summaryrefslogtreecommitdiff
path: root/examples/redis-unstable/src/endianconv.c
diff options
context:
space:
mode:
Diffstat (limited to 'examples/redis-unstable/src/endianconv.c')
-rw-r--r--examples/redis-unstable/src/endianconv.c109
1 files changed, 0 insertions, 109 deletions
diff --git a/examples/redis-unstable/src/endianconv.c b/examples/redis-unstable/src/endianconv.c
deleted file mode 100644
index 12ee03c..0000000
--- a/examples/redis-unstable/src/endianconv.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/* endinconv.c -- Endian conversions utilities.
- *
- * This functions are never called directly, but always using the macros
- * defined into endianconv.h, this way we define everything is a non-operation
- * if the arch is already little endian.
- *
- * Redis tries to encode everything as little endian (but a few things that need
- * to be backward compatible are still in big endian) because most of the
- * production environments are little endian, and we have a lot of conversions
- * in a few places because ziplists, intsets, zipmaps, need to be endian-neutral
- * even in memory, since they are serialized on RDB files directly with a single
- * write(2) without other additional steps.
- *
- * ----------------------------------------------------------------------------
- *
- * Copyright (c) 2011-Present, Redis Ltd.
- * All rights reserved.
- *
- * Licensed under your choice of (a) the Redis Source Available License 2.0
- * (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
- * GNU Affero General Public License v3 (AGPLv3).
- */
-
-
-#include <stdint.h>
-
-/* Toggle the 16 bit unsigned integer pointed by *p from little endian to
- * big endian */
-void memrev16(void *p) {
- unsigned char *x = p, t;
-
- t = x[0];
- x[0] = x[1];
- x[1] = t;
-}
-
-/* Toggle the 32 bit unsigned integer pointed by *p from little endian to
- * big endian */
-void memrev32(void *p) {
- unsigned char *x = p, t;
-
- t = x[0];
- x[0] = x[3];
- x[3] = t;
- t = x[1];
- x[1] = x[2];
- x[2] = t;
-}
-
-/* Toggle the 64 bit unsigned integer pointed by *p from little endian to
- * big endian */
-void memrev64(void *p) {
- unsigned char *x = p, t;
-
- t = x[0];
- x[0] = x[7];
- x[7] = t;
- t = x[1];
- x[1] = x[6];
- x[6] = t;
- t = x[2];
- x[2] = x[5];
- x[5] = t;
- t = x[3];
- x[3] = x[4];
- x[4] = t;
-}
-
-uint16_t intrev16(uint16_t v) {
- memrev16(&v);
- return v;
-}
-
-uint32_t intrev32(uint32_t v) {
- memrev32(&v);
- return v;
-}
-
-uint64_t intrev64(uint64_t v) {
- memrev64(&v);
- return v;
-}
-
-#ifdef REDIS_TEST
-#include <stdio.h>
-
-#define UNUSED(x) (void)(x)
-int endianconvTest(int argc, char *argv[], int flags) {
- char buf[32];
-
- UNUSED(argc);
- UNUSED(argv);
- UNUSED(flags);
-
- snprintf(buf,sizeof(buf),"ciaoroma");
- memrev16(buf);
- printf("%s\n", buf);
-
- snprintf(buf,sizeof(buf),"ciaoroma");
- memrev32(buf);
- printf("%s\n", buf);
-
- snprintf(buf,sizeof(buf),"ciaoroma");
- memrev64(buf);
- printf("%s\n", buf);
-
- return 0;
-}
-#endif