-/* PSPP - computes sample statistics.
- Copyright (C) 2006 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2006, 2011 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef LIBPSPP_INTEGER_FORMAT_H
#define LIBPSPP_INTEGER_FORMAT_H 1
#include <byteswap.h>
#include <stdint.h>
+#include <string.h>
-#include <libpspp/str.h>
+#include "libpspp/str.h"
/* An integer format. */
enum integer_format
#endif
};
-void integer_convert (enum integer_format, const void *,
+void integer_convert (enum integer_format, const void *,
enum integer_format, void *,
size_t);
uint64_t integer_get (enum integer_format, const void *, size_t);
bool integer_identify (uint64_t expected_value, const void *, size_t,
enum integer_format *);
+\f
+/* Returns the 16-bit unsigned integer at P, which need not be aligned. */
+static inline uint16_t
+get_uint16 (const void *p)
+{
+ uint16_t x;
+ memcpy (&x, p, sizeof x);
+ return x;
+}
+
+/* Returns the 32-bit unsigned integer at P, which need not be aligned. */
+static inline uint32_t
+get_uint32 (const void *p)
+{
+ uint32_t x;
+ memcpy (&x, p, sizeof x);
+ return x;
+}
+
+/* Returns the 64-bit unsigned integer at P, which need not be aligned. */
+static inline uint64_t
+get_uint64 (const void *p)
+{
+ uint64_t x;
+ memcpy (&x, p, sizeof x);
+ return x;
+}
+
+/* Stores 16-bit unsigned integer X at P, which need not be aligned. */
+static inline void
+put_uint16 (uint16_t x, void *p)
+{
+ memcpy (p, &x, sizeof x);
+}
+
+/* Stores 32-bit unsigned integer X at P, which need not be aligned. */
+static inline void
+put_uint32 (uint32_t x, void *p)
+{
+ memcpy (p, &x, sizeof x);
+}
+
+/* Stores 64-bit unsigned integer X at P, which need not be aligned. */
+static inline void
+put_uint64 (uint64_t x, void *p)
+{
+ memcpy (p, &x, sizeof x);
+}
+
+/* Returns NATIVE converted to a form that, when stored in
+ memory, will be in little-endian byte order. */
+static inline uint16_t
+native_to_le16 (uint16_t native)
+{
+ return INTEGER_NATIVE == INTEGER_LSB_FIRST ? native : bswap_16 (native);
+}
+
+/* Returns NATIVE converted to a form that, when stored in
+ memory, will be in big-endian byte order. */
+static inline uint16_t
+native_to_be16 (uint16_t native)
+{
+ return INTEGER_NATIVE == INTEGER_MSB_FIRST ? native : bswap_16 (native);
+}
+
+/* Returns NATIVE converted to a form that, when stored in
+ memory, will be in little-endian byte order. */
+static inline uint32_t
+native_to_le32 (uint32_t native)
+{
+ return INTEGER_NATIVE == INTEGER_LSB_FIRST ? native : bswap_32 (native);
+}
+
+/* Returns NATIVE converted to a form that, when stored in
+ memory, will be in big-endian byte order. */
+static inline uint32_t
+native_to_be32 (uint32_t native)
+{
+ return INTEGER_NATIVE == INTEGER_MSB_FIRST ? native : bswap_32 (native);
+}
+
+/* Returns NATIVE converted to a form that, when stored in
+ memory, will be in little-endian byte order. */
+static inline uint64_t
+native_to_le64 (uint64_t native)
+{
+ return INTEGER_NATIVE == INTEGER_LSB_FIRST ? native : bswap_64 (native);
+}
+
+/* Returns NATIVE converted to a form that, when stored in
+ memory, will be in big-endian byte order. */
+static inline uint64_t
+native_to_be64 (uint64_t native)
+{
+ return INTEGER_NATIVE == INTEGER_MSB_FIRST ? native : bswap_64 (native);
+}
+
+/* Given LE, obtained from memory in little-endian format,
+ returns its value. */
+static inline uint16_t
+le_to_native16 (uint16_t le)
+{
+ return INTEGER_NATIVE == INTEGER_LSB_FIRST ? le : bswap_16 (le);
+}
+
+/* Given BE, obtained from memory in big-endian format, returns
+ its value. */
+static inline uint16_t
+be_to_native16 (uint16_t be)
+{
+ return INTEGER_NATIVE == INTEGER_MSB_FIRST ? be : bswap_16 (be);
+}
+
+/* Given LE, obtained from memory in little-endian format,
+ returns its value. */
+static inline uint32_t
+le_to_native32 (uint32_t le)
+{
+ return INTEGER_NATIVE == INTEGER_LSB_FIRST ? le : bswap_32 (le);
+}
+
+/* Given BE, obtained from memory in big-endian format, returns
+ its value. */
+static inline uint32_t
+be_to_native32 (uint32_t be)
+{
+ return INTEGER_NATIVE == INTEGER_MSB_FIRST ? be : bswap_32 (be);
+}
+
+/* Given LE, obtained from memory in little-endian format,
+ returns its value. */
+static inline uint64_t
+le_to_native64 (uint64_t le)
+{
+ return INTEGER_NATIVE == INTEGER_LSB_FIRST ? le : bswap_64 (le);
+}
+
+/* Given BE, obtained from memory in big-endian format, returns
+ its value. */
+static inline uint64_t
+be_to_native64 (uint64_t be)
+{
+ return INTEGER_NATIVE == INTEGER_MSB_FIRST ? be : bswap_64 (be);
+}
+
#endif /* libpspp/integer-format.h */
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