llvm-project/lldb/source/Interpreter/Args.cpp

1178 lines
36 KiB
C++

//===-- Args.cpp ------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
#include <getopt.h>
#include <cstdlib>
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Interpreter/Args.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Interpreter/Options.h"
#include "lldb/Interpreter/CommandReturnObject.h"
using namespace lldb;
using namespace lldb_private;
static const char *k_space_characters = "\t\n\v\f\r ";
static const char *k_space_characters_with_slash = "\t\n\v\f\r \\";
//----------------------------------------------------------------------
// Args constructor
//----------------------------------------------------------------------
Args::Args (const char *command) :
m_args(),
m_argv()
{
SetCommandString (command);
}
Args::Args (const char *command, size_t len) :
m_args(),
m_argv()
{
SetCommandString (command, len);
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
Args::~Args ()
{
}
void
Args::Dump (Stream *s)
{
// int argc = GetArgumentCount();
//
// arg_sstr_collection::const_iterator pos, begin = m_args.begin(), end = m_args.end();
// for (pos = m_args.begin(); pos != end; ++pos)
// {
// s->Indent();
// s->Printf("args[%zu]=%s\n", std::distance(begin, pos), pos->c_str());
// }
// s->EOL();
const int argc = m_argv.size();
for (int i=0; i<argc; ++i)
{
s->Indent();
const char *arg_cstr = m_argv[i];
if (arg_cstr)
s->Printf("argv[%i]=\"%s\"\n", i, arg_cstr);
else
s->Printf("argv[%i]=NULL\n", i);
}
s->EOL();
}
bool
Args::GetCommandString (std::string &command)
{
command.clear();
int argc = GetArgumentCount();
for (int i=0; i<argc; ++i)
{
if (i > 0)
command += ' ';
command += m_argv[i];
}
return argc > 0;
}
void
Args::SetCommandString (const char *command, size_t len)
{
// Use std::string to make sure we get a NULL terminated string we can use
// as "command" could point to a string within a large string....
std::string null_terminated_command(command, len);
SetCommandString(null_terminated_command.c_str());
}
void
Args::SetCommandString (const char *command)
{
m_args.clear();
m_argv.clear();
if (command && command[0])
{
const char *arg_start;
const char *next_arg_start;
for (arg_start = command, next_arg_start = NULL;
arg_start && arg_start[0];
arg_start = next_arg_start, next_arg_start = NULL)
{
// Skip any leading space characters
arg_start = ::strspn (arg_start, k_space_characters) + arg_start;
// If there were only space characters to the end of the line, then
// we're done.
if (*arg_start == '\0')
break;
std::string arg;
const char *arg_end = NULL;
switch (*arg_start)
{
case '\'':
case '"':
case '`':
{
// Look for either a quote character, or the backslash
// character
const char quote_char = *arg_start;
char find_chars[3] = { quote_char, '\\' , '\0'};
bool is_backtick = (quote_char == '`');
if (quote_char == '"' || quote_char == '`')
m_args_quote_char.push_back(quote_char);
else
m_args_quote_char.push_back('\0');
while (*arg_start != '\0')
{
arg_end = ::strcspn (arg_start + 1, find_chars) + arg_start + 1;
if (*arg_end == '\0')
{
arg.append (arg_start);
break;
}
// Watch out for quote characters prefixed with '\'
if (*arg_end == '\\')
{
if (arg_end[1] == quote_char)
{
// The character following the '\' is our quote
// character so strip the backslash character
arg.append (arg_start, arg_end);
}
else
{
// The character following the '\' is NOT our
// quote character, so include the backslash
// and continue
arg.append (arg_start, arg_end + 1);
}
arg_start = arg_end + 1;
continue;
}
else
{
arg.append (arg_start, arg_end + 1);
next_arg_start = arg_end + 1;
break;
}
}
// Skip single and double quotes, but leave backtick quotes
if (!is_backtick)
{
char first_c = arg[0];
arg.erase(0,1);
// Only erase the last character if it is the same as the first.
