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- /*
- * Copyright (c) 1995 Colin Plumb. All rights reserved.
- * For licensing and other legal details, see the file legal.c.
- *
- * Operations on the usual buffers of bytes
- */
- #ifndef BNSECURE
- #define BNSECURE 1
- #endif
- /*
- * These operations act on buffers of memory, just like malloc & free.
- * One exception: it is not legal to pass a NULL pointer to lbnMemFree.
- */
- #ifndef lbnMemAlloc
- void *lbnMemAlloc(unsigned bytes);
- #endif
- #ifndef lbnMemFree
- void lbnMemFree(void *ptr, unsigned bytes);
- #endif
- /* This wipes out a buffer of bytes if necessary needed. */
- #ifndef lbnMemWipe
- #if BNSECURE
- void lbnMemWipe(void *ptr, unsigned bytes);
- #else
- #define lbnMemWipe(ptr, bytes) (void)(ptr,bytes)
- #endif
- #endif /* !lbnMemWipe */
- /*
- * lbnRealloc is NOT like realloc(); it's endian-sensitive!
- * If lbnMemRealloc is #defined, lbnRealloc will be defined in terms of it.
- * It is legal to pass a NULL pointer to lbnRealloc, although oldbytes
- * will always be sero.
- */
- #ifndef lbnRealloc
- void *lbnRealloc(void *ptr, unsigned oldbytes, unsigned newbytes);
- #endif
- /*
- * These macros are the ones actually used most often in the math library.
- * They take and return pointers to the *end* of the given buffer, and
- * take sizes in terms of words, not bytes.
- *
- * Note that LBNALLOC takes the pointer as an argument instead of returning
- * the value.
- *
- * Note also that these macros are only useable if you have included
- * lbn.h (for the BIG and BIGLITTLE macros), which this file does NOT include.
- */
- #define LBNALLOC(p,type,words) BIGLITTLE( \
- if ( ((p) = (type *)lbnMemAlloc((words)*sizeof*(p))) != 0) \
- (p) += (words), \
- (p) = (type *)lbnMemAlloc((words) * sizeof*(p)) \
- )
- #define LBNFREE(p,words) lbnMemFree((p) BIG(-(words)), (words) * sizeof*(p))
- #define LBNREALLOC(p,old,new) \
- lbnRealloc(p, (old) * sizeof*(p), (new) * sizeof*(p))
- #define LBNWIPE(p,words) lbnMemWipe((p) BIG(-(words)), (words) * sizeof*(p))
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