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avoid UB when int is added to a pointer

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This commit is contained in:
Jinhao 2016-06-10 16:02:20 +08:00
parent 5b1891c186
commit 9c7ffbeb15
1 changed files with 3 additions and 4 deletions
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7
source/deploy.cpp
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@ -500,16 +500,15 @@ namespace nana
if (uv < 0xC0) if (uv < 0xC0)
return false; return false;
if ((uv < 0xE0) && (ustr + 1 < end)) if ((uv < 0xE0) && (end - ustr > 1))
ustr += 2; ustr += 2;
else if (uv < 0xF0 && (ustr + 2 <= end)) else if ((uv < 0xF0) && (end - ustr > 2))
ustr += 3; ustr += 3;
else if (uv < 0x1F && (ustr + 3 <= end)) else if ((uv < 0x1F) && (end - ustr > 3))
ustr += 4; ustr += 4;
else else
return false; return false;
} }
return true; return true;
} }