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option.c
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//
// option.c: Get all command line options specified and parse accordingly
//
// Date: $Date: 2013/12/02 19:16:57 $
//
// Author: $Author: chuck $
//
// RCSfile: $RCSfile: option.c,v $
//
// Id: $Id: option.c,v 1.17 2013/12/02 19:16:57 chuck Exp $
//
// Invocation: getoptions(ac,av) // uses 'argc' and 'argv' as supplied to main() directly
//
// ChangeLog:
//
// $Log: option.c,v $
// Revision 1.17 2013/12/02 19:16:57 chuck
// added rcs_file_version identification string
//
// Revision 1.16 2013/11/29 21:39:10 chuck
// added -threads as primary new option. Threads are now supported and enabled.
// added aliases p0 = pmin, p1 = pmax, k0 = kmin, k1 = kmax
// added -nodelete to suppress asking about logging deletes if -yes or -no without logging Q.
//
// Revision 1.15 2013/11/21 21:36:53 chuck
// Forgot to remove debug statements. OOPS
//
// Revision 1.14 2013/11/21 20:47:18 chuck
// Corrected gcc ambiguity while exponentiating xEnnn notation.
//
// Revision 1.13 2013/11/21 19:46:18 chuck
// Added support for 'E' notation in Pmin & Pmax. Now may be 2E9 == 2 * 10^9
//
// Revision 1.12 2013/11/21 04:27:00 chuck
// completed implementation of -yes and -no options. YES and NO implied reply to questions
//
// Revision 1.11 2013/11/16 17:08:22 chuck
// cleaned up source
//
// Revision 1.10 2013/11/15 21:18:36 chuck
// Removed '--' option format, added minimal unique support (cheat names)
//
// Revision 1.9 2013/11/11 01:12:25 chuck
// Eliminated a race condition that will occur after figuring out we need the data
// from the INI file (the names preloaded into destination variables) and then being
// overwritten by the command line processing. While it is almost certain to be the
// desired outcome due to sequencing, this guarantees any user combination will work
//
// Revision 1.8 2013/11/10 19:30:31 chuck
// Added Yes/No default action support.
//
// Revision 1.7 2013/11/10 19:03:13 chuck
// variable name conflict corrected
//
// Revision 1.6 2013/11/10 18:50:51 chuck
// Added 'implied' file name specification support (relaxed user input requirements)
// to permit input, output and log filenames to be 'implied' if not previously explicitly
// defined on the command line.
//
// However, once used by the main logic and flags are set, there is no turning back.
//
// Revision 1.5 2013/11/10 00:49:30 chuck
// rewrite entire option module for proper option w/ detached value handling
//
// Revision 1.4 2013/11/08 04:01:33 chuck
// added '-N[ew]', support for abbreviated options, and upper/lower case control
//
// Revision 1.3 2013/11/07 16:35:34 chuck
// added printoptions()
//
// Notes:
// revision history
// ----------------
// 16-Oct-2013 - Installed Keyword structure to simplify coding
// 12-Oct-2013 - update (upper/lower case support)
// 06-Oct-2013 - Keyword validation & error reporting (forces exit)
// 04-Oct-2013 - Initial version
//
//
static char *rcs_file_verson = "$Id: option.c,v 1.17 2013/12/02 19:16:57 chuck Exp $";
//
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <math.h>
#include "sieve.h"
#include "string.h"
#include "option.h"
// Command line options and decoding/processing table
struct_opt opttab[] = {
