usr/src/cmd/zic/ialloc.c

   1 #pragma ident   "%Z%%M% %I%     %E% SMI"
   2
   3 /* static char  elsieid[] = "@(#)ialloc.c       8.29"; */
   4
   5 /*LINTLIBRARY*/
   6
   7 #include "private.h"
   8
   9 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  10
  11 char *
  12 imalloc(n)
  13 const int       n;
  14 {
  15         return (malloc((size_t) nonzero(n)));
  16 }
  17
  18 void *
  19 irealloc(pointer, size)
  20 void * const    pointer;
  21 const int       size;
  22 {
  23         if (pointer == NULL)
  24                 return (imalloc(size));
  25         return (realloc((void *) pointer, (size_t) nonzero(size)));
  26 }
  27
  28 char *
  29 icatalloc(old, new)
  30 char * const            old;
  31 const char * const      new;
  32 {
  33         register char * result;
  34         register int    oldsize, newsize;
  35
  36         newsize = (new == NULL) ? 0 : strlen(new);
  37         if (old == NULL)
  38                 oldsize = 0;
  39         else if (newsize == 0)
  40                 return (old);
  41         else    oldsize = strlen(old);
  42         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  43                 if (new != NULL)
  44                         (void) strcpy(result + oldsize, new);
  45         return (result);
  46 }
  47
  48 char *
  49 icpyalloc(string)
  50 const char * const      string;
  51 {
  52         return (icatalloc((char *) NULL, string));
  53 }
  54
  55 void
  56 ifree(p)
  57 char * const    p;
  58 {
  59         if (p != NULL)
  60                 (void) free(p);
  61 }