1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*******************************************************************************
* Goggles Audio Player Library *
********************************************************************************
* Copyright (C) 2010-2021 by Sander Jansen. All Rights Reserved *
* --- *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see http://www.gnu.org/licenses. *
********************************************************************************/
#include "ap_defs.h"
#include "ap_buffer.h"
#define ROUNDVAL 16
#define ROUNDUP(n) (((n)+ROUNDVAL-1)&-ROUNDVAL)
namespace ap {
BufferBase::BufferBase(FXival n) {
allocElms(begptr,ROUNDUP(n));
endptr=begptr+n;
wrptr=begptr;
rdptr=begptr;
}
BufferBase::~BufferBase(){
freeElms(begptr);
}
void BufferBase::adopt(BufferBase & other) {
freeElms(begptr);
begptr = other.begptr;
endptr = other.endptr;
wrptr = other.wrptr;
rdptr = other.rdptr;
other.begptr = nullptr;
other.endptr = nullptr;
other.wrptr = nullptr;
other.rdptr = nullptr;
}
void BufferBase::clear() {
wrptr=rdptr=begptr;
}
FXbool BufferBase::resize(FXival n) {
FXASSERT(n>0);
if(begptr+n!=endptr){
FXuchar *oldbegptr=begptr;
// Resize the buffer
if(!resizeElms(begptr,ROUNDUP(n))) return false;
// Adjust pointers, buffer may have moved
endptr=begptr+n;
wrptr=begptr+(wrptr-oldbegptr);
rdptr=begptr+(rdptr-oldbegptr);
if(wrptr>endptr) wrptr=endptr;
if(rdptr>endptr) rdptr=endptr;
}
return true;
}
FXbool BufferBase::reserve(FXival n) {
FXASSERT(n>0);
if (n>(endptr-wrptr)) {
if (rdptr>begptr) {
if (rdptr<wrptr) {
memmove(begptr,rdptr,wrptr-rdptr);
wrptr-=(rdptr-begptr);
rdptr=begptr;
}
else {
rdptr=wrptr=begptr;
}
if (n<=endptr-wrptr)
return true;
}
return resize((endptr-begptr)+(n-(endptr-wrptr)));
}
return true;
}
//----------------------------------------------
MemoryBuffer::MemoryBuffer(FXival cap) : BufferBase(cap) {
}
MemoryBuffer::~MemoryBuffer() {
}
void MemoryBuffer::readBytes(FXival nbytes) {
FXASSERT(nbytes<=size());
rdptr+=nbytes;
}
void MemoryBuffer::wroteBytes(FXival nbytes) {
FXASSERT(nbytes<=space());
wrptr+=nbytes;
}
void MemoryBuffer::append(const void * b,FXival nbytes) {
if (nbytes) {
reserve(nbytes);
memcpy(wrptr,b,nbytes);
wrptr+=nbytes;
}
}
void MemoryBuffer::append(const FXchar c,FXival nbytes/*=1*/) {
FXASSERT(nbytes>=1);
reserve(nbytes);
while(nbytes--) *wrptr++=c;
}
FXival MemoryBuffer::read(void * b, FXival nbytes) {
nbytes=FXMIN(size(),nbytes);
memcpy(b,rdptr,nbytes);
readBytes(nbytes);
return nbytes;
}
FXival MemoryBuffer::peek(void * b, FXival nbytes) {
nbytes=FXMIN(size(),nbytes);
memcpy(b,rdptr,nbytes);
return nbytes;
}
void MemoryBuffer::trimBegin(FXival nbytes) {
readBytes(nbytes);
}
void MemoryBuffer::trimEnd(FXival nbytes) {
FXASSERT(nbytes<=size());
wrptr-=nbytes;
}
}
|