// Otherwise, we're parsing an incomplete command line, and we
// would be stripping off the last character of that string.
if (arg[arg.size() - 1] == first_c)
arg.erase(arg.size() - 1, 1);
}
}
break;
default:
{
m_args_quote_char.push_back('\0');
// Look for the next non-escaped space character
while (*arg_start != '\0')
{
arg_end = ::strcspn (arg_start, k_space_characters_with_slash) + arg_start;
if (arg_end == NULL)
{
arg.append(arg_start);
break;
}
if (*arg_end == '\\')
{
// Append up to the '\' char
arg.append (arg_start, arg_end);
if (arg_end[1] == '\0')
break;
// Append the character following the '\' if it isn't
// the end of the string
arg.append (1, arg_end[1]);
arg_start = arg_end + 2;
continue;
}
else
{
arg.append (arg_start, arg_end);
next_arg_start = arg_end;
break;
}
}
}
break;
}
m_args.push_back(arg);
}
}
UpdateArgvFromArgs();
}
void
Args::UpdateArgsAfterOptionParsing()
{
// Now m_argv might be out of date with m_args, so we need to fix that
arg_cstr_collection::const_iterator argv_pos, argv_end = m_argv.end();
arg_sstr_collection::iterator args_pos;
arg_quote_char_collection::iterator quotes_pos;
for (argv_pos = m_argv.begin(), args_pos = m_args.begin(), quotes_pos = m_args_quote_char.begin();
argv_pos != argv_end && args_pos != m_args.end();
++argv_pos)
{
const char *argv_cstr = *argv_pos;
if (argv_cstr == NULL)
break;
while (args_pos != m_args.end())
{
const char *args_cstr = args_pos->c_str();
if (args_cstr == argv_cstr)
{
// We found the argument that matches the C string in the
// vector, so we can now look for the next one
++args_pos;
++quotes_pos;
break;
}
else
{
quotes_pos = m_args_quote_char.erase (quotes_pos);
args_pos = m_args.erase (args_pos);
}
}
}
if (args_pos != m_args.end())
m_args.erase (args_pos, m_args.end());
if (quotes_pos != m_args_quote_char.end())
m_args_quote_char.erase (quotes_pos, m_args_quote_char.end());
}
void
Args::UpdateArgvFromArgs()
{
m_argv.clear();
arg_sstr_collection::const_iterator pos, end = m_args.end();
for (pos = m_args.begin(); pos != end; ++pos)
m_argv.push_back(pos->c_str());
m_argv.push_back(NULL);
}
size_t
Args::GetArgumentCount() const
{
if (m_argv.empty())
return 0;
return m_argv.size() - 1;
}
const char *
Args::GetArgumentAtIndex (size_t idx) const
{
if (idx < m_argv.size())
return m_argv[idx];
return NULL;
}
char
Args::GetArgumentQuoteCharAtIndex (size_t idx) const
{
if (idx < m_args_quote_char.size())
return m_args_quote_char[idx];
return '\0';
}
char **
Args::GetArgumentVector()
{
if (!m_argv.empty())
return (char **)&m_argv[0];
return NULL;
}
const char **
Args::GetConstArgumentVector() const
{
if (!m_argv.empty())
return (const char **)&m_argv[0];
return NULL;
}
void
Args::Shift ()
{
// Don't pop the last NULL terminator from the argv array
if (m_argv.size() > 1)
{
m_argv.erase(m_argv.begin());
m_args.pop_front();
m_args_quote_char.erase(m_args_quote_char.begin());
}
}
const char *
Args::Unshift (const char *arg_cstr, char quote_char)
{
m_args.push_front(arg_cstr);
m_argv.insert(m_argv.begin(), m_args.front().c_str());
m_args_quote_char.insert(m_args_quote_char.begin(), quote_char);
return GetArgumentAtIndex (0);
}
void
Args::AppendArguments (const Args &rhs)
{
const size_t rhs_argc = rhs.GetArgumentCount();
for (size_t i=0; i<rhs_argc; ++i)
AppendArgument(rhs.GetArgumentAtIndex(i));
}
const char *
Args::AppendArgument (const char *arg_cstr, char quote_char)
{
return InsertArgumentAtIndex (GetArgumentCount(), arg_cstr, quote_char);
}
const char *
Args::InsertArgumentAtIndex (size_t idx, const char *arg_cstr, char quote_char)
{
// Since we are using a std::list to hold onto the copied C string and
// we don't have direct access to the elements, we have to iterate to
// find the value.
