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562
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1 /*
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2 compat: Some compatibility functions. Basic standard C stuff, that may barely be above/around C89.
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3
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4 The mpg123 code is determined to keep it's legacy. A legacy of old, old UNIX.
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5
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6 copyright 2007-8 by the mpg123 project - free software under the terms of the LGPL 2.1
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7 see COPYING and AUTHORS files in distribution or http://mpg123.org
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8 initially written by Thomas Orgis
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9 */
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10
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11 #include "config.h"
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12 #include "compat.h"
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13
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14 /* A safe realloc also for very old systems where realloc(NULL, size) returns NULL. */
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15 void *safe_realloc(void *ptr, size_t size)
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16 {
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17 if(ptr == NULL) return malloc(size);
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18 else return realloc(ptr, size);
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19 }
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20
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21 #ifndef HAVE_STRERROR
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22 const char *strerror(int errnum)
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23 {
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24 extern int sys_nerr;
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25 extern char *sys_errlist[];
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26
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27 return (errnum < sys_nerr) ? sys_errlist[errnum] : "";
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28 }
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29 #endif
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30
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31 #ifndef HAVE_STRDUP
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32 char *strdup(const char *src)
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33 {
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34 char *dest;
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35
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36 if (!(dest = (char *) malloc(strlen(src)+1)))
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37 return NULL;
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38 else
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39 return strcpy(dest, src);
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40 }
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41 #endif
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