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git-crypt/parse_options.cpp at master · adamluzsi-backup/git-crypt · GitHub
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parse_options.cpp
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/*
* Copyright 2014 Andrew Ayer
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*/
#
include
"
parse_options.hpp
"
#
include
<
cstring
>
static
const
Option_def*
find_option
(
const
Options_list& options,
const
std::string& name)
{
for
(Options_list::const_iterator
opt
(options.
begin
()); opt != options.
end
(); ++opt) {
if
(opt->
name
== name) {
return
&*opt;
}
}
return
0
;
}
int
parse_options
(
const
Options_list& options,
int
argc,
const
char
** argv)
{
int
argi =
0
;
while
(argi < argc && argv[argi][
0
] ==
'
-
'
&& argv[argi][
1
] !=
'
\0
'
) {
if
(
std::strcmp
(argv[argi],
"
--
"
) ==
0
) {
++argi;
break
;
}
else
if
(
std::strncmp
(argv[argi],
"
--
"
,
2
) ==
0
) {
std::string option_name;
const
char
* option_value =
0
;
if
(
const
char
* eq =
std::strchr
(argv[argi],
'
=
'
)) {
option_name.
assign
(argv[argi], eq);
option_value = eq +
1
;
}
else
{
option_name = argv[argi];
}
++argi;
const
Option_def*
opt
(
find_option
(options, option_name));
if
(!opt) {
throw
Option_error
(option_name,
"
Invalid option
"
);
}
if
(opt->
is_set
) {
*opt->
is_set
=
true
;
}
if
(opt->
value
) {
if
(option_value) {
*opt->
value
= option_value;
}
else
{
if
(argi >= argc) {
throw
Option_error
(option_name,
"
Option requires a value
"
);
}
*opt->
value
= argv[argi];
++argi;
}
}
else
{
if
(option_value) {
throw
Option_error
(option_name,
"
Option takes no value
"
);
}
}
}
else
{
const
char
* arg = argv[argi] +
1
;
++argi;
while
(*arg) {
std::string
option_name
(
"
-
"
);
option_name.
push_back
(*arg);
++arg;
const
Option_def*
opt
(
find_option
(options, option_name));
if
(!opt) {
throw
Option_error
(option_name,
"
Invalid option
"
);
}
if
(opt->
is_set
) {
*opt->
is_set
=
true
;
}
if
(opt->
value
) {
if
(*arg) {
*opt->
value
= arg;
}
else
{
if
(argi >= argc) {
throw
Option_error
(option_name,
"
Option requires a value
"
);
}
*opt->
value
= argv[argi];
++argi;
}
break
;
}
}
}
}
return
argi;
}
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