How can I read/write structures from/to data files?
Structures, Unions, and EnumerationsIt is relatively straightforward to write a structure out using fwrite: fwrite(&somestruct, sizeof somestruct, 1, fp); and a corresponding fread invocation can read it back in. What happens here is that fwrite receives a pointer to the structure, and writes (or fread correspondingly reads) the memory image of the structure as a stream of bytes. The sizeof operator determines how many bytes the structure occupies.
How can I read/write structs from/to data files?
Infrequently Asked Questions in comp.lang.cLoop with putchar. Be careful; if your machine uses signed chars by default, all of the sign bits in your structure elements will be reversed. [a]
How fast can you read/write data on a Blu-ray disc?
Blu-ray.com - Blu-ray FAQAccording to the Blu-ray Disc specification, 1x speed is defined as 36Mbps. However, as BD-ROM movies will require a 54Mbps data transfer rate the minimum speed we're expecting to see is 2x (72Mbps). Blu-ray also has the potential for much higher speeds, as a result of the larger numerical aperture (NA) adopted by Blu-ray Disc.
Can I read and write plain text files which contain tabular data?
NExS (X/Motif GUI Spreadsheet) Frequently Asked QuestionsYes. NExS attempts to intelligently parse plain text by looking for vertical columns of ''white space'' (space or tab characters), assuming that's where the data should be cut into columns. Of course, this is not always what is intended, so there are adjustable parameters on the ''Import/Export Options'' dialog to tweak the way the file is cut into columns.
How do I read (or write) binary data?
Python Library and Extension FAQor complex data formats, it's best to use the struct module. It allows you to take a string containing binary data (usually numbers) and convert it to Python objects; and vice versa. For example, the following code reads two 2-byte integers and one 4-byte integer in big-endian format from a file: import struct f = open(filename, "rb") # Open in binary mode for portability s = f.read(8) x, y, z = struct.
Can I write huge data files?
intradisk:faq:general [Intradisk Forum]The file system does not restrict the size of a file and can process all file sizes. As well NFS is capable of handling huge files on the network. FTP and Samba protocol are currently still limited to a 4GB file size.
How do I read/write files?
JavaScript - Frequently Asked Questions - CodingForums.comPure client-side JavaScript cannot write files to the server because it simply was never intended to and moreover, that's what server-side languages are used for. Perhaps there are security reasons among others for this as well. for reading files with JavaScript, this is completely possible and done quite easily if you use something like Vlad's script or David's script.
I need to read/write files. How do I find the correct path for my site?
hsphere faqThe correct way to do this would be using Server.MapPath. This would map the virtual path to a physical location on the disk. Ex. If you have a file in your root web called visitor.txt and you use Server.MapPath("/visitor.txt") and the physical path to you root web was "F:\webs\yourweb" then it would return: "F:\webs\yourweb\visitor.txt" If you use this method you should never have to worry about the physical paths.
Can I read and write files from a kernel module?
Unofficial comp.os.linux.development.* FAQYes, but it is a little tricky. You should not use the usual user space functions open, read, write, and close. Instead you should use filp_open and the methods in the returned struct. Always remember to cleanup after yourself. Here is an example: (FIXME: Put the updated version here) kcp.c. If you need more examples I suggest you take a look on the sourcecode for the khttpd or tux webserver. Always remember that file access is only possible in a process context.
When I read and write graphics files they have errors. Why?
REBOL Language FAQBe sure to use the /BINARY refinements on READ and WRITE when dealing with binary data such as graphics, programs, compressed data, etc. data: read/binary http://web.page.org/pic.jpg write/binary %some-pic.jpg data If you don't, the file will be read as a text string, and any bytes that appear to be line terminations (CR) will be converted or deleted.
I am able to read the data from my phone, but cannot write anything back. What should I do?
FAQYou probably haven't yet registered your phone to the program. You can find the needed instructions in the very letter, was sent you with the keycode and the links.
