Case.h File Reference

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Functions
char *	strtolower (char *str)
	Converts a string to all lower case. More...
char *	strtoupper (char *str)
	Converts a string to all upper case. More...
int	strcicmp (const char *s1, const char *s2)
	Case-insensitive string comparison. More...

Function Documentation

strcicmp()

int strcicmp	(	const char *	s1,
		const char *	s2
	)

Case-insensitive string comparison.

The original strings are not overwritten.

Parameters

[in]	s1	A C-string (char*)
[in]	s2	A C-string (char*)

Returns

As with strcmp, returns 0 if the strings are identical up to case, and otherwise 1.

{
    char* t1 = (char*) calloc(strlen(s1) + 1, sizeof(char));
    char* t2 = (char*) calloc(strlen(s2) + 1, sizeof(char));
    strncpy(t1, s1, strlen(s1));
    strncpy(t2, s2, strlen(s2));
    strtolower(t1);
    strtolower(t2);
    int out = strcmp(t1, t2);
    if (out != 0)
        out = 1;
    
    free(t1);
    free(t2);
    return out;
}

References strtolower().

strtolower()

char* strtolower

(

char *

str

)

Converts a string to all lower case.

The original string is overwritten.

Parameters

[in]

str

A C-string (char*), that will be overwritten.

Returns

str

{
    for (int i = 0; i < strlen(str); i++)
        str[i] = tolower(str[i]);
    return str;
}

References constants::i.

Referenced by strcicmp().

strtoupper()

char* strtoupper

(

char *

str

)

Converts a string to all upper case.

The original string is overwritten.

Parameters

[in]

str

A C-string (char*), that will be overwritten.

Returns

str

{
    for (int i = 0; i < strlen(str); i++)
        str[i] = toupper(str[i]);
    return str;
}

References constants::i.