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-rw-r--r--src/buffer.cpp120
-rw-r--r--src/buffer.h15
-rw-r--r--src/bzip2.cpp2
-rw-r--r--src/tests/buffer.cpp38
4 files changed, 172 insertions, 3 deletions
diff --git a/src/buffer.cpp b/src/buffer.cpp
index fef64b1..5e7fb9a 100644
--- a/src/buffer.cpp
+++ b/src/buffer.cpp
@@ -1,18 +1,31 @@
1/*
2 * Copyright (C) 2007-2008 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
1#include "bu/buffer.h" 8#include "bu/buffer.h"
2 9
3Bu::Buffer::Buffer( Bu::Stream &rNext, int iBufsize ) : 10Bu::Buffer::Buffer( Bu::Stream &rNext, int iBufSize ) :
4 Bu::Filter( rNext ), 11 Bu::Filter( rNext ),
5 sSoFar( 0 ), 12 sSoFar( 0 ),
6 iBufSize( iBufSize ), 13 iBufSize( iBufSize ),
7 sReadBuf( NULL ), 14 sReadBuf( NULL ),
8 sWriteBuf( NULL ), 15 sWriteBuf( NULL ),
9 iReadBufFill( 0 ), 16 iReadBufFill( 0 ),
10 iWriteBufFill( 0 ) 17 iReadPos( 0 ),
18 iWriteBufFill( 0 ),
19 iWritePos( 0 )
11{ 20{
21 sReadBuf = new char[iBufSize];
22 sWriteBuf = new char[iBufSize];
12} 23}
13 24
14Bu::Buffer::~Buffer() 25Bu::Buffer::~Buffer()
15{ 26{
27 delete[] sReadBuf;
28 delete[] sWriteBuf;
16} 29}
17 30
18void Bu::Buffer::start() 31void Bu::Buffer::start()
@@ -23,15 +36,118 @@ size_t Bu::Buffer::stop()
23{ 36{
24} 37}
25 38
39void Bu::Buffer::fillReadBuf()
40{
41 if( iReadBufFill+iReadPos < iBufSize )
42 {
43 printf("Buffer: Attempting to read %db.\n", iBufSize-iReadBufFill-iReadPos );
44 iReadBufFill += rNext.read(
45 sReadBuf+iReadPos+iReadBufFill,
46 iBufSize-iReadBufFill-iReadPos
47 );
48 printf("Buffer: Read from stream, %db now in buffer.\n", iReadBufFill );
49 }
50}
51
26size_t Bu::Buffer::read( void *pBuf, size_t nBytes ) 52size_t Bu::Buffer::read( void *pBuf, size_t nBytes )
27{ 53{
54 if( nBytes <= 0 )
55 {
56 fillReadBuf();
57 return 0;
58 }
59
60 size_t nTotRead = 0;
61// fillReadBuf();
62
63 do
64 {
65 int iAmnt = nBytes-nTotRead;
66 if( iAmnt > iReadBufFill )
67 {
68 iAmnt = iReadBufFill;
69 }
70 if( iAmnt > 0 )
71 {
72 memcpy( ((char *)pBuf)+nTotRead, sReadBuf+iReadPos, iAmnt );
73 iReadPos += iAmnt;
74 nTotRead += iAmnt;
75 iReadBufFill -= iAmnt;
76 }
77 if( iReadBufFill == 0 )
78 {
79 iReadPos = 0;
80 fillReadBuf();
81 }
82 }
83 while( nTotRead < nBytes && iReadBufFill > 0 );
84
85 printf("Buffer: %db returned, %db remain in buffer.\n", nTotRead, iReadBufFill );
86
87 return nTotRead;
28} 88}
29 89
30size_t Bu::Buffer::write( const void *pBuf, size_t nBytes ) 90size_t Bu::Buffer::write( const void *pBuf, size_t nBytes )
31{ 91{
92 size_t nTotWrote = 0;
93
94 do
95 {
96 int iAmnt = nBytes-nTotWrote;
97 if( iAmnt > iBufSize-iWritePos-iWriteBufFill )
98 {
99 iAmnt = iBufSize-iWritePos-iWriteBufFill;
100 }
101 if( iAmnt > 0 )
102 {
103 memcpy(
104 sWriteBuf+iWritePos+iWriteBufFill,
105 ((char *)pBuf)+nTotWrote,
106 iAmnt
107 );
108 nTotWrote += iAmnt;
109 iWriteBufFill += iAmnt;
110 printf("Buffer: Moved %db to write buffer, %db filled now.\n",
111 iAmnt, iWriteBufFill );
112 }
113 while( iWritePos+iWriteBufFill == iBufSize )
114 {
115 printf("iWritePos = %d\n", iWritePos );
116 int iWr = rNext.write( sWriteBuf+iWritePos, iWriteBufFill );
