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String.ab@ 132

Last change on this file since 132 was 132, checked in by イグトランス (egtra), 17 years ago
String型の自身を変更するメソッドを、戻り値で返すように変更。併せて文字列比較を自前の関数で行うように変更。プロンプトのキャレットの位置計算が正しくなかったバグを修正。
File size: 12.2 KB

Rev	Line
[132]	1	' Classes/System/String.ab
	2
	3	#require <basic/function.sbp>
	4
[1]	5	Class String
[30]	6	m_Length As Long
[1]	7	Public
[119]	8	Chars As *Char
[1]	9
	10	Sub String()
[121]	11	Chars = _System_calloc(SizeOf (Char) * 1)
[30]	12	m_Length = 0
[1]	13	End Sub
	14
[119]	15	Sub String(initStr As *Char)
[1]	16	String()
	17	Assign(initStr)
	18	End Sub
[30]	19
[125]	20	Sub String(initStr As *Char, length As Long)
	21	String()
	22	Assign(initStr, length)
	23	End Sub
	24
[49]	25	Sub String(ByRef initStr As String)
[1]	26	String()
	27	Assign(initStr)
	28	End Sub
[49]	29
[1]	30	Sub String(length As Long)
[121]	31	String()
[1]	32	ReSize(length)
	33	End Sub
[121]	34
[119]	35	Sub String(initChar As Char, length As Long)
[1]	36	ReSize(length, initChar)
	37	End Sub
	38
	39	Sub ~String()
[123]	40	_System_free(Chars)
[31]	41	Chars = 0
[1]	42	#ifdef _DEBUG
[30]	43	m_Length = 0
[1]	44	#endif
	45	End Sub
	46
[121]	47	Const Function Length() As Long
[30]	48	Return m_Length
	49	End Function
	50
[119]	51	Function Operator() As *Char
[31]	52	Return Chars
[1]	53	End Function
	54
	55	Sub Operator = (ByRef objString As String)
[31]	56	Assign(objString.Chars, objString.m_Length)
[1]	57	End Sub
	58
[119]	59	Sub Operator = (text As *Char)
[1]	60	Assign(text)
	61	End Sub
	62
[132]	63	Const Function Operator [] (n As Long) As Char
[31]	64	Return Chars[n]
[1]	65	End Function
	66
[132]	67	Sub Operator []= (n As Long, c As Char)
[31]	68	Chars[n] = c
[1]	69	End Sub
	70
[132]	71	Const Function Operator + (pszText As *Char) As String
	72	Return Concat(pszText, lstrlen(pszText))
[1]	73	End Function
	74
[121]	75	Const Function Operator + (ByRef objString As String) As String
[30]	76	Return Concat(objString, objString.m_Length)
[1]	77	End Function
	78
[132]	79	Const Function Operator & (pszText As *Char) As String
	80	Dim tempString = This + pszText
[1]	81	Return tempString
	82	End Function
	83
[121]	84	Const Function Operator & (ByRef objString As String) As String
	85	Dim tempString = This + objString
[1]	86	Return tempString
	87	End Function
	88
[132]	89	Const Function Operator == (ByRef objString As String) As Boolean
	90	Return _System_StrCmp(This, objString) = 0
[1]	91	End Function
	92
[132]	93	Const Function Operator == (text As *Char) As Long
	94	Return _System_StrCmp(This, text) = 0
[1]	95	End Function
	96
[132]	97	Const Function Operator <> (ByRef objString As String) As Boolean
	98	Return _System_StrCmp(This, objString)
[1]	99	End Function
	100
[132]	101	Const Function Operator <> (text As *Char) As Boolean
	102	Return _System_StrCmp(This, text)
[1]	103	End Function
	104
[132]	105	Const Function Operator < (ByRef objString As String) As Boolean
	106	Return _System_StrCmp(This, objString) < 0
[1]	107	End Function
	108
[132]	109	Const Function Operator < (text As *Char) As Boolean
	110	Return _System_StrCmp(This, text) < 0
[1]	111	End Function
	112
[132]	113	Const Function Operator > (ByRef objString As String) As Boolean
	114	Return _System_StrCmp(This, objString) > 0
[1]	115	End Function
	116
[132]	117	Const Function Operator > (text As *Char) As Boolean
	118	Return _System_StrCmp(This, text) > 0
[1]	119	End Function
	120
[132]	121	Const Function Operator <= (ByRef objString As String) As Boolean
	122	Return _System_StrCmp(This, objString) <= 0
[1]	123	End Function
	124
[132]	125	Const Function Operator <= (text As *Char) As Boolean
