FILE I/O: PAST, PRESENT AND FUTURE CPPCON OCTOBER 3RD 2023 GUY DAVIDSON @HATCAT01INTRODUCTIONS • Head of Engineering Practice at Creative Assembly • 1980 – Acorn Atom • ISO/IEC JTC1/SC22/WG21 • BSI Why do we have files? • What is a filesystem? • Why should we avoid buffered file IO? • How do we optimise unbuffered file IO? • How might the standard help us in future?AGENDA • Sub-megabyte days • More RAM, more disk capacity • Moving data into and out of RAM • File IO in C++ from fstream to the OS SDK • The 64-bit address spaceSUB-MEGABYTE DAYS • Why do we have files?SUB- MEGABYTE DAYSSUB-

concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 9.2 Supported formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 10 VirtualBox external authentication processes them. Since the entire web service API is publicly described in a web service description file (in WSDL format), you can write client programs that call the web service in any language with a toolkit This specifies the file name containing the server private key and the certificate. This is a mandatory parameter if SSL is enabled. • --passwordfile (or -a): This specifies the file name containing the

concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399 9.2 Supported formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399 10 VirtualBox external authentication processes them. Since the entire web service API is publicly described in a web service description file (in WSDL format), you can write client programs that call the web service in any language with a toolkit This specifies the file name containing the server private key and the certificate. This is a mandatory parameter if SSL is enabled. • --passwordfile (or -a): This specifies the file name containing the

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 Supported file formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Using update --init. 1.2 Building the library 1.2.1 Windows On Windows there is a Visual Studio solution file in platform/win32/mupdf.sln. Using Microsoft Visual Studio To build the required DLLs, load platform/win32/mupdf • mutool An all purpose tool for dealing with PDF files. 1.4 Supported file formats MuPDF supports the following file formats: pdf, epub, xps, cbz, mobi, fb2, svg And a suite of image types, e.g. png

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 Supported file formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Using update --init. 1.2 Building the library 1.2.1 Windows On Windows there is a Visual Studio solution file in platform/win32/mupdf.sln. Using Microsoft Visual Studio To build the required DLLs, load platform/win32/mupdf • mutool An all purpose tool for dealing with PDF files. 1.4 Supported file formats MuPDF supports the following file formats: pdf, epub, xps, cbz, mobi, fb2, svg And a suite of image types, e.g. png

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 Supported file formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Using update --init. 1.2 Building the library 1.2.1 Windows On Windows there is a Visual Studio solution file in platform/win32/mupdf.sln. Using Microsoft Visual Studio To build the required DLLs, load platform/win32/mupdf • mutool An all purpose tool for dealing with PDF files. 1.4 Supported file formats MuPDF supports the following file formats: pdf, epub, xps, cbz, mobi, fb2, svg And a suite of image types, e.g. png

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 Supported file formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Using update --init. 1.2 Building the library 1.2.1 Windows On Windows there is a Visual Studio solution file in platform/win32/mupdf.sln. Using Microsoft Visual Studio To build the required DLLs, load platform/win32/mupdf • mutool An all purpose tool for dealing with PDF files. 1.4 Supported file formats MuPDF supports the following file formats: pdf, epub, xps, cbz, mobi, fb2, svg And a suite of image types, e.g. png

line by viewing the command-line help. 1.1.2 Conda packages • What is a conda package? • .conda file format • Using packages • Package structure • Metapackages – Anaconda metapackage – Mutex metapackages • More information What is a conda package? A conda package is a compressed tarball file (.tar.bz2) or .conda file that contains: • system-level libraries. • Python or other modules. • executable programs tar archive directly. .conda file format The .conda file format was introduced in conda 4.7 as a more compact, and thus faster, alternative to a tarball. The .conda file format consists of an outer,

processes them. Since the entire web service API is publicly described in a web service description file (in WSDL format), you can write client programs that call the web service in any language with a toolkit This specifies the file name containing the server private key and the certificate. This is a mandatory parameter if SSL is enabled. • --passwordfile (or -a): This specifies the file name containing the is not protected by a password). If the file name - is specified then then the password is read from the standard input stream, otherwise from the specified file. The user is responsible for appropriate

processes them. Since the entire web service API is publicly described in a web service description file (in WSDL format), you can write client programs that call the web service in any language with a toolkit This specifies the file name containing the server private key and the certificate. This is a mandatory parameter if SSL is enabled. • --passwordfile (or -a): This specifies the file name containing the is not protected by a password). If the file name - is specified then then the password is read from the standard input stream, otherwise from the specified file. The user is responsible for appropriate