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How to convert an ASCII string to an UTF8 string in C++?


How to convert an ASCII string to an UTF8 string in C++?

By : wadesnoopy
Date : October 21 2020, 11:12 PM
Does that help How to convert an ASCII std::string to an UTF8 (Unicode) std::string in C++?
code :


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Convert a UTF8 string to ASCII in Perl

Convert a UTF8 string to ASCII in Perl


By : getencapsulated
Date : March 29 2020, 07:55 AM
With these it helps The answer depends on how you want to use the title. There are 3 basic ways to go:
Bytes that represent a UTF-8 encoded string.
code :
my $bytes = "\xC3\xB6";
say length($bytes); # prints "2"
my $string = decode_utf8($bytes);
say length($string); # prints "1"
C++: how to convert ASCII or ANSI to UTF8 and stores in std::string

C++: how to convert ASCII or ANSI to UTF8 and stores in std::string


By : Cam Cloman
Date : March 29 2020, 07:55 AM
I wish this help you This sounds like a plain conversion from one encoding to another encoding: You can use std::codecvt for this. Whether your implementation ships with a suitable conversion, I don't know, however. From the sounds of it you just try to convert ISO-Latin-1 into Unicode. That should be pretty much trivial: the first 128 characters map (0 to 127) identically to UTF-8 and the second half conveniently map to the corresponding Unicode code points, i.e., you just need to encode the corresponding value into UTF-8. Each character will be replaced by two characters. That it, I think the conversion is something like that:
code :
// Takes the next position and the end of a buffer as first two arguments and the
// character to convert from ISO-Latin-1 as third argument.
// Returns a pointer to end of the produced sequence.
char* iso_latin_1_to_utf8(char* buffer, char* end, unsigned char c) {
    if (c < 128) {
        if (buffer == end) { throw std::runtime_error("out of space"); }
        *buffer++ = c;
    }
    else {
        if (end - buffer < 2) { throw std::runtime_error("out of space"); }
        *buffer++ = 0xC0 & (c >> 6);
        *buffer++ = 0x80 & (c & 0x3f);
    }
    return buffer;
}
Python 2.7, convert utf8 string to ascii

Python 2.7, convert utf8 string to ascii


By : zhangquanit
Date : March 29 2020, 07:55 AM
will be helpful for those in need That's not UTF-8, it's UTF-16, though it's unclear whether it's big endian or little endian (you have no BOM, and you have a leading and trailing NUL byte, making it an uneven length). For text in the ASCII range, UTF-8 is indistinguishable from ASCII, while UTF-16 alternates NUL bytes with the ASCII encoded bytes (as in your example).
In any event, converting to plain ASCII is fairly easy, you just need to deal with the uneven length one way or another:
code :
s = 'u\x00s\x00e\x00r\x00n\x00a\x00m\x00e\x00' # I removed \x00 from beginning manually
sascii = s.decode('utf-16-le').encode('ascii')

# Or without manually removing leading \x00
sascii = s.decode('utf-16-be', errors='ignore').encode('ascii')
sascii = s.replace('\x00', '')
how to convert a utf8 string to ascii string?

how to convert a utf8 string to ascii string?


By : Micky Munns
Date : March 29 2020, 07:55 AM
I hope this helps you . UTF-8 is a superset of ASCII. The character codes 0-127 (i.e. the ASCII characters) are directly mapped to the binary values 0-127. If you want to convert UTF-8 to ASCII, you can simply remove all bytes that are >= 128. This means that non-ASCII characters will be ignored in the converted string - if that is what you want.
Mind that for UTF-8 decoding, you need to detect characters that are encoded as multiple bytes. The number of bytes is the number of '1' bits left of the leftmost '0' bit, and this only applies to bytes >= 128. For example, 11000000 is the first byte of a character that was encoded to two bytes (it has two significant '1' bits). That means you also have to remove the following byte.
Convert a ASCII-encoded string to UTF8?

Convert a ASCII-encoded string to UTF8?


By : Timothy B
Date : March 29 2020, 07:55 AM
seems to work fine You are in luck. UTF8 is backwards compatible with ASCII, so all you need to do is this (assuming your input is a C-string):
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