C code to compare two texts in form of array of chars ignoring the capitalization, C (gcc)

C code to compare two texts in form of array of chars ignoring the capitalization

//gcc 5.4.0

// C code to compare two texts in form of array of chars ignoring the capitalization
// code by Twareintor

#include  <stdio.h>
#include <string.h>

#define PRINT_RESULT(X) if(X) printf("\"%s\"\n", X); else printf("same text ingore capitalization\n");

/** this function compares two array of chars apart of capitalization through comparing 
 * every character (whose the fifth bit was set to 1) of both arrays - see the function code
 * - very useful for text analysis, interpretation and also in machine learning applications
 * for example: checking source code for case insensitive programming languages, like SQL etc.
 * where the execution time is an issue.
 */
char* strcmpIgnCase(const char* szTest, const size_t testLen, const char* szText);

int main(void)
{
    const char szTest[] = "The Quick Brown Fox Jumps Over The LaZY DOG";
    const char szText[] = "tHe qUicK BROWn fOx jumPs oVEr the LazY dog!!!!!!";
    const char szTeZt[] = "tHe qUicK BROWn fOx jumPs oVEr the cRazYFrog!!!!!";
    
    char* szCmp = strcmpIgnCase(szTest, strlen(szTest), szText);             PRINT_RESULT(szCmp)
    szCmp = strcmpIgnCase(szTest, strlen(szTest), szTeZt);                   PRINT_RESULT(szCmp)
    szCmp = strcmpIgnCase(szTest, strstr(szTeZt, "cRazY")-szTeZt-1, szTeZt); PRINT_RESULT(szCmp)
    return 0;
}

char* strcmpIgnCase(const char* szTest, const size_t testLen, const char* szText)
{
    size_t i;
    // byte-by-byte (except 5-th bit) copmared along the specified length
    for(i=0; i<testLen; i++){if((szTest[i]|32)!=(szText[i]|32)) return szTest+i;}
    // printf("\"%s\"\\", szTest);
    return 0;
}


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