compat_str.c

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/*
    compat: Some compatibility functions (basic memory and string stuff)
 
    The mpg123 code is determined to keep it's legacy. A legacy of old, old UNIX.
    So anything possibly somewhat advanced should be considered to be put here, with proper #ifdef;-)
 
    copyright 2007-2016 by the mpg123 project - free software under the terms of the LGPL 2.1
    see COPYING and AUTHORS files in distribution or http://mpg123.org
    initially written by Thomas Orgis, Windows Unicode stuff by JonY.
*/
 
#include "compat.h"
#include "debug.h"
 
/* A safe realloc also for very old systems where realloc(NULL, size) returns NULL. */
void *safe_realloc(void *ptr, size_t size)
{
    if(ptr == NULL) return malloc(size);
    else return realloc(ptr, size);
}
 
#ifndef HAVE_STRERROR
const char *strerror(int errnum)
{
    extern int sys_nerr;
    extern char *sys_errlist[];
 
    return (errnum < sys_nerr) ?  sys_errlist[errnum]  :  "";
}
#endif
 
char* compat_strdup(const char *src)
{
    char *dest = NULL;
    if(src)
    {
        size_t len;
        len = strlen(src)+1;
        if((dest = malloc(len)))
            memcpy(dest, src, len);
    }
    return dest;
}