Adding upstream version 1:2.3.21+dfsg1.upstream/1%2.3.21+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 268 insertions, 0 deletions

diff --git a/src/lib/byteorder.h b/src/lib/byteorder.h
new file mode 100644
index 0000000..e7912bd
--- /dev/null
+++ b/src/lib/byteorder.h
@@ -0,0 +1,268 @@
+/*
+ * Copyright (c) 2016-2017 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef BYTEORDER_H
+#define BYTEORDER_H
+
+/*
+ * These prototypes exist to catch bugs in the code generating macros below.
+ */
+/* return byte swapped input */
+static inline uint64_t i_bswap_64(uint64_t in);
+static inline uint32_t i_bswap_32(uint32_t in);
+static inline uint16_t i_bswap_16(uint16_t in);
+static inline uint8_t i_bswap_8(uint8_t in);
+
+/* load an unaligned cpu native endian number from memory */
+static inline uint64_t cpu64_to_cpu_unaligned(const void *in);
+static inline uint32_t cpu32_to_cpu_unaligned(const void *in);
+static inline uint16_t cpu16_to_cpu_unaligned(const void *in);
+static inline uint8_t cpu8_to_cpu_unaligned(const void *in);
+
+/* load an unaligned big endian number from memory */
+static inline uint64_t be64_to_cpu_unaligned(const void *in);
+static inline uint32_t be32_to_cpu_unaligned(const void *in);
+static inline uint16_t be16_to_cpu_unaligned(const void *in);
+static inline uint8_t be8_to_cpu_unaligned(const void *in);
+
+/* load an unaligned little endian number from memory */
+static inline uint64_t le64_to_cpu_unaligned(const void *in);
+static inline uint32_t le32_to_cpu_unaligned(const void *in);
+static inline uint16_t le16_to_cpu_unaligned(const void *in);
+static inline uint8_t le8_to_cpu_unaligned(const void *in);
+
+/* store into memory a cpu native endian number as a big endian number */
+static inline void cpu64_to_be_unaligned(uint64_t in, void *out);
+static inline void cpu32_to_be_unaligned(uint32_t in, void *out);
+static inline void cpu16_to_be_unaligned(uint16_t in, void *out);
+static inline void cpu8_to_be_unaligned(uint8_t in, void *out);
+
+/* store into memory a cpu native endian number as a little endian number */
+static inline void cpu64_to_le_unaligned(uint64_t in, void *out);
+static inline void cpu32_to_le_unaligned(uint32_t in, void *out);
+static inline void cpu16_to_le_unaligned(uint16_t in, void *out);
+static inline void cpu8_to_le_unaligned(uint8_t in, void *out);
+
+/* convert a big endian input into cpu native endian */
+static inline uint64_t be64_to_cpu(uint64_t in);
+static inline uint32_t be32_to_cpu(uint32_t in);
+static inline uint16_t be16_to_cpu(uint16_t in);
+static inline uint8_t be8_to_cpu(uint8_t in);
+
+/* convert a cpu native endian input into big endian */
+static inline uint64_t cpu64_to_be(uint64_t in);
+static inline uint32_t cpu32_to_be(uint32_t in);
+static inline uint16_t cpu16_to_be(uint16_t in);
+static inline uint8_t cpu8_to_be(uint8_t in);
+
+/* convert a little endian input into cpu native endian */
+static inline uint64_t le64_to_cpu(uint64_t in);
+static inline uint32_t le32_to_cpu(uint32_t in);
+static inline uint16_t le16_to_cpu(uint16_t in);
+static inline uint8_t le8_to_cpu(uint8_t in);
+
+/* convert a cpu native endian input into little endian */
+static inline uint64_t cpu64_to_le(uint64_t in);
+static inline uint32_t cpu32_to_le(uint32_t in);
+static inline uint16_t cpu16_to_le(uint16_t in);
+static inline uint8_t cpu8_to_le(uint8_t in);
+
+/*
+ * byte swapping
+ */
+static inline uint64_t i_bswap_64(uint64_t in)
+{
+	return ((in & 0xff00000000000000ULL) >> 56) |
+	       ((in & 0x00ff000000000000ULL) >> 40) |
+	       ((in & 0x0000ff0000000000ULL) >> 24) |
+	       ((in & 0x000000ff00000000ULL) >> 8) |
+	       ((in & 0x00000000ff000000ULL) << 8) |
+	       ((in & 0x0000000000ff0000ULL) << 24) |
+	       ((in & 0x000000000000ff00ULL) << 40) |
