|
|
Sponsored Content
Top Forums
Programming
Passing printf formatting parameters as variables
Post 302889048 by Don Cragun on Tuesday 18th of February 2014 12:43:41 PM
02-18-2014
Quote:
Don,
Thanks for the input. Sorry, I should have been more specific. case 3 "does" print white... because I've only tested this on a tty with black bg and white fg.
When it is compiled on the Windoze side, they'll be using a black and white terminal, so it's not that big of a deal, but that's no reason for sloppy code. That said, I have about a half dozen other boxes I work on, each having their own bg / fg color combos. Just so I know what machine I'm working on. I'll have to see what output they yield.
Like I said, I haven't used C for years. This project is just getting the juices flowing. I've been pulling snippets from some of my old code. Heck, I look back at some of it, some 15+ years old, and say. I DID THAT?!?!?
For now I'm taking the KIS (Keep It Simple) approach. Your example is a bit much to digest at the moment. However, reading through it does help!
Thanks for the input. Sorry, I should have been more specific. case 3 "does" print white... because I've only tested this on a tty with black bg and white fg.
When it is compiled on the Windoze side, they'll be using a black and white terminal, so it's not that big of a deal, but that's no reason for sloppy code. That said, I have about a half dozen other boxes I work on, each having their own bg / fg color combos. Just so I know what machine I'm working on. I'll have to see what output they yield. Like I said, I haven't used C for years. This project is just getting the juices flowing. I've been pulling snippets from some of my old code. Heck, I look back at some of it, some 15+ years old, and say. I DID THAT?!?!?
For now I'm taking the KIS (Keep It Simple) approach. Your example is a bit much to digest at the moment. However, reading through it does help!
I fully understand and appreciate KISS principles.
Here you have a choice between having an output function to print string arguments, an output function to print integer arguments, and an output function to print floating point arguments; or a single function that can handle all three. If you need to worry about various types of integers (int, long, long long) and floating point (float, double, long double) arguments then the processing gets more complicated. If you want to pass this routine a format string that ends with anything other than a printf() conversion specifier character, then the processing gets considerably more complicated (as in you'd have to actually interpret the entire format string argument instead of just the last character). There is also the question of what needs to be simple? Does it need to be simple for the person writing the output*() function (or functions), or does it need to be simple for the person using those functions? (Of course, in this case both of those might be the same person!)
Programming is full of trade-offs. I just wanted to give you some options to consider.
|
|
10 More Discussions You Might Find Interesting
1. Answers to Frequently Asked Questions
A good place to start is simple variable passing....
Passing variables from one script to another
The next level is passing a variable into a more complex command such as using a variable in a sed command. There are some simple quoting techniques that are very general. These are mentioned... (0 Replies)
Discussion started by: Perderabo
0 Replies
2. Shell Programming and Scripting
hi,
i am passing around 14 parameters for a script
a=$1
b=$2
c=$3
d=$4
e=$5
f=$6
g=$7
h=$8
i=\"${9}\"
shift
j=\"${1}\"
still for j it is displaying the 1st parameter value..how to make it take the 10th parameter (2 Replies)
Discussion started by: dnat
2 Replies
3. Shell Programming and Scripting
Hi all,
My simple AWK code does C = A - B
If C can be a negative number, how awk printf formating handles it using string format specifier.
