string_case_conversion.c

Go to the documentation of this file.

#include "config.h"
#include "string_case_conversion.h"

#include <stddef.h>
#include <stdlib.h>
#include <ctype.h>

#include "len.h"

char *string_to_lower(const char *in)
{
        if(in == NULL)
                return NULL;
        int j, i = str_len(in);
        char *out = (char *)malloc(i + 1);
        for(j = 0; j < i; j++)
                out[j] = (isupper(in[j]) ? tolower(in[j]) : in[j]);

        out[i] = '\0';
        return out;
}

char *string_to_upper(const char *in)
{
        if(in == NULL)
                return NULL;
        int j, i = str_len(in);
        char *out = (char *)malloc(i + 1);
        for(j = 0; j < i; j++)
                out[j] = (islower(in[j]) ? toupper(in[j]) : in[j]);

        out[i] = '\0';
        return out;
}