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       toupper.c - scc - simple c99 compiler
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       ---
       toupper.c (97B)
       ---
            1 #include <ctype.h>
            2 
            3 #undef toupper
            4 
            5 int
            6 toupper(int c)
            7 {
            8         return (islower(c)) ? c & ~0x20 : c;
            9 }