asked on

HOSTS file parsing

From file sample posted below I would like to get TStringList with items:
127.0.0.1 losalhost
127.0.0.1 sampleone.com
127.0.0.1 sampletwo.com
127.0.0.1 samplethree.com

So, a parsing routine needed that ignores all commented (#) lines and recognizes multiple hosts in one line.

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host
# localhost name resolution is handled within DNS itself.
#	127.0.0.1       localhost
#	::1             localhost
127.0.0.1       localhost
127.0.0.1 sampleone.com sampletwo.com samplethree.com # comment

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ASKER CERTIFIED SOLUTION

Emmanuel PASQUIER

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3axap

ASKER

Thank you Pasquier.
One related question if I may. What is the best practice to open text file for reading, as in my original question?
Read it to TStringList to Memo or to TFileStream?
Thanks

Emmanuel PASQUIER

Memo.Lines.LoadFromFile( aFileName );

if you don't need to display in a memo, use a TStringList :
aStringList.LoadFromFile( aFileName );