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open List
open Printf
open Common
let (lines_starts : (string, int list) Hashtbl.t) = Hashtbl.create 4
let current_file_lines_starts = ref []
let current_file_current_line = ref 0
let current_file = ref ""
let start_a_new_file file =
if !current_file <> "" then Hashtbl.add lines_starts !current_file !current_file_lines_starts ;
current_file := file ;
current_file_lines_starts := [0]
let add_a_file file file_lines_starts = Hashtbl.replace lines_starts file file_lines_starts
let get_lines_starts_for_file file =
if file = !current_file then !current_file_lines_starts else Hashtbl.find lines_starts file
let cwd = expand_symlinks (Unix.getcwd())
let file_to_absolute_file file =
let abs_file =
if file.[0] = '/' then file else
if file = "." then cwd else cwd ^ "/" ^ file
in
expand_symlinks abs_file
let absolute_file_to_file =
let s1 = Filename.dirname cwd in
if String.length s1 < 4 then (fun x -> x) else
let short_cwd =
let s2 = Filename.dirname s1 in
if String.length s2 < 4 then s1 else
let s3 = Filename.dirname s2 in (* allow up to ../../../xxx *)
if String.length s3 < 4 then s2 else s3 in
memoize (fun abs_file ->
if str_begins_with abs_file (short_cwd ^ "/") then
let rec to_file rel cwd =
if str_begins_with abs_file (cwd ^ "/") then
rel ^ skip_n_char_ (String.length cwd + 1) 0 abs_file
else
to_file ("../" ^ rel) (Filename.dirname cwd)
in
to_file "" cwd
else
abs_file)
let raw_pos2raw_line file a =
let starts = map_index (fun a b -> a,b) (rev (get_lines_starts_for_file file)) in
let ((offset, line), _) = find (fun (_,(e,_)) -> e > a) (combine starts (tl starts @ [999999999, 999999999])) in
line, offset
let pos2line (file, a, b) =
let line, offset = raw_pos2raw_line file a in
file, line, a - offset + 1, b - offset + 1
let pos2s (file, a, b) = sprintf "(%s, %d, %d)" file a b
let pos2sfull pos =
try
let file, line, n1, n2 = pos2line pos in
sprintf "File \"%s\", line %d, character %d-%d\n" (absolute_file_to_file file) (line + 1) n1 n2
with Not_found -> failwith ("bad position " ^ pos2s pos)
let pos2s_for_po pos =
let file, line, _, _ = pos2line pos in
absolute_file_to_file file ^ ":" ^ string_of_int (line + 1)
let is_on_same_line file (a,b) =
let line_a, _ = raw_pos2raw_line file a in
let line_b, _ = raw_pos2raw_line file b in
line_a = line_b
let is_on_same_line_current (a,b) = is_on_same_line !current_file (a,b)
let pos2sfull_current a b = pos2sfull (!current_file, a, b)
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