Thanks in advance
Kanu
:confused: (9 Replies)
Discussion started by: kanu_pathak
9 Replies
4. Shell Programming and Scripting
seems simple but i've not been successfull in adding the value of a Variable to a every line of a file using AWK & printf
i've come up with the following, but it's not working.:mad:
--- mydatafile.dat
e.g. of data in file:
cau_actvty_fa_lrf.ksh
fan_soco_fa.ksh
ny_sum_lst.ksh... (4 Replies)
Discussion started by: danmauer
4 Replies
5. Shell Programming and Scripting
Hi I'm having a problem with converting a file:
ID X
1 7
1 8
1 3
2 5
2 7
2 2
To something like this:
ID X1 X2 X3
1 7 8 3
2 5 7 2
I've tried the following loop:
for i in `cat tst.csv| awk -F "," '{print $1}'| uniq`;do grep -h $i... (4 Replies)
Discussion started by: flotsam
4 Replies
6. UNIX for Dummies Questions & Answers
Is there a way to make these 2 numbers - $482477.37 and $1875000.00
look like $482,477.37 and $1,875,000.00 with printf? (4 Replies)
Discussion started by: nickg
4 Replies
7. Shell Programming and Scripting
Hi Friends,
I am trying to insert lines of the below format in a file:
# x3a4914 Joe 2010/04/07
# seh Lane 2010/04/07
# IN01379 Larry 2010/04/07
I am formatting the strings as follows using awk printf:
awk 'printf "# %s %9s %18s\n", $2,$3,$4}'
... (2 Replies)
Discussion started by: sugan
2 Replies
8. Shell Programming and Scripting
Getting the below error while executing this. Able to run the below commands Individually.
#!/bin/bash
a=$(printf "%d\n" 0x01E);
b=$(printf "%d\n" 0x01A);
echo $a
echo $b
c=`expr $a - $b`
echo $c
syntax error at line 2: `a=$' unexpected (2 Replies)
Discussion started by: sai_1712
2 Replies
9. Shell Programming and Scripting
Hi All,
I am attempting to create a fixed length tilde delimited file using printf.
The variables are initialized to fixed length blank spaces
a=' '
b=' '
c=' '
d=' '
Sometimes the variable might contain values and sometimes they are... (5 Replies)
Discussion started by: angie1234
5 Replies
10. Shell Programming and Scripting
Trying to do so
echo "111:222:333" |awk -F: '{system("export TESTO=" $2)}'But it doesn't work (2 Replies)
Discussion started by: urello
2 Replies
LEARN ABOUT SUSE
git-sh-setup
GIT-SH-SETUP(1) Git Manual GIT-SH-SETUP(1) NAME
git-sh-setup - Common git shell script setup code SYNOPSIS
. "$(git --exec-path)/git-sh-setup" DESCRIPTION
This is not a command the end user would want to run. Ever. This documentation is meant for people who are studying the Porcelain-ish scripts and/or are writing new ones. The git sh-setup scriptlet is designed to be sourced (using .) by other shell scripts to set up some variables pointing at the normal git directories and a few helper shell functions. Before sourcing it, your script should set up a few variables; USAGE (and LONG_USAGE, if any) is used to define message given by usage() shell function. SUBDIRECTORY_OK can be set if the script can run from a subdirectory of the working tree (some commands do not). The scriptlet sets GIT_DIR and GIT_OBJECT_DIRECTORY shell variables, but does not export them to the environment. FUNCTIONS
die exit after emitting the supplied error message to the standard error stream. usage die with the usage message. set_reflog_action set the message that will be recorded to describe the end-user action in the reflog, when the script updates a ref. git_editor runs an editor of user's choice (GIT_EDITOR, core.editor, VISUAL or EDITOR) on a given file, but error out if no editor is specified and the terminal is dumb. is_bare_repository outputs true or false to the standard output stream to indicate if the repository is a bare repository (i.e. without an associated working tree). cd_to_toplevel runs chdir to the toplevel of the working tree. require_work_tree checks if the repository is a bare repository, and dies if so. Used by scripts that require working tree (e.g. checkout). get_author_ident_from_commit outputs code for use with eval to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL and GIT_AUTHOR_DATE variables for a given commit. AUTHOR
Written by Linus Torvalds <torvalds@osdl.org[1]> DOCUMENTATION
Documentation by Junio C Hamano and the git-list <git@vger.kernel.org[2]>. GIT
Part of the git(1) suite NOTES
1. torvalds@osdl.org mailto:torvalds@osdl.org 2. git@vger.kernel.org mailto:git@vger.kernel.org Git 1.7.1 07/05/2010 GIT-SH-SETUP(1)