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This commit is contained in:
qPCR4vir
2016-03-23 17:19:54 +01:00
parent d2b08d0f26
commit 266def9ee3
2 changed files with 32 additions and 31 deletions
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13
source/charset.cpp
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@@ -578,37 +578,38 @@ namespace nana
std::string data_for_move_;
};
#else
/// return the first code point and move the pointer to next character, springing to the end by errors
unsigned long utf8char(const unsigned char*& p, const unsigned char* end)
{
if(p != end)
{
if(*p < 0x80)
if(*p < 0x80) // ASCII char 0-127 or 0-0x80
{
return *(p++);
}
unsigned ch = *p;
unsigned long code;
if(ch < 0xC0)
if(ch < 0xC0) // error? - move to end. Posible ANSI or ISO code-page
{
p = end;
return 0;
}
else if(ch < 0xE0 && (p + 1 <= end))
else if(ch < 0xE0 && (p + 1 <= end)) // two byte chararcter
{
code = ((ch & 0x1F) << 6) | (p[1] & 0x3F);
p += 2;
}
else if(ch < 0xF0 && (p + 2 <= end))
else if(ch < 0xF0 && (p + 2 <= end)) // 3 byte character
{
code = ((((ch & 0xF) << 6) | (p[1] & 0x3F)) << 6) | (p[2] & 0x3F);
p += 3;
}
else if(ch < 0x1F && (p + 3 <= end))
else if(ch < 0x1F && (p + 3 <= end)) // 4 byte character
{
code = ((((((ch & 0x7) << 6) | (p[1] & 0x3F)) << 6) | (p[2] & 0x3F)) << 6) | (p[3] & 0x3F);
p += 4;
}
else
else // error, go to end
{
p = end;
return 0;