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Ingy döt Net 2026-02-01 16:33:20 -08:00
parent 5150844a7d
commit 4bb20c9b71
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Task/Rosetta-Code-Rank-languages-by-popularity/Ada/rosetta-code-rank-languages-by-popularity.ada
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pragma Ada_2022;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
with Ada.Strings.Fixed; use Ada.Strings.Fixed;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Containers.Ordered_Sets;
with Ada.Strings.Unbounded.Less_Case_Insensitive;
with Ada.Characters.Handling; use Ada.Characters.Handling;
with AWS.Client; use AWS.Client;
with AWS.Messages; use AWS.Messages;
with AWS.Response;
procedure Rank_Languages_By_Popularity is
use Ada.Strings;
function "+" (S : String) return Unbounded_String
renames To_Unbounded_String;
type A_Language_Count is
record
Count : Natural := 0;
Language : Unbounded_String;
end record;
function "=" (L, R : A_Language_Count) return Boolean is
begin
return L.Language = R.Language;
end "=";
function "<" (L, R : A_Language_Count) return Boolean is
begin
-- Sort by 'Count' and then by Language name
return L.Count < R.Count
or else (L.Count = R.Count
and then Less_Case_Insensitive
(Left => L.Language,
Right => R.Language));
end "<";
package Sets is new Ada.Containers.Ordered_Sets (A_Language_Count);
use Sets;
Counts : Set;
procedure Find_Counts (S : String) is
function Strip_Character (S : String; C : Character) return String is
S_Copy_Str : String (1 .. S'Length);
S_Copy_Index : Natural := 0;
begin
for I in S'Range loop
if S (I) /= C then
S_Copy_Index := S_Copy_Index + 1;
S_Copy_Str (S_Copy_Index) := S (I);
end if;
end loop;
return S_Copy_Str (S_Copy_Str'First .. S_Copy_Index);
end Strip_Character;
function Ignore_Category (L : String) return Boolean is
type Unbounded_String_Array is array (Positive range <>)
of Unbounded_String;
-- This list is quite comprehensive, but not complete
Categories_To_Ignore : Unbounded_String_Array := [
+"Pages with syntax highlighting errors",
+"Programming",
+"Examples needing attention",
+"Tasks needing attention",
+"Language users",
+"Implementations",
+"Solutions by ",
+"Maintenance/OmitCategoriesCreated",
+"Collection Members",
+"Pages with too many expensive parser function calls",
+"Garbage collection",
+" User",
+"SQL User",
+"Typing",
+"Parameter passing",
+"Execution method",
+"Unimplemented tasks by language",
+"Wolfram Language",
+"/Omit",
+"Wren-",
+"WrenGo",
+"Phix/",
+"PhixClass",
+"Basic language learning",
+"Encyclopedia",
+"RCTemplates",
+"SysUtils",
+"Action! ",
+"Text processing",
+"Image processing",
+"Scala Digital Signal Processing",
+"List processing",
+"Digital signal processing",
+"Processing Python",
+"Classic CS problems and programs",
+"Brainf*** related",
+"Data Structures",
+"Perl modules",
+"Perl/",
+"Perl:LWP",
+"Perl 6 related",
+"Flow control",
+"Excessively difficult task",
+"WikiStubs",
+"Impl needed",
+"Recursion"
];
begin
for Category of Categories_To_Ignore loop
declare
Category_At : constant Natural :=
Index (+To_Lower (L),
To_Lower (To_String (Category)));
begin
if Category_At /= 0 then
return True;
end if;
end;
end loop;
return False;
end Ignore_Category;
Title_Str : constant String := "title=""Category:";
End_A_Tag_Str : constant String := "</a>";
Space_Paren_Str : constant String := " (";
Title_At : constant Natural := Index (S, Title_Str);
begin
if Title_At /= 0 then
declare
Closing_Bracket_At : constant Natural :=
Index (S (Title_At + Title_Str'Length .. S'Last), ">");
End_A_Tag_At : constant Natural :=
Index (S (Closing_Bracket_At + 1 .. S'Last), End_A_Tag_Str);
Language : constant String :=
S (Closing_Bracket_At + 1 .. End_A_Tag_At - 1);
Space_Paren_At : constant Natural :=
Index (S (End_A_Tag_At + 1 .. S'Last), Space_Paren_Str);
Space_At : constant Natural :=
Index (S (Space_Paren_At + Space_Paren_Str'Length + 1
.. S'Last),
" ");
Count : constant Natural :=
Natural'Value (
Strip_Character (
S (Space_Paren_At +
Space_Paren_Str'Length
.. Space_At - 1),
','));
begin
if Closing_Bracket_At /= 0
and then End_A_Tag_At /= 0
and then Space_Paren_At /= 0
and then Space_At /= 0
then
begin
if Ignore_Category (Language) = False then
Counts.Insert (New_Item => (Count, +Language));
end if;
exception
when Constraint_Error =>
Put_Line (Standard_Error, "Warning: repeated language: " &
Language);
-- Ignore repeated results.
null;
end;
end if;
-- Recursively parse the string for languages and counts
Find_Counts (S (Space_At + 1 .. S'Last));
end;
end if;
end Find_Counts;
Place : Natural := 1;
procedure Display (C : Cursor) is
begin
Put (Place, Width => 1); Put (". ");
Put (Element (C).Count, Width => 1); Put (" - ");
Put_Line (To_String (Element (C).Language));
Place := Place + 1;
end Display;
Http_Source : constant AWS.Response.Data :=
AWS.Client.Get ("http://rosettacode.org/w/index.php?" &
"title=Special:Categories&limit=5000",
Follow_Redirection => True);
Status : Status_Code;
begin
Put_Line ("Getting website data...");
Status := AWS.Response.Status_Code (Http_Source);
if Status not in Success then
Put_Line ("Unable to retrieve data => Status Code :" &
Image (Status) &
" Reason :" & Reason_Phrase (Status));
raise Connection_Error;
end if;
Put_Line ("Finding categories...");
Find_Counts (AWS.Response.Message_Body (Http_Source));
Put_Line ("Displaying categories...");
Counts.Reverse_Iterate (Display'Access);
Put_Line ("Process complete.");
end Rank_Languages_By_Popularity;