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* uhd: Replace include guards with pragma onceLane Kolbly2020-04-081-4/+1
| | | | | Pragma once is the more modern version of include guards, eliminating any potential problems with mistyping include guards. Let's use those.
* uhd: paths: Harmonize around XDG Base Directory specificationMartin Braun2020-04-021-0/+22
| | | | | | | | | | | | | | | | | | | | | | Up until now, we completely ignore the XDG specification. This commit does the following to change that: - It uses XDG_DATA_HOME and XDG_CONFIG_HOME for cal and config data, respectively. - If config data is in ~/.uhd/uhd.conf, that is still accepted, but if it conflicts with $XDG_CONFIG_HOME/uhd.conf, it is ignored and a warning is displayed - The default location for cal data is thus ${HOME}/.local/share/uhd/cal on Unix, and %LOCALAPPDATA%\uhd\cal on Windows. This is a change in location! - The UHD_CONFIG_DIR environment variable was confusingly named and is now removed. It provided an alternative location than the home directory. The same purpose is now much better served by XDG_DATA_HOME and XDG_CONFIG_HOME. The specification can be found here: specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
* uhd: cal: Use usrp::cal::database instead of CSV filesMartin Braun2020-04-021-0/+2
| | | | | | | | | Now that we have cal::iq_cal and cal::database, there's no need to manually wrangle CSV files for calibration data. This commit replaces all CSV operations with cal::database calls and uses cal::iq_cal as a container. CSV files can still be read, but are considered deprecated.
* uhd: Apply clang-format against all .cpp and .hpp files in host/Martin Braun2020-03-031-7/+6
| | | | | Note: template_lvbitx.{cpp,hpp} need to be excluded from the list of files that clang-format gets applied against.
* lib: Add path_expandvars() internal API callMartin Braun2018-02-201-0/+24