xref: /trunk/main/sal/rtl/source/strbuf.c (revision 647f063d)
1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 
23 
24 #include <osl/interlck.h>
25 
26 #ifndef _RTL_STRING_HXX_
27 #include <rtl/strbuf.hxx>
28 #endif
29 #include <rtl/memory.h>
30 
31 /*
32 #include <rtl/alloc.h>
33 */
34 
35 
36 
37 /*************************************************************************
38  *	rtl_stringbuffer_newFromStr_WithLength
39  */
rtl_stringbuffer_newFromStr_WithLength(rtl_String ** newStr,const sal_Char * value,sal_Int32 count)40 void SAL_CALL rtl_stringbuffer_newFromStr_WithLength( rtl_String ** newStr,
41 													  const sal_Char * value,
42 													  sal_Int32 count )
43 {
44 	if (!value)
45 	{
46 		rtl_string_new_WithLength( newStr, 16 );
47 		return;
48 	}
49 
50 	rtl_string_new_WithLength( newStr, count + 16 );
51 	(*newStr)->length = count;
52 	rtl_copyMemory( (*newStr)->buffer, value, count );
53 	return;
54 }
55 
56 /*************************************************************************
57  *	rtl_stringbuffer_newFromStringBuffer
58  */
rtl_stringbuffer_newFromStringBuffer(rtl_String ** newStr,sal_Int32 capacity,rtl_String * oldStr)59 sal_Int32 SAL_CALL rtl_stringbuffer_newFromStringBuffer( rtl_String ** newStr,
60 														 sal_Int32 capacity,
61 													     rtl_String * oldStr )
62 {
63 	sal_Int32 newCapacity = capacity;
64 
65 	if (newCapacity < oldStr->length)
66 		newCapacity = oldStr->length;
67 
68 	rtl_string_new_WithLength( newStr, newCapacity );
69     if (oldStr->length > 0) {
70         (*newStr)->length = oldStr->length;
71         rtl_copyMemory( (*newStr)->buffer, oldStr->buffer, oldStr->length );
72     }
73 	return newCapacity;
74 }
75 
76 /*************************************************************************
77  *	rtl_stringbuffer_ensureCapacity
78  */
rtl_stringbuffer_ensureCapacity(rtl_String ** This,sal_Int32 * capacity,sal_Int32 minimumCapacity)79 void SAL_CALL rtl_stringbuffer_ensureCapacity
80 	(rtl_String ** This, sal_Int32* capacity, sal_Int32 minimumCapacity)
81 {
82 	if (minimumCapacity > *capacity)
83 	{
84 		rtl_String * pTmp = *This;
85 		rtl_String * pNew = NULL;
86 		*capacity = ((*This)->length + 1) * 2;
87 		if (minimumCapacity > *capacity)
88 			/* still lower, set to the minimum capacity */
89 			*capacity = minimumCapacity;
90 
91 		rtl_string_new_WithLength(&pNew, *capacity);
92 		pNew->length = (*This)->length;
93 		*This = pNew;
94 
95 		rtl_copyMemory( (*This)->buffer, pTmp->buffer, pTmp->length );
96 		rtl_string_release( pTmp );
97 	}
98 }
99 
100 /*************************************************************************
101  *	rtl_stringbuffer_insert
102  */
rtl_stringbuffer_insert(rtl_String ** This,sal_Int32 * capacity,sal_Int32 offset,const sal_Char * str,sal_Int32 len)103 void SAL_CALL rtl_stringbuffer_insert( rtl_String ** This,
104 									   sal_Int32 * capacity,
105 									   sal_Int32 offset,
106 									   const sal_Char * str,
107 									   sal_Int32 len )
108 {
109 	sal_Int32 nOldLen;
110 	sal_Char * pBuf;
111 	sal_Int32 n;
112 	if( len != 0 )
113 	{
114 		if (*capacity < (*This)->length + len)
115 			rtl_stringbuffer_ensureCapacity( This, capacity, (*This)->length + len );
116 
117 		/*
118 		if( len == 1 )
119 			This->buffer
120 		*/
121 		nOldLen = (*This)->length;
122 		pBuf = (*This)->buffer;
123 
124 		/* copy the tail */
125 		n = (nOldLen - offset);
126 		if( n == 1 )
127             /* optimized for 1 character */
128 			pBuf[offset + len] = pBuf[offset];
129 		else if( n > 1 )
130 			rtl_moveMemory( pBuf + offset + len, pBuf + offset, n * sizeof(sal_Char) );
131 
132 		/* insert the new characters */
133 		n = len;
134 		if( len == 1 )
135                             /* optimized for 1 character */
136 			pBuf[offset] = *str;
137 		else if( n > 1 )
138 			rtl_copyMemory( pBuf + offset, str, len * sizeof(sal_Char) );
139 		(*This)->length = nOldLen + len;
140 		pBuf[ nOldLen + len ] = 0;
141 	}
142 }
143 
144