how can i add Byte order mark (BOM) to output file using C?
my output file is ANSI as UTF-8 (which mean UTF-8 without BOM)
but i need it to be UTF-8 with BOM
how can i do that?
the answer is
printf("\xef\xbb\xbf");
Related
I need some help.
I'm writing a program that opens 2 source files in UTF-8 encoding without BOM. The first contains English text and some other information, including ID. The second contains only string ID and translation. The program changes every string from the first file by replacing English chars to Russian translation from the second one and writes these strings to output file. Everything seems to be ok, but there is BOM appears in destination file. And i want to create file without BOM, like source.
I open files with fopen function in text mode with ccs=UTF-8
read string with fgetws function to wchar_t buffer
and write with fputws function to output file
Don't use text mode, don't use the MS ccs= extension to fopen, and don't use fputws. Instead use fopen in binary mode and write the correct UTF-8 yourself.
I have an rtf file which contains special character as it is without decode to hexadecimal or unicode. I am using lib rtf in c language.
Below is the content from the rtf file. It has not mentioned encoded mode.
\b0\fi-380\li1800 · Going to home
While parsing i will get some junk value for the character. How to get proper character from the rtf file if it contains any character in specula mode only.
Regards,
Try this:
\b0\fi-380\li1800 \u183? Going to home
How to do it:
https://stackoverflow.com/a/20117501/1543816
I have to create a m3u8 playlist in my http streaming C++ server code. m3u8 is nothing but UTF-8 m3u file.
How do I create an UTF-8 file (i.e. how to write UTF-8 characters to a file)? Maybe with the open() function or some other function in C++ on Linux?
int fd = open("myplaylist.m3u8", O_WRONLY | O_APPEND);
The way you are planning to do the open() is fine.
What will determine if a file is in utf-8, is the characters you're going to write to it. Provided you encode the relevant characters as utf-8, everything will work as expected.
If you plan on converting a given encoding (say ISO-8859-1) to utf-8, a good way to achieve it is to use libiconv which allows to do exactly that.
Whether a file "is" utf-8 depends on the content. As long as you write() the correct byte sequences in there you will be fine.
For some reason, every file that I bake with CakePHP's console is regarded as ISO-8859-1 encoded by my IDE Dreamweaver. This works fine up to the point where I end up typing a special character, which will be wrongly displayed by the browser, since its encoding (by the editor) differs from the overall rendering.
How can I force the console to produce UTF-8 files, with a BOM if necessary?
I've already tried converting the template files that are used to bake the standard scaffolding pages, but with no luck.
I have the same problem - baked files are NOT UTF-8 but ASCII. (use notepad++ editor which allows easily convert, save files in another format).
Once bake generates files I have to convert them to UTF-8 one by one, to be able to work with Polish local characters.
I tried changing template files to UTF-8 but somehow this does not help. This may have something to do with the fact that the default file does not contain any non ascii character, therefore even if saved as UTF they stay ASCII.
The simplest way I found to overcome this is to modify template file eg.
cake\console\templates\default\classes\model.ctp
to include utf-8 character somewhere, e.g.:
//'message' => 'Your custom message here ł',
(notice last non ASCII character at the end of line.
then converting and saving as UTF-8 makes sure template file is utf-8.
now, model files are generated as UTF-8.
The baked files are UTF-8, or rather, they only contain basic ASCII characters which are identical to the basic UTF-8 range, so can be regarded as either. It's Dreamweaver's problem, not a problem with bake. Check the Dreamweaver settings (or code in a decent editor ;-P).
You do not want to include a BOM, it'll screw you over later.
Use the Bake_UTF8 plugin =]
http://www.github.com/pedroelsner/bake_utf8
I hope this be helpfull.
Pedro Elsner
Another way to achieve this is to open PHP files that are producing UTF-8 content (without BOM) and then saving them in format UTF-8 with BOM using Notepad++ (Encoding->Encode in UTF-8)
In my case I had Excel CSV file:
/patients/exportFirstReport/atskaite1-25-10-2013.csv
Then I had to convert encoding of PHP files down the stack:
\index.php
\app\Controller\PatientsController.php
\app\View\Patients\csv\export_first_report.ctp
\app\View\Layouts\csv\default.ctp
After conversion of encoding of these files it produces readable UTF8 excel files
I am interested in writing utf-8 encoded strings to a file.
I did this with low level functions open() and write().
In the first place I set the locale to a utf-8 aware character set with
setlocale("LC_ALL", "de_DE.utf8").
But the resulting file does not contain utf-8 characters, only iso8859 encoded umlauts. What am I doing wrong?
Addendum: I don't know if my strings are really utf-8 encoded in the first place. I just keep them in the source file in this form: char *msg = "Rote Grütze";
See screenshot for content of the textfile:
alt text http://img19.imageshack.us/img19/9791/picture1jh9.png
Changing the locale won't change the actual data written to the file using write(). You have to actually produce UTF-8 characters to write them to a file. For that purpose you can use libraries as ICU.
Edit after your edit of the question: UTF-8 characters are only different from ISO-8859 in the "special" symbols (ümlauts, áccénts, etc.). So, for all the text that doesn't have any of this symbols, both are equivalent. However, if you include in your program strings with those symbols, you have to make sure your text editor treats the data as UTF-8. Sometimes you just have to tell it to.
To sum up, the text you produce will be in UTF-8 if the strings within the source code are in UTF-8.
Another edit: Just to be sure, you can convert your source code to UTF-8 using iconv:
iconv -f latin1 -t utf8 file.c
This will convert all your latin-1 strings to utf8, and when you print them they will be definitely in UTF-8. If iconv encounters a strange character, or you see the output strings with strange characters, then your strings were in UTF-8 already.
Regards,
Yes, you can do it with glibc. They call it multibyte instead of UTF-8, because it can handle more than one encoding type. Check out this part of the manual.
Look for functions that start with the prefix mb, and also function with wc prefix, for converting from multibyte to wide char. You'll have to set the locale first with setlocale() to UTF-8 so it chooses this implementation of multibyte support.
If you are coming from an Unicode file I believe the function you looking for is wcstombs().
Can you open up the file in a hex editor and verify, with a simple input example, that the written bytes are not the values of Unicode characters that you passed to write(). Sometimes, there is no way for a text editor to determine character set and your text editor may have assumed an ISO8859-1 character set.
Once you have done this, could you edit your original post to add the pertinent information?