Regex: Match any character (including whitespace) except a comma - regex

Question

I would like to match any character and any whitespace except comma with regex. Only matching any character except comma gives me:
[^,]*
but I also want to match any whitespace characters, tabs, space, newline, etc. anywhere in the string.
EDIT:
This is using sed in vim via :%s/foo/bar/gc.
I want to find starting from func up until the comma, in the following example:
func("bla bla bla"
"asdfasdfasdfasdfasdfasdf"
"asdfasdfasdf", "more strings")
I

Answer 1

To work with multiline in SED using RegEx, you should look at here.
EDIT:
In SED command, working with NewLine is a bit different. SED command support three patterns to manage multiline operations N, P and D. To see how it works see this(Working with Multiple Lines) explaination. Here these three operations discussed.
My guess is that N operator is the area of consideration that is missing from here. Addition of N operator will allows to sense \n in string.
An example from here:
Occasionally one wishes to use a new line character in a sed script.
Well, this has some subtle issues here. If one wants to search for a
new line, one has to use "\n." Here is an example where you search for
a phrase, and delete the new line character after that phrase -
joining two lines together.
(echo a;echo x;echo y) | sed '/x$/ { N s:x\n:x: }'
which generates
a xy
However, if you are inserting a new line, don't use "\n" - instead
insert a literal new line character:
(echo a;echo x;echo y) | sed 's:x:X\ :'
generates
a X
y

Answer 2

So basically you're trying to match a pattern over multiple lines.
Here's one way to do it in sed (pretty sure these are not useable within vim though, and I don't know how to replicate this within vim)
sed '
/func/{
:loop
/,/! {N; b loop}
s/[^,]*/func("ok"/
}
' inputfile
Let's say inputfile contains these lines
func("bla bla bla"
"asdfasdfasdfasdfasdfasdf"
"asdfasdfasdf", "more strings")
The output is
func("ok", "more strings")
Details:
If a line contains func, enter the braces.
:loop is a label named loop
If the line does not contain , (that's what /,/! means)
append the next line to pattern space (N)
branch to / go to loop label (b loop)
So it will keep on appending lines and looping until , is found, upon which the s command is run which matches all characters before the first comma against the (multi-line) pattern space, and performs a replacement.