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/* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 1997-2004 Net Integration Technologies, Inc.
*
* A clone of grep(1) that is written entirely in WvStreams
*
*/
#include "wvstring.h"
#include "wvstringlist.h"
#include "wvargs.h"
#include "wvregex.h"
#include "wvfile.h"
#define VERSION "0.1.0"
static void output_filename(WvStringParm filename,
char suffix, bool display_nulls)
{
wvout->print(!!filename? filename: WvFastString("(standard input)"));
if (display_nulls)
wvout->write("\0", 1);
else
wvout->write(&suffix, 1);
}
static int match(const WvRegex ®ex, WvStringParm filename, WvStream *file,
bool invert_match, bool display_filename, bool display_line_number,
bool display_nulls, bool display_nothing, bool end_on_first_match)
{
int count = 0;
int lineno = 0;
while (file->isok())
{
const char *line = file->blocking_getline(-1);
if (line == NULL) break;
++lineno;
bool result = regex.match(line);
if (invert_match) result = !result;
if (result)
{
++count;
if (end_on_first_match) return count;
}
if (!result || display_nothing) continue;
if (display_filename)
output_filename(filename, ':', display_nulls);
if (display_line_number)
wvout->print("%s:", lineno);
wvout->print("%s\n", line);
}
return count;
}
int main(int argc, char **argv)
{
WvArgs args;
args.set_version("wvgrep (WvStreams grep) " VERSION "\n");
args.set_email("<" WVPACKAGE_BUGREPORT ">");
bool opt_count = false;
args.add_set_bool_option('c', "count", WvString::null, opt_count);
bool opt_extended_regexp = false;
args.add_set_bool_option('E', "extended-regexp", WvString::null, opt_extended_regexp);
WvString opt_regexp;
args.add_option('e', "regexp", WvString::null, WvString::null, opt_regexp);
bool opt_basic_regexp = false;
args.add_set_bool_option('G', "basic-regexp", WvString::null, opt_basic_regexp);
bool opt_with_filename = false;
args.add_set_bool_option('H', "with-filename", WvString::null, opt_with_filename);
bool opt_no_filename = false;
args.add_set_bool_option('h', "no-filename", WvString::null, opt_no_filename);
bool opt_ignore_case = false;
args.add_set_bool_option('i', "ignore-case", WvString::null, opt_ignore_case);
args.add_set_bool_option('y', WvString::null, "Synonym for -i", opt_ignore_case);
bool opt_files_without_match = false;
args.add_set_bool_option('L', "files-without-match", WvString::null, opt_files_without_match);
bool opt_files_with_matches = false;
args.add_set_bool_option('l', "files-with-matches", WvString::null, opt_files_with_matches);
bool opt_line_number = false;
args.add_set_bool_option('n', "line-number", WvString::null, opt_line_number);
bool opt_quiet = false;
args.add_set_bool_option('q', "quiet", WvString::null, opt_quiet);
args.add_set_bool_option(0, "silent", "Synonym for --quiet", opt_quiet);
bool opt_no_messages = false;
args.add_set_bool_option('s', "no-message", WvString::null, opt_no_messages);
bool opt_invert_match = false;
args.add_set_bool_option('v', "invert-match", WvString::null, opt_invert_match);
bool opt_line_regexp = false;
args.add_set_bool_option('x', "line-regexp", WvString::null, opt_line_regexp);
bool opt_null = false;
args.add_set_bool_option('Z', "null", WvString::null, opt_null);
args.add_required_arg("PATTERN");
args.add_optional_arg("FILE", true);
args.set_help_header("Search for PATTERN in each FILE or standard input.");
args.set_help_footer("With no FILE, this program reads standard input.");
WvStringList remaining_args;
args.process(argc, argv, &remaining_args);
if (!opt_regexp && !remaining_args.isempty())
opt_regexp = remaining_args.popstr();
int cflags = WvFastString(argv[0]) == "egrep"?
WvRegex::EXTENDED: WvRegex::BASIC;
if (opt_extended_regexp) cflags = WvRegex::EXTENDED;
if (opt_basic_regexp) cflags = WvRegex::BASIC;
if (opt_ignore_case) cflags |= WvRegex::ICASE;
WvString regex_str;
if (opt_line_regexp)
regex_str = WvString("^%s$", opt_regexp);
else regex_str = opt_regexp;
WvRegex regex(regex_str, cflags);
if (!regex.isok())
{
WvString errstr = regex.errstr();
wverr->print("%s: Invalid regular expression", argv[0]);
if (!!errstr) wverr->print(errstr);
wverr->write("\n", 1);
return 2;
}
bool display_filename = remaining_args.count() >= 2;
if (opt_with_filename) display_filename = true;
if (opt_no_filename) display_filename = false;
if (remaining_args.isempty())
remaining_args.append(WvString::null);
bool found_match = false;
WvStringList::Iter filename(remaining_args);
for (filename.rewind(); filename.next(); )
{
WvStream *file;
if (!!*filename)
file = new WvFile(*filename, O_RDONLY);
else
file = wvcon;
if (!file->isok())
{
if (!opt_no_messages)
wverr->print("%s: %s: %s\n", argv[0],
*filename, file->errstr());
if (!!*filename) WVRELEASE(file);
continue;
}
int count = match(regex, *filename, file,
opt_invert_match, display_filename, opt_line_number, opt_null,
opt_count || opt_files_without_match || opt_files_with_matches,
opt_quiet);
if (!!*filename) WVRELEASE(file);
if (opt_files_with_matches || opt_files_without_match)
{
bool display = opt_files_with_matches? count>0: count==0;
if (display)
output_filename(*filename, '\n', opt_null);
}
else if(opt_count)
{
if (display_filename)
output_filename(*filename, ':', opt_null);
wvout->print("%s\n", count);
}
found_match = found_match || count > 0;
if (opt_quiet && found_match) break;
}
return found_match? 0: 1;
}
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