summaryrefslogtreecommitdiffstats
path: root/Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h
diff options
context:
space:
mode:
authorTom2011-06-17 18:21:43 +0200
committerTom2011-06-17 18:21:43 +0200
commit8abd9a968f1aaea16239b1de7d627fb54160257f (patch)
treef9e28f25a0e4561c9dd3a1d6b5ba51e6e6954d46 /Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h
parentinitial commit .. (diff)
downloadimsi-catcher-detection-8abd9a968f1aaea16239b1de7d627fb54160257f.tar.gz
imsi-catcher-detection-8abd9a968f1aaea16239b1de7d627fb54160257f.tar.xz
imsi-catcher-detection-8abd9a968f1aaea16239b1de7d627fb54160257f.zip
Initial Commit
Diffstat (limited to 'Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h')
-rw-r--r--Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h b/Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h
new file mode 100644
index 0000000..eb22d07
--- /dev/null
+++ b/Src/osmocom-bb/src/shared/libosmocore/include/osmocom/core/bits.h
@@ -0,0 +1,45 @@
+#ifndef _OSMO_BITS_H
+#define _OSMO_BITS_H
+
+#include <stdint.h>
+
+typedef int8_t sbit_t; /* soft bit (-127...127) */
+typedef uint8_t ubit_t; /* unpacked bit (0 or 1) */
+typedef uint8_t pbit_t; /* packed bis (8 bits in a byte) */
+
+/*
+ NOTE on the endianess of pbit_t:
+ Bits in a pbit_t are ordered MSB first, i.e. 0x80 is the first bit.
+ Bit i in a pbit_t array is array[i/8] & (1<<(7-i%8))
+*/
+
+/* determine how many bytes we would need for 'num_bits' packed bits */
+static inline unsigned int osmo_pbit_bytesize(unsigned int num_bits)
+{
+ unsigned int pbit_bytesize = num_bits / 8;
+
+ if (num_bits % 8)
+ pbit_bytesize++;
+
+ return pbit_bytesize;
+}
+
+/* convert unpacked bits to packed bits, return length in bytes */
+int osmo_ubit2pbit(pbit_t *out, const ubit_t *in, unsigned int num_bits);
+
+/* convert packed bits to unpacked bits, return length in bytes */
+int osmo_pbit2ubit(ubit_t *out, const pbit_t *in, unsigned int num_bits);
+
+/* convert unpacked bits to packed bits (extended options but slower),
+ * return length in bytes (max written ofs of output buffer + 1) */
+int osmo_ubit2pbit_ext(pbit_t *out, unsigned int out_ofs,
+ const ubit_t *in, unsigned int in_ofs,
+ unsigned int num_bits, int lsb_mode);
+
+/* convert packed bits to unpacked bits (extended options but slower),
+ * return length in bytes (max written ofs of output buffer + 1) */
+int osmo_pbit2ubit_ext(ubit_t *out, unsigned int out_ofs,
+ const pbit_t *in, unsigned int in_ofs,
+ unsigned int num_bits, int lsb_mode);
+
+#endif