	126	Return _System_StrCmp(This, text) <= 0
[1]	127	End Function
	128
[132]	129	Const Function Operator >= (ByRef objString As String) As Boolean
	130	Return _System_StrCmp(This, objString) => 0
[1]	131	End Function
	132
[132]	133	Const Function Operator >= (text As *Char) As Boolean
	134	Return _System_StrCmp(This, text) => 0
[1]	135	End Function
	136
[132]	137	Const Function StrPtr() As *Char
[31]	138	Return Chars
[1]	139	End Function
	140
	141	Sub ReSize(allocLength As Long)
	142	If allocLength < 0 Then Exit Sub
[30]	143	If allocLength > m_Length Then
[1]	144	Dim oldLength As Long
[30]	145	oldLength = m_Length
[1]	146	If AllocStringBuffer(allocLength) <> 0 Then
[121]	147	ZeroMemory(VarPtr(Chars[oldLength]), SizeOf (Char) * (m_Length - oldLength + 1))
[1]	148	End If
	149	Else
[30]	150	m_Length = allocLength
[31]	151	Chars[m_Length] = 0
[1]	152	End If
	153	End Sub
	154
[119]	155	Sub ReSize(allocLength As Long, c As Char)
[1]	156	If allocLength < 0 Then
	157	Exit Sub
[30]	158	ElseIf allocLength > m_Length Then
[1]	159	Dim oldLength As Long
[30]	160	oldLength = m_Length
[1]	161	If AllocStringBuffer(allocLength) <> 0 Then
[121]	162	Dim p = VarPtr(Chars[oldLength]) As *Char
	163	Dim fillLen = m_Length - oldLength
	164	Dim i As Long
	165	For i = 0 To ELM(fillLen)
	166	p[i] = c
	167	Next
[1]	168	End If
	169	Else
[30]	170	m_Length = allocLength
[1]	171	End If
[31]	172	Chars[m_Length] = 0
[1]	173	End Sub
	174
[121]	175	Sub Assign(text As *Char, textLength As Long)
	176	If text = Chars Then Exit Sub
[1]	177	If AllocStringBuffer(textLength) <> 0 Then
[121]	178	memcpy(Chars, text, SizeOf (Char) * textLength)
[31]	179	Chars[m_Length] = 0
[1]	180	End If
	181	End Sub
	182
	183	Sub Assign(ByRef objString As String)
[31]	184	Assign(objString.Chars, objString.m_Length)
[1]	185	End Sub
	186
[121]	187	Sub Assign(text As *Char)
	188	If text Then
	189	Assign(text, lstrlen(text))
[1]	190	Else
[31]	191	'Chars=_System_realloc(Chars,1)
	192	Chars[0] = 0
[30]	193	m_Length = 0
[1]	194	End If
	195	End Sub
	196
[121]	197	Sub Append(text As *Char, textLength As Long)
[1]	198	Dim prevLen As Long
[30]	199	prevLen = m_Length
	200	If AllocStringBuffer(m_Length + textLength) <> 0 Then
[121]	201	memcpy(VarPtr(Chars[prevLen]), text, SizeOf (Char) * textLength)
[31]	202	Chars[m_Length] = 0
[1]	203	End If
	204	End Sub
	205
[119]	206	Sub Append(text As *Char)
[1]	207	Append(text, lstrlen(text))
	208	End Sub
	209
	210	Sub Append(ByRef str As String)
[31]	211	Append(str.Chars, str.m_Length)
[1]	212	End Sub
	213
[132]	214	Const Function Clone() As String
	215	Return This
	216	End Function
	217
	218	Const Function Concat(lpszText As *Char, textLength As Long) As String
[1]	219	Dim tempString As String
	220	With tempString
[30]	221	.AllocStringBuffer(This.m_Length + textLength)
[121]	222	memcpy(.Chars, This.Chars, SizeOf (Char) * This.m_Length)
	223	memcpy(VarPtr(.Chars[This.m_Length]), lpszText, SizeOf (Char) * textLength)
[31]	224	.Chars[.m_Length] = 0
[1]	225	End With
	226	Return tempString
	227	End Function
	228
[132]	229	Const Function Contains(ByRef objString As String) As Boolean
	230	Return IndexOf(objString, 0, m_Length) >= 0
[1]	231	End Function
	232
[132]	233	Const Function Contains(lpszText As *Char) As Boolean
	234	Return IndexOf(lpszText, 0, m_Length) >= 0
[1]	235	End Function
	236
[132]	237	Const Function IndexOf(lpszText As *Char) As Long
[30]	238	Return IndexOf(lpszText, 0, m_Length)
[1]	239	End Function
	240
[132]	241	Const Function IndexOf(lpszText As *Char, startIndex As Long) As Long
[30]	242	Return IndexOf(lpszText, startIndex, m_Length - startIndex)
[1]	243	End Function
	244
