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-rw-r--r--1.4.23-rc4/include/asterisk/unaligned.h102
1 files changed, 102 insertions, 0 deletions
diff --git a/1.4.23-rc4/include/asterisk/unaligned.h b/1.4.23-rc4/include/asterisk/unaligned.h
new file mode 100644
index 000000000..16791d6f0
--- /dev/null
+++ b/1.4.23-rc4/include/asterisk/unaligned.h
@@ -0,0 +1,102 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ * \brief Handle unaligned data access
+ */
+
+#ifndef _ASTERISK_UNALIGNED_H
+#define _ASTERISK_UNALIGNED_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#ifdef __GNUC__
+/* If we just tell GCC what's going on, we can trust it to behave optimally */
+static inline unsigned int get_unaligned_uint32(void *p)
+{
+ struct { unsigned int d; } __attribute__((packed)) *pp = (void *)p;
+
+ return pp->d;
+}
+static inline unsigned short get_unaligned_uint16(void *p)
+{
+ struct { unsigned short d; } __attribute__((packed)) *pp = (void *)p;
+
+ return pp->d;
+}
+
+static inline void put_unaligned_uint32(void *p, unsigned int datum)
+{
+ struct { unsigned int d; } __attribute__((packed)) *pp = (void *)p;
+
+ pp->d = datum;
+}
+
+static inline void put_unaligned_uint16(void *p, unsigned short datum)
+{
+ struct { unsigned short d; } __attribute__((packed)) *pp = (void *)p;
+
+ pp->d = datum;
+}
+#elif defined(SOLARIS) && defined(__sparc__)
+static inline unsigned int get_unaligned_uint32(void *p)
+{
+ unsigned char *cp = p;
+
+ return (cp[0] << 24) | (cp[1] << 16) | (cp[2] << 8) | cp[3];
+}
+
+static inline unsigned short get_unaligned_uint16(void *p)
+{
+ unsigned char *cp = p;
+
+ return (cp[0] << 8) | cp[1] ;
+}
+
+static inline void put_unaligned_uint32(void *p, unsigned int datum)
+{
+ unsigned char *cp = p;
+
+ cp[0] = datum >> 24;
+ cp[1] = datum >> 16;
+ cp[2] = datum >> 8;
+ cp[3] = datum;
+}
+
+static inline void put_unaligned_uint16(void *p, unsigned int datum)
+{
+ unsigned char *cp = p;
+
+ cp[0] = datum >> 8;
+ cp[1] = datum;
+}
+#else /* Not GCC, not Solaris/SPARC. Assume we can handle direct load/store. */
+#define get_unaligned_uint32(p) (*((unsigned int *)(p)))
+#define get_unaligned_uint16(p) (*((unsigned short *)(p)))
+#define put_unaligned_uint32(p,d) do { unsigned int *__P = (p); *__P = d; } while(0)
+#define put_unaligned_uint16(p,d) do { unsigned short *__P = (p); *__P = d; } while(0)
+#endif
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+
+#endif /* _ASTERISK_UNALIGNED_H */