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#include "option.h"
#include "config.h"
#include "debug.h"
#include <iostream>
#include <cstdarg>
#include "util.h"
namespace {
inline void process_option(option_t * opt, const char * arg = NULL) {
if (! opt->handled) {
opt->handler(arg);
opt->handled = true;
}
}
option_t * search_options(option_t * array, const char * name)
{
int first = 0;
int last = CONFIG_OPTIONS_SIZE;
while (first <= last) {
int mid = (first + last) / 2; // compute mid point.
int result;
if ((result = (int)name[0] - (int)array[mid].long_opt[0]) == 0)
result = std::strcmp(name, array[mid].long_opt);
if (result > 0)
first = mid + 1; // repeat search in top half.
else if (result < 0)
last = mid - 1; // repeat search in bottom half.
else
return &array[mid];
}
return NULL;
}
option_t * search_options(option_t * array, const char letter)
{
for (int i = 0; i < CONFIG_OPTIONS_SIZE; i++)
if (letter == array[i].short_opt)
return &array[i];
return NULL;
}
}
bool process_option(option_t * options, const std::string& name,
const char * arg)
{
option_t * opt = search_options(options, name.c_str());
if (opt && ! opt->handled) {
opt->handler(arg);
opt->handled = true;
return true;
}
return false;
}
void process_arguments(option_t * options, int argc, char ** argv,
const bool anywhere, std::list<std::string>& args)
{
int index = 0;
for (char ** i = argv; *i; i++) {
if ((*i)[0] != '-') {
if (anywhere) {
args.push_back(*i);
continue;
} else {
for (; *i; i++)
args.push_back(*i);
break;
}
}
// --long-option or -s
again:
option_t * opt = NULL;
char * value = NULL;
if ((*i)[1] == '-') {
if ((*i)[2] == '\0')
break;
char * name = *i + 2;
if (char * p = std::strchr(name, '=')) {
*p++ = '\0';
value = p;
}
opt = search_options(options, name);
if (! opt)
throw option_error(std::string("illegal option --") + name);
if (opt->wants_arg && ! value) {
value = *++i;
if (! value)
throw option_error(std::string("missing option argument for --") +
name);
}
process_option(opt, value);
} else {
char c = (*i)[1];
opt = search_options(options, c);
if (! opt)
throw option_error(std::string("illegal option -") + c);
if (opt->wants_arg) {
value = *++i;
if (! value)
throw option_error(std::string("missing option argument for -") + c);
}
}
assert(opt);
assert(! value || opt->wants_arg);
process_option(opt, value);
next:
;
}
}
void process_environment(option_t * options, char ** envp,
const std::string& tag)
{
const char * tag_p = tag.c_str();
unsigned int tag_len = tag.length();
for (char ** p = envp; *p; p++)
if (! tag_p || std::strncmp(*p, tag_p, tag_len) == 0) {
char buf[128];
char * r = buf;
char * q;
for (q = *p + tag_len;
*q && *q != '=' && r - buf < 128;
q++)
if (*q == '_')
*r++ = '-';
else
*r++ = std::tolower(*q);
*r = '\0';
if (*q == '=')
process_option(options, buf, q + 1);
}
}
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