// option, upper, bool, type, flag, dest,
{ "H", 1, 1, null, &optHelp, &Help },
{ "HE", 1, 1, null, &optHelp, &Help },
{ "HEL", 1, 1, null, &optHelp, &Help },
{ "HELP", 1, 1, null, &optHelp, &Help },
{ "A", 1, 0, intger, &optAutosave, &Autosave },
{ "AU", 1, 0, intger, &optAutosave, &Autosave },
{ "AUT", 1, 0, intger, &optAutosave, &Autosave },
{ "AUTO", 1, 0, intger, &optAutosave, &Autosave },
{ "AUTOS", 1, 0, intger, &optAutosave, &Autosave },
{ "AUTOSA", 1, 0, intger, &optAutosave, &Autosave },
{ "AUTOSAV", 1, 0, intger, &optAutosave, &Autosave },
{ "AUTOSAVE", 1, 0, intger, &optAutosave, &Autosave },
{ "B", 1, 0, intger, &optB, &B },
{ "BA", 1, 0, intger, &optB, &B },
{ "BAS", 1, 0, intger, &optB, &B },
{ "BASE", 1, 0, intger, &optB, &B },
{ "C", 1, 0, intger, &optC, &C },
{ "D", 1, 1, null, &optDelete, &LogDelete },
{ "DE", 1, 1, null, &optDelete, &LogDelete },
{ "DEL", 1, 1, null, &optDelete, &LogDelete },
{ "DELE", 1, 1, null, &optDelete, &LogDelete },
{ "DELET", 1, 1, null, &optDelete, &LogDelete },
{ "DELETE", 1, 1, null, &optDelete, &LogDelete },
{ "I", 1, 0, string, &optInput, &optInputName },
{ "IN", 1, 0, string, &optInput, &optInputName },
{ "INP", 1, 0, string, &optInput, &optInputName },
{ "INPU", 1, 0, string, &optInput, &optInputName },
{ "INPUT", 1, 0, string, &optInput, &optInputName },
{ "K0", 1, 0, intger, &optKmin, &Kmin },
{ "KMI", 1, 0, intger, &optKmin, &Kmin },
{ "KMIN", 1, 0, intger, &optKmin, &Kmin },
{ "K1", 1, 0, intger, &optKmax, &Kmax },
{ "KMA", 1, 0, intger, &optKmax, &Kmax },
{ "KMAX", 1, 0, intger, &optKmax, &Kmax },
{ "N", 1, 0, intger, &optN, &N },
{ "NE", 1, 1, null, &optNew, &optNew },
{ "NEW", 1, 1, null, &optNew, &optNew },
{ "NO", 1, 1, null, &optNo, &optNo },
{ "NOD", 1, 1, null, &optNoDelete, &optNoDelete },
{ "NODE", 1, 1, null, &optNoDelete, &optNoDelete },
{ "NODEL", 1, 1, null, &optNoDelete, &optNoDelete },
{ "NODELE", 1, 1, null, &optNoDelete, &optNoDelete },
{ "NODELET", 1, 1, null, &optNoDelete, &optNoDelete },
{ "NODELETE", 1, 1, null, &optNoDelete, &optNoDelete },
{ "O", 1, 0, string, &optOutput, &optOutputName },
{ "OU", 1, 0, string, &optOutput, &optOutputName },
{ "OUT", 1, 0, string, &optOutput, &optOutputName },
{ "OUTP", 1, 0, string, &optOutput, &optOutputName },
{ "OUTPU", 1, 0, string, &optOutput, &optOutputName },
{ "OUTPUT", 1, 0, string, &optOutput, &optOutputName },
{ "L", 1, 0, string, &optLogfile, &optLogName },
{ "LO", 1, 0, string, &optLogfile, &optLogName },
{ "LOG", 1, 0, string, &optLogfile, &optLogName },
{ "LOGF", 1, 0, string, &optLogfile, &optLogName },
{ "LOGFI", 1, 0, string, &optLogfile, &optLogName },
{ "LOGFIL", 1, 0, string, &optLogfile, &optLogName },
{ "LOGFILE", 1, 0, string, &optLogfile, &optLogName },
{ "p", 0, 0, powr, &optPmin, &optMinP }, //* LOWERCASE 'p'
{ "P0", 1, 0, powr, &optPmin, &optMinP },
{ "PMI", 1, 0, powr, &optPmin, &optMinP },
{ "PMIN", 1, 0, powr, &optPmin, &optMinP },
{ "P", 0, 0, powr, &optPmax, &optMaxP },
{ "P1", 1, 0, powr, &optPmax, &optMaxP },
{ "PMA", 1, 0, powr, &optPmax, &optMaxP },
{ "PMAX", 1, 0, powr, &optPmax, &optMaxP },
{ "Q", 1, 1, null, &optQuiet, &optQuiet },
{ "QU", 1, 1, null, &optQuiet, &optQuiet },
{ "QUI", 1, 1, null, &optQuiet, &optQuiet },
{ "QUIE", 1, 1, null, &optQuiet, &optQuiet },
{ "QUIET", 1, 1, null, &optQuiet, &optQuiet },