+	       ((in & 0x00000000000000ffULL) << 56);
+}
+
+static inline uint32_t i_bswap_32(uint32_t in)
+{
+	return ((in & 0xff000000) >> 24) |
+	       ((in & 0x00ff0000) >> 8) |
+	       ((in & 0x0000ff00) << 8) |
+	       ((in & 0x000000ff) << 24);
+}
+
+static inline uint16_t i_bswap_16(uint16_t in)
+{
+	return ((in & 0xff00) >> 8) |
+	       ((in & 0x00ff) << 8);
+}
+
+static inline uint8_t i_bswap_8(uint8_t in)
+{
+	return (in & 0xff);
+}
+
+/*
+ * unaligned big-endian integer
+ */
+static inline uint64_t be64_to_cpu_unaligned(const void *in)
+{
+	const uint8_t *p = (const uint8_t *) in;
+
+	return (((uint64_t) p[0] << 56) |
+		((uint64_t) p[1] << 48) |
+		((uint64_t) p[2] << 40) |
+		((uint64_t) p[3] << 32) |
+		((uint64_t) p[4] << 24) |
+		((uint64_t) p[5] << 16) |
+		((uint64_t) p[6] << 8) |
+		((uint64_t) p[7]));
+}
+
+static inline void cpu64_to_be_unaligned(uint64_t in, void *out)
+{
+	uint8_t *p = (uint8_t *) out;
+
+	p[0] = (in >> 56) & 0xff;
+	p[1] = (in >> 48) & 0xff;
+	p[2] = (in >> 40) & 0xff;
+	p[3] = (in >> 32) & 0xff;
+	p[4] = (in >> 24) & 0xff;
+	p[5] = (in >> 16) & 0xff;
+	p[6] = (in >> 8) & 0xff;
+	p[7] = in & 0xff;
+}
+
+static inline uint32_t be32_to_cpu_unaligned(const void *in)
+{
+	const uint8_t *p = (const uint8_t *) in;
+
+	return (((uint32_t) p[0] << 24) |
+		((uint32_t) p[1] << 16) |
+		((uint32_t) p[2] << 8) |
+		((uint32_t) p[3]));
+}
+
+static inline void cpu32_to_be_unaligned(uint32_t in, void *out)
+{
+	uint8_t *p = (uint8_t *) out;
+
+	p[0] = (in >> 24) & 0xff;
+	p[1] = (in >> 16) & 0xff;
+	p[2] = (in >> 8) & 0xff;
+	p[3] = in & 0xff;
+}
+
+static inline uint16_t be16_to_cpu_unaligned(const void *in)
+{
+	const uint8_t *p = (const uint8_t *) in;
+
+	return (((uint16_t) p[0] << 8) |
+		((uint16_t) p[1]));
+}
+
+static inline void cpu16_to_be_unaligned(uint16_t in, void *out)
+{
+	uint8_t *p = (uint8_t *) out;
+
+	p[0] = (in >> 8) & 0xff;
+	p[1] = in & 0xff;
+}
+
+static inline uint8_t be8_to_cpu_unaligned(const void *in)
+{
+	return *((const uint8_t *) in);
+}
+
+static inline void cpu8_to_be_unaligned(uint8_t in, void *out)
+{
+	uint8_t *p = (uint8_t *) out;
+
+	*p = in;
+}
+
+/*
+ * unaligned little-endian & cpu-endian integers
+ */
+#define __GEN(size, bswap)						\
+static inline uint##size##_t le##size##_to_cpu_unaligned(const void *in)\
+{									\
+	uint##size##_t x = be##size##_to_cpu_unaligned(in);		\
+	/* we read a LE int as BE, so we always have to byte swap */	\
+	return i_bswap_##size(x);						\
+}									\
+static inline void cpu##size##_to_le_unaligned(uint##size##_t in,	\
+					       void *out)		\
+{									\
+	/* we'll be writing in BE, so we always have to byte swap */	\
+	cpu##size##_to_be_unaligned(i_bswap_##size(in), out);		\
+}									\
+static inline uint##size##_t cpu##size##_to_cpu_unaligned(const void *in)\
+{									\
+	uint##size##_t x = be##size##_to_cpu_unaligned(in);		\
+	return bswap;							\
+}
+
+#ifdef WORDS_BIGENDIAN
+#define GEN(size)	__GEN(size, x)
+#else
+#define GEN(size)	__GEN(size, i_bswap_##size(x))
+#endif
+
+GEN(64)
+GEN(32)
+GEN(16)
+GEN(8)
+
+#undef __GEN
+#undef GEN
+
+/*
+ * byte ordering
+ */
+#define ___GEN(from, size, to, bswap)					\
+static inline uint##size##_t from##size##_to_##to(uint##size##_t x)	\
+{									\
+	return bswap;							\
+}
+
+#ifdef WORDS_BIGENDIAN
+#define __GEN(from, size, to, be, le) ___GEN(from, size, to, be)
+#else
+#define __GEN(from, size, to, be, le) ___GEN(from, size, to, le)
+#endif
+
+#define GEN(size)							\
+	__GEN(be,  size, cpu, x, i_bswap_##size(x))			\
+	__GEN(cpu, size, be,  x, i_bswap_##size(x))			\
+	__GEN(le,  size, cpu, i_bswap_##size(x), x)			\
+	__GEN(cpu, size, le,  i_bswap_##size(x), x)
+
+GEN(64)
+GEN(32)
+GEN(16)
+GEN(8)
+
+#undef ___GEN
+#undef __GEN
+#undef GEN
+
+#endif