stringutil.h

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/****
 * Sming Framework Project - Open Source framework for high efficiency native ESP8266 development.
 * Created 2015 by Skurydin Alexey
 * http://github.com/SmingHub/Sming
 * All files of the Sming Core are provided under the LGPL v3 license.
 *
 * StringUtil.h
 *
 *  Contains utility functions for working with char strings.
 *
 *  Created on: 26.01.2017
 *  Author: (github.com/)ADiea
 *
 ****/
 
#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "stddef.h"
 
const char* strstri(const char* pString, const char* pToken);
 
#ifndef _GNU_SOURCE
int strcasecmp(const char* s1, const char* s2);
 
void* memmem(const void* haystack, size_t haystacklen, const void* needle, size_t needlelen);
 
void *memrchr(const void *s, int c, size_t n);
 
#endif
 
int memicmp(const void* buf1, const void* buf2, size_t len);
 
static inline char hexchar(unsigned char c)
{
    if(c < 10)
        return '0' + c;
    else if(c <= 15)
        return 'a' + c - 10;
    else
        return '\0';
}
 
static inline signed char unhex(char c)
{
    if(c >= '0' && c <= '9')
        return c - '0';
    else if(c >= 'a' && c <= 'f')
        return 10 + c - 'a';
    else if(c >= 'A' && c <= 'F')
        return 10 + c - 'A';
    else
        return -1;
}
 
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#endif
 
#ifdef __cplusplus
}
#endif