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/*********************************************************************
Example source code for using the argtable2 library to implement
a multi-syntax command line argument program
usage 1: multisyntax [-nvR] insert <file> [<file>]... [-o <output>]
usage 2: multisyntax [-nv] remove <file>
usage 3: multisyntax [-v] search <pattern> [-o <output>]
usage 4: multisyntax [--help] [--version]
Copyright (C) 1998-2001,2003-2011 Stewart Heitmann
sheitmann@users.sourceforge.net
This is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This software is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.
**********************************************************************/
#include "argtable2.h"
#include <regex.h> /* REG_ICASE */
/* mymain1 implements the actions for syntax 1 */
int mymain1(int n, int v, int R, const char *outfile,
const char **infiles, int ninfiles)
{
int i;
printf("syntax 1 matched OK:\n");
printf("n=%d\n", n);
printf("v=%d\n", v);
printf("R=%d\n", R);
printf("outfile=\"%s\"\n", outfile);
for (i=0; i<ninfiles; i++)
printf("infile[%d]=\"%s\"\n",i,infiles[i]);
return 0;
}
/* mymain2 implements the actions for syntax 2 */
int mymain2(int n, int v, const char *infile)
{
printf("syntax 2 matched OK:\n");
printf("n=%d\n", n);
printf("v=%d\n", v);
printf("infile=\"%s\"\n", infile);
return 0;
}
/* mymain3 implements the actions for syntax 3 */
int mymain3(int v, const char *pattern, const char *outfile)
{
printf("syntax 3 matched OK:\n");
printf("v=%d\n", v);
printf("pattern=\"%s\"\n", pattern);
printf("outfile=\"%s\"\n", outfile);
return 0;
}
/* mymain4 implements the actions for syntax 4 */
int mymain4(int help, int version, const char *progname,
void *argtable1, void *argtable2, void *argtable3, void *argtable4)
{
/* --help option */
if (help)
{
printf("Usage: %s", progname);
arg_print_syntax(stdout,argtable1,"\n");
printf(" %s", progname);
arg_print_syntax(stdout,argtable2,"\n");
printf(" %s", progname);
arg_print_syntax(stdout,argtable3,"\n");
printf(" %s", progname);
arg_print_syntax(stdout,argtable4,"\n");
printf("This program demonstrates the use of the argtable2 library\n");
printf("for parsing multiple command line syntaxes.\n");
arg_print_glossary(stdout,argtable1," %-20s %s\n");
arg_print_glossary(stdout,argtable2," %-20s %s\n");
arg_print_glossary(stdout,argtable3," %-20s %s\n");
arg_print_glossary(stdout,argtable4," %-20s %s\n");
return 0;
}
/* --version option */
if (version)
{
printf("'%s' example program for the \"argtable\" command line argument parser.\n",progname);
return 0;
}
/* no command line options at all */
printf("Try '%s --help' for more information.\n", progname);
return 0;
}
int main(int argc, char **argv)
{
/* SYNTAX 1: insert [-nvR] <file> [file]... -o <file> */
struct arg_rex *cmd1 = arg_rex1(NULL, NULL, "insert", NULL, REG_ICASE, NULL);
struct arg_lit *noact1 = arg_lit0("n", NULL, "take no action");
struct arg_lit *verbose1 = arg_lit0("v", "verbose", "verbose messages");
struct arg_lit *recurse1 = arg_lit0("R", NULL, "recurse through subdirectories");
struct arg_file *infiles1 = arg_filen(NULL, NULL, NULL, 1,argc+2, "input file(s)");
struct arg_file *outfile1 = arg_file0("o", NULL, "<output>", "output file (default is \"-\")");
struct arg_end *end1 = arg_end(20);
void* argtable1[] = {cmd1,noact1,verbose1,recurse1,infiles1,outfile1,end1};
int nerrors1;
/* SYNTAX 2: remove [-nv] <file> */
struct arg_rex *cmd2 = arg_rex1(NULL, NULL, "remove", NULL, REG_ICASE, NULL);
struct arg_lit *noact2 = arg_lit0("n", NULL, NULL);
struct arg_lit *verbose2 = arg_lit0("v", "verbose", NULL);
struct arg_file *infiles2 = arg_file1(NULL, NULL, NULL, NULL);
struct arg_end *end2 = arg_end(20);
void* argtable2[] = {cmd2,noact2,verbose2,infiles2,end2};
int nerrors2;
/* SYNTAX 3: search [-v] <pattern> [-o <file>] [--help] [--version] */
