How to match )\n{ using sed?

Question

I need to write a shell script which will input a string in my .c files after a quite complicated pattern to match.

The pattern is: )\n{,

without any tabs/spaces between the \n and the {. That's to say that I want to match with a { located in the first column of my file (this in order to ONLY match with )\n{ following function declarations in C, not the ones following loops or conditions).

void some_function_declaration(char var1, char var2) {

I have read manuals, forums and still cannot figure the right way to write the pattern to match or find the corresponding regex. The corresponding output would be:

void some_function_declaration(char var1, char var2) { time_exe(__func__, cl(clock())); rest of the function...

What follows is what I've came up with so far and doesn't work.

Try 1

sed -i '' '/)$\n{/a time_exe(__func__, cl(clock()));' >> list_func2.c

Try 2

sed -i '' '/)\n{ /a time_exe(__func__, cl(clock()));' >> list_func2.c

Try 3

sed -i '' '/)/\n{/a time_exe(__func__, cl(clock()));' >> list_func2.c

I would be very glad to hear your recommandations about this matter.

Answer 1

Perl can be good for this:

$ cat file.c
void some_function_declaration(char var1, char var2)
{
    if (a)
    { b; }
}
void func2()
{
    //
}

$ perl -0777 -pe 's {\)\n\{} {$& some other stuff;\n}g' file.c
void some_function_declaration(char var1, char var2)
{ some other stuff;

    if (a)
    { b; }
}
void func2()
{ some other stuff;

    //
}

Same caveat's as Aaron's answer due to reading the whole file into memory.