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Fix integer parsing in cli (#2003)

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Philip Jones 2020-02-18 15:30:59 -08:00 committed by GitHub
parent ff6350c098
commit 4e728e26ca
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1 changed files with 3 additions and 1 deletions
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programs/zstdcli.c
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@ -254,10 +254,12 @@ static int readU32FromCharChecked(const char** stringPtr, unsigned* value)
{ {
unsigned result = 0; unsigned result = 0;
while ((**stringPtr >='0') && (**stringPtr <='9')) { while ((**stringPtr >='0') && (**stringPtr <='9')) {
unsigned const max = (((unsigned)(-1)) / 10) - 1; unsigned const max = ((unsigned)(-1)) / 10;
unsigned last = result;
if (result > max) return 1; /* overflow error */ if (result > max) return 1; /* overflow error */
result *= 10; result *= 10;
result += (unsigned)(**stringPtr - '0'); result += (unsigned)(**stringPtr - '0');
if (result < last) return 1; /* overflow error */
(*stringPtr)++ ; (*stringPtr)++ ;
} }
if ((**stringPtr=='K') || (**stringPtr=='M')) { if ((**stringPtr=='K') || (**stringPtr=='M')) {