arg_sstr_collection::iterator pos, end = m_args.end();
size_t i = idx;
for (pos = m_args.begin(); i > 0 && pos != end; ++pos)
--i;
pos = m_args.insert(pos, arg_cstr);
m_args_quote_char.insert(m_args_quote_char.begin() + idx, quote_char);
UpdateArgvFromArgs();
return GetArgumentAtIndex(idx);
}
const char *
Args::ReplaceArgumentAtIndex (size_t idx, const char *arg_cstr, char quote_char)
{
// Since we are using a std::list to hold onto the copied C string and
// we don't have direct access to the elements, we have to iterate to
// find the value.
arg_sstr_collection::iterator pos, end = m_args.end();
size_t i = idx;
for (pos = m_args.begin(); i > 0 && pos != end; ++pos)
--i;
if (pos != end)
{
pos->assign(arg_cstr);
assert(idx < m_argv.size() - 1);
m_argv[idx] = pos->c_str();
m_args_quote_char[idx] = quote_char;
return GetArgumentAtIndex(idx);
}
return NULL;
}
void
Args::DeleteArgumentAtIndex (size_t idx)
{
// Since we are using a std::list to hold onto the copied C string and
// we don't have direct access to the elements, we have to iterate to
// find the value.
arg_sstr_collection::iterator pos, end = m_args.end();
size_t i = idx;
for (pos = m_args.begin(); i > 0 && pos != end; ++pos)
--i;
if (pos != end)
{
m_args.erase (pos);
assert(idx < m_argv.size() - 1);
m_argv.erase(m_argv.begin() + idx);
m_args_quote_char.erase(m_args_quote_char.begin() + idx);
}
}
void
Args::SetArguments (int argc, const char **argv)
{
// m_argv will be rebuilt in UpdateArgvFromArgs() below, so there is
// no need to clear it here.
m_args.clear();
m_args_quote_char.clear();
// Make a copy of the arguments in our internal buffer
size_t i;
// First copy each string
for (i=0; i<argc; ++i)
{
m_args.push_back (argv[i]);
if ((argv[i][0] == '"') || (argv[i][0] == '`'))
m_args_quote_char.push_back (argv[i][0]);
else
m_args_quote_char.push_back ('\0');
}
UpdateArgvFromArgs();
}
Error
Args::ParseOptions (Options &options)
{
StreamString sstr;
Error error;
struct option *long_options = options.GetLongOptions();
if (long_options == NULL)
{
error.SetErrorStringWithFormat("Invalid long options.\n");
return error;
}
for (int i=0; long_options[i].name != NULL; ++i)
{
if (long_options[i].flag == NULL)
{
sstr << (char)long_options[i].val;
switch (long_options[i].has_arg)
{
default:
case no_argument: break;
case required_argument: sstr << ':'; break;
case optional_argument: sstr << "::"; break;
}
}
}
#ifdef __GLIBC__
optind = 0;
#else
optreset = 1;
optind = 1;
#endif
int val;
while (1)
{
int long_options_index = -1;
val = ::getopt_long(GetArgumentCount(), GetArgumentVector(), sstr.GetData(), long_options,
&long_options_index);
if (val == -1)
break;
// Did we get an error?
if (val == '?')
