "MacOS" ->
Printf.sprintf "File \"%s\"; line %d; characters %d to %d\n### " fname line
bp ep
| _ ->
Printf.sprintf "File \"%s\", line %d, characters %d-%d:\n" fname line bp ep ]
;
value string_of_location {fname=fname; bp=bp; ep=ep; line_nb=line; bol_pos=bol} =
string_of_loc fname line (bp - bol) (ep - bol)
;
|
