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| | # Replace all occurrences of a regular expression in a variable. The
# variable is modified directly. Respects the setting of the
# option RE_MATCH_PCRE.
#
# First argument: *name* (not contents) of variable.
# Second argument: regular expression
# Third argument: replacement string. This can contain all forms of
# $ and backtick substitutions; in particular, $MATCH will be replaced
# by the portion of the string matched by the regular expression.
integer pcre
[[ -o re_match_pcre ]] && pcre=1
emulate -L zsh
(( pcre )) && setopt re_match_pcre
# $4 is the string to be matched
4=${(P)1}
# $5 is the final string
5=
# 6 indicates if we made a change
6=
local MATCH MBEGIN MEND
local -a match mbegin mend
while [[ -n $4 ]]; do
if [[ $4 =~ $2 ]]; then
# append initial part and subsituted match
5+=${4[1,MBEGIN-1]}${(e)3}
# truncate remaining string
4=${4[MEND+1,-1]}
# indicate we did something
6=1
else
break
fi
done
5+=$4
: ${(P)1::=$5}
# status 0 if we did something, else 1.
[[ -n $6 ]]
|