c_tests, C (clang)

Language: Layout:

//gcc 4.9.3

#include  <stdio.h>
#include <ctype.h>

int MACConvert(unsigned char *in, unsigned char *out) {
    unsigned char* pIn = in;
    unsigned char* pOut = out;
    int ctr = 0;
    
    while (*pIn != '\0') {
        if (ctr == 2) {
            if (!isalnum(*pIn)) {
                ctr = 0;
                *pOut = '-';
                pIn++;
                pOut++;
                continue;
            }
            else {
                printf("Not MAC\n");
                strcpy((char *)out, (char *)in);
                return strlen(in);
            }
        }
        else
            ctr++;
            
        *pOut = toupper(*pIn);
        pIn++;
        pOut++;
    }
    
    return strlen(in);
    
    
/*
    for(i = 1,n = 0; *(in + i) != '\0'; i++) {
        if(!isalnum(*(in + 3*i)))  {

if(++n > 5)
                break;
        }
    }

if(n <= 2) {	// This is not a MAC address, copy input to output
        strcpy((char *)out, (char *)in);
        return strlen((const char *)in);
    }

for(i = 1; *(in + i); i++) {
        c = *(in + 3*i);

if(c == '-')
            *(out + i) = ':';
        else
            *(out + i) = (unsigned char)toupper(c);
    }
    */
}

int main(void)
{
    char out[20];
    char in[20];
    int retLen = 0;
    int test[10];
    
    
    memset(out, 0, 20);
    strcpy(in, "2a-2b-2c-2d-2e");
    retLen = MACConvert(in, &out[0]);
    printf("MACConvert of %s returns %s, len(%d)\n", in, out, retLen);
    
    memset(out, 0, 20);
    strcpy(in, "2a*2b*2c-2d-2e");
    retLen = MACConvert(in, &out[0]);
    printf("MACConvert of %s returns %s, len(%d)\n", in, out, retLen);
    
    memset(out, 0, 20);
    strcpy(in, "2a2b2c-2d-2e");
    retLen = MACConvert(in, &out[0]);
    printf("MACConvert of %s returns %s, len(%d)\n", in, out, retLen);
    
    memset(out, 0, 20);
    retLen = MACConvert(test, &out[0]);
    
    return 0;
}

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Compilation time: 0.12 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0,36 sec