REGEXP is a function which operates on AS400 / ISERIES as a regular expression processor.
It is presented as a module which you link into your program at compile time (CRTPGM).
This is Version 1.0, and is available freely to use.
Download the readme file here.
Download the savfile here.
| \0 | zero | NULL |
|---|---|---|
| \t | lowercase t | Horizontal TAB |
| \n | lowercase n | New Line |
| \v | lowercase v | Vertical TAB |
| \f | lowercase f | Form Feed |
| \xnn | lowercase x | Hexadecimal character represented by nn |
| \d | lowercase d | matches any digit 0-9 |
| \D | uppercase D | matches what is not a digit |
| \w | lowercase w | matches any alphanumeric, a-zA-Z0-9_ |
| \W | Uppercase W | matches what is not alphanumeric |
| \c | lowercase c | matches any alphabetic, a-zA-Z |
| \C | Uppercase C | matches what is not alphabetic, a-zA-Z |
| \s | lowercase s | matches any whitespace character |
| \S | uppercase S | matches any non-whitespace character |
| ^ | carat | match the beginning of a string or line |
|---|---|---|
| $ | dollar sign | match the end of a string or line |
| . | stop | wildcard - matches any character |
| * | asterisk | zero or more matches |
| + | plus | one or more matches |
| ? | question mark | the match is optional, may or may not match |
| | | vertical bar | alternative (or) |
| \ | back slash | escape character, the following character has a specific meaning |
| () | round brackets | subexpression |
| {} | braces | number of occurrences to match |
| [] | square brackets | sequence or range of characters to match |
Examples ...
text='alpha'
expression='qwe'
will not find a match,
and so return a -1.
text='alpha'
expression='h'
will find a match starting in position 4,
and so return a 4.
text='alpha'
expression='\w'
will find a match starting in position 1,
and so return a 1.
text='alpha'
expression='\W'
will not find a match,
and so return a -1.
text='alp25a'
expression='\d'
will find a match starting in position 4,
and so return a 4.
text='myname@emailaddress.zx'
expression='\w+@\w+\.\w{2,3}$'
will find a match starting in position 1,
and so return a 1.
text='myname@emailaddress.zxy'
expression='\w+@\w+\.\w{2,3}$'
will find a match starting in position 1
and so return a 1.
text='myname@emailaddress.zxywv'
expression='\w+@\w+\.\w{2,3}$'
will not find a match,
and so return a -1.
text='myname@emailaddress.zx'
expression='\w+@\w+\.\w{2,3}'
will find a match starting in position 1,
and so return a 1.
text='myname@emailaddress.zxy'
expression='\w+@\w+\.\w{2,3}'
will find a match starting in position 1,
and so return a 1.
text='myname@emailaddress.zxywv'
expression='\w+@\w+\.\w{2,3}'
will find a match starting in position 1,
and so return a 1.
text='alph123'
expression='^\w+\d'
will find a match starting in position 1,
and so return a 1.
text='alph123'
expression='^\w\d'
will not find a match,
and so return a -1.
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