struct arg_rex *cmd3 = arg_rex1(NULL, NULL, "search", NULL, REG_ICASE, NULL);
struct arg_lit *verbose3 = arg_lit0("v", "verbose", NULL);
struct arg_str *pattern3 = arg_str1(NULL, NULL, "<pattern>", "search string");
struct arg_file *outfile3 = arg_file0("o", NULL, "<output>", NULL);
struct arg_end *end3 = arg_end(20);
void* argtable3[] = {cmd3,verbose3,pattern3,outfile3,end3};
int nerrors3;
/* SYNTAX 4: [-help] [-version] */
struct arg_lit *help4 = arg_lit0(NULL,"help", "print this help and exit");
struct arg_lit *version4 = arg_lit0(NULL,"version", "print version information and exit");
struct arg_end *end4 = arg_end(20);
void* argtable4[] = {help4,version4,end4};
int nerrors4;
const char* progname = "multisyntax";
int exitcode=0;
/* verify all argtable[] entries were allocated sucessfully */
if (arg_nullcheck(argtable1)!=0 ||
arg_nullcheck(argtable2)!=0 ||
arg_nullcheck(argtable3)!=0 ||
arg_nullcheck(argtable4)!=0 )
{
/* NULL entries were detected, some allocations must have failed */
printf("%s: insufficient memory\n",progname);
exitcode=1;
goto exit;
}
/* set any command line default values prior to parsing */
outfile1->filename[0]="-";
outfile3->filename[0]="-";
/* Above we defined a separate argtable for each possible command line syntax */
/* and here we parse each one in turn to see if any of them are successful */
nerrors1 = arg_parse(argc,argv,argtable1);
nerrors2 = arg_parse(argc,argv,argtable2);
nerrors3 = arg_parse(argc,argv,argtable3);
nerrors4 = arg_parse(argc,argv,argtable4);
/* Execute the appropriate main<n> routine for the matching command line syntax */
/* In this example program our alternate command line syntaxes are mutually */
/* exclusive, so we know in advance that only one of them can be successful. */
if (nerrors1==0)
exitcode = mymain1(noact1->count, verbose1->count, recurse1->count,
outfile1->filename[0], infiles1->filename, infiles1->count);
else if (nerrors2==0)
exitcode = mymain2(noact2->count, verbose2->count, infiles2->filename[0]);
else if (nerrors3==0)
exitcode = mymain3(verbose3->count, pattern3->sval[0], outfile3->filename[0]);
else if (nerrors4==0)
exitcode = mymain4(help4->count, version4->count, progname,
argtable1, argtable2, argtable3, argtable4);
else
{
/* We get here if the command line matched none of the possible syntaxes */
if (cmd1->count > 0)
{
/* here the cmd1 argument was correct, so presume syntax 1 was intended target */
arg_print_errors(stdout,end1,progname);
printf("usage: %s ", progname);
arg_print_syntax(stdout,argtable1,"\n");
}
else if (cmd2->count > 0)
{
/* here the cmd2 argument was correct, so presume syntax 2 was intended target */
arg_print_errors(stdout,end2,progname);
printf("usage: %s ", progname);
arg_print_syntax(stdout,argtable2,"\n");
}
else if (cmd3->count > 0)
{
/* here the cmd3 argument was correct, so presume syntax 3 was intended target */
arg_print_errors(stdout,end3,progname);
printf("usage: %s ", progname);
arg_print_syntax(stdout,argtable3,"\n");
}
else
{
/* no correct cmd literals were given, so we cant presume which syntax was intended */
printf("%s: missing <insert|remove|search> command.\n",progname);
printf("usage 1: %s ", progname); arg_print_syntax(stdout,argtable1,"\n");
printf("usage 2: %s ", progname); arg_print_syntax(stdout,argtable2,"\n");
printf("usage 3: %s ", progname); arg_print_syntax(stdout,argtable3,"\n");
printf("usage 4: %s", progname); arg_print_syntax(stdout,argtable4,"\n");
}
}
exit:
/* deallocate each non-null entry in each argtable */
arg_freetable(argtable1,sizeof(argtable1)/sizeof(argtable1[0]));
arg_freetable(argtable2,sizeof(argtable2)/sizeof(argtable2[0]));
arg_freetable(argtable3,sizeof(argtable3)/sizeof(argtable3[0]));
arg_freetable(argtable4,sizeof(argtable4)/sizeof(argtable4[0]));
return exitcode;
}
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