[132]	245	Const Function IndexOf(lpszText As *Char, startIndex As Long, count As Long) As Long
	246	Dim length = lstrlen(lpszText)
[1]	247
	248	If startIndex < 0 Then Return -1
[30]	249	If count < 1 Or count + startIndex > m_Length Then Return -1
	250	If length > m_Length Then Return -1
[1]	251
	252	If length = 0 Then Return startIndex
	253
	254	Dim i As Long, j As Long
	255	For i = startIndex To startIndex + count - 1
	256	For j = 0 To length - 1
[31]	257	If Chars[i + j] = lpszText[j] Then
[1]	258	If j = length - 1 Then Return i
	259	Else
	260	Exit For
	261	End If
	262	Next
	263	Next
	264	Return -1
	265	End Function
	266
[132]	267	Const Function LastIndexOf(lpszText As *Char) As Long
[30]	268	Return LastIndexOf(lpszText, m_Length - 1, m_Length)
[1]	269	End Function
	270
[132]	271	Const Function LastIndexOf(lpszText As *Char, startIndex As Long) As Long
[119]	272	Return LastIndexOf(lpszText As *Char, startIndex, startIndex + 1)
[1]	273	End Function
	274
[132]	275	Const Function LastIndexOf(lpszText As *Char, startIndex As Long, count As Long) As Long
	276	Dim length = lstrlen(lpszText)
[1]	277
[30]	278	If startIndex < 0 Or startIndex > m_Length - 1 Then Return -1
[1]	279	If count < 1 Or count > startIndex + 2 Then Return -1
[30]	280	If length > m_Length Then Return -1
[1]	281
	282	If length = 0 Then Return startIndex
	283
	284	Dim i As Long, j As Long
	285	For i = startIndex To startIndex - count + 1 Step -1
	286	For j = length - 1 To 0 Step -1
[31]	287	If Chars[i + j] = lpszText[j] Then
[1]	288	If j = 0 Then Return i
	289	Else
	290	Exit For
	291	End If
	292	Next
	293	Next
	294	Return -1
	295	End Function
	296
[132]	297	Const Function StartsWith(lpszText As *Char) As Boolean
	298	Return IndexOf(lpszText) = 0
[1]	299	End Function
	300
[132]	301	Const Function EndsWith(lpszText As *Char) As Boolean
	302	Return LastIndexOf(lpszText) = m_Length - lstrlen(lpszText)
[1]	303	End Function
	304
[132]	305	Const Function Insert(startIndex As Long, text As String) As String
	306	Return Insert(startIndex, text.Chars, text.Length)
	307	End Function
[1]	308
[132]	309	Const Function Insert(startIndex As Long, text As *Char) As String
	310	Return Insert(startIndex, text, lstrlen(text))
	311	End Function
[1]	312
[132]	313	Const Function Insert(startIndex As Long, text As *Char, length As Long) As String
	314	If startIndex < 0 Or startIndex > m_Length Or length < 0 Then
	315	Debug 'ArgumentOutOfRangeException
[1]	316
[132]	317	End If
	318	Insert.ReSize(m_Length + length)
	319	memcpy(Insert.Chars, Chars, SizeOf (Char) * startIndex)
	320	memcpy(VarPtr(Insert.Chars[startIndex]), text, SizeOf (Char) * length)
	321	memcpy(VarPtr(Insert.Chars[startIndex + length]), VarPtr(Chars[startIndex]), SizeOf (Char) * (m_Length - startIndex + 1))
[1]	322	End Function
	323
[132]	324	Const Function SubString(startIndex As Long) As String
[30]	325	Return SubString(startIndex, m_Length - startIndex)
[1]	326	End Function
	327
[132]	328	Const Function SubString(startIndex As Long, length As Long) As String
[1]	329	If startIndex < 0 Or length <= 0 Then Return ""
[30]	330	If startIndex + length > m_Length Then Return ""
[1]	331
	332	Dim temp As String
	333	temp.AllocStringBuffer(length)
[121]	334	memcpy(temp.Chars, VarPtr(Chars[startIndex]), SizeOf (Char) * length)
[31]	335	Chars[m_Length] = 0
[1]	336	Return temp
	337	End Function
	338
[132]	339	Const Function Remove(startIndex As Long) As String
	340	Remove.ReSize(startIndex)
	341	memcpy(Remove.Chars, This.Chars, SizeOf (Char) * startIndex)
[1]	342	End Function
	343
[132]	344	Const Function Remove(startIndex As Long, count As Long) As String
	345	Remove.ReSize(m_Length - count)
	346	memcpy(Remove.Chars, This.Chars, SizeOf (Char) * startIndex)