{ "R", 1, 1, null, &optResume, &optResume },
{ "RE", 1, 1, null, &optResume, &optResume },
{ "RES", 1, 1, null, &optResume, &optResume },
{ "RESU", 1, 1, null, &optResume, &optResume },
{ "RESUM", 1, 1, null, &optResume, &optResume },
{ "RESUME", 1, 1, null, &optResume, &optResume },
{ "S", 1, 0, intger, &optAutosave, &Autosave },
{ "SA", 1, 0, intger, &optAutosave, &Autosave },
{ "SAV", 1, 0, intger, &optAutosave, &Autosave },
{ "SAVE", 1, 0, intger, &optAutosave, &Autosave },
{ "T", 1, 0, intger, &optThreads, &optNumThreads },
{ "TH", 1, 0, intger, &optThreads, &optNumThreads },
{ "THR", 1, 0, intger, &optThreads, &optNumThreads },
{ "THRE", 1, 0, intger, &optThreads, &optNumThreads },
{ "THREA", 1, 0, intger, &optThreads, &optNumThreads },
{ "THREAD", 1, 0, intger, &optThreads, &optNumThreads },
{ "THREADS", 1, 0, intger, &optThreads, &optNumThreads },
{ "V", 1, 1, null, &optVerbose, &optVerbose },
{ "VE", 1, 1, null, &optVerbose, &optVerbose },
{ "VER", 1, 1, null, &optVerbose, &optVerbose },
{ "VERB", 1, 1, null, &optVerbose, &optVerbose },
{ "VERBO", 1, 1, null, &optVerbose, &optVerbose },
{ "VERBOS", 1, 1, null, &optVerbose, &optVerbose },
{ "VERBOSE", 1, 1, null, &optVerbose, &optVerbose },
{ "YE", 1, 1, null, &optYes, &optYes},
{ "YES", 1, 1, null, &optYes, &optYes},
{ 0,0,0,0,0 }
};
// support function for power() since C has no power operator and I don't want the library
uint64_t power(int a, int b)
{
register uint64_t result = 1;
while (b--) result *= a;
return result;
}
#define ISSTRING(a,b) ( (strlen(a)==strlen(b)) && (!strcmp(a,b)) )
// here we go
int printoptions()
{
int i;
char keyword[64];
printf("command line options:\n\n");
printf(" ");
i=0;
while ( *opttab[i].keyword ) {
strcpy(keyword,opttab[i].keyword);
if (opttab[i].upper) locase(keyword);
(keyword[1]) ? printf("--%s",keyword) : printf("-%s",keyword) ;
i++;
}
}
int getoptions(ac, av)
int ac;
char *av[];
{
int arg;
char *a, *keyword, *value, argstring[512];
char upperkey[512];
long ord, exp; // the ordinal x for x*10^exp
char newvalue[128]; // temp string space to construct new value to convert back normally
int argcount = 0; // how many did we find/recognize
int i, id,found;
int errors = 0; // how many errors did we encounter during processing.
char *TRUE = "1"; // for conversion from Y to true
uint64_t newlong; // make gcc happy (silly promotion rules)
// clear all opt flags
optResume = optAutosave = optDelete = optQuiet = optVerbose = 0;
optInput = optOutput = optLogfile = optN = optB = optKmin = optKmax = optC = 0;
optPmin = optPmax = optNew = optThreads = optYes = optNo = 0;
optNoDelete = optHelp = 0;
// remember, argv[0] is the command name :P //
for (arg=1; arg < ac; arg++) {
// make sure the user didn't try to screw up the command line on purpose
strcpy(argstring,av[arg]);
a = rtrim(argstring);
a = ltrim(a);
// is this a real option?
if ( *a == '-' ) {
// // see if '--' form
a++;
// if ( *a != '-') {
// // Simple '-letter' or '-keyword'. Need for a value will be checked later
// keyword = a;
// value = (char *) 0;
// } else {
// // We are expecting 'keyword=value' (compound argument)
// // but will accept '--keyword value' (pair as 1 arg), which is handled below
// // skip the 2nd '-'
// a++;
// is there a value attached to this?
