awk, sed or regex to process csv file

perl is not available to me and i have an excel-generated csv file that i need to process as follows:
  1.  remove all commas within double-quotes
      (but retain comma delimiters)
  2.  remove all double-quotes
  3.  replace all spaces in each field with @!%

sample record:
1,22222222,333,"company, Inc.",,444,USPS,company name,,123 elm st,Ste 800,Miami,FL,33131,


can anyone help with this?
luke_airigAsked:
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luke_airigAuthor Commented:
Edited text of question
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ozoCommented:
If your sed is POSIX conforming,
 s/\(.*\)/"\1"/; s/\("\([^"]*\)"\)*,*/\2/g; s/ /@!%/g
should produce
1,22222222,333,company@!%Inc.,,444,USPS,company@!%name,,123@!%elm@!%st,Ste@!%800,Miami,FL,33131,
from your sample record.
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ashishkhCommented:
Try this script:
sed -e "s/\("\([^",]*\),\([^",]*\)"\)/\2\3/g; s/ /@!%/g" infile

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ozoCommented:
ashishkh, that works with a single quoted comma,
(assuming your shell can handle the -e quoting,
sed -e 's/\("\([^",]*\),\([^",]*\)"\)/\2\3/g; s/ /@!%/g'
or
sed -e 's/\("\([^",]*\),\([^",]*\)"\)/\2\3/g; s/ /@\!%/g'
may work better if not)
but not with multiple commas, as in
"a,b,c","d,e,f"

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