Re: how to write a string to a c pointer?
On 2015-03-06 at 00:25, ketmar wrote: unicode sux[1]. [1] http://file.bestmx.net/ee/articles/uni_vs_code.pdf Great article. Thanks, Кетмар ⚠ ∑ ♫ ⚽ ☀ ☕ ☺ ≡ ♛
Re: how to write a string to a c pointer?
On Friday, 6 March 2015 at 00:53:49 UTC, Ali Çehreli wrote: It made me happy that I was not the only person who has been ruminating over alphabet as the crucial piece in this whole Unicode story. I've been giving the example of if I have a company name as the string ali jim, the uppercase of it should be ALİ JIM because the different letter 'i's belong to different alphabets. I'd say, company name should be processed verbatim, no need for uppercase should arise.
Re: how to write a string to a c pointer?
On Thu, 05 Mar 2015 16:36:35 +0100, FG wrote: Damn those composite characters! or invisible ones. or RTL switch. unicode sux[1]. [1] http://file.bestmx.net/ee/articles/uni_vs_code.pdf signature.asc Description: PGP signature
Re: how to write a string to a c pointer?
On 03/05/2015 03:25 PM, ketmar wrote: unicode sux[1]. [1] http://file.bestmx.net/ee/articles/uni_vs_code.pdf Thanks. I enjoyed the article and I agree with everything said in there. It made me happy that I was not the only person who has been ruminating over alphabet as the crucial piece in this whole Unicode story. I've been giving the example of if I have a company name as the string ali jim, the uppercase of it should be ALİ JIM because the different letter 'i's belong to different alphabets. Anyway... Here is how I attempted to define an alphabet with its implied collation orders. For example, for the Turkish alphabet: https://code.google.com/p/trileri/source/browse/trunk/tr/alfabe.d#796 Unfortunately, the code itself is in Turkish, has never been finished, bad and older D code, and is abandoned at this point. :-/ Ali
Re: how to write a string to a c pointer?
On 2015-03-05 at 10:42, Kagamin wrote:
string s;
char[] b = cast(char[])asArray();
b[0..s.length] = s[];
It's a bit more complicated than that if you include cutting string for buffers
with smaller capacity, doing so respecting UTF-8, and adding a '\0' sentinel,
since you may want to use the string in C (if I assume correctly). The
setString function does all that:
import std.stdio, std.range, std.c.stdlib;
class Buffer {
private void *ptr;
private int size;
private int _cap;
public this(int cap) { ptr = malloc(cap); this._cap = cap; }
public ~this() { free(ptr); }
public ubyte[] asArray() { ubyte[] ret = (cast(ubyte*)ptr)[0..cap]; return
ret; }
public void* getPtr() { return ptr; }
public int cap() { return _cap; }
}
int setString(Buffer buffer, string s)
{
assert(buffer.cap 0);
char[] b = cast(char[])buffer.asArray();
int len = min(s.length, buffer.cap - 1);
int break_at;
// The dchar is essential in walking over UTF-8 code points.
// break_at will hold the last position at which the string can be cleanly
cut
foreach (int i, dchar v; s) {
if (i == len) { break_at = i; break; }
if (i len) break;
break_at = i;
}
len = break_at;
b[0..len] = s[0..len];
// add a sentinel if you want to use the string in C
b[len] = '\0';
// you could at this point set buffer.size to len in order to use the
string in D
return len;
}
void main()
{
string s = ąćęłńóśźż;
foreach (i; 1..24) {
Buffer buffer = new Buffer(i);
int len = setString(buffer, s);
printf(bufsize %2d -- strlen %2d -- %s --\n, i, len, buffer.getPtr);
}
}
Output of the program:
bufsize 1 -- strlen 0 -- --
bufsize 2 -- strlen 0 -- --
bufsize 3 -- strlen 2 -- ą --
bufsize 4 -- strlen 2 -- ą --
bufsize 5 -- strlen 4 -- ąć --
bufsize 6 -- strlen 4 -- ąć --
bufsize 7 -- strlen 6 -- ąćę --
bufsize 8 -- strlen 6 -- ąćę --
bufsize 9 -- strlen 8 -- ąćęł --
bufsize 10 -- strlen 8 -- ąćęł --
bufsize 11 -- strlen 10 -- ąćęłń --
bufsize 12 -- strlen 10 -- ąćęłń --
bufsize 13 -- strlen 12 -- ąćęłńó --
bufsize 14 -- strlen 12 -- ąćęłńó --
bufsize 15 -- strlen 14 -- ąćęłńóś --
bufsize 16 -- strlen 14 -- ąćęłńóś --
bufsize 17 -- strlen 16 -- ąćęłńóśź --
bufsize 18 -- strlen 16 -- ąćęłńóśź --
bufsize 19 -- strlen 16 -- ąćęłńóśź --
bufsize 20 -- strlen 16 -- ąćęłńóśź --
bufsize 21 -- strlen 16 -- ąćęłńóśź --
bufsize 22 -- strlen 16 -- ąćęłńóśź --
bufsize 23 -- strlen 16 -- ąćęłńóśź --
Re: how to write a string to a c pointer?
string s; char[] b = cast(char[])asArray(); b[0..s.length] = s[];
Re: how to write a string to a c pointer?
On Thursday, 5 March 2015 at 09:42:53 UTC, Kagamin wrote: string s; char[] b = cast(char[])asArray(); b[0..s.length] = s[]; Thank you very much. I should stop my developing , and read the dlang tutorial again.
how to write a string to a c pointer?
I am writing a asio binding. Objects need to be serialized into a
buffer (void *),
for example, write utf8 string into buffer,
write int into buffer,
write long into buffer,
Here is my class
class Buffer
{
private void *ptr;
private int size;
private int _cap;
public this(int cap)
{
ptr = malloc(cap);
this._cap = cap;
}
public ~this()
{
free(ptr);
}
public ubyte[] asArray()
{
ubyte[] ret = (cast(ubyte*)ptr)[0..cap];
return ret;
}
public void* getPtr()
{
return ptr;
}
public int cap()
{
return _cap;
}
}
how can i write a utf8 string into the buffer?