{
error.SetErrorStringWithFormat("Unknown or ambiguous option.\n");
break;
}
// The option auto-set itself
if (val == 0)
continue;
((Options *) &options)->OptionSeen (val);
// Lookup the long option index
if (long_options_index == -1)
{
for (int i=0;
long_options[i].name || long_options[i].has_arg || long_options[i].flag || long_options[i].val;
++i)
{
if (long_options[i].val == val)
{
long_options_index = i;
break;
}
}
}
// Call the callback with the option
if (long_options_index >= 0)
{
error = options.SetOptionValue(long_options_index,
long_options[long_options_index].has_arg == no_argument ? NULL : optarg);
}
else
{
error.SetErrorStringWithFormat("Invalid option with value '%i'.\n", val);
}
if (error.Fail())
break;
}
// Update our ARGV now that get options has consumed all the options
m_argv.erase(m_argv.begin(), m_argv.begin() + optind);
UpdateArgsAfterOptionParsing ();
return error;
}
void
Args::Clear ()
{
m_args.clear ();
m_argv.clear ();
m_args_quote_char.clear();
}
int32_t
Args::StringToSInt32 (const char *s, int32_t fail_value, int base, bool *success_ptr)
{
if (s && s[0])
{
char *end = NULL;
int32_t uval = ::strtol (s, &end, base);
if (*end == '\0')
{
if (success_ptr) *success_ptr = true;
return uval; // All characters were used, return the result
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
uint32_t
Args::StringToUInt32 (const char *s, uint32_t fail_value, int base, bool *success_ptr)
{
if (s && s[0])
{
char *end = NULL;
uint32_t uval = ::strtoul (s, &end, base);
if (*end == '\0')
{
if (success_ptr) *success_ptr = true;
return uval; // All characters were used, return the result
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
int64_t
Args::StringToSInt64 (const char *s, int64_t fail_value, int base, bool *success_ptr)
{
if (s && s[0])
{
char *end = NULL;
int64_t uval = ::strtoll (s, &end, base);
if (*end == '\0')
{
if (success_ptr) *success_ptr = true;
return uval; // All characters were used, return the result
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
uint64_t
Args::StringToUInt64 (const char *s, uint64_t fail_value, int base, bool *success_ptr)
{
if (s && s[0])
{
char *end = NULL;
uint64_t uval = ::strtoull (s, &end, base);
if (*end == '\0')
{
if (success_ptr) *success_ptr = true;
return uval; // All characters were used, return the result
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
lldb::addr_t
Args::StringToAddress (const char *s, lldb::addr_t fail_value, bool *success_ptr)
{
if (s && s[0])
{
char *end = NULL;
lldb::addr_t addr = ::strtoull (s, &end, 0);
if (*end == '\0')
{
if (success_ptr) *success_ptr = true;
return addr; // All characters were used, return the result
}
// Try base 16 with no prefix...
addr = ::strtoull (s, &end, 16);
if (*end == '\0')
{
if (success_ptr) *success_ptr = true;
return addr; // All characters were used, return the result
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
bool
Args::StringToBoolean (const char *s, bool fail_value, bool *success_ptr)
{
if (s && s[0])
{
if (::strcasecmp (s, "false") == 0 ||
::strcasecmp (s, "off") == 0 ||
::strcasecmp (s, "no") == 0 ||
::strcmp (s, "0") == 0)
{
if (success_ptr)
*success_ptr = true;
return false;
}
else
if (::strcasecmp (s, "true") == 0 ||
::strcasecmp (s, "on") == 0 ||
::strcasecmp (s, "yes") == 0 ||
::strcmp (s, "1") == 0)
{
if (success_ptr) *success_ptr = true;
return true;
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
int32_t
Args::StringToOptionEnum (const char *s, lldb::OptionEnumValueElement *enum_values, int32_t fail_value, bool *success_ptr)
{
