1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gclib/mem.c	Tue Jan 24 23:54:05 2012 +0000
     1.3 @@ -0,0 +1,54 @@
     1.4 +#include <stdlib.h>
     1.5 +#include <stdio.h>
     1.6 +#include <string.h>
     1.7 +#include <gclib/mem.h>
     1.8 +
     1.9 +/*
    1.10 + * A memory allocator that aborts on failure (so that the caller never
    1.11 + * needs to handle out of memory, which we assume is very unlikely to
    1.12 + * happen under normal circumstances on any modern machine).
    1.13 + */
    1.14 +void *mem_alloc(size_t nmemb,size_t size)
    1.15 +{
    1.16 +    void *ptr=malloc(nmemb*size);
    1.17 +    if (!ptr)
    1.18 +    {
    1.19 +	fprintf(stderr,
    1.20 +	  "Not enough memory to allocate %lu elements of %lu bytes.\n",
    1.21 +	  (unsigned long)nmemb,(unsigned long)size);
    1.22 +	abort();
    1.23 +    }
    1.24 +    return ptr;
    1.25 +}
    1.26 +
    1.27 +/*
    1.28 + * As mem_new, but new memory is cleared to zero.
    1.29 + */
    1.30 +void *mem_alloc0(size_t nmemb,size_t size)
    1.31 +{
    1.32 +    void *ptr=calloc(nmemb,size);
    1.33 +    if (!ptr)
    1.34 +    {
    1.35 +	fprintf(stderr,
    1.36 +	  "Not enough memory to allocate %lu elements of %lu bytes.\n",
    1.37 +	  (unsigned long)nmemb,(unsigned long)size);
    1.38 +	abort();
    1.39 +    }
    1.40 +    return ptr;
    1.41 +}
    1.42 +
    1.43 +/*
    1.44 + * Grow or shrink a memory block, aborting on failure.
    1.45 + */
    1.46 +void *mem_realloc(void *ptr,size_t nmemb,size_t size)
    1.47 +{
    1.48 +    ptr=realloc(ptr,nmemb*size);
    1.49 +    if (!ptr)
    1.50 +    {
    1.51 +	fprintf(stderr,
    1.52 +	  "Not enough memory to allocate %lu elements of %lu bytes.\n",
    1.53 +	  (unsigned long)nmemb,(unsigned long)size);
    1.54 +	abort();
    1.55 +    }
    1.56 +    return ptr;
    1.57 +}