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lib/icu/Util: add overload which throws exception

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This commit is contained in:
Max Kellermann 2016-04-12 22:04:35 +02:00
parent a497cc46f9
commit 4eaa82fd22
2 changed files with 31 additions and 0 deletions
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23
src/lib/icu/Util.cxx
View File

@ -27,6 +27,7 @@
#include <unicode/ustring.h>
#include <memory>
#include <stdexcept>
#include <assert.h>
#include <string.h>
@ -73,3 +74,25 @@ UCharToUTF8(ConstBuffer<UChar> src)
dest[dest_length] = 0;
return AllocatedString<>::Donate(dest.release());
}
AllocatedString<>
UCharToUTF8Throw(ConstBuffer<UChar> src)
{
assert(!src.IsNull());
/* worst-case estimate */
size_t dest_capacity = 4 * src.size;
std::unique_ptr<char[]> dest(new char[dest_capacity + 1]);
UErrorCode error_code = U_ZERO_ERROR;
int32_t dest_length;
u_strToUTF8(dest.get(), dest_capacity, &dest_length,
src.data, src.size,
&error_code);
if (U_FAILURE(error_code))
throw std::runtime_error(u_errorName(error_code));
dest[dest_length] = 0;
return AllocatedString<>::Donate(dest.release());
}

8
src/lib/icu/Util.hxx
View File

@ -40,4 +40,12 @@ UCharFromUTF8(const char *src);
AllocatedString<char>
UCharToUTF8(ConstBuffer<UChar> src);
/**
* Wrapper for u_strToUTF8().
*
* Throws std::runtime_error on error.
*/
AllocatedString<char>
UCharToUTF8Throw(ConstBuffer<UChar> src);
#endif