if (enum_values && s && s[0])
{
for (int i = 0; enum_values[i].string_value != NULL ; i++)
{
if (strstr(enum_values[i].string_value, s) == enum_values[i].string_value)
{
if (success_ptr) *success_ptr = true;
return enum_values[i].value;
}
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
ScriptLanguage
Args::StringToScriptLanguage (const char *s, ScriptLanguage fail_value, bool *success_ptr)
{
if (s && s[0])
{
if ((::strcasecmp (s, "python") == 0) ||
(::strcasecmp (s, "default") == 0 && eScriptLanguagePython == eScriptLanguageDefault))
{
if (success_ptr) *success_ptr = true;
return eScriptLanguagePython;
}
if (::strcasecmp (s, "none"))
{
if (success_ptr) *success_ptr = true;
return eScriptLanguageNone;
}
}
if (success_ptr) *success_ptr = false;
return fail_value;
}
Error
Args::StringToFormat
(
const char *s,
lldb::Format &format
)
{
format = eFormatInvalid;
Error error;
if (s && s[0])
{
switch (s[0])
{
case 'y': format = eFormatBytes; break;
case 'Y': format = eFormatBytesWithASCII; break;
case 'b': format = eFormatBinary; break;
case 'B': format = eFormatBoolean; break;
case 'c': format = eFormatChar; break;
case 'C': format = eFormatCharPrintable; break;
case 'o': format = eFormatOctal; break;
case 'i':
case 'd': format = eFormatDecimal; break;
case 'u': format = eFormatUnsigned; break;
case 'x': format = eFormatHex; break;
case 'f':
case 'e':
case 'g': format = eFormatFloat; break;
case 'p': format = eFormatPointer; break;
case 's': format = eFormatCString; break;
default:
error.SetErrorStringWithFormat("Invalid format character '%c'. Valid values are:\n"
" b - binary\n"
" B - boolean\n"
" c - char\n"
" C - printable char\n"
" d - signed decimal\n"
" e - float\n"
" f - float\n"
" g - float\n"
" i - signed decimal\n"
" o - octal\n"
" s - c-string\n"
" u - unsigned decimal\n"
" x - hex\n"
" y - bytes\n"
" Y - bytes with ASCII\n", s[0]);
break;
}
if (error.Fail())
return error;
}
else
{
error.SetErrorStringWithFormat("%s option string.\n", s ? "empty" : "invalid");
}
return error;
}
void
Args::LongestCommonPrefix (std::string &common_prefix)
{
arg_sstr_collection::iterator pos, end = m_args.end();
pos = m_args.begin();
if (pos == end)
common_prefix.clear();
else
common_prefix = (*pos);
for (++pos; pos != end; ++pos)
{
size_t new_size = (*pos).size();
// First trim common_prefix if it is longer than the current element:
if (common_prefix.size() > new_size)
common_prefix.erase (new_size);
// Then trim it at the first disparity:
for (size_t i = 0; i < common_prefix.size(); i++)
{
if ((*pos)[i] != common_prefix[i])
{
common_prefix.erase(i);
break;
}
}
// If we've emptied the common prefix, we're done.
if (common_prefix.empty())
break;
}
}
void
Args::ParseAliasOptions (Options &options,
CommandReturnObject &result,
OptionArgVector *option_arg_vector)
{
StreamString sstr;
int i;
struct option *long_options = options.GetLongOptions();
if (long_options == NULL)
{
result.AppendError ("invalid long options");
result.SetStatus (eReturnStatusFailed);
return;
}
for (i = 0; long_options[i].name != NULL; ++i)
{
if (long_options[i].flag == NULL)
{
sstr << (char) long_options[i].val;
switch (long_options[i].has_arg)
{
default:
case no_argument:
break;
case required_argument:
sstr << ":";
break;
case optional_argument:
sstr << "::";
break;
}
}
}
#ifdef __GLIBC__
optind = 0;
#else
optreset = 1;
optind = 1;
#endif
int val;
while (1)
{
int long_options_index = -1;
val = ::getopt_long (GetArgumentCount(), GetArgumentVector(), sstr.GetData(), long_options,
&long_options_index);
if (val == -1)
break;
if (val == '?')
