endian.c/h -> endianconv.c/h to avoid issues with broken libraries se…

…arch paths.

src/Makefile

@@ -73,7 +73,7 @@ QUIET_CC = @printf '    %b %b\n' $(CCCOLOR)CC$(ENDCOLOR) $(SRCCOLOR)$@$(ENDCOLOR
 QUIET_LINK = @printf '    %b %b\n' $(LINKCOLOR)LINK$(ENDCOLOR) $(BINCOLOR)$@$(ENDCOLOR);
 endif
 
-OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o lzf_c.o lzf_d.o pqsort.o zipmap.o sha1.o ziplist.o release.o networking.o util.o object.o db.o replication.o rdb.o t_string.o t_list.o t_set.o t_zset.o t_hash.o config.o aof.o pubsub.o multi.o debug.o sort.o intset.o syncio.o cluster.o crc16.o endian.o slowlog.o scripting.o bio.o rio.o rand.o
+OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o lzf_c.o lzf_d.o pqsort.o zipmap.o sha1.o ziplist.o release.o networking.o util.o object.o db.o replication.o rdb.o t_string.o t_list.o t_set.o t_zset.o t_hash.o config.o aof.o pubsub.o multi.o debug.o sort.o intset.o syncio.o cluster.o crc16.o endianconv.o slowlog.o scripting.o bio.o rio.o rand.o
 BENCHOBJ = ae.o anet.o redis-benchmark.o sds.o adlist.o zmalloc.o
 CLIOBJ = anet.o sds.o adlist.o redis-cli.o zmalloc.o release.o
 CHECKDUMPOBJ = redis-check-dump.o lzf_c.o lzf_d.o
@@ -112,8 +112,8 @@ db.o: db.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
 debug.o: debug.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
   zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h sha1.h
 dict.o: dict.c fmacros.h dict.h zmalloc.h
-endian.o: endian.c
-intset.o: intset.c intset.h zmalloc.h endian.h
+endianconv.o: endianconv.c
+intset.o: intset.c intset.h zmalloc.h endianconv.h
 lzf_c.o: lzf_c.c lzfP.h
 lzf_d.o: lzf_d.c lzfP.h
 multi.o: multi.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
@@ -163,8 +163,8 @@ t_string.o: t_string.c redis.h fmacros.h config.h ae.h sds.h dict.h \
 t_zset.o: t_zset.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
   zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
 util.o: util.c fmacros.h util.h
-ziplist.o: ziplist.c zmalloc.h util.h ziplist.h endian.h
-zipmap.o: zipmap.c zmalloc.h endian.h
+ziplist.o: ziplist.c zmalloc.h util.h ziplist.h endianconv.h
+zipmap.o: zipmap.c zmalloc.h endianconv.h
 zmalloc.o: zmalloc.c config.h zmalloc.h
 
 # Clean local objects when ARCH is different

src/endianconv.c

@@ -0,0 +1,124 @@
+/* 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 serialied on RDB files directly with a single
+ * write(2) without other additional steps.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2011-2012, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#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 TESTMAIN
+#include <stdio.h>
+
+int main(void) {
+    char buf[32];
+
+    sprintf(buf,"ciaoroma");
+    memrev16(buf);
+    printf("%s\n", buf);
+
+    sprintf(buf,"ciaoroma");
+    memrev32(buf);
+    printf("%s\n", buf);
+
+    sprintf(buf,"ciaoroma");
+    memrev64(buf);
+    printf("%s\n", buf);
+
+    return 0;
+}
+#endif

src/endianconv.h

@@ -0,0 +1,61 @@
+/* See endianconv.c top comments for more information
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2011-2012, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */ 
+
+#ifndef __ENDIANCONV_H
+#define __ENDIANCONV_H
+
+void memrev16(void *p);
+void memrev32(void *p);
+void memrev64(void *p);
+uint16_t intrev16(uint16_t v);
+uint32_t intrev32(uint32_t v);
+uint64_t intrev64(uint64_t v);
+
+/* variants of the function doing the actual convertion only if the target
+ * host is big endian */
+#if (BYTE_ORDER == LITTLE_ENDIAN)
+#define memrev16ifbe(p)
+#define memrev32ifbe(p)
+#define memrev64ifbe(p)
+#define intrev16ifbe(v) (v)
+#define intrev32ifbe(v) (v)
+#define intrev64ifbe(v) (v)
+#else
+#define memrev16ifbe(p) memrev16(p)
+#define memrev32ifbe(p) memrev32(p)
+#define memrev64ifbe(p) memrev64(p)
+#define intrev16ifbe(v) intrev16(v)
+#define intrev32ifbe(v) intrev32(v)
+#define intrev64ifbe(v) intrev64(v)
+#endif
+
+#endif

src/intset.c

@@ -3,7 +3,7 @@
 #include <string.h>
 #include "intset.h"
 #include "zmalloc.h"
-#include "endian.h"
+#include "endianconv.h"
 
 /* Note that these encodings are ordered, so:
  * INTSET_ENC_INT16 < INTSET_ENC_INT32 < INTSET_ENC_INT64. */

src/ziplist.c

@@ -69,7 +69,7 @@
 #include "zmalloc.h"
 #include "util.h"
 #include "ziplist.h"
-#include "endian.h"
+#include "endianconv.h"
 
 #define ZIP_END 255
 #define ZIP_BIGLEN 254

src/zipmap.c

@@ -80,7 +80,7 @@
 #include <string.h>
 #include <assert.h>
 #include "zmalloc.h"
-#include "endian.h"
+#include "endianconv.h"
 
 #define ZIPMAP_BIGLEN 254
 #define ZIPMAP_END 255