src/timezone/ialloc.c

   1 /*
   2  * This file is in the public domain, so clarified as of
   3  * 2006-07-17 by Arthur David Olson.
   4  *
   5  * IDENTIFICATION
   6  *        $PostgreSQL$
   7  */
   8
   9 #include "postgres_fe.h"
  10
  11 #include "private.h"
  12
  13
  14 #define nonzero(n)      (((n) == 0) ? 1 : (n))
  15
  16 char *
  17 imalloc(int n)
  18 {
  19         return malloc((size_t) nonzero(n));
  20 }
  21
  22 char *
  23 icalloc(int nelem, int elsize)
  24 {
  25         if (nelem == 0 || elsize == 0)
  26                 nelem = elsize = 1;
  27         return calloc((size_t) nelem, (size_t) elsize);
  28 }
  29
  30 void *
  31 irealloc(void *pointer, int size)
  32 {
  33         if (pointer == NULL)
  34                 return imalloc(size);
  35         return realloc((void *) pointer, (size_t) nonzero(size));
  36 }
  37
  38 char *
  39 icatalloc(char *old, const char *new)
  40 {
  41         char       *result;
  42         int                     oldsize,
  43                                 newsize;
  44
  45         newsize = (new == NULL) ? 0 : strlen(new);
  46         if (old == NULL)
  47                 oldsize = 0;
  48         else if (newsize == 0)
  49                 return old;
  50         else
  51                 oldsize = strlen(old);
  52         if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
  53                 if (new != NULL)
  54                         (void) strcpy(result + oldsize, new);
  55         return result;
  56 }
  57
  58 char *
  59 icpyalloc(const char *string)
  60 {
  61         return icatalloc((char *) NULL, string);
  62 }
  63
  64 void
  65 ifree(char *p)
  66 {
  67         if (p != NULL)
  68                 (void) free(p);
  69 }
  70
  71 void
  72 icfree(char *p)
  73 {
  74         if (p != NULL)
  75                 (void) free(p);
  76 }