{
result.AppendError ("unknown or ambiguous option");
result.SetStatus (eReturnStatusFailed);
break;
}
if (val == 0)
continue;
((Options *) &options)->OptionSeen (val);
// Look up the long option index
if (long_options_index == -1)
{
for (int j = 0;
long_options[j].name || long_options[j].has_arg || long_options[j].flag || long_options[j].val;
++j)
{
if (long_options[j].val == val)
{
long_options_index = j;
break;
}
}
}
// See if the option takes an argument, and see if one was supplied.
if (long_options_index >= 0)
{
StreamString option_str;
option_str.Printf ("-%c", (char) val);
switch (long_options[long_options_index].has_arg)
{
case no_argument:
option_arg_vector->push_back (OptionArgPair (std::string (option_str.GetData()), "<no-argument>"));
result.SetStatus (eReturnStatusSuccessFinishNoResult);
break;
case required_argument:
if (optarg != NULL)
{
option_arg_vector->push_back (OptionArgPair (std::string (option_str.GetData()),
std::string (optarg)));
result.SetStatus (eReturnStatusSuccessFinishNoResult);
}
else
{
result.AppendErrorWithFormat ("Option '%s' is missing argument specifier.\n",
option_str.GetData());
result.SetStatus (eReturnStatusFailed);
}
break;
case optional_argument:
if (optarg != NULL)
{
option_arg_vector->push_back (OptionArgPair (std::string (option_str.GetData()),
std::string (optarg)));
result.SetStatus (eReturnStatusSuccessFinishNoResult);
}
else
{
option_arg_vector->push_back (OptionArgPair (std::string (option_str.GetData()),
"<no-argument>"));
result.SetStatus (eReturnStatusSuccessFinishNoResult);
}
break;
default:
result.AppendErrorWithFormat
("error with options table; invalid value in has_arg field for option '%c'.\n",
(char) val);
result.SetStatus (eReturnStatusFailed);
break;
}
}
else
{
result.AppendErrorWithFormat ("Invalid option with value '%c'.\n", (char) val);
result.SetStatus (eReturnStatusFailed);
}
if (long_options_index >= 0)
{
// Find option in the argument list; also see if it was supposed to take an argument and if one was
// supplied. Remove option (and argument, if given) from the argument list.
StreamString short_opt_str;
StreamString long_opt_str;
short_opt_str.Printf ("-%c", (char) long_options[long_options_index].val);
long_opt_str.Printf ("-%s", long_options[long_options_index].name);
bool found = false;
size_t end = GetArgumentCount();
for (size_t i = 0; i < end && !found; ++i)
if ((strcmp (GetArgumentAtIndex (i), short_opt_str.GetData()) == 0)
|| (strcmp (GetArgumentAtIndex (i), long_opt_str.GetData()) == 0))
{
found = true;
ReplaceArgumentAtIndex (i, "");
if ((long_options[long_options_index].has_arg != no_argument)
&& (optarg != NULL)
&& (i+1 < end)
&& (strcmp (optarg, GetArgumentAtIndex(i+1)) == 0))
ReplaceArgumentAtIndex (i+1, "");
}
}
if (!result.Succeeded())
break;
}
}
void
Args::ParseArgsForCompletion
(
Options &options,
OptionElementVector &option_element_vector,
uint32_t cursor_index
)
{
StreamString sstr;
struct option *long_options = options.GetLongOptions();
option_element_vector.clear();
if (long_options == NULL)
{
return;
}
// Leading : tells getopt to return a : for a missing option argument AND
// to suppress error messages.
sstr << ":";
for (int i = 0; long_options[i].name != NULL; ++i)
{
if (long_options[i].flag == NULL)
{
sstr << (char) long_options[i].val;
switch (long_options[i].has_arg)
{
default:
case no_argument:
break;
case required_argument:
sstr << ":";
break;
case optional_argument:
sstr << "::";
break;
}
}
}
#ifdef __GLIBC__
optind = 0;
#else
optreset = 1;
optind = 1;
#endif
opterr = 0;
int val;
const OptionDefinition *opt_defs = options.GetDefinitions();
// Fooey... getopt_long permutes the GetArgumentVector to move the options to the front.
