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# gosub(regexp, replacement [, target])
# Aka global original sub
# Behaves like gsub, however doesn't try regexp on previoud replacements
# and returns the result string, rather than doing it inplace.
function gosub(regexp, replacement, target) {
if (!length(target)) {
target = $0;
}
result = "";
matched = "";
while (match(target, regexp)) {
result = result substr(target, 1, RSTART - 1);
matched = substr(target, RSTART, RLENGTH);
target = substr(target, RSTART + RLENGTH);
sub(regexp, replacement, matched);
result = result matched;
}
return result target;
}
# gesub(regexp, exregexp, replacement [, target])
# Aka global excluding sub
# Behaves like gsub, however substitutes only where exregexp doesn't match
# and returns the result string, rather than doing it inplace.
function gesub(regexp, exregexp, replacement, target) {
if (!length(target)) {
target = $0;
}
result = "";
while (match(target, exregexp)) {
beg = substr(target, 1, RSTART - 1);
exclude = substr(target, RSTART, RLENGTH);
target = substr(target, RSTART + RLENGTH);
gsub(regexp, replacement, beg);
result = result beg exclude;
}
gsub(regexp, replacement, target);
return result target;
}
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