jkalmar
/ stl_bit_functions.cpp
Created
November 10, 2019 21:24
Example of some funtions from c++20 <bit> header
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| /** | |
| * These examples show how to do bit manipulations and operation in C++ | |
| * Standart bit operation are shown as well as utility functions from C++20 STL bit.h | |
| */ | |
| void bit_examples() | |
| { | |
| endian_example(); | |
| uint16_t number = 0x1D10u; // 0b0001110100010000u; |
jkalmar
/ rgba_red_mask.cpp
Created
November 10, 2019 21:21
Example showing how to pick red color value from RGBA variable (32bits)
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| SCENARIO( "Representing colors as RGB with alpha value" ) | |
| { | |
| uint32_t RGBA = 0xE64155FF; // Redish fully opaque color | |
| WHEN( "Need to get RED value" ) | |
| { | |
| // Lets first prepare the mask, remember that bitwise AND works 1 & 1 = 1 and everything | |
| // else is 0 | |
| // We can use this to zero everything else except for RED value | |
| uint32_t mask = 0xFF000000; |
jkalmar
/ bit_operations.cpp
Created
November 10, 2019 21:01
Example of 6 build in bitwise operation in c++
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| SCENARIO( "Bit manipulations" ) | |
| { | |
| // We can also use uint16_t, uint32_t or uint64_t (1B, 4B, 8B) variable | |
| uint8_t bits = 0b01001011u; | |
| SECTION( "Bitwise AND" ) | |
| { | |
| uint8_t mask = 0x0F; // 0b00001111 | |
| uint8_t result = bits & mask; |
jkalmar
/ PDUSessionResourceSetupRequestTransfer
Last active
March 20, 2019 18:54
Nokalva parsed hex
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| rec1value PDUSessionResourceSetupRequestTransfer ::= | |
| { | |
| --TYPE INFORMATION: SEQUENCE | |
| --OFFSET: 0,0 | |
| --extension flag: <.0> | |
| protocolIEs | |
| { | |
| --TYPE INFORMATION: SEQUENCE (SIZE(0..65535)) OF | |
| --OFFSET: 0,1 | |
| --padding: <0000000> |
jkalmar
/ asn_debug.txt
Created
March 20, 2019 17:28
Debug info for 5g N2 asn1c failed decoded message
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| jkalmar@supercomp:~/projects/5g/app/build> ./app -iaper in.hex -dd | |
| AD: Processing in.hex | |
| AD: Decoding 61 bytes | |
| Decoding PDUSessionResourceSetupRequestTransfer as SEQUENCE (APER) (/home/jkalmar/projects/5g/app/constr_SEQUENCE.c:1509) | |
| [PER got 1<=488 bits => span 1 +0[1..488]:00 (487) => 0x0] (/home/jkalmar/projects/5g/app/asn_bit_data.c:139) | |
| Decoding member "protocolIEs" in PDUSessionResourceSetupRequestTransfer (/home/jkalmar/projects/5g/app/constr_SEQUENCE.c:1599) | |
| getting nsnnwn with range 65536 (/home/jkalmar/projects/5g/app/per_support.c:361) | |
| Aligning 7 bits (/home/jkalmar/projects/5g/app/per_support.c:301) | |
| [PER got 7<=487 bits => span 8 +0[8..488]:00 (480) => 0x0] (/home/jkalmar/projects/5g/app/asn_bit_data.c:139) | |
| [PER got 16<=480 bits => span 24 +1[16..480]:00 (464) => 0x4] (/home/jkalmar/projects/5g/app/asn_bit_data.c:139) |
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| #include <PDUSessionResourceSetupRequestTransfer.h> | |
| void testAsn( void ) | |
| { | |
| char theData[] = | |
| { | |
| 0x00, 0x00, 0x04, 0x00, 0x82, 0x00, 0x08, 0x08, | |
| 0x1e, 0x84, 0x80, 0x20, 0x3d, 0x09, 0x00, 0x00, | |
| 0x86, 0x00, 0x01, 0x00, 0x00, 0x8b, 0x00, 0x1a, | |
| 0x09, 0xf0, 0x11, 0x46, 0x10, 0x10, 0x3f, 0xfe, |