release/src/router/libncurses/ncurses/tinfo/doalloc.c

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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
  31  ****************************************************************************/
  32
  33 /*
  34  * Wrapper for malloc/realloc.  Standard implementations allow realloc with
  35  * a null pointer, but older libraries may not (e.g., SunOS).
  36  *
  37  * Also if realloc fails, we discard the old memory to avoid leaks.
  38  */
  39
  40 #include <curses.priv.h>
  41
  42 MODULE_ID("$Id: doalloc.c,v 1.8 2002/08/31 21:48:11 Philippe.Blain Exp $")
  43
  44 NCURSES_EXPORT(void *)
  45 _nc_doalloc(void *oldp, size_t amount)
  46 {
  47     void *newp;
  48
  49     if (oldp != 0) {
  50         if ((newp = realloc(oldp, amount)) == 0) {
  51             free(oldp);
  52             errno = ENOMEM;     /* just in case 'free' reset */
  53         }
  54     } else {
  55         newp = malloc(amount);
  56     }
  57     return newp;
  58 }
  59
  60 #if !HAVE_STRDUP
  61 NCURSES_EXPORT(char *)
  62 _nc_strdup(const char *src)
  63 {
  64     char *dst;
  65     if (src != 0) {
  66         dst = typeMalloc(char, strlen(src) + 1);
  67         if (dst != 0) {
  68             (void) strcpy(dst, src);
  69         }
  70     } else {
  71         dst = 0;
  72     }
  73     return dst;
  74 }
  75 #endif