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aji/numeric_atoi.c

Created May 22, 2013 23:20
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numeric_atoi.c
unsigned int numeric_atoi(const char *s)
{
return ((s[0] - '0') * 100)
+ ((s[1] - '0') * 10)
+ ((s[2] - '0'));
}
@aji
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aji commented May 22, 2013 

#define numeric_atoi(s) \
  ((((s)[0] - '0') * 100) + \
   (((s)[1] - '0') * 10) + \
   (((s)[2] - '0')))

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aji commented May 22, 2013

If you're pretty sure multiple evaluation of s is okay.

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