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2018-04-11Add warn() and die()Laslo Hunhold
To fully centralize this matter these well-tested functions are added to the util.c, and implemented as we know it from many other suckless projects.
2018-04-11Add efread() and efwrite()Laslo Hunhold
Given we have a util.c anyway it does not make any sense to duplicate code here. This way, error handling and output is in one place and one does not have to change things in multiple different files. This also reduces code duplication by a lot. It also solves an older bug where the error reporting was not on point: $ echo "farb" | ff2png ff2png: fread: Success (It also lacked a newline) Now it properly reports $ echo "farb" | ff2png ff2png: fread: Unexpected end of file I also fixed some other minor details, for instance that all error messages should begin with a capital letter.
2017-08-02Combine all license matters in LICENSELaslo Hunhold
We use some OpenBSD code in util.c (namely by Ted Unangst, Todd C. Miller and Otto Moerbeek), which is licensed under the ISC license. To make it clearer and make it easier to see what farbfeld really is licensed under, we include these authors in the LICENSE file and remove the explicit headers from util.c. While at it, we also remove superfluous includes and shove them to the top.
2017-04-14Remove the need of '#' for alpha masksLaslo Hunhold
To be honest, it can happen too easily that the user forgets to put the colour in quotation marks, yielding in the rest of the pipeline to be discarded as a comment.
2017-04-13Use fshut() to properly flush the output streamLaslo Hunhold
For small images, it could happen that the output stream would not be flushed before exit(), resulting in a lack of error-reporting on a full device. Using fflush(), a function I first introduced in sbase, we do the flushing before returning manually and report errors if they occurred.
2017-04-12Rename header-functions and add more util functionsLaslo Hunhold
parse_mask() -> parse a mask-color #xxxxxx ereallocarray() estrtonum() These will come in handy in the respective tools.
2017-03-30Add util.{c|h} to deduplicate codeLaslo Hunhold