117 printf("Buffer: Wrote %db from buffer to stream, %db filled now.\n", iWr, iWriteBufFill-iWr );
118 if( iWr == 0 )
119 {
120 return nTotWrote;
121 }
122 else if( iWr == iWriteBufFill )
123 {
124 iWritePos = iWriteBufFill = 0;
125 }
126 else
127 {
128 iWritePos += iWr;
129 iWriteBufFill -= iWr;
130 }
131 }
132 }
133 while( nTotWrote < nBytes && iWriteBufFill < iBufSize+iWritePos );
134
135 return nTotWrote;
32} 136}
33 137
34void Bu::Buffer::flush() 138void Bu::Buffer::flush()
35{ 139{
140 if( iWriteBufFill > 0 )
141 {
142 printf("Buffer: Flushing remaining data, %db.\n", iWriteBufFill );
143 int iWr = 0;
144 do
145 {
146 iWr = rNext.write( sWriteBuf+iWritePos, iWriteBufFill );
147 printf("Buffer: %db written to stream.\n", iWr );
148 iWritePos += iWr;
149 iWriteBufFill -= iWr;
150 } while( iWriteBufFill > 0 && iWr > 0 );
151 }
36} 152}
37 153
diff --git a/src/buffer.h b/src/buffer.h
index beb4b08..a18be11 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -1,3 +1,10 @@
1/*
2 * Copyright (C) 2007-2008 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
1#ifndef BU_BUFFER_H 8#ifndef BU_BUFFER_H
2#define BU_BUFFER_H 9#define BU_BUFFER_H
3 10
@@ -18,15 +25,23 @@ namespace Bu
18 virtual size_t write( const void *pBuf, size_t nBytes ); 25 virtual size_t write( const void *pBuf, size_t nBytes );
19 using Stream::write; 26 using Stream::write;
20 27
28 size_t getReadFill() { return iReadBufFill; }
29 bool isWritePending() { return iWriteBufFill > 0; }
30
21 virtual void flush(); 31 virtual void flush();
22 32
23 private: 33 private:
34 void fillReadBuf();
35
36 private:
24 size_t sSoFar; 37 size_t sSoFar;
25 int iBufSize; 38 int iBufSize;
26 char *sReadBuf; 39 char *sReadBuf;
27 char *sWriteBuf; 40 char *sWriteBuf;
28 int iReadBufFill; 41 int iReadBufFill;
42 int iReadPos;
29 int iWriteBufFill; 43 int iWriteBufFill;
44 int iWritePos;
30 }; 45 };
31}; 46};
32 47
diff --git a/src/bzip2.cpp b/src/bzip2.cpp
index 10cfe8a..0a56f83 100644
--- a/src/bzip2.cpp
+++ b/src/bzip2.cpp
@@ -200,7 +200,7 @@ size_t Bu::BZip2::write( const void *pData, size_t nBytes )
200 break; 200 break;
201 } 201 }
202 202
203 return sTotalOut; 203 return nBytes;
204} 204}
205 205
206bool Bu::BZip2::isOpen() 206bool Bu::BZip2::isOpen()
diff --git a/src/tests/buffer.cpp b/src/tests/buffer.cpp
new file mode 100644
index 0000000..a1a1105
--- /dev/null
+++ b/src/tests/buffer.cpp
@@ -0,0 +1,38 @@
1#include "bu/membuf.h"
2#include "bu/buffer.h"
3#include "bu/file.h"
4
5using namespace Bu;
6
7int main( int argc, char *argv[] )
8{
9 argc--,argv++;
10 if( argc == 0 )
11 {
12 MemBuf mOut;
13 Buffer bOut( mOut, 10 );
14
15 for( int j = 0; j < 4; j++ )
16 bOut.write("hi ", 3 );
17
18 printf("Preflush: \"%s\"\n", mOut.getString().getStr() );
19 bOut.flush();
20
21 printf("Final: \"%s\"\n", mOut.getString().getStr() );
22 }
23 else
24 {
25 File fIn( *argv, File::Read );
26 Buffer bIn( fIn, 10 );
27
28 char buf[5];
29 for( int j = 0; j < 5; j++ )
30 {
31 buf[bIn.read( buf, 4 )] = '\0';
32 printf("Four chars: \"%s\"\n", buf );
33 }
34 }
35
36 return 0;
37}
38