reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 1 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 2 | * Copyright 2011 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 8 | #include "SkData.h" |
commit-bot@chromium.org | 97de357 | 2014-05-29 20:13:22 +0000 | [diff] [blame] | 9 | #include "SkLazyPtr.h" |
| 10 | #include "SkOSFile.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 11 | #include "SkReadBuffer.h" |
reed | 9594da1 | 2014-09-12 12:12:27 -0700 | [diff] [blame] | 12 | #include "SkStream.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 13 | #include "SkWriteBuffer.h" |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 14 | |
| 15 | SkData::SkData(const void* ptr, size_t size, ReleaseProc proc, void* context) { |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 16 | fPtr = const_cast<void*>(ptr); |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 17 | fSize = size; |
| 18 | fReleaseProc = proc; |
| 19 | fReleaseProcContext = context; |
| 20 | } |
| 21 | |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 22 | // This constructor means we are inline with our fPtr's contents. Thus we set fPtr |
| 23 | // to point right after this. We also set our releaseproc to sk_inplace_sentinel_releaseproc, |
| 24 | // since we need to handle "delete" ourselves. See internal_displose(). |
| 25 | // |
| 26 | SkData::SkData(size_t size) { |
| 27 | fPtr = (char*)(this + 1); // contents are immediately after this |
| 28 | fSize = size; |
bsalomon | 0728031 | 2014-11-20 08:02:46 -0800 | [diff] [blame] | 29 | fReleaseProc = NULL; |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 30 | fReleaseProcContext = NULL; |
| 31 | } |
| 32 | |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 33 | SkData::~SkData() { |
| 34 | if (fReleaseProc) { |
| 35 | fReleaseProc(fPtr, fSize, fReleaseProcContext); |
| 36 | } |
| 37 | } |
| 38 | |
reed@google.com | dbc936d | 2012-06-28 15:40:09 +0000 | [diff] [blame] | 39 | bool SkData::equals(const SkData* other) const { |
| 40 | if (NULL == other) { |
| 41 | return false; |
| 42 | } |
| 43 | |
| 44 | return fSize == other->fSize && !memcmp(fPtr, other->fPtr, fSize); |
| 45 | } |
| 46 | |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 47 | size_t SkData::copyRange(size_t offset, size_t length, void* buffer) const { |
| 48 | size_t available = fSize; |
| 49 | if (offset >= available || 0 == length) { |
| 50 | return 0; |
| 51 | } |
| 52 | available -= offset; |
| 53 | if (length > available) { |
| 54 | length = available; |
| 55 | } |
| 56 | SkASSERT(length > 0); |
| 57 | |
| 58 | memcpy(buffer, this->bytes() + offset, length); |
| 59 | return length; |
| 60 | } |
| 61 | |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 62 | SkData* SkData::PrivateNewWithCopy(const void* srcOrNull, size_t length) { |
| 63 | if (0 == length) { |
| 64 | return SkData::NewEmpty(); |
| 65 | } |
| 66 | char* storage = (char*)sk_malloc_throw(sizeof(SkData) + length); |
| 67 | SkData* data = new (storage) SkData(length); |
| 68 | if (srcOrNull) { |
| 69 | memcpy(data->writable_data(), srcOrNull, length); |
| 70 | } |
| 71 | return data; |
| 72 | } |
| 73 | |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 74 | /////////////////////////////////////////////////////////////////////////////// |
| 75 | |
mtklein | 148ec59 | 2014-10-13 13:17:56 -0700 | [diff] [blame] | 76 | // As a template argument these must have external linkage. |
| 77 | SkData* sk_new_empty_data() { return new SkData(NULL, 0, NULL, NULL); } |
| 78 | namespace { void sk_unref_data(SkData* ptr) { return SkSafeUnref(ptr); } } |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 79 | |
mtklein | 148ec59 | 2014-10-13 13:17:56 -0700 | [diff] [blame] | 80 | SK_DECLARE_STATIC_LAZY_PTR(SkData, empty, sk_new_empty_data, sk_unref_data); |
commit-bot@chromium.org | 1f81fd6 | 2013-10-23 14:44:08 +0000 | [diff] [blame] | 81 | |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 82 | SkData* SkData::NewEmpty() { |
commit-bot@chromium.org | 97de357 | 2014-05-29 20:13:22 +0000 | [diff] [blame] | 83 | return SkRef(empty.get()); |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | // assumes fPtr was allocated via sk_malloc |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 87 | static void sk_free_releaseproc(const void* ptr, size_t, void*) { |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 88 | sk_free((void*)ptr); |
| 89 | } |
| 90 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 91 | SkData* SkData::NewFromMalloc(const void* data, size_t length) { |
