. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 6.5 Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . image }, }) // Create content stream. var buffer = new Buffer() buffer.writeLine("10 10 280 330 re s") buffer.writeLine("q 200 0 0 200 50 100 cm /Im0 Do Q") buffer.writeLine("BT /Tm 16 Tf 50 50 TD (Hello (Hello, world!) Tj ET") var contents = pdf.addStream(buffer) // Create page object. var page = pdf.addObject({ Type: "Page", MediaBox: [0,0,300,350], Contents: contents, Resources: resources, }) // Insert

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 6.5 Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . image }, }) // Create content stream. var buffer = new Buffer() buffer.writeLine("10 10 280 330 re s") buffer.writeLine("q 200 0 0 200 50 100 cm /Im0 Do Q") buffer.writeLine("BT /Tm 16 Tf 50 50 TD (Hello (Hello, world!) Tj ET") var contents = pdf.addStream(buffer) // Create page object. var page = pdf.addObject({ Type: "Page", MediaBox: [0,0,300,350], Contents: contents, Resources: resources, }) // Insert

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 7.5 Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . image }, }) // Create content stream. var buffer = new Buffer() buffer.writeLine("10 10 280 330 re s") buffer.writeLine("q 200 0 0 200 50 100 cm /Im0 Do Q") buffer.writeLine("BT /Tm 16 Tf 50 50 TD (Hello (Hello, world!) Tj ET") var contents = pdf.addStream(buffer) (continues on next page) 5.3. mutool 57 MuPDF Documentation, Release 1.25.0 (continued from previous page) // Create page object. var page =

new Buffer(size) o new Buffer(array) o new Buffer(str, encoding='utf8') o buffer.write(string, offset=0, encoding='utf8') o buffer.toString(encoding, start=0, end=buffer.length) o buffer[index] buffer[index] o Buffer.isBuffer(obj) o Buffer.byteLength(string, encoding='utf8') o buffer.length o buffer.copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length) o buffer.slice(start slice(start, end=buffer.length)  Streams 流  Readable Stream 可读流 o Event: 'data' 事件：'data' o Event: 'end' 事件：'end' o Event: 'error' 事件：'error' o Event: 'close' 事件：'close' o Event: 'fd' 事件：'fd'

提供了一些方法来创建、操作和接收二进制数据流。 原始的数据保存在 Buffer 类的实例中。Buffer 类似于一个整数数组，不同之处在于它和在 V8内存堆之外分配的 一段内存数据相对应。Buffer 对象的大小不能调整。你可以通过"require('buffer').Buffer"来使用这个类。 Buffer 对象是全局对象。 Buffer 和 Javascirpt 中 string 对象之间的转换需要指定编码方式。如下是 废弃， 应当尽量使用 buffer 对象。这个编码将会在未来的 node 中删除。 � new new new new Buffer(size) Buffer(size) Buffer(size) Buffer(size) 最新版文档：wiki.grati.org QQ 群：53090214 共同学习 NodeJS，欢迎加入。 4 创建指定大小的 buffer 对象。 new new new new new Buffer(array) Buffer(array) Buffer(array) Buffer(array) 从数组新建 buffer 对象。 new new new new Buffer(str, Buffer(str, Buffer(str, Buffer(str, encoding='utf8') encoding='utf8') encoding='utf8') encoding='utf8')

(alpha == 0.||K==0) return; int M4,N8=N&-8,K4; double *a_buffer = (double *)aligned_alloc(4096,K_BLOCKING*M_BLOCKING*sizeof(double)); double *b_buffer = (double *)aligned_alloc(4096,K_BLOCKING*N_BLOCKING*sizeof(double)); ING)?K_BLOCKING:K-k_count; m_inc=M>M_BLOCKING?M_BLOCKING:M; packing_a_k18(alpha,A+k_count*LDA,a_buffer,LDA,m_inc,k_inc); for (second_n_count=n_count;second_n_countbuffer+(second_n_count-n_count)*k_inc,LDB,k_inc,second_n_inc); macro_kernel_k18(a_buffer,b_buffer+(second_n_count-n_count)*k_inc,m_inc,second_n_inc,k_inc

image }, }) // Create content stream. var buffer = new Buffer() buffer.writeLine("10 10 280 330 re s") buffer.writeLine("q 200 0 0 200 50 100 cm /Im0 Do Q") buffer.writeLine("BT /Tm 16 Tf 50 50 TD (Hello (Hello, world!) Tj ET") var contents = pdf.addStream(buffer) // Create page object. var page = pdf.addObject({ Type: "Page", MediaBox: [0,0,300,350], Contents: contents, Resources: resources, }) // Insert PDFDocument() var subdoc = new Document("pdfref17.pdf") var resources = { XObject: {} } var contents = new Buffer() for (var i=0; i < 5; ++i) { var pixmap = subdoc.loadPage(1140+i).toPixmap([0.2,0,0,0.2,0,0],␣

interact with current process; extends EventEmitter require - has property cache (see next slide) Buffer - constructor function for creating objects that read and write data, especially binary data Node module work with Buffer objects Must specify encoding when converting between strings and Buffer objects 'ascii', 'base64', 'binary', 'hex', 'ucs2', 'utf8' To create a Buffer new Buffer(size-in-bytes) ) new Buffer(array) new Buffer(string, encoding='utf8') Buffer properties length in bytes 23 “If you pass a Buffer to a function, it's no longer your buffer! Reading from it or writing to it at that

_v, async_handler{}}; sycl::buffer bufA{dA.data(), sycl::range{dA.size()}}; sycl::buffer bufB{dB.data(), sycl::range{dB.size()}}; sycl::buffer bufO{dO.data(), sycl::range{dO.size()}}; _v, async_handler{}}; sycl::buffer bufA{dA.data(), sycl::range{dA.size()}}; sycl::buffer bufB{dB.data(), sycl::range{dB.size()}}; sycl::buffer bufO{dO.data(), sycl::range{dO.size()}}; _v, async_handler{}}; sycl::buffer bufA{dA.data(), sycl::range{dA.size()}}; sycl::buffer bufB{dB.data(), sycl::range{dB.size()}}; sycl::buffer bufO{dO.data(), sycl::range{dO.size()}};

TBufStream.Destroy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 6.5.6 TBufStream.Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 6.5.7 TBufStream.Capacity . . ascFourEncodedChars Four encoded characters in buffer. ascInitial Initial state ascNoEncodedChar No encoded characters in buffer. ascOneEncodedChar One encoded character in buffer. ascPrefix Prefix processing ascThreeEncodedChars ascThreeEncodedChars Three encoded characters in buffer. ascTwoEncodedChars Two encoded characters in buffer. TASCII85State is for internal use, it contains the current state of the decoder. 1.4 TASCII85DecoderStream