Indenting C code, Unix - c

Question

I searched documentation for indent, but I gave up eventually, I want to indent code like this:
int main(int argc, char **argv){
some code;
}
I know indent -kr gives you braces like this, but -kr style also includes
int
main(int argc, char **argv){
some code;
}
and this int in line before main gives me creeps.
Can anyone please tell me option for this?

Answer 1

The particular options that you are interested in are
-npsl
--dont-break-procedure-type
Put the type of a procedure on the same line as its name.
-brf
--braces-on-func-def-line
Put braces on function definition line.
As suggested, the GNU indent manual describes the various options.
Here is a quick script to illustrate the effect of those options on the basic predefined styles:
#!/bin/sh
for opt in gnu linux orig kr
do
echo "** $opt"
indent -st -$opt -npsl -brf hello.c
done
and the input file:
#include <stdio.h>
int main(int argc, char **argv) { int n; for (n = 0; n < argc; ++n) printf("arg%d=%s\n", n, argv[n]); return 0; }
and corresponding output:
** gnu
#include <stdio.h>
int main(int argc, char **argv) {
int n;
for (n = 0; n < argc; ++n)
printf("arg%d=%s\n", n, argv[n]);
return 0;
}
** linux
#include <stdio.h>
int main(int argc, char **argv) {
int n;
for (n = 0; n < argc; ++n)
printf("arg%d=%s\n", n, argv[n]);
return 0;
}
** orig
#include <stdio.h>
int main(int argc, char **argv) {
int n;
for (n = 0; n < argc; ++n)
printf("arg%d=%s\n", n, argv[n]);
return 0;
}
** kr
#include <stdio.h>
int main(int argc, char **argv) {
int n;
for (n = 0; n < argc; ++n)
printf("arg%d=%s\n", n, argv[n]);
return 0;
}
I do not see an option to suppress the space before the { character.

Answer 2

You are likely looking for the -npsl option. The -psl (--procnames-start-lines) option causes the type of a procedure being defined to be placed on the line before the name of the procedure. Thus if you specify that option, all function declarations will be changed from:
int main(int argc, char **argv){
some code;
}
to
int
main(int argc, char **argv){
some code;
}
You can check whether you are including -psl in the common type -kr and remove it, or if not included, you can specify -npsl (--dont-break-procedure-type) and the type will not be placed on a separate line.
There are trade-off with all options. I like braces on the same line as int main() {, but for function definitions I like braces on the next line. e.g.:
type function
{
...
}
So if you have mutually exclusive preferences such as that, you simply choose the one you want a majority of the code to incorporate and tweak the rest. You might give the following invocation a try:
indent -i 4 -lp -ts 8 -lp -lps -br -brs -blf -ce -cdw -pcs -bs -nbc -npsl -saf -sai -saw -nut
It is somewhat of a balanced indent scheme.