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Implement seek() utfbytes() in Sys module. - Updated tests for utfbytes() - Updated utf8 API surface to support the general length case (codepoint _and_ byte) - Testing of seek() still outstanding Comment added regarding stack frame pointer in stack frames.

arr committed 9 years ago

Commit a6da1dc1 parent 1af55286 files · +94 −18Browse files

Showing the changes to src/vm/string.cpp (1 of 6 files). Show all

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src/vm/string.cpp+8−3
@@ -191,10 +191,15 @@ vm_string_t::vm_string_t(std::size_t encoded_str_len, const uint8_t *encoded_str · 190 unmodified lines
191 , _mem{}191 , _mem{}
192{192{
193 assert((encoded_str_len > 0 && encoded_str != nullptr) || (encoded_str_len == 0 && encoded_str == nullptr));193 assert((encoded_str_len > 0 && encoded_str != nullptr) || (encoded_str_len == 0 && encoded_str == nullptr));
194 auto character_count = utf8::count_codepoints(encoded_str, encoded_str_len);194 const auto utf8_length = utf8::count_codepoints(encoded_str, encoded_str_len);
195 _character_size = (encoded_str_len != character_count) ? sizeof(rune_t) : sizeof(char);
196 195
197 _length = static_cast<word_t>(character_count);196 // Check if the supplied string is completely valid UTF-8 - only valid UTF-8 strings can be DisVM strings.
197 if (encoded_str_len != utf8_length.byte_count)
198 throw invalid_utf8{};
199
200 _character_size = (encoded_str_len != utf8_length.codepoint_count) ? sizeof(rune_t) : sizeof(char);
201
202 _length = static_cast<word_t>(utf8_length.codepoint_count);
198 _length_max = sizeof(_mem.local) / _character_size;203 _length_max = sizeof(_mem.local) / _character_size;
199 204
200 // Allocate memory based on character count and size205 // Allocate memory based on character count and size