	347	memcpy(VarPtr(Remove.Chars[startIndex]), VarPtr(This.Chars[startIndex + count]), SizeOf (Char) * startIndex)
	348	End Function
	349	/*
	350	Static Function IsNullOrEmpty(s As String) As Boolean
	351	If s <> Nothing Then
	352	If s.m_Length > 0 Then
	353	Return True
	354	End If
	355	End If
	356	Return False
	357	End Function
	358	*/
	359	Const Function Replace(oldChar As Char, newChar As Char) As String
	360	Replace = Copy(This)
	361	With Replace
	362	Dim i As Long
	363	For i = 0 To ELM(.m_Length)
	364	If .Chars[i] = .oldChar Then
	365	.Chars[i] = .newChar
	366	End If
	367	Next
	368	End With
	369	End Function
[1]	370
[132]	371	Const Function Replace(ByRef oldStr As String, ByRef newStr As String) As String
	372	' If oldStr = Nothing Then Throw ArgumentNullException
	373	'
	374	' If newStr = Nothing Then
	375	' Return ReplaceCore(oldStr, oldStr.m_Length, "", 0)
	376	' Else
	377	Return ReplaceCore(oldStr, oldStr.m_Length, newStr, newStr.m_Length)
	378	' End If
	379	End Function
[1]	380
[132]	381	Const Function Replace(oldStr As Char, newStr As Char)
	382	If oldStr = 0 Then Debug 'Throw ArgumentNullException
	383	If newStr = 0 Then newStr = ""
	384	Return ReplaceCore(oldStr, lstrlen(oldStr), newStr, lstrlen(newStr)) As String
[1]	385	End Function
	386
[132]	387	Const Function Replace(oldStr As Char, oldLen As Long, newStr As Char, newLen As Long) As String
	388	If oldStr = 0 Then Debug 'Throw ArgumentNullException
	389	If newStr = 0 Then
	390	newStr = ""
	391	newLen = 0
[1]	392	End If
[132]	393	Return ReplaceCore(oldStr, oldLen, newStr, newLen)
[1]	394	End Function
	395
	396	Sub ToLower()
[125]	397	Dim i As Long
	398	For i = 0 To m_Length
	399	Chars[i] = _System_ASCII_ToLower(Chars[i])
	400	Next
[1]	401	End Sub
	402
	403	Sub ToUpper()
[125]	404	Dim i As Long
	405	For i = 0 To m_Length
	406	Chars[i] = _System_ASCII_ToUpper(Chars[i])
	407	Next
[1]	408	End Sub
	409
	410	Sub Swap(ByRef x As String)
	411	Dim tempLen As Long
[132]	412	Dim tempChars As *Char
[30]	413	tempLen = x.m_Length
[31]	414	tempChars = x.Chars
[30]	415	x.m_Length = This.m_Length
[31]	416	x.Chars = This.Chars
[30]	417	This.m_Length = tempLen
[31]	418	This.Chars = tempChars
[1]	419	End Sub
	420
[119]	421	Override Function ToString() As String
	422	Return This
	423	End Function
	424
[132]	425	Static Function Copy(s As String) As String
	426	Copy.Resize(s.m_Length)
	427	memcpy(Copy.Chars, This.Chars, SizeOf (Char) * m_Length)
	428	End Function
	429
[1]	430	Private
	431	' メモリ確保に失敗すると元の文字列は失われない。（例外安全でいう強い保障）
[119]	432	Function AllocStringBuffer(textLength As Long) As *Char
[1]	433	If textLength < 0 Then
	434	Return 0
[30]	435	ElseIf textLength > m_Length Then
[121]	436	AllocStringBuffer = _System_realloc(Chars, SizeOf(Char) * (textLength + 1))
[1]	437	If AllocStringBuffer <> 0 Then
[30]	438	m_Length = textLength
[31]	439	Chars = AllocStringBuffer
[1]	440	End If
	441	Else
[30]	442	m_Length = textLength
[31]	443	AllocStringBuffer = Chars
[1]	444	End If
	445	End Function
	446
[132]	447	Function ReplaceCore(oldStr As Char, oldLen As Long, newStr As Char, newLen As Long) As String
	448	If oldLen = 0 Then
	449	Debug 'Throw ArgumentException
	450	End If
	451	Dim tmp As String
	452	With tmp
	453	Dim current = 0 As Long
	454	Do
	455	Dim pos = IndexOf(oldStr, current)
	456	If pos = -1 Then
	457	Exit Do
	458	End If
	459	.Append(VarPtr(Chars[current]), pos - current)
	460	.Append(newStr, newLen)
	461	current = pos + oldLen
	462	Loop
	463	.Append(VarPtr(Chars[current]), m_Length - current)
	464	End With
	465	Return tmp
	466	End Function
	467
[1]	468	End Class
	469

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