| 92 | return new SkData(data, length, sk_free_releaseproc, NULL); |
| 93 | } |
| 94 | |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 95 | SkData* SkData::NewWithCopy(const void* src, size_t length) { |
| 96 | SkASSERT(src); |
| 97 | return PrivateNewWithCopy(src, length); |
| 98 | } |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 99 | |
reed | 33a3050 | 2014-09-11 08:42:36 -0700 | [diff] [blame] | 100 | SkData* SkData::NewUninitialized(size_t length) { |
| 101 | return PrivateNewWithCopy(NULL, length); |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | SkData* SkData::NewWithProc(const void* data, size_t length, |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 105 | ReleaseProc proc, void* context) { |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 106 | return new SkData(data, length, proc, context); |
| 107 | } |
| 108 | |
bungeman@google.com | 6cab1a4 | 2013-05-29 13:43:31 +0000 | [diff] [blame] | 109 | // assumes fPtr was allocated with sk_fmmap |
| 110 | static void sk_mmap_releaseproc(const void* addr, size_t length, void*) { |
| 111 | sk_fmunmap(addr, length); |
| 112 | } |
| 113 | |
| 114 | SkData* SkData::NewFromFILE(SkFILE* f) { |
| 115 | size_t size; |
| 116 | void* addr = sk_fmmap(f, &size); |
| 117 | if (NULL == addr) { |
| 118 | return NULL; |
| 119 | } |
| 120 | |
| 121 | return SkData::NewWithProc(addr, size, sk_mmap_releaseproc, NULL); |
| 122 | } |
| 123 | |
mike@reedtribe.org | 792bbd1 | 2013-06-11 02:20:28 +0000 | [diff] [blame] | 124 | SkData* SkData::NewFromFileName(const char path[]) { |
| 125 | SkFILE* f = path ? sk_fopen(path, kRead_SkFILE_Flag) : NULL; |
| 126 | if (NULL == f) { |
| 127 | return NULL; |
| 128 | } |
| 129 | SkData* data = NewFromFILE(f); |
| 130 | sk_fclose(f); |
| 131 | return data; |
| 132 | } |
| 133 | |
bungeman@google.com | 11c9a55 | 2013-06-03 17:10:35 +0000 | [diff] [blame] | 134 | SkData* SkData::NewFromFD(int fd) { |
| 135 | size_t size; |
| 136 | void* addr = sk_fdmmap(fd, &size); |
| 137 | if (NULL == addr) { |
| 138 | return NULL; |
| 139 | } |
| 140 | |
| 141 | return SkData::NewWithProc(addr, size, sk_mmap_releaseproc, NULL); |
| 142 | } |
| 143 | |
reed@google.com | 3a31ac1 | 2011-06-24 13:11:05 +0000 | [diff] [blame] | 144 | // assumes context is a SkData |
| 145 | static void sk_dataref_releaseproc(const void*, size_t, void* context) { |
| 146 | SkData* src = reinterpret_cast<SkData*>(context); |
| 147 | src->unref(); |
| 148 | } |
| 149 | |
| 150 | SkData* SkData::NewSubset(const SkData* src, size_t offset, size_t length) { |
| 151 | /* |
| 152 | We could, if we wanted/need to, just make a deep copy of src's data, |
| 153 | rather than referencing it. This would duplicate the storage (of the |
| 154 | subset amount) but would possibly allow src to go out of scope sooner. |
| 155 | */ |
| 156 | |
| 157 | size_t available = src->size(); |
| 158 | if (offset >= available || 0 == length) { |
| 159 | return SkData::NewEmpty(); |
| 160 | } |
| 161 | available -= offset; |
| 162 | if (length > available) { |
| 163 | length = available; |
| 164 | } |
| 165 | SkASSERT(length > 0); |
| 166 | |
| 167 | src->ref(); // this will be balanced in sk_dataref_releaseproc |
| 168 | return new SkData(src->bytes() + offset, length, sk_dataref_releaseproc, |
| 169 | const_cast<SkData*>(src)); |
| 170 | } |
| 171 | |
reed@google.com | dbc936d | 2012-06-28 15:40:09 +0000 | [diff] [blame] | 172 | SkData* SkData::NewWithCString(const char cstr[]) { |
reed@google.com | fd59d12 | 2012-07-02 20:28:31 +0000 | [diff] [blame] | 173 | size_t size; |
| 174 | if (NULL == cstr) { |
| 175 | cstr = ""; |
| 176 | size = 1; |
reed@google.com | dbc936d | 2012-06-28 15:40:09 +0000 | [diff] [blame] | 177 | } else { |
reed@google.com | fd59d12 | 2012-07-02 20:28:31 +0000 | [diff] [blame] | 178 | size = strlen(cstr) + 1; |
reed@google.com | dbc936d | 2012-06-28 15:40:09 +0000 | [diff] [blame] | 179 | } |
reed@google.com | fd59d12 | 2012-07-02 20:28:31 +0000 | [diff] [blame] | 180 | return NewWithCopy(cstr, size); |
reed@google.com | dbc936d | 2012-06-28 15:40:09 +0000 | [diff] [blame] | 181 | } |
reed | 9594da1 | 2014-09-12 12:12:27 -0700 | [diff] [blame] | 182 | |
| 183 | /////////////////////////////////////////////////////////////////////////////// |
| 184 | |
| 185 | SkData* SkData::NewFromStream(SkStream* stream, size_t size) { |
| 186 | SkAutoDataUnref data(SkData::NewUninitialized(size)); |
| 187 | if (stream->read(data->writable_data(), size) != size) { |
| 188 | return NULL; |
| 189 | } |
| 190 | return data.detach(); |
| 191 | } |
| 192 | |