glitchedhttps_strutil.h

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/*
   Copyright 2020 Raphael Beck
 
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
 
       http://www.apache.org/licenses/LICENSE-2.0
 
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
 
#ifndef GLITCHEDHTTPS_STRUTIL_H
#define GLITCHEDHTTPS_STRUTIL_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <ctype.h>
#include <string.h>
 
GLITCHEDHTTPS_API int glitchedhttps_strncmpic(const char* str1, const char* str2, size_t n)
{
    size_t cmp = 0;
    int ret = INT_MIN;
 
    if (str1 == NULL || str2 == NULL)
    {
        return ret;
    }
 
    while ((*str1 || *str2) && cmp < n)
    {
        if ((ret = tolower((int)(*str1)) - tolower((int)(*str2))) != 0)
        {
            break;
        }
        ++cmp;
        ++str1;
        ++str2;
    }
 
    return ret;
}
 
static inline int glitchedhttps_is_http(const char* url)
{
    return strlen(url) >= 7 && strncmp(url, "http://", 7) == 0;
}
 
static inline int glitchedhttps_is_https(const char* url)
{
    return strlen(url) >= 8 && strncmp(url, "https://", 8) == 0;
}
 
static inline size_t glitchedhttps_count_digits(const size_t number)
{
    size_t n = number, digits = 0;
    while (n != 0)
    {
        n /= 10;
        ++digits;
    }
    return digits;
}
 
#ifdef __cplusplus
} // extern "C"
#endif
 
#endif // GLITCHEDHTTPS_STRUTIL_H