Chip 1997 April/Chip_1997-04_cd.bin/prezent/cb/data.z/INIFILES.PAS

Pascal/Delphi Source File | 1997-01-16 | 5KB | 186 lines

{*******************************************************}
{                                                       }
{       Delphi Visual Component Library                 }
{                                                       }
{       Copyright (c) 1995,96 Borland International     }
{                                                       }
{*******************************************************}

unit IniFiles;

{$R-}

interface

uses Windows, Classes;

type
  TIniFile = class(TObject)
  private
    FFileName: string;
  public
    constructor Create(const FileName: string);
    function ReadString(const Section, Ident, Default: string): string;
    procedure WriteString(const Section, Ident, Value: String);
    function ReadInteger(const Section, Ident: string;
      Default: Longint): Longint;
    procedure WriteInteger(const Section, Ident: string; Value: Longint);
    function ReadBool(const Section, Ident: string;
      Default: Boolean): Boolean;
    procedure WriteBool(const Section, Ident: string; Value: Boolean);
    procedure ReadSection(const Section: string; Strings: TStrings);
    procedure ReadSections(Strings: TStrings);
    procedure ReadSectionValues(const Section: string; Strings: TStrings);
    procedure EraseSection(const Section: string);
    procedure DeleteKey(const Section, Ident: String);
    property FileName: string read FFileName;
  end;

implementation

uses SysUtils, Consts;

constructor TIniFile.Create(const FileName: string);
begin
  FFileName := FileName;
end;

function TIniFile.ReadString(const Section, Ident, Default: string): string;
var
  Buffer: array[0..1023] of Char;
begin
  SetString(Result, Buffer, GetPrivateProfileString(PChar(Section),
    PChar(Ident), PChar(Default), Buffer, SizeOf(Buffer), PChar(FFileName)));
end;

procedure TIniFile.WriteString(const Section, Ident, Value: string);
begin
  if not WritePrivateProfileString(PChar(Section), PChar(Ident),
    PChar(Value), PChar(FFileName)) then
    raise Exception.CreateResFmt(SIniFileWriteError, [FileName]);
end;

function TIniFile.ReadInteger(const Section, Ident: string;
  Default: Longint): Longint;
var
  IntStr: string;
begin
  IntStr := ReadString(Section, Ident, '');
  if (Length(IntStr) > 2) and (IntStr[1] = '0') and
    ((IntStr[2] = 'X') or (IntStr[2] = 'x')) then
    IntStr := '$' + Copy(IntStr, 3, Maxint);
  Result := StrToIntDef(IntStr, Default);
end;

procedure TIniFile.WriteInteger(const Section, Ident: string; Value: Longint);
begin
  WriteString(Section, Ident, IntToStr(Value));
end;

function TIniFile.ReadBool(const Section, Ident: string;
  Default: Boolean): Boolean;
begin
  Result := ReadInteger(Section, Ident, Ord(Default)) <> 0;
end;

procedure TIniFile.WriteBool(const Section, Ident: string; Value: Boolean);
const
  Values: array[Boolean] of string = ('0', '1');
begin
  WriteString(Section, Ident, Values[Value]);
end;

procedure TIniFile.ReadSections(Strings: TStrings);
const
  BufSize = 8192;
var
  Buffer, P: PChar;
begin
  GetMem(Buffer, BufSize);
  try
    Strings.BeginUpdate;
    try
      Strings.Clear;
      if GetPrivateProfileString(nil, nil, nil, Buffer, BufSize,
        PChar(FFileName)) <> 0 then
      begin
        P := Buffer;
        while P^ <> #0 do
        begin
          Strings.Add(P);
          Inc(P, StrLen(P) + 1);
        end;
      end;
    finally
      Strings.EndUpdate;
    end;
  finally
    FreeMem(Buffer, BufSize);
  end;
end;

procedure TIniFile.ReadSection(const Section: string; Strings: TStrings);
const
  BufSize = 8192;
var
  Buffer, P: PChar;
begin
  GetMem(Buffer, BufSize);
  try
    Strings.BeginUpdate;
    try
      Strings.Clear;
      if GetPrivateProfileString(PChar(Section), nil, nil, Buffer, BufSize,
        PChar(FFileName)) <> 0 then
      begin
        P := Buffer;
        while P^ <> #0 do
        begin
          Strings.Add(P);
          Inc(P, StrLen(P) + 1);
        end;
      end;
    finally
      Strings.EndUpdate;
    end;
  finally
    FreeMem(Buffer, BufSize);
  end;
end;

procedure TIniFile.ReadSectionValues(const Section: string; Strings: TStrings);
var
  KeyList: TStringList;
  I: Integer;
begin
  KeyList := TStringList.Create;
  try
    ReadSection(Section, KeyList);
    Strings.BeginUpdate;
    try
      for I := 0 to KeyList.Count - 1 do
        Strings.Values[KeyList[I]] := ReadString(Section, KeyList[I], '');
    finally
      Strings.EndUpdate;
    end;
  finally
    KeyList.Free;
  end;
end;

procedure TIniFile.EraseSection(const Section: string);
begin
  if not WritePrivateProfileString(PChar(Section), nil, nil,
    PChar(FFileName)) then
    raise Exception.CreateResFmt(SIniFileWriteError, [FileName]);
end;

procedure TIniFile.DeleteKey(const Section, Ident: String);
begin
  WritePrivateProfileString(PChar(Section), PChar(Ident), nil,
     PChar(FFileName));
end;

end.