void OptionsList::usage()
{
size_t len;
char buffer[1024], *cp;
cp = buffer;
len = sprintf(buffer, "Usage: %s ", program_);
cp += len;
bool hasSimpleFlags = false;
for (list<Option>::iterator iter = begin(); iter != end(); iter++)
{
Option *opt = &(*iter);
if (opt->getName() != NULL &&
!opt->hasArgument() &&
(len = strlen(opt->getName())) == 1)
{
hasSimpleFlags = true;
break;
}
}
if (hasSimpleFlags)
{
*cp++ = '[';
*cp++ = '-';
for (list<Option>::iterator iter = begin(); iter != end(); iter++)
{
Option *opt = &(*iter);
if (opt->getName() != NULL &&
!opt->hasArgument() &&
(len = strlen(opt->getName())) == 1)
{
strcpy(cp, opt->getName());
cp += len;
}
}
*cp++ = ']';
}
char staging[128], *cp2;
for (list<Option>::iterator iter = begin(); iter != end(); iter++)
{
Option *opt = &(*iter);
if (opt->getName() != NULL && !opt->hasArgument() && (len = strlen(opt->getName())) == 1)
continue;
*cp++ = ' ';
cp2 = staging;
if (!opt->isRequired())
{
*cp2++ = '[';
}
if (opt->getType() == Option::eList)
{
*cp2++ = '{';
}
if (opt->getName() != NULL && !opt->hasArgument() && strlen(opt->getName()) > 1)
{
len = sprintf(cp2, "-%s", opt->getName());
cp2 += len;
}
else if (opt->getName() != NULL && opt->hasArgument())
{
len = sprintf(cp2, "-%s <%s>", opt->getName(), opt->getArgDesc());
cp2 += len;
}
else if (opt->getName() == NULL)
{
len = sprintf(cp2, "<%s>", opt->getArgDesc());
cp2 += len;
}
if (opt->getType() == Option::eList)
{
*cp2++ = '}';
*cp2++ = '.';
*cp2++ = '.';
*cp2++ = '.';
}
if (!opt->isRequired())
{
*cp2++ = ']';
}
*cp2 = '\0';
if (((cp2 - staging) + (cp - buffer)) > 79)
{
*cp++ = '\n';
*cp = '\0';
fputs(buffer, stderr);
strcpy(buffer, " ");
cp = buffer + 8;
}
strcpy(cp, staging);
cp += cp2 - staging;
}
*cp++ = '\n';
*cp = '\0';
fputs(buffer, stderr);
for (list<Option>::iterator iter = begin(); iter != end(); iter++)
{
Option *opt = &(*iter);
if (opt->getName() != NULL)
{
if (opt->hasArgument())
sprintf(buffer, "-%-2.2s <%s>", opt->getName(), opt->getArgDesc());
else
sprintf(buffer, "-%-6.6s", opt->getName());
}
else if (opt->getOrder() >= 0)
{
sprintf(buffer, "<%s>", opt->getArgDesc());
}
else
{
sprintf(buffer, "<%s>...", opt->getArgDesc());
}
fprintf(stderr, " %-20.20s : ", buffer);
const char *cp = opt->getUsage();
while (*cp != '\0')
{
if (*cp == '\n')
{
fputc(*cp, stderr);
int count = 4 + 20 + 1;
while (count--)
fputc(' ', stderr);
fputc('>', stderr);
fputc(' ', stderr);
}
else
{
fputc(*cp, stderr);
}
cp++;
}
fputc('\n', stderr);
}
exit(256);
}
int OptionsList::parse(int &aArgc, const char **aArgv)
{
sort();
// This assumes that the first option (app name) has already been removed.
int order = 0, count = 0;
program_ = "agent";
Option *opt;
const char **argp = aArgv;
const char *cp;
while (aArgc > 0)
{
if (**argp == '-')
{
cp = (*argp) + 1;
bool next = false;
while (*cp != 0 && !next)
{
if (find(cp, opt))
{
count++;
if (opt->hasArgument())
{
getArg(argp, aArgc, opt, cp);
next = true;
}
else
{
if (opt->type_ != Option::eBoolean)
{
cerr << "Bad argument definition: " << opt->getName() << endl;
}
else if (opt->isSet_)
{
cerr << "Option " << opt->getName() << " is already specified" << endl;
usage();
}
else
{
*(opt->boolPtr_) = true;
}
cp += strlen(opt->getName());
}
opt->isSet_ = true;
}
else
{
cerr << "Bad argument:" << *argp << endl;
usage();
}
}
}
else
{
if (find(order, opt))
{
if (!opt->setValue(*argp))
usage();
count++;
}
else if (find(-1, opt))
{
if (!opt->setValue(*argp))
usage();
count++;
}
order++;
}
argp++;
aArgc--;
}
for (list<Option>::iterator iter = begin(); iter != end(); iter++)
{
opt = &(*iter);
if (opt->isRequired() && !opt->isSet())
{
if (opt->getName() != NULL)
cerr << "Required option -" << opt->getName() << " is not specified" << endl;
else
cerr << "Required option <" << opt->getArgDesc() << "> is not specified" << endl;
usage();
}
}
return count;
}
