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Fix inserting 3 byte wchar into String

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* Fix inserting 3 byte wchar into String
* Improve documentation
This commit is contained in:
Eugen Wissner 2017-07-09 15:16:06 +02:00
parent 97358ebc6c
commit 7bdc778390
1 changed files with 95 additions and 46 deletions
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61
source/tanya/container/string.d
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@ -3,7 +3,19 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* UTF-8 string.
* UTF-8 encoded string.
*
* You can create a $(D_PSYMBOL String) from a literal string, single character
* or character range. Characters can be of the type $(D_KEYWORD char),
* $(D_KEYWORD wchar) or $(D_KEYWORD dchar). Literal strings, characters and
* character ranges can be also inserted into an existing string.
*
* $(D_PSYMBOL String) is always valid UTF-8. Inserting an invalid sequence
* or working on a corrupted $(D_PSYMBOL String) causes
* $(D_PSYMBOL UTFException) to be thrown.
*
* Internally $(D_PSYMBOL String) is represented by a sequence of
* $(D_KEYWORD char)s.
*
* Copyright: Eugene Wissner 2017.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
@ -537,7 +549,7 @@ struct String
if (is(C == wchar) || is(C == dchar))
in
{
assert(capacity - length >= C.sizeof);
assert(capacity - length >= 3);
}
body
{
@ -555,7 +567,7 @@ struct String
this.length_ += 2;
return 2;
}
else if (chr < 0xd800 || chr - 0xe000 < 0x2000)
else if (chr < 0xd800 || (chr >= 0xe000 && chr <= 0xffff))
{
*dst++ = 0xe0 | (chr >> 12) & 0xff;
*dst++ = 0x80 | ((chr >> 6) & 0x3f);
@ -593,9 +605,9 @@ struct String
/// Ditto.
size_t insertBack(const wchar chr) @trusted @nogc
{
reserve(length + wchar.sizeof);
reserve(length + 3);
auto ret = insertWideChar(chr);
const ret = insertWideChar(chr);
if (ret == 0)
{
throw defaultAllocator.make!UTFException("Invalid UTF-16 sequeunce");
@ -603,12 +615,34 @@ struct String
return ret;
}
// Allocates enough space for 3-byte character.
private @safe @nogc unittest
{
String s;
s.insertBack('\u8100');
}
private @safe @nogc unittest
{
UTFException exception;
try
{
auto s = String(1, cast(wchar) 0xd900);
}
catch (UTFException e)
{
exception = e;
}
assert(exception !is null);
defaultAllocator.dispose(exception);
}
/// Ditto.
size_t insertBack(const dchar chr) @trusted @nogc
{
reserve(length + dchar.sizeof);
auto ret = insertWideChar(chr);
const ret = insertWideChar(chr);
if (ret > 0)
{
return ret;
@ -624,6 +658,21 @@ struct String
}
}
private @safe @nogc unittest
{
UTFException exception;
try
{
auto s = String(1, cast(dchar) 0xd900);
}
catch (UTFException e)
{
exception = e;
}
assert(exception !is null);
defaultAllocator.dispose(exception);
}
/**
* Inserts a stringish range at the end of the string.
*