1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 // Copyright (C) 2009-2011, International Business Machines
4 // Corporation and others. All Rights Reserved.
5 //
6 // Copyright 2007 Google Inc. All Rights Reserved.
7 // Author: sanjay@google.com (Sanjay Ghemawat)
8
9 #include "unicode/utypes.h"
10 #include "unicode/bytestream.h"
11 #include "cmemory.h"
12
13 U_NAMESPACE_BEGIN
14
~ByteSink()15 ByteSink::~ByteSink() {}
16
GetAppendBuffer(int32_t min_capacity,int32_t,char * scratch,int32_t scratch_capacity,int32_t * result_capacity)17 char* ByteSink::GetAppendBuffer(int32_t min_capacity,
18 int32_t /*desired_capacity_hint*/,
19 char* scratch, int32_t scratch_capacity,
20 int32_t* result_capacity) {
21 if (min_capacity < 1 || scratch_capacity < min_capacity) {
22 *result_capacity = 0;
23 return NULL;
24 }
25 *result_capacity = scratch_capacity;
26 return scratch;
27 }
28
Flush()29 void ByteSink::Flush() {}
30
CheckedArrayByteSink(char * outbuf,int32_t capacity)31 CheckedArrayByteSink::CheckedArrayByteSink(char* outbuf, int32_t capacity)
32 : outbuf_(outbuf), capacity_(capacity < 0 ? 0 : capacity),
33 size_(0), appended_(0), overflowed_(FALSE) {
34 }
35
~CheckedArrayByteSink()36 CheckedArrayByteSink::~CheckedArrayByteSink() {}
37
Reset()38 CheckedArrayByteSink& CheckedArrayByteSink::Reset() {
39 size_ = appended_ = 0;
40 overflowed_ = FALSE;
41 return *this;
42 }
43
Append(const char * bytes,int32_t n)44 void CheckedArrayByteSink::Append(const char* bytes, int32_t n) {
45 if (n <= 0) {
46 return;
47 }
48 appended_ += n;
49 int32_t available = capacity_ - size_;
50 if (n > available) {
51 n = available;
52 overflowed_ = TRUE;
53 }
54 if (n > 0 && bytes != (outbuf_ + size_)) {
55 uprv_memcpy(outbuf_ + size_, bytes, n);
56 }
57 size_ += n;
58 }
59
GetAppendBuffer(int32_t min_capacity,int32_t,char * scratch,int32_t scratch_capacity,int32_t * result_capacity)60 char* CheckedArrayByteSink::GetAppendBuffer(int32_t min_capacity,
61 int32_t /*desired_capacity_hint*/,
62 char* scratch,
63 int32_t scratch_capacity,
64 int32_t* result_capacity) {
65 if (min_capacity < 1 || scratch_capacity < min_capacity) {
66 *result_capacity = 0;
67 return NULL;
68 }
69 int32_t available = capacity_ - size_;
70 if (available >= min_capacity) {
71 *result_capacity = available;
72 return outbuf_ + size_;
73 } else {
74 *result_capacity = scratch_capacity;
75 return scratch;
76 }
77 }
78
79 U_NAMESPACE_END
80