How can I read and write from a database?
FAQ - iMacrosDatabase integration is very easy with iMacros thanks to its powerful Scripting Interface. iMacros can connect to any Windows database, for example Access or SQL Server, but also MySQL. The Scripting Interface can be used from any Windows programming or scripting language like Excel VBA, Foxpro, Perl, C, C++, Java with no problems. Please see the following example scripts: "extract-2-file.vbs" (uses wsh-extract-and-fill-part1 and wsh-extract-and-fill-part1 macros) "extract-2-database.
How can I read signal files?
Frequently Asked Questions about PhysioNetIf you would like to read signal files within a C, C++, Fortran, Java, Perl, or Python program, see the WFDB Programmer's Guide for information on doing this using the WFDB library. Other programming languages supported by SWIG may also be usable with the WFDB library, but have not been tested. Briefly, use isigopen() to open the files, and getvec() to read them.
How can I read annotation files?
Frequently Asked Questions about PhysioNetIf you would like to read annotation files within a C, C++, Fortran, Java, Perl, or Python program, see the WFDB Programmer's Guide. Other programming languages supported by SWIG may also be usable with the WFDB library, but have not been tested. Briefly, use annopen() to open the files, and getann() to read annotations from them.
How do I read the download files on this website?
Frequently Asked Questions (FAQs)pipe-delimited text (.txt) format files (OTCBB Symbol Directory, Daily List, Monthly Share Volume, etc.); self-extracting ZIP (.exe) files that expand into pipe-delimited text format files (Monthly Share Volume Report, Market Maker List, Other-OTC Symbol Directory, etc.). This information will need to be saved to your computer. Select File from the menu bar, then select the Save As... option You can now import the data into a spreadsheet or database.
Why are some files in PDF format, and how can I read them?
FRB: FAQsAdobe's Portable Document Format (PDF) reproduces the exact look of a printed page and is used for documents that could not be readily deployed in hypertext markup language (HTML)--the "typeset" format that is designed for web browsers--or in the plain "typewriter" text of ASCII (American Standard Code for Information Interchange). Also, the document may be offered in PDF along with one or both of the other two formats.
How i can get read and write access to ntfs files system from fedora?
Fedora For NewbiesFedora kernel has module for read and write access to the ntfs file system, that should be enabled, now the easy way for installed kernel is to install the kernel version ntfs modules get the lates fedora core 5 kernel ntfs moudle from here or use the yum to install the module:
How can I read and write pltgks netcdf files from fortran?
Radar Meteorology Group Frequently Asked QuestionsThree routines have been created to make it easier to read and write pltgks netcdf files in fortran. To read a pltgks netcdf file you first call 'readinfd' to read the header information and then 'readat' to read the data. To write a pltgks netcdf file you call 'wrtdatd'. A description of the subroutines can be found at http://olympic.atmos.colostate.edu/software/rwpltgks.txt. Yes you can. A sample program showing and describing how it can be done is available at http://olympic.atmos.colostate.
Can't Gartrip read and write files for Mapsource and Google Earth?
GARtrip FAQIt can't read and write the special file formats of those programs, but with the general purpose file format GPX this is possible - for Googel Earth with KML as well.. Why not use the GPX file format in general, to save user data, instead of the special file formats of Gartrip? Then I would not need to convert my data each time I want to access it with another program. This is not recommended because Gartrip, like all other programs, saves additional data in its own format.
Is there a library to read or write Microsoft Office or other application files?
perlwin32faq9 - Modules and sample scriptsIn general, there aren't any library modules to read or write application files, like Microsoft Word, Microsoft Excel, Microsoft Access, WordPerfect, Lotus 1-2-3, etc. However, many if not most major Windows applications now support OLE Automation. You can use the OLE Automation support of Microsoft Office applications to read and write their file formats, for example. See the documentation on your application for information on its support for OLE Automation.
