X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=ucw%2Fcrc.h;h=1aa73dcce7f38594a91519b24f02707b207b0488;hb=0053f1a862cd0c2f359a4d12f0fdd35b17d18906;hp=28d59acf6eba1997f511194ebb33b8af5a8b5c23;hpb=078dd50e9e9d322db3f5ac8d0c434ebeeac10a79;p=libucw.git

diff --git a/ucw/crc.h b/ucw/crc.h
index 28d59acf..1aa73dcc 100644
--- a/ucw/crc.h
+++ b/ucw/crc.h
@@ -16,20 +16,28 @@
  *	Adapted for LibUCW by Martin Mares <mj@ucw.cz> in 2012.
  */
 
+#ifndef _UCW_CRC_H
+#define _UCW_CRC_H
+
+#ifdef CONFIG_UCW_CLEAN_ABI
+#define crc32_hash_buffer ucw_crc32_hash_buffer
+#define crc32_init ucw_crc32_init
+#endif
+
 /**
  * Internal CRC calculator context.
  * You should use it just as an opaque handle only.
  */
 typedef struct crc32_context {
   u32 state;
-  void (*update_func)(struct crc32_context *ctx, const byte *buf, uns len);
+  void (*update_func)(struct crc32_context *ctx, const byte *buf, uint len);
 } crc32_context;
 
 /**
  * Initialize new calculation of CRC in a given context.
  * @crc_mode selects which algorithm should be used.
  **/
-void crc32_init(crc32_context *ctx, uns crc_mode);
+void crc32_init(crc32_context *ctx, uint crc_mode);
 
 /**
  * Algorithm used for CRC calculation. The algorithms differ by the amount
@@ -44,7 +52,7 @@ enum crc_mode {
 };
 
 /** Feed @len bytes starting at @buf to the CRC calculator. **/
-static inline void crc32_update(crc32_context *ctx, const byte *buf, uns len)
+static inline void crc32_update(crc32_context *ctx, const byte *buf, uint len)
 {
   ctx->update_func(ctx, buf, len);
 }
@@ -54,3 +62,16 @@ static inline u32 crc32_final(crc32_context *ctx)
 {
   return ctx->state ^ 0xffffffff;
 }
+
+/**
+ * A convenience one-shot function for CRC.
+ * It is equivalent to this snippet of code:
+ *
+ *  crc32_context ctx;
+ *  crc32_init(&ctx, CRC_MODE_DEFAULT);
+ *  crc32_update(&ctx, buf, len);
+ *  return crc32_final(&ctx);
+ */
+u32 crc32_hash_buffer(const byte *buf, uint len);
+
+#endif