// So we have to build another Arg and pass that to getopt_long so it doesn't
// change the one we have.
std::vector<const char *> dummy_vec (GetArgumentVector(), GetArgumentVector() + GetArgumentCount() + 1);
bool failed_once = false;
uint32_t dash_dash_pos = -1;
while (1)
{
bool missing_argument = false;
int parse_start = optind;
int long_options_index = -1;
val = ::getopt_long (dummy_vec.size() - 1,
(char *const *) &dummy_vec.front(),
sstr.GetData(),
long_options,
&long_options_index);
if (val == -1)
{
// When we're completing a "--" which is the last option on line,
if (failed_once)
break;
failed_once = true;
// If this is a bare "--" we mark it as such so we can complete it successfully later.
// Handling the "--" is a little tricky, since that may mean end of options or arguments, or the
// user might want to complete options by long name. I make this work by checking whether the
// cursor is in the "--" argument, and if so I assume we're completing the long option, otherwise
// I let it pass to getopt_long which will terminate the option parsing.
// Note, in either case we continue parsing the line so we can figure out what other options
// were passed. This will be useful when we come to restricting completions based on what other
// options we've seen on the line.
if (optind < dummy_vec.size() - 1
&& (strcmp (dummy_vec[optind-1], "--") == 0))
{
dash_dash_pos = optind - 1;
if (optind - 1 == cursor_index)
{
option_element_vector.push_back (OptionArgElement (OptionArgElement::eBareDoubleDash, optind - 1,
OptionArgElement::eBareDoubleDash));
continue;
}
else
break;
}
else
break;
}
else if (val == '?')
{
option_element_vector.push_back (OptionArgElement (OptionArgElement::eUnrecognizedArg, optind - 1,
OptionArgElement::eUnrecognizedArg));
continue;
}
else if (val == 0)
{
continue;
}
else if (val == ':')
{
// This is a missing argument.
val = optopt;
missing_argument = true;
}
((Options *) &options)->OptionSeen (val);
// Look up the long option index
if (long_options_index == -1)
{
for (int j = 0;
long_options[j].name || long_options[j].has_arg || long_options[j].flag || long_options[j].val;
++j)
{
if (long_options[j].val == val)
{
long_options_index = j;
break;
}
}
}
// See if the option takes an argument, and see if one was supplied.
if (long_options_index >= 0)
{
int opt_defs_index = -1;
for (int i = 0; ; i++)
{
if (opt_defs[i].short_option == 0)
break;
else if (opt_defs[i].short_option == val)
{
opt_defs_index = i;
break;
}
}
switch (long_options[long_options_index].has_arg)
{
case no_argument:
option_element_vector.push_back (OptionArgElement (opt_defs_index, parse_start, 0));
break;
case required_argument:
if (optarg != NULL)
{
int arg_index;
if (missing_argument)
arg_index = -1;
else
arg_index = optind - 1;
option_element_vector.push_back (OptionArgElement (opt_defs_index, optind - 2, arg_index));
}
else
{
option_element_vector.push_back (OptionArgElement (opt_defs_index, optind - 1, -1));
}
break;
case optional_argument:
if (optarg != NULL)
{
option_element_vector.push_back (OptionArgElement (opt_defs_index, optind - 2, optind - 1));
}
else
{
option_element_vector.push_back (OptionArgElement (opt_defs_index, optind - 2, optind - 1));
}
break;
default:
// The options table is messed up. Here we'll just continue
option_element_vector.push_back (OptionArgElement (OptionArgElement::eUnrecognizedArg, optind - 1,
OptionArgElement::eUnrecognizedArg));
break;
}
}
else
{
option_element_vector.push_back (OptionArgElement (OptionArgElement::eUnrecognizedArg, optind - 1,
OptionArgElement::eUnrecognizedArg));
}
}
// Finally we have to handle the case where the cursor index points at a single "-". We want to mark that in
// the option_element_vector, but only if it is not after the "--". But it turns out that getopt_long just ignores
// an isolated "-". So we have to look it up by hand here. We only care if it is AT the cursor position.
if ((dash_dash_pos == -1 || cursor_index < dash_dash_pos)
&& strcmp (GetArgumentAtIndex(cursor_index), "-") == 0)
{
option_element_vector.push_back (OptionArgElement (OptionArgElement::eBareDash, cursor_index,
OptionArgElement::eBareDash));
}
}