if (!strstr(a,"=")) {
// No, so use this argument as the keyword part. Don't bother the value part.
keyword = rtrim(a);
value = (char *) 0;
} else {
// Yes, keep the keyword and seperate into two pieces
keyword = a;
value = strstr(a,"=")+1;
// seperate the two pieces
*(strstr(a,"=")) = '\0';
keyword = ltrim(rtrim(a));
value = ltrim(rtrim(value));
}
// }
// now validate and process
strcpy(upperkey,keyword);
upcase(upperkey);
found = 0;
id = 0;
while (!found && opttab[id].keyword) {
//Is this it?
if ( ( opttab[id].upper && ISSTRING(upperkey,opttab[id].keyword)) ||
(!opttab[id].upper && ISSTRING(keyword ,opttab[id].keyword)) ) {
// Is this a duplicate?
if (*opttab[id].flag) {
printf("Error: Duplicate '%s' option found\n",keyword);
errors++;
}
// Tag it as found
*opttab[id].flag = 1; // we found it
// Is it boolean in opttab?
if (opttab[id].boolean) {
sscanf(TRUE,"%d",opttab[id].dest); // let conversion handle the cast
} else {
// No. We are expecting the general form '--keyword=value' but also accept
// --keyword <space> value
// We only need to look here and see if a 'value' is required. If it is
// but not already 'attached' at 'value', then look at the next arg (if one)
// Is value present?
if (!value) {
// no, so see if we can find it.
if (arg < ac-1) {
// these IS another arg that we can try to attach as this arg's value
// unless it's another option spec (starts with '-')
if (*av[arg+1] == '-') {
printf("Error: Option '%s' needs a value but wasn't supplied\n",keyword);
errors++;
} else {
// Ok, it's not another arg, simply tag it as the 'value' and skip over
value = av[++arg];
}
} else {
// no argument to use but is needed. Error
printf("Error: Option '%s' needs a value but wasn't supplied\n",keyword);
errors++;
}
}
// Using the format spec (fmtspec) use appropriate logic based on ther
if (*value) {
switch (opttab[id].type) {
case (string):
if (sscanf(value,"%s",opttab[id].dest) != 1) errors++;
break;
case (intger):
if (sscanf(value,"%d",opttab[id].dest) != 1) errors++;
break;
case (lngint):
if (sscanf(value,"%lu",opttab[id].dest) != 1) errors++;
break;
case (powr):
if ( strstr(value,"e") || strstr(value,"E") ) {
strcpy(newvalue,value);
upcase(newvalue);
exp = atoi(strstr(newvalue,"E")+1);
*strstr(newvalue,"E") = '\0';
ord = atoi(newvalue);
newlong = ord * power(10,exp);
sprintf(newvalue,"%lu", newlong );
value = newvalue;
}
if (sscanf(value,"%lu",opttab[id].dest) != 1) errors++;
break;
default:
if (sscanf(value,"%d",opttab[id].dest) != 1) errors++;
}
}
}
// flag it as found
found = 1;
// Flag it found
*opttab[id].flag = 1;
// increment the args found count
argcount++;
}
// step to the next keyword
if (!found) id++;
} // yes, it was a real option and it's been handled, now get the next one
} else {
// Don't know what was specified, presume it's a name until we run out of space
if (!optImp1) {
strcpy(optName1,argstring);
optImp1 = 1;
} else if (!optImp2) {
strcpy(optName2,argstring);
optImp2 = 1;
} else if (!optImp3) {
strcpy(optName3,argstring);
optImp3 = 1;
} else {
fprintf(stderr,"WARNING: [%s] unrecognized. ignored.\n",argstring);
fprintf(stderr," No more usable 'implied name' slots available.\n\n");
errors++;
}
}
} //
// if errors were encountered, don't bother returning. Exit here. No recovery possible.
if (errors) {
printf("\n %d errors encountered during processing. Recovery not possible. Exiting\n",
errors);
exit(errors);
}
// All done with the command line options
return argcount;
}
#ifdef UNIT_TEST
main(int ac, char *av[])
{
getoptions(ac,av);
}
#endif