mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-25 12:23:09 +00:00
refactor wgetopt.cpp to reduce complexity
This commit is contained in:
Kurtis Rader
parent
a312abdeb8
commit
1e9c9e01e5
2 changed files with 203 additions and 156 deletions
352
src/wgetopt.cpp
352
src/wgetopt.cpp
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@ -170,24 +170,27 @@ void wgetopter_t::_wgetopt_initialize(const wchar_t *optstring) {
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++optstring;
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}
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initialized = true;
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shortopts = optstring;
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initialized = true;
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}
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// Advance to the next ARGV-element.
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int wgetopter_t::_advance_to_next_argv(int argc, wchar_t **argv, const struct woption *longopts) {
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int wgetopter_t::_advance_to_next_argv( //!OCLINT(high cyclomatic complexity)
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int argc, wchar_t **argv, const struct woption *longopts) {
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if (ordering == PERMUTE) {
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// If we have just processed some options following some non-options, exchange them so
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// that the options come first.
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if (first_nonopt != last_nonopt && last_nonopt != woptind)
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if (first_nonopt != last_nonopt && last_nonopt != woptind) {
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exchange(argv);
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else if (last_nonopt != woptind)
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} else if (last_nonopt != woptind) {
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first_nonopt = woptind;
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}
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// Skip any additional non-options and extend the range of non-options previously
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// skipped.
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while (woptind < argc && (argv[woptind][0] != '-' || argv[woptind][1] == '\0'))
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while (woptind < argc && (argv[woptind][0] != '-' || argv[woptind][1] == '\0')) {
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woptind++;
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}
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last_nonopt = woptind;
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}
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@ -197,12 +200,12 @@ int wgetopter_t::_advance_to_next_argv(int argc, wchar_t **argv, const struct wo
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if (woptind != argc && !wcscmp(argv[woptind], L"--")) {
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woptind++;
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if (first_nonopt != last_nonopt && last_nonopt != woptind)
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if (first_nonopt != last_nonopt && last_nonopt != woptind) {
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exchange(argv);
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else if (first_nonopt == last_nonopt)
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} else if (first_nonopt == last_nonopt) {
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first_nonopt = woptind;
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}
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last_nonopt = argc;
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woptind = argc;
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}
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@ -229,6 +232,188 @@ int wgetopter_t::_advance_to_next_argv(int argc, wchar_t **argv, const struct wo
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return 0;
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}
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// Check for a matching short opt.
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int wgetopter_t::_handle_short_opt(int argc, wchar_t **argv) {
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// Look at and handle the next short option-character.
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wchar_t c = *nextchar++;
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wchar_t *temp = const_cast<wchar_t *>(my_index(shortopts, c));
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// Increment `woptind' when we start to process its last character.
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if (*nextchar == '\0') ++woptind;
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if (temp == NULL || c == ':') {
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if (wopterr) {
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fwprintf(stderr, _(L"%ls: Invalid option -- %lc\n"), argv[0], (wint_t)c);
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}
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woptopt = c;
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if (*nextchar != '\0') woptind++;
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return '?';
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}
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if (temp[1] != ':') {
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return c;
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}
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if (temp[2] == ':') {
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// This is an option that accepts an argument optionally.
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if (*nextchar != '\0') {
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woptarg = nextchar;
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woptind++;
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} else {
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woptarg = NULL;
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}
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nextchar = NULL;
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} else {
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// This is an option that requires an argument.
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if (*nextchar != '\0') {
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woptarg = nextchar;
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// If we end this ARGV-element by taking the rest as an arg, we must advance to
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// the next element now.
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woptind++;
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} else if (woptind == argc) {
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if (wopterr) {
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// 1003.2 specifies the format of this message.
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fwprintf(stderr, _(L"%ls: Option requires an argument -- %lc\n"), argv[0],
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(wint_t)c);
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}
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woptopt = c;
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c = missing_arg_return_colon ? ':' : '?';
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} else {
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// We already incremented `woptind' once; increment it again when taking next
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// ARGV-elt as argument.
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woptarg = argv[woptind++];
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}
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nextchar = NULL;
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}
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return c;
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}
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void wgetopter_t::_update_long_opt(int argc, wchar_t **argv, const struct woption *pfound,
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wchar_t *nameend, int *longind, int option_index, int *retval) {
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woptind++;
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if (*nameend) {
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// Don't test has_arg with >, because some C compilers don't allow it to be used on
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// enums.
