On Tuesday, 6 December 2022 at 23:41:09 UTC, H. S. Teoh wrote:
On Tue, Dec 06, 2022 at 11:07:32PM +0000, johannes via
Digitalmars-d-learn wrote:
//-- the result should be f.i. "the sun is shining"
//-- sqlite3_column_text returns a constant char* a \0
delimited c-string
printf("%s\n",sqlite3_column_text(res, i));
writeln(sqlite3_column_text(res, i));
[...]
In D, strings are not the same as char*. You should use
std.conv.fromStringZ to convert the C char* to a D string.
Well, if we think the other way around, in the example below we'd
copy string, right?
```d
void stringCopy(Chars)(string source,
ref Chars target)
{
import std.algorithm : min;
auto len = min(target.length - 1,
source.length);
target[0 .. len] = source[0 .. len];
target[len] = '\0';
}
import std.stdio;
void main()
{ // |----- 21 chars ------| |-- 8 --|
string sample = "bu bir deneme olmakta\0gizlimi?";
char[30] cTxt; // 29 + 1'\0'
sample.stringCopy = cTxt; // disappeared ? char
cTxt.writeln; // appeared 28 chars
printf("%s\n", cTxt.ptr); // appeared 21 chars
printf("%s\n", &cTxt[22]); // appeared 7 chars
writefln!"%(%02X %)"(cast(ubyte[])cTxt);
}
```
Attention, the method used is again a slicing...
SDB@79
