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authorMike Buland <eichlan@xagasoft.com>2012-03-25 20:00:08 +0000
committerMike Buland <eichlan@xagasoft.com>2012-03-25 20:00:08 +0000
commit469bbcf0701e1eb8a6670c23145b0da87357e178 (patch)
treeb5b062a16e46a6c5d3410b4e574cd0cc09057211 /src/buffer.cpp
parentee1b79396076edc4e30aefb285fada03bb45e80d (diff)
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Code is all reorganized. We're about ready to release. I should write up a
little explenation of the arrangement.
Diffstat (limited to 'src/buffer.cpp')
-rw-r--r--src/buffer.cpp168
1 files changed, 0 insertions, 168 deletions
diff --git a/src/buffer.cpp b/src/buffer.cpp
deleted file mode 100644
index 47fab70..0000000
--- a/src/buffer.cpp
+++ /dev/null
@@ -1,168 +0,0 @@
1/*
2 * Copyright (C) 2007-2011 Xagasoft, All rights reserved.
3 *
4 * This file is part of the libbu++ library and is released under the
5 * terms of the license contained in the file LICENSE.
6 */
7
8#include "bu/buffer.h"
9
10Bu::Buffer::Buffer( Bu::Stream &rNext, int iWhat, int iBufSize ) :
11 Bu::Filter( rNext ),
12 sSoFar( 0 ),
13 iBufSize( iBufSize ),
14 sReadBuf( NULL ),
15 sWriteBuf( NULL ),
16 iReadBufFill( 0 ),
17 iReadPos( 0 ),
18 iWriteBufFill( 0 ),
19 iWritePos( 0 ),
20 iWhat( iWhat )
21{
22 sReadBuf = new char[iBufSize];
23 sWriteBuf = new char[iBufSize];
24}
25
26Bu::Buffer::~Buffer()
27{
28 delete[] sReadBuf;
29 delete[] sWriteBuf;
30}
31
32void Bu::Buffer::start()
33{
34}
35
36Bu::size Bu::Buffer::stop()
37{
38 iReadBufFill = iReadPos = iWriteBufFill = iWritePos = 0;
39 return sSoFar;
40}
41
42void Bu::Buffer::fillReadBuf()
43{
44 if( iReadBufFill+iReadPos < iBufSize )
45 {
46 iReadBufFill += rNext.read(
47 sReadBuf+iReadPos+iReadBufFill,
48 iBufSize-iReadBufFill-iReadPos
49 );
50 }
51}
52
53Bu::size Bu::Buffer::read( void *pBuf, Bu::size nBytes )
54{
55 if( (iWhat&Read) == 0 )
56 return rNext.read( pBuf, nBytes );
57
58 if( nBytes <= 0 )
59 {
60 fillReadBuf();
61 return 0;
62 }
63
64 Bu::size nTotRead = 0;
65// fillReadBuf();
66
67 do
68 {
69 int iAmnt = nBytes-nTotRead;
70 if( iAmnt > iReadBufFill )
71 {
72 iAmnt = iReadBufFill;
73 }
74 if( iAmnt > 0 )
75 {
76 memcpy( ((char *)pBuf)+nTotRead, sReadBuf+iReadPos, iAmnt );
77 iReadPos += iAmnt;
78 nTotRead += iAmnt;
79 iReadBufFill -= iAmnt;
80 }
81 if( iReadBufFill == 0 )
82 {
83 iReadPos = 0;
84 fillReadBuf();
85 }
86 }
87 while( nTotRead < nBytes && iReadBufFill > 0 );
88
89 //printf("Buffer: %db returned, %db remain in buffer.\n", nTotRead, iReadBufFill );
90
91 return nTotRead;
92}
93
94Bu::size Bu::Buffer::write( const void *pBuf, Bu::size nBytes )
95{
96 if( (iWhat&Write) == 0 )
97 return rNext.write( pBuf, nBytes );
98
99 Bu::size nTotWrote = 0;
100
101 do
102 {
103 int iAmnt = nBytes-nTotWrote;
104 if( iAmnt > iBufSize-iWritePos-iWriteBufFill )
105 {
106 iAmnt = iBufSize-iWritePos-iWriteBufFill;
107 }
108 if( iAmnt > 0 )
109 {
110 memcpy(
111 sWriteBuf+iWritePos+iWriteBufFill,
112 ((char *)pBuf)+nTotWrote,
113 iAmnt
114 );
115 nTotWrote += iAmnt;
116 iWriteBufFill += iAmnt;
117 //printf("Buffer: Moved %db to write buffer, %db filled now.\n",
118 //iAmnt, iWriteBufFill );
119 }
120 while( iWritePos+iWriteBufFill == iBufSize )
121 {
122 //printf("iWritePos = %d\n", iWritePos );
123 int iWr = rNext.write( sWriteBuf+iWritePos, iWriteBufFill );
124 //printf("Buffer: Wrote %db from buffer to stream, %db filled now.\n", iWr, iWriteBufFill-iWr );
125 if( iWr == 0 )
126 {
127 return nTotWrote;
128 }
129 else if( iWr == iWriteBufFill )
130 {
131 iWritePos = iWriteBufFill = 0;
132 }
133 else
134 {
135 iWritePos += iWr;
136 iWriteBufFill -= iWr;
137 }
138 }
139 }
140 while( nTotWrote < nBytes && iWriteBufFill < iBufSize+iWritePos );
141
142 return nTotWrote;
143}
144
145void Bu::Buffer::flush()
146{
147 if( (iWhat&Write) == 0 )
148 return rNext.flush();
149
150 if( iWriteBufFill > 0 )
151 {
152 //printf("Buffer: Flushing remaining data, %db.\n", iWriteBufFill );
153 int iWr = 0;
154 do
155 {
156 iWr = rNext.write( sWriteBuf+iWritePos, iWriteBufFill );
157 //printf("Buffer: %db written to stream.\n", iWr );
158 iWritePos += iWr;
159 iWriteBufFill -= iWr;
160 } while( iWriteBufFill > 0 && iWr > 0 );
161 }
162}
163
164bool Bu::Buffer::isEos()
165{
166 return (iReadPos >= (iReadBufFill-1)) && (rNext.isEos());
167}
168