Functions/Misc/regexp-replace


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

# 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=
local MATCH MBEGIN MEND
local -a match mbegin mend

while [[ -n $4 ]]; do
  if [[ $4 =~ $2 ]]; then
    5+=${4[1,MBEGIN-1]}${(e)3}
    4=${4[MEND+1,-1]}
  else
    break
  fi
done
5+=$4

eval ${1}=${(q)5}