The .xz file format
How do I uncompress a tarball that uses .xz?
How to XZ a directory with TAR using maximum compression?
Monthly Archives: January 2014
Canon CanoScan 3000 F
Windows
Linux
CanoScan 3000F USB => Unsupported
# Canon CanoScan 3000F ATTRS{idVendor}=="04a9", ATTRS{idProduct}=="2215", ENV{libsane_matched}="yes"
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", MODE="0666"
Byte Stream to Hex String
Perl one-liner
$ cat message.txt | perl -pe 's/([0-9a-f]{2})/0x$1, /g' 0x00, 0xc0, 0x3a, 0x70, 0x1e, 0x79, 0x00, 0xc0, 0x3a, 0x70, 0x2d, 0x29, 0x08, 0x00, 0x45, 0x00, 0x00, 0x60, 0x2c, 0xc0, 0x00, 0x00, 0x3c, 0x11, 0xba, 0x74, 0xc0, 0xa8, 0x0b, 0x05, 0xc0, 0xa8, 0x0b, 0x03, 0x04, 0x30, 0x59, 0xd9, 0x00, 0x4c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x54, 0x96, 0x06, 0xc8, 0x5f, 0x9b, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x02,
jEdit BeanShell
26 08 00 11 00 00 00 00 00 00 00 1c 72 65 73 74 72 69 63 74 20 31 39 32 2e 31 36 38 2e 37 2e 38 20 76 65 72 73 69 6f 6e 00 00 00 0a 86 be ad 02 89 51 bb 99 9d 7f 15 71 c6 a2 cf d4
Search: [0-9a-z][0-9a-z] Replace: "0x"+_0+","
0x26, 0x08, 0x00, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x72, 0x65, 0x73, 0x74, 0x72, 0x69, 0x63, 0x74, 0x20, 0x31, 0x39, 0x32, 0x2e, 0x31, 0x36, 0x38, 0x2e, 0x37, 0x2e, 0x38, 0x20, 0x76, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x0a, 0x86, 0xbe, 0xad, 0x02, 0x89, 0x51, 0xbb, 0x99, 0x9d, 0x7f, 0x15, 0x71, 0xc6, 0xa2, 0xcf, 0xd4,
Variable Length String in C
There is no need to construct a special format string.
printf allows you to specify the precision using a parameter (that precedes the value)
if you use a .* as the precision in the format tag.
For example:
printf ("%d %.*s", number, SIZE, letters);
stackoverflow
Eclipse Indigo SP2 doesn’t know uint8_t
How do I test the current version of GCC?
__GNUC__ = 4 // major __GNUC_MINOR__ = 8 // minor __GNUC_PATCHLEVEL__ // patch
Multiple “could not be resolved” problems using Eclipse with minGW
Go to Project -> Properties -> C/C++ General -> Preprocessor Include Paths, Macros, etc. -> Providers -> CDT GCC built-in compiler settings, deactivate Use global provider shared between projects and add the command line argument -std=c++11.
Eclipse 3.7.0 Indigo with CDT shows many false compilation errors
/usr/include/c++/4.6.1 /usr/include/ /usr/include/c++ /usr/include/c++/4.6 /usr/include/x86_64-linux-gnu /usr/include/asm-generic /usr/include/c++/4.6.1/x86_64-linux-gnu/
File doesn't include these definitions /opt/altera12.1sp1/nios2eds/bin/gnu/H-i686-pc-linux-gnu/nios2-elf/include/sys/config.h __LONG_LONG_MAX__ = 9223372036854775807LL __LONG_MAX__ = 2147483647L __WCHAR_MAX__ = 2147483647L __INT_MAX__ = 2147483647L __SHRT_MAX__ = 32767L __SCHAR_MAX__ = 127L
Eclipse CDT Project Properties (nios2_limits.xml)
Vi / Vim “VIsual IMproved”
:%s/foo/bar/g Find each occurrence of 'foo' (in all lines), and replace it with 'bar'. :s/foo/bar/g Find each occurrence of 'foo' (in the current line only), and replace it with 'bar'. :%s/foo/bar/gc Change each 'foo' to 'bar', but ask for confirmation first. :%s/\<foo\>/bar/gc Change only whole words exactly matching 'foo' to 'bar'; ask for confirmation. :%s/foo/bar/gci Change each 'foo' (case insensitive) to 'bar'; ask for confirmation. This may be wanted after using :set noignorecase to make searches case sensitive (the default). :%s/foo/bar/gcI Change each 'foo' (case sensitive) to 'bar'; ask for confirmation. This may be wanted after using :set ignorecase to make searches case insensitive.
Convert the line endings from DOS to UNIX format
CR = Carriage Return
LF = Line Feed
Betriebssystem | Zeichensatz | Abkürzung | Code Hex | Code Dezimal | Escape-Sequenz |
Unix, Linux, Android, Mac OS X, AmigaOS, BSD | ASCII | LF | 0A | 10 | \n |
Windows, DOS, OS/2, CP/M, TOS (Atari) | ASCII | CR LF | 0D 0A | 13 10 | \r\n |
Mac OS bis Version 9, Apple II, C64 | ASCII | CR | 0D | 13 | \r |
AIX OS & OS/390 | EBCDIC | NEL | 15 | 21 | \025 |
sed
NAME sed - stream editor for filtering and transforming text DESCRIPTION Sed is a stream editor. A stream editor is used to perform basic text transformations on an input stream.
# DOS => UNIX # replace every "\r" with "" $ sed "s/\r//" infile >outfile # UNIX => DOS # add in every line-end (RegEx $) before \n the character \r $ sed "s/$/\r/" infile >outfile
How to convert DOS/Windows newline to Unix newline in bash script?
sed Tutorium – Eine Einführung in sed
Useful one-line scripts for sed
tr
NAME tr - translate or delete characters DESCRIPTION Translate, squeeze, and/or delete characters from standard input, writing to standard output.
# delete every "\r" tr -d \r <infile >outfile
Bash Script String List
#!/bin/bash FILES=\ "AAA "\ "BBB "\ "CCC "\ "DDD "\ "EEE " for FILE in $FILES do echo "# $FILE" done
# AAA # BBB # CCC # DDD # EEE
Text Encoding Convertor
$ find . -exec file {} \; $ iconv -f UTF-8 -t ISO-8859-15 in.txt > out.txt $ iconv -t ISO-8859-15 in.txt > out.txt # ohne input-encoding $ iconv --from-code UTF-8 --to-code ISO-8859-15 in.txt > out.txt
stackoverflow
Best way to convert text files between character sets?
How to convert ISO8859-15 to UTF8
Linux: Converting a file encoded in ISO-8859-1 to UTF-8
SDRAM Timings
Mit der Column Address Strobe Latency (englisch, kurz CL oder CAS Latency), auch Speicherlatenz genannt, wird die Verzögerung zwischen der Adressierung in einem DRAM-Baustein und der Bereitstellung der an dieser Adresse gespeicherten Daten bezeichnet. Die CL gibt an, wie viele Taktzyklen der Speicherbaustein benötigt, um die während des CAS gelieferten Daten zu verarbeiten, bevor er weitere Befehle entgegennehmen, bzw. das Ergebnis mitteilen kann. Je höher der CL-Wert, desto mehr Taktzyklen werden für die Verarbeitung benötigt, womit auch die davon abhängende Verzögerung größer wird.
Wikipedia
Column Address Strobe Latency
Dymanic Random Access Memory (DRAM) # CAS