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if (pfound->has_arg)
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woptarg = nameend + 1;
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else {
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if (wopterr) {
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if (argv[woptind - 1][1] == '-') // --option
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fwprintf(stderr, _(L"%ls: Option '--%ls' doesn't allow an argument\n"), argv[0],
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pfound->name);
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else
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// +option or -option
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fwprintf(stderr, _(L"%ls: Option '%lc%ls' doesn't allow an argument\n"),
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argv[0], argv[woptind - 1][0], pfound->name);
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}
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nextchar += wcslen(nextchar);
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*retval = '?';
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return;
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}
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} else if (pfound->has_arg == 1) {
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if (woptind < argc)
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woptarg = argv[woptind++];
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else {
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if (wopterr)
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fwprintf(stderr, _(L"%ls: Option '%ls' requires an argument\n"), argv[0],
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argv[woptind - 1]);
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nextchar += wcslen(nextchar);
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*retval = missing_arg_return_colon ? ':' : '?';
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return;
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}
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}
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nextchar += wcslen(nextchar);
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if (longind != NULL) *longind = option_index;
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if (pfound->flag) {
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*(pfound->flag) = pfound->val;
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*retval = 0;
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} else {
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*retval = pfound->val;
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}
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}
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// Find a matching long opt.
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const struct woption *wgetopter_t::_find_matching_long_opt(const struct woption *longopts,
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wchar_t *nameend, int *exact, int *ambig,
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int *indfound) {
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const struct woption *pfound = NULL;
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int option_index = 0;
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// Test all long options for either exact match or abbreviated matches.
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for (const struct woption *p = longopts; p->name; p++, option_index++) {
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if (!wcsncmp(p->name, nextchar, nameend - nextchar)) {
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if ((unsigned int)(nameend - nextchar) == (unsigned int)wcslen(p->name)) {
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// Exact match found.
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pfound = p;
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*indfound = option_index;
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*exact = 1;
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break;
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} else if (pfound == NULL) {
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// First nonexact match found.
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pfound = p;
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*indfound = option_index;
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} else
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// Second or later nonexact match found.
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*ambig = 1;
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}
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}
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return pfound;
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}
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// Check for a matching long opt.
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bool wgetopter_t::_handle_long_opt(int argc, wchar_t **argv, const struct woption *longopts,
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int *longind, int long_only, int *retval) {
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int exact = 0;
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int ambig = 0;
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int indfound = 0;
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wchar_t *nameend;
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for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
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; //!OCLINT(empty body)
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const struct woption *pfound =
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_find_matching_long_opt(longopts, nameend, &exact, &ambig, &indfound);
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if (ambig && !exact) {
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if (wopterr) {
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fwprintf(stderr, _(L"%ls: Option '%ls' is ambiguous\n"), argv[0], argv[woptind]);
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}
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nextchar += wcslen(nextchar);
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woptind++;
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*retval = '?';
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return true;
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}
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if (pfound) {
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_update_long_opt(argc, argv, pfound, nameend, longind, indfound, retval);
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return true;
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}
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// Can't find it as a long option. If this is not getopt_long_only, or the option starts
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// with '--' or is not a valid short option, then it's an error. Otherwise interpret it as a
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// short option.
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if (!long_only || argv[woptind][1] == '-' || my_index(shortopts, *nextchar) == NULL) {
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if (wopterr) {
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if (argv[woptind][1] == '-') // --option
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fwprintf(stderr, _(L"%ls: Unrecognized option '--%ls'\n"), argv[0], nextchar);
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else
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// +option or -option
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fwprintf(stderr, _(L"%ls: Unrecognized option '%lc%ls'\n"), argv[0],
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argv[woptind][0], nextchar);
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}
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nextchar = (wchar_t *)L"";
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woptind++;
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*retval = '?';
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return true;
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}
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return false;
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}
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// Scan elements of ARGV (whose length is ARGC) for option characters given in OPTSTRING.
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//
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// If an element of ARGV starts with '-', and is not exactly "-" or "--", then it is an option
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@ -295,156 +480,11 @@ int wgetopter_t::_wgetopt_internal(int argc, wchar_t **argv, const wchar_t *opts
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if (longopts != NULL &&
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(argv[woptind][1] == '-' ||
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(long_only && (argv[woptind][2] || !my_index(shortopts, argv[woptind][1]))))) {
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wchar_t *nameend;
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const struct woption *p;
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const struct woption *pfound = NULL;
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int exact = 0;
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int ambig = 0;
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int indfound = 0; // set to zero by Anton
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int option_index;
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for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
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; //!OCLINT(empty body)
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// Test all long options for either exact match or abbreviated matches.
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for (p = longopts, option_index = 0; p->name; p++, option_index++)
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if (!wcsncmp(p->name, nextchar, nameend - nextchar)) {
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if ((unsigned int)(nameend - nextchar) == (unsigned int)wcslen(p->name)) {
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// Exact match found.
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pfound = p;
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indfound = option_index;
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exact = 1;
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break;
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} else if (pfound == NULL) {
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// First nonexact match found.
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pfound = p;
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indfound = option_index;
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} else
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// Second or later nonexact match found.
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ambig = 1;
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}
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if (ambig && !exact) {
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if (wopterr)
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fwprintf(stderr, _(L"%ls: Option '%ls' is ambiguous\n"), argv[0], argv[woptind]);
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nextchar += wcslen(nextchar);
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woptind++;
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return '?';
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}
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if (pfound != NULL) {
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option_index = indfound;
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woptind++;
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if (*nameend) {
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// Don't test has_arg with >, because some C compilers don't allow it to be used on
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// enums.
