fido-sbrk.c « m68k « libgloss - cygwin.com/git/newlib-cygwin.git - Unnamed repository; edit this file 'description' to name the repository.

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#include <stddef.h>

extern char _end[];
static char *curbrk = _end;
extern char _heapend;   /* End of heap              */

void *
sbrk (ptrdiff_t incr)
{
  char *oldbrk = curbrk;
  if (curbrk + incr > &_heapend)
    return (void *) -1;
  curbrk += incr;
  return oldbrk;
}