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Basic support of exception-free environments
This commit is contained in:
Pierre van Houtryve
parent
236d61942e
commit
f9dccda85b
1 changed files with 44 additions and 13 deletions
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@ -29,10 +29,26 @@ DEALINGS IN THE SOFTWARE.
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#define UTF8_FOR_CPP_CHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
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#include "core.h"
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#include <stdexcept>
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#ifndef UTFCPP_USE_EXCEPTIONS
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#if defined(_MSC_VER) && defined(_CPPUNWIND)
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#define UTFCPP_USE_EXCEPTIONS 1
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#elif !defined(_MSC_VER) && defined(__cpp_exceptions)
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#define UTFCPP_USE_EXCEPTIONS 1
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#else
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#define UTFCPP_USE_EXCEPTIONS 0
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#endif
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#endif
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#if UTFCPP_USE_EXCEPTIONS
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#include <stdexcept>
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#else
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#include <cassert>
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#endif
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namespace utf8
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{
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#if UTFCPP_USE_EXCEPTIONS
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// Base for the exceptions that may be thrown from the library
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class exception : public ::std::exception {
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};
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@ -67,13 +83,20 @@ namespace utf8
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virtual const char* what() const throw() { return "Not enough space"; }
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};
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#define UTFCPP_ERROR(Exception, AssertMsg) throw Exception
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#define UTFCPP_THROW(Exception, Message) throw Exception(Message)
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#else
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#define UTFCPP_ERROR(Exception, AssertMsg) assert(AssertMsg && false)
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#define UTFCPP_THROW(Exception, Message) assert(Message && false)
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#endif
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/// The library API - functions intended to be called by the users
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template <typename octet_iterator>
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octet_iterator append(uint32_t cp, octet_iterator result)
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{
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if (!utf8::internal::is_code_point_valid(cp))
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throw invalid_code_point(cp);
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UTFCPP_ERROR(invalid_code_point(cp), "invalid code point");
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if (cp < 0x80) // one octet
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*(result++) = static_cast<uint8_t>(cp);
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@ -144,13 +167,13 @@ namespace utf8
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case internal::UTF8_OK :
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break;
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case internal::NOT_ENOUGH_ROOM :
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throw not_enough_room();
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UTFCPP_ERROR(not_enough_room(), "not enough room");
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case internal::INVALID_LEAD :
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case internal::INCOMPLETE_SEQUENCE :
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case internal::OVERLONG_SEQUENCE :
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throw invalid_utf8(*it);
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UTFCPP_ERROR(invalid_utf8(*it), "invalid utf8");
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case internal::INVALID_CODE_POINT :
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throw invalid_code_point(cp);
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UTFCPP_ERROR(invalid_code_point(cp), "invalid code point");
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}
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return cp;
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}
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@ -166,13 +189,13 @@ namespace utf8
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{
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// can't do much if it == start
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if (it == start)
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throw not_enough_room();
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UTFCPP_ERROR(not_enough_room(), "not enough room");
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octet_iterator end = it;
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// Go back until we hit either a lead octet or start
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while (utf8::internal::is_trail(*(--it)))
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if (it == start)
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throw invalid_utf8(*it); // error - no lead byte in the sequence
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UTFCPP_ERROR(invalid_utf8(*it), "no lead byte in the sequence");
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return utf8::peek_next(it, end);
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}
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@ -183,7 +206,7 @@ namespace utf8
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octet_iterator end = it;
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while (utf8::internal::is_trail(*(--it)))
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if (it == pass_start)
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throw invalid_utf8(*it); // error - no lead byte in the sequence
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UTFCPP_ERROR(invalid_utf8(*it), "no lead byte in the sequence");
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octet_iterator temp = it;
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return utf8::next(temp, end);
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}
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@ -217,15 +240,18 @@ namespace utf8
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if (utf8::internal::is_trail_surrogate(trail_surrogate))
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cp = (cp << 10) + trail_surrogate + internal::SURROGATE_OFFSET;
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else
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throw invalid_utf16(static_cast<uint16_t>(trail_surrogate));
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UTFCPP_ERROR(invalid_utf16(static_cast<uint16_t>(trail_surrogate)),
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"invalid utf16");
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}
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else
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throw invalid_utf16(static_cast<uint16_t>(cp));
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UTFCPP_ERROR(invalid_utf16(static_cast<uint16_t>(cp)),
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"invalid utf16");
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}
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// Lone trail surrogate
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else if (utf8::internal::is_trail_surrogate(cp))
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throw invalid_utf16(static_cast<uint16_t>(cp));
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UTFCPP_ERROR(invalid_utf16(static_cast<uint16_t>(cp)),
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"invalid utf16");
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result = utf8::append(cp, result);
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}
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@ -279,7 +305,7 @@ namespace utf8
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it(octet_it), range_start(rangestart), range_end(rangeend)
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{
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if (it < range_start || it > range_end)
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throw std::out_of_range("Invalid utf-8 iterator position");
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UTFCPP_THROW(std::out_of_range, "Invalid utf-8 iterator position");
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}
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// the default "big three" are OK
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octet_iterator base () const { return it; }
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@ -291,7 +317,7 @@ namespace utf8
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bool operator == (const iterator& rhs) const
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{
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if (range_start != rhs.range_start || range_end != rhs.range_end)
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throw std::logic_error("Comparing utf-8 iterators defined with different ranges");
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UTFCPP_THROW(std::logic_error, "Comparing utf-8 iterators defined with different ranges");
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return (it == rhs.it);
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}
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bool operator != (const iterator& rhs) const
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@ -324,6 +350,11 @@ namespace utf8
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} // namespace utf8
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#undef UTFCPP_USE_EXCEPTIONS
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#undef UTFCPP_ERROR
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#undef UTFCPP_THROW
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#endif //header guard
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