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if (pfound->has_arg)
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woptarg = nameend + 1;
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else {
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if (wopterr) {
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if (argv[woptind - 1][1] == '-') // --option
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fwprintf(stderr, _(L"%ls: Option '--%ls' doesn't allow an argument\n"),
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argv[0], pfound->name);
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else
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// +option or -option
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fwprintf(stderr, _(L"%ls: Option '%lc%ls' doesn't allow an argument\n"),
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argv[0], argv[woptind - 1][0], pfound->name);
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}
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nextchar += wcslen(nextchar);
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return '?';
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}
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} else if (pfound->has_arg == 1) {
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if (woptind < argc)
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woptarg = argv[woptind++];
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else {
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if (wopterr)
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fwprintf(stderr, _(L"%ls: Option '%ls' requires an argument\n"), argv[0],
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argv[woptind - 1]);
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nextchar += wcslen(nextchar);
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return missing_arg_return_colon ? ':' : '?';
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}
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}
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nextchar += wcslen(nextchar);
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if (longind != NULL) *longind = option_index;
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if (pfound->flag) {
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*(pfound->flag) = pfound->val;
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return 0;
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}
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return pfound->val;
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}
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// Can't find it as a long option. If this is not getopt_long_only, or the option starts
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// with '--' or is not a valid short option, then it's an error. Otherwise interpret it as a
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// short option.
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if (!long_only || argv[woptind][1] == '-' || my_index(shortopts, *nextchar) == NULL) {
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if (wopterr) {
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if (argv[woptind][1] == '-') // --option
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fwprintf(stderr, _(L"%ls: Unrecognized option '--%ls'\n"), argv[0], nextchar);
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else
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// +option or -option
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fwprintf(stderr, _(L"%ls: Unrecognized option '%lc%ls'\n"), argv[0],
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argv[woptind][0], nextchar);
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}
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nextchar = (wchar_t *)L"";
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woptind++;
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return '?';
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}
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int retval;
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if (_handle_long_opt(argc, argv, longopts, longind, long_only, &retval)) return retval;
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}
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// Look at and handle the next short option-character.
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wchar_t c = *nextchar++;
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wchar_t *temp = const_cast<wchar_t *>(my_index(shortopts, c));
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// Increment `woptind' when we start to process its last character.
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if (*nextchar == '\0') ++woptind;
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if (temp == NULL || c == ':') {
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if (wopterr) {
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fwprintf(stderr, _(L"%ls: Invalid option -- %lc\n"), argv[0], (wint_t)c);
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}
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woptopt = c;
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if (*nextchar != '\0') woptind++;
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return '?';
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}
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if (temp[1] != ':') {
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return c;
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}
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if (temp[2] == ':') {
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// This is an option that accepts an argument optionally.
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if (*nextchar != '\0') {
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woptarg = nextchar;
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woptind++;
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} else {
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woptarg = NULL;
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}
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nextchar = NULL;
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} else {
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// This is an option that requires an argument.
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if (*nextchar != '\0') {
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woptarg = nextchar;
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// If we end this ARGV-element by taking the rest as an arg, we must advance to
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// the next element now.
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woptind++;
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} else if (woptind == argc) {
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if (wopterr) {
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// 1003.2 specifies the format of this message.
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fwprintf(stderr, _(L"%ls: Option requires an argument -- %lc\n"), argv[0],
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(wint_t)c);
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}
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woptopt = c;
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c = missing_arg_return_colon ? ':' : '?';
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} else {
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// We already incremented `woptind' once; increment it again when taking next
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// ARGV-elt as argument.
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woptarg = argv[woptind++];
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}
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nextchar = NULL;
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}
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return c;
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return _handle_short_opt(argc, argv);
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}
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int wgetopter_t::wgetopt_long(int argc, wchar_t **argv, const wchar_t *options,
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@ -53,6 +53,13 @@ class wgetopter_t {
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int _wgetopt_internal(int argc, wchar_t **argv, const wchar_t *optstring,
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const struct woption *longopts, int *longind, int long_only);
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int _advance_to_next_argv(int argc, wchar_t **argv, const struct woption *longopts);
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int _handle_short_opt(int argc, wchar_t **argv);
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bool _handle_long_opt(int argc, wchar_t **argv, const struct woption *longopts, int *longind,
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int long_only, int *retval);
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const struct woption *_find_matching_long_opt(const struct woption *longopts, wchar_t *nameend,
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int *exact, int *ambig, int *indfound);
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void _update_long_opt(int argc, wchar_t **argv, const struct woption *pfound, wchar_t *nameend,
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int *longind, int option_index, int *retval);
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public:
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// For communication from `getopt' to the caller. When `getopt' finds an option that takes an
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