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https://github.com/boostorg/regex.git
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reworked regex directory structure to match boost requirements.
[SVN r9752]
This commit is contained in:
John Maddock
284
example/jgrep/main.cpp
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284
example/jgrep/main.cpp
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/*
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*
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* Copyright (c) 1998-2000
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* Dr John Maddock
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Dr John Maddock makes no representations
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* about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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*/
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/*
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* FILE main.cpp
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* VERSION 3.04
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*/
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#include <stdio.h>
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#include <boost/regex.hpp>
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#ifdef JM_OLD_IOSTREAM
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#include <iostream.h>
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#else
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#include <iostream>
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using std::cout;
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using std::cin;
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using std::cerr;
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using std::endl;
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#endif
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#pragma hrdstop
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#include <boost/re_detail/fileiter.hpp>
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#include "jgrep.h"
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#ifndef JM_ALGO_INCLUDED
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// HP and SGI STL's use <algo.h> instead
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// this will have been pulled in by <jm_cfg.h>
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// for std::distance
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#include <algorithm>
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#endif
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allocator_type a;
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re_type e(a);
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//rei_type ei(a);
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// flags for output:
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bool use_case = true;
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bool show_lines = false;
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bool count_only = false;
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bool files_only = false;
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bool recurse = false;
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bool regularexs = true;
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bool words_only = false;
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bool verbose = false;
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void usage()
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{
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cout <<
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"jgrep version 0.95\n"
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"usage: jgrep [-options] expression file [files...]\n"
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"\n"
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"options can be one of the following:\n"
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"\n"
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"-c prints a count of the number of matching lines only\n"
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"-d recurses through subdirectories for matching files\n"
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"-i causes case to be ignored when matching\n"
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"-l lists the files which contain a match only\n"
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"-n displays the line numbers of matches\n"
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"-r- causes the expression to be interpreted as a literal string and not\n"
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" as a regular expression\n"
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"-w searches for matches that are whole words only\n"
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"-z verbose mode\n"
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"\n"
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"expression: a regular expression, or a literal string if -r- is specified\n"
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"\n"
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"files: one or more files to search, the names can contain the wildcard\n"
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" characters ? and *\n" << endl;
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}
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void parse_switch(const char* flag)
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{
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++flag;
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while(*flag)
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{
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switch(*flag)
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{
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case '-':
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switch(*(flag-1))
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{
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case 'c':
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count_only = false;
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break;
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case 'd':
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recurse = false;
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break;
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case 'i':
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use_case = false;
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break;
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case 'l':
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files_only = false;
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break;
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case 'n':
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show_lines = false;
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break;
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case 'r':
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regularexs = false;
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break;
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case 'w':
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words_only = false;
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break;
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case 'z':
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verbose = false;
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break;
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default:
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cout << "Undefined option -";
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cout.put(*flag);
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cout << endl;
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}
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// turn off prev character:
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break;
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case 'c':
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count_only = true;
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break;
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case 'd':
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recurse = true;
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break;
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case 'i':
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use_case = false;
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break;
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case 'l':
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files_only = true;
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break;
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case 'n':
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show_lines = true;
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break;
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case 'r':
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regularexs = true;
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break;
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case 'w':
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words_only = true;
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break;
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case 'z':
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verbose = true;
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break;
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case '?':
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usage();
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exit(0);
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case '+':
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break;
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default:
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cout << "Undefined option -";
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cout.put(*flag);
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cout << endl;
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}
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++flag;
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}
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}
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void HandleFile(const char* wild)
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{
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using namespace boost;
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jm_trace("Handling file " << wild);
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file_iterator end;
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file_iterator start(wild);
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if(recurse)
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{
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// go through sub directories:
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char buf[MAX_PATH];
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std::strcpy(buf, start.root());
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int rootlen = strlen(buf);
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if(*buf == 0)
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{
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std::strcpy(buf, ".");
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std::strcat(buf, directory_iterator::separator());
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std::strcat(buf, "*");
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}
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else
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{
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std::strcat(buf, directory_iterator::separator());
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std::strcat(buf, "*");
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}
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jm_trace("Enumerating directories: " << buf);
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directory_iterator dstart(buf);
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directory_iterator dend;
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// now get the file mask bit of "wild":
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const char* ptr = wild + rootlen;
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if(*ptr) ++ptr;
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jm_trace("File mask part is: " << ptr);
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while(dstart != dend)
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{
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std::sprintf(buf, "%s%s%s", dstart.path(), directory_iterator::separator(), ptr);
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HandleFile(buf);
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++dstart;
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}
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}
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std::for_each(start, end, process_grep);
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}
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int done = 0;
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void HandleArg(const char* arg)
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{
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using namespace boost;
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jm_trace("Handling argument: " << arg);
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if(*arg == '-')
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{
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parse_switch(arg);
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return;
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}
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if(done == 0)
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{
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// parse regular expression
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if(regularexs)
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{
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if(words_only == 0)
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{
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e.set_expression(arg, use_case ? regbase::normal : regbase::normal | regbase::icase);
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//ei.set_expression(arg);
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}
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else
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{
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char* buf = new char[std::strlen(arg) + 8];
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std::sprintf(buf, "\\<%s\\>", arg);
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e.set_expression(buf, use_case ? regbase::normal : regbase::normal | regbase::icase);
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//ei.set_expression(buf);
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delete[] buf;
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}
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}
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else
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{
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// we need to convert text to literal:
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int len2 = std::strlen(arg);
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int len = len2 * 5 + 6;
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char buf[8];
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char* buf2 = new char[len];
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*buf2 = 0;
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if(words_only)
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std::strcpy(buf2, "\\<");
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for(int j = 0; j < len2; ++j)
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{
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std::sprintf(buf, "\\0%o", int(arg[j]));
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std::strcat(buf2, buf);
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}
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if(words_only)
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std::strcat(buf2, "\\>");
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e.set_expression(buf2, use_case ? regbase::normal : regbase::normal | regbase::icase);
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//ei.set_expression(buf2);
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delete[] buf2;
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}
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done = 1;
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return;
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}
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// if we get to here we have one or more file names to process:
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++done;
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HandleFile(arg);
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}
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int main(int argc, char * argv[])
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{
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for(int i = 1; i < argc; ++i)
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HandleArg(argv[i]);
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if(done < 2)